* Step 1: Sum WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict TRS:
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1
            ,#s/1,#true/0,::/2,nil/0,tuple#2/2}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt,#compare,#less,merge,merge#1,merge#2,merge#3
            ,mergesort,mergesort#1,mergesort#2,mergesort#3,msplit,msplit#1,msplit#2,msplit#3} and constructors {#0,#EQ
            ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Sum {left = someStrategy, right = someStrategy}
    + Details:
        ()
* Step 2: DependencyPairs WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict TRS:
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1
            ,#s/1,#true/0,::/2,nil/0,tuple#2/2}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt,#compare,#less,merge,merge#1,merge#2,merge#3
            ,mergesort,mergesort#1,mergesort#2,mergesort#3,msplit,msplit#1,msplit#2,msplit#3} and constructors {#0,#EQ
            ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        DependencyPairs {dpKind_ = DT}
    + Details:
        We add the following dependency tuples:
        
        Strict DPs
          #less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y))
          merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          merge#1#(nil(),@l2) -> c_4()
          merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
          merge#2#(nil(),@x,@xs) -> c_6()
          merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
          merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          mergesort#(@l) -> c_9(mergesort#1#(@l))
          mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          mergesort#1#(nil()) -> c_11()
          mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                ,msplit#(::(@x1,::(@x2,@xs'))))
          mergesort#2#(nil(),@x1) -> c_13()
          mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                ,mergesort#(@l1)
                                                ,mergesort#(@l2))
          msplit#(@l) -> c_15(msplit#1#(@l))
          msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          msplit#1#(nil()) -> c_17()
          msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
          msplit#2#(nil(),@x1) -> c_19()
          msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20()
        Weak DPs
          #cklt#(#EQ()) -> c_21()
          #cklt#(#GT()) -> c_22()
          #cklt#(#LT()) -> c_23()
          #compare#(#0(),#0()) -> c_24()
          #compare#(#0(),#neg(@y)) -> c_25()
          #compare#(#0(),#pos(@y)) -> c_26()
          #compare#(#0(),#s(@y)) -> c_27()
          #compare#(#neg(@x),#0()) -> c_28()
          #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x))
          #compare#(#neg(@x),#pos(@y)) -> c_30()
          #compare#(#pos(@x),#0()) -> c_31()
          #compare#(#pos(@x),#neg(@y)) -> c_32()
          #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y))
          #compare#(#s(@x),#0()) -> c_34()
          #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y))
        
        and mark the set of starting terms.
* Step 3: PredecessorEstimation WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            #less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y))
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#1#(nil(),@l2) -> c_4()
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
            merge#2#(nil(),@x,@xs) -> c_6()
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#1#(nil()) -> c_11()
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#2#(nil(),@x1) -> c_13()
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#1#(nil()) -> c_17()
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
            msplit#2#(nil(),@x1) -> c_19()
            msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20()
        - Weak DPs:
            #cklt#(#EQ()) -> c_21()
            #cklt#(#GT()) -> c_22()
            #cklt#(#LT()) -> c_23()
            #compare#(#0(),#0()) -> c_24()
            #compare#(#0(),#neg(@y)) -> c_25()
            #compare#(#0(),#pos(@y)) -> c_26()
            #compare#(#0(),#s(@y)) -> c_27()
            #compare#(#neg(@x),#0()) -> c_28()
            #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x))
            #compare#(#neg(@x),#pos(@y)) -> c_30()
            #compare#(#pos(@x),#0()) -> c_31()
            #compare#(#pos(@x),#neg(@y)) -> c_32()
            #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y))
            #compare#(#s(@x),#0()) -> c_34()
            #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/2,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/2,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimation {onSelection = all simple predecessor estimation selector}
    + Details:
        We estimate the number of application of
          {1,4,6,11,13,17,19,20}
        by application of
          Pre({1,4,6,11,13,17,19,20}) = {2,3,5,9,10,15,16,18}.
        Here rules are labelled as follows:
          1: #less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y))
          2: merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          3: merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          4: merge#1#(nil(),@l2) -> c_4()
          5: merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
          6: merge#2#(nil(),@x,@xs) -> c_6()
          7: merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
          8: merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          9: mergesort#(@l) -> c_9(mergesort#1#(@l))
          10: mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          11: mergesort#1#(nil()) -> c_11()
          12: mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
          13: mergesort#2#(nil(),@x1) -> c_13()
          14: mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
          15: msplit#(@l) -> c_15(msplit#1#(@l))
          16: msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          17: msplit#1#(nil()) -> c_17()
          18: msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
          19: msplit#2#(nil(),@x1) -> c_19()
          20: msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20()
          21: #cklt#(#EQ()) -> c_21()
          22: #cklt#(#GT()) -> c_22()
          23: #cklt#(#LT()) -> c_23()
          24: #compare#(#0(),#0()) -> c_24()
          25: #compare#(#0(),#neg(@y)) -> c_25()
          26: #compare#(#0(),#pos(@y)) -> c_26()
          27: #compare#(#0(),#s(@y)) -> c_27()
          28: #compare#(#neg(@x),#0()) -> c_28()
          29: #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x))
          30: #compare#(#neg(@x),#pos(@y)) -> c_30()
          31: #compare#(#pos(@x),#0()) -> c_31()
          32: #compare#(#pos(@x),#neg(@y)) -> c_32()
          33: #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y))
          34: #compare#(#s(@x),#0()) -> c_34()
          35: #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y))
* Step 4: RemoveWeakSuffixes WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
        - Weak DPs:
            #cklt#(#EQ()) -> c_21()
            #cklt#(#GT()) -> c_22()
            #cklt#(#LT()) -> c_23()
            #compare#(#0(),#0()) -> c_24()
            #compare#(#0(),#neg(@y)) -> c_25()
            #compare#(#0(),#pos(@y)) -> c_26()
            #compare#(#0(),#s(@y)) -> c_27()
            #compare#(#neg(@x),#0()) -> c_28()
            #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x))
            #compare#(#neg(@x),#pos(@y)) -> c_30()
            #compare#(#pos(@x),#0()) -> c_31()
            #compare#(#pos(@x),#neg(@y)) -> c_32()
            #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y))
            #compare#(#s(@x),#0()) -> c_34()
            #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y))
            #less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y))
            merge#1#(nil(),@l2) -> c_4()
            merge#2#(nil(),@x,@xs) -> c_6()
            mergesort#1#(nil()) -> c_11()
            mergesort#2#(nil(),@x1) -> c_13()
            msplit#1#(nil()) -> c_17()
            msplit#2#(nil(),@x1) -> c_19()
            msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20()
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/2,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/2,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:S:merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
             -->_1 merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs)):2
             -->_1 merge#1#(nil(),@l2) -> c_4():29
          
          2:S:merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
             -->_1 merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y)):3
             -->_1 merge#2#(nil(),@x,@xs) -> c_6():30
          
          3:S:merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
             -->_2 #less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y)):28
             -->_1 merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys))):5
             -->_1 merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys)):4
          
          4:S:merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          5:S:merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          6:S:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):7
             -->_1 mergesort#1#(nil()) -> c_11():31
          
          7:S:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):8
             -->_1 mergesort#2#(nil(),@x1) -> c_13():32
          
          8:S:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):10
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):9
          
          9:S:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          10:S:msplit#(@l) -> c_15(msplit#1#(@l))
             -->_1 msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1)):11
             -->_1 msplit#1#(nil()) -> c_17():33
          
          11:S:msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
             -->_1 msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs')):12
             -->_1 msplit#2#(nil(),@x1) -> c_19():34
          
          12:S:msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
             -->_1 msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20():35
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):10
          
          13:W:#cklt#(#EQ()) -> c_21()
             
          
          14:W:#cklt#(#GT()) -> c_22()
             
          
          15:W:#cklt#(#LT()) -> c_23()
             
          
          16:W:#compare#(#0(),#0()) -> c_24()
             
          
          17:W:#compare#(#0(),#neg(@y)) -> c_25()
             
          
          18:W:#compare#(#0(),#pos(@y)) -> c_26()
             
          
          19:W:#compare#(#0(),#s(@y)) -> c_27()
             
          
          20:W:#compare#(#neg(@x),#0()) -> c_28()
             
          
          21:W:#compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x))
             -->_1 #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y)):27
             -->_1 #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y)):25
             -->_1 #compare#(#s(@x),#0()) -> c_34():26
             -->_1 #compare#(#pos(@x),#neg(@y)) -> c_32():24
             -->_1 #compare#(#pos(@x),#0()) -> c_31():23
             -->_1 #compare#(#neg(@x),#pos(@y)) -> c_30():22
             -->_1 #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x)):21
             -->_1 #compare#(#neg(@x),#0()) -> c_28():20
             -->_1 #compare#(#0(),#s(@y)) -> c_27():19
             -->_1 #compare#(#0(),#pos(@y)) -> c_26():18
             -->_1 #compare#(#0(),#neg(@y)) -> c_25():17
             -->_1 #compare#(#0(),#0()) -> c_24():16
          
          22:W:#compare#(#neg(@x),#pos(@y)) -> c_30()
             
          
          23:W:#compare#(#pos(@x),#0()) -> c_31()
             
          
          24:W:#compare#(#pos(@x),#neg(@y)) -> c_32()
             
          
          25:W:#compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y))
             -->_1 #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y)):27
             -->_1 #compare#(#s(@x),#0()) -> c_34():26
             -->_1 #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y)):25
             -->_1 #compare#(#pos(@x),#neg(@y)) -> c_32():24
             -->_1 #compare#(#pos(@x),#0()) -> c_31():23
             -->_1 #compare#(#neg(@x),#pos(@y)) -> c_30():22
             -->_1 #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x)):21
             -->_1 #compare#(#neg(@x),#0()) -> c_28():20
             -->_1 #compare#(#0(),#s(@y)) -> c_27():19
             -->_1 #compare#(#0(),#pos(@y)) -> c_26():18
             -->_1 #compare#(#0(),#neg(@y)) -> c_25():17
             -->_1 #compare#(#0(),#0()) -> c_24():16
          
          26:W:#compare#(#s(@x),#0()) -> c_34()
             
          
          27:W:#compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y))
             -->_1 #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y)):27
             -->_1 #compare#(#s(@x),#0()) -> c_34():26
             -->_1 #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y)):25
             -->_1 #compare#(#pos(@x),#neg(@y)) -> c_32():24
             -->_1 #compare#(#pos(@x),#0()) -> c_31():23
             -->_1 #compare#(#neg(@x),#pos(@y)) -> c_30():22
             -->_1 #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x)):21
             -->_1 #compare#(#neg(@x),#0()) -> c_28():20
             -->_1 #compare#(#0(),#s(@y)) -> c_27():19
             -->_1 #compare#(#0(),#pos(@y)) -> c_26():18
             -->_1 #compare#(#0(),#neg(@y)) -> c_25():17
             -->_1 #compare#(#0(),#0()) -> c_24():16
          
          28:W:#less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y))
             -->_2 #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y)):27
             -->_2 #compare#(#s(@x),#0()) -> c_34():26
             -->_2 #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y)):25
             -->_2 #compare#(#pos(@x),#neg(@y)) -> c_32():24
             -->_2 #compare#(#pos(@x),#0()) -> c_31():23
             -->_2 #compare#(#neg(@x),#pos(@y)) -> c_30():22
             -->_2 #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x)):21
             -->_2 #compare#(#neg(@x),#0()) -> c_28():20
             -->_2 #compare#(#0(),#s(@y)) -> c_27():19
             -->_2 #compare#(#0(),#pos(@y)) -> c_26():18
             -->_2 #compare#(#0(),#neg(@y)) -> c_25():17
             -->_2 #compare#(#0(),#0()) -> c_24():16
             -->_1 #cklt#(#LT()) -> c_23():15
             -->_1 #cklt#(#GT()) -> c_22():14
             -->_1 #cklt#(#EQ()) -> c_21():13
          
          29:W:merge#1#(nil(),@l2) -> c_4()
             
          
          30:W:merge#2#(nil(),@x,@xs) -> c_6()
             
          
          31:W:mergesort#1#(nil()) -> c_11()
             
          
          32:W:mergesort#2#(nil(),@x1) -> c_13()
             
          
          33:W:msplit#1#(nil()) -> c_17()
             
          
          34:W:msplit#2#(nil(),@x1) -> c_19()
             
          
          35:W:msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20()
             
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          31: mergesort#1#(nil()) -> c_11()
          32: mergesort#2#(nil(),@x1) -> c_13()
          33: msplit#1#(nil()) -> c_17()
          34: msplit#2#(nil(),@x1) -> c_19()
          35: msplit#3#(tuple#2(@l1,@l2),@x1,@x2) -> c_20()
          29: merge#1#(nil(),@l2) -> c_4()
          30: merge#2#(nil(),@x,@xs) -> c_6()
          28: #less#(@x,@y) -> c_1(#cklt#(#compare(@x,@y)),#compare#(@x,@y))
          13: #cklt#(#EQ()) -> c_21()
          14: #cklt#(#GT()) -> c_22()
          15: #cklt#(#LT()) -> c_23()
          27: #compare#(#s(@x),#s(@y)) -> c_35(#compare#(@x,@y))
          25: #compare#(#pos(@x),#pos(@y)) -> c_33(#compare#(@x,@y))
          21: #compare#(#neg(@x),#neg(@y)) -> c_29(#compare#(@y,@x))
          16: #compare#(#0(),#0()) -> c_24()
          17: #compare#(#0(),#neg(@y)) -> c_25()
          18: #compare#(#0(),#pos(@y)) -> c_26()
          19: #compare#(#0(),#s(@y)) -> c_27()
          20: #compare#(#neg(@x),#0()) -> c_28()
          22: #compare#(#neg(@x),#pos(@y)) -> c_30()
          23: #compare#(#pos(@x),#0()) -> c_31()
          24: #compare#(#pos(@x),#neg(@y)) -> c_32()
          26: #compare#(#s(@x),#0()) -> c_34()
* Step 5: SimplifyRHS WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/2,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/2,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        SimplifyRHS
    + Details:
        Consider the dependency graph
          1:S:merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
             -->_1 merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs)):2
          
          2:S:merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
             -->_1 merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y)):3
          
          3:S:merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys),#less#(@x,@y))
             -->_1 merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys))):5
             -->_1 merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys)):4
          
          4:S:merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          5:S:merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          6:S:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):7
          
          7:S:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):8
          
          8:S:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):10
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):9
          
          9:S:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          10:S:msplit#(@l) -> c_15(msplit#1#(@l))
             -->_1 msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1)):11
          
          11:S:msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
             -->_1 msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs')):12
          
          12:S:msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#3#(msplit(@xs'),@x1,@x2),msplit#(@xs'))
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):10
          
        Due to missing edges in the depndency graph, the right-hand sides of following rules could be simplified:
          merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
* Step 6: Decompose WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Decompose {onSelection = all cycle independent sub-graph, withBound = RelativeAdd}
    + Details:
        We analyse the complexity of following sub-problems (R) and (S).
        Problem (S) is obtained from the input problem by shifting strict rules from (R) into the weak component.
        
        Problem (R)
          - Strict DPs:
              merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
              merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
              merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
              merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
              merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          - Weak DPs:
              mergesort#(@l) -> c_9(mergesort#1#(@l))
              mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
              mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
              mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
              msplit#(@l) -> c_15(msplit#1#(@l))
              msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
              msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
          - Weak TRS:
              #cklt(#EQ()) -> #false()
              #cklt(#GT()) -> #false()
              #cklt(#LT()) -> #true()
              #compare(#0(),#0()) -> #EQ()
              #compare(#0(),#neg(@y)) -> #GT()
              #compare(#0(),#pos(@y)) -> #LT()
              #compare(#0(),#s(@y)) -> #LT()
              #compare(#neg(@x),#0()) -> #LT()
              #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
              #compare(#neg(@x),#pos(@y)) -> #LT()
              #compare(#pos(@x),#0()) -> #GT()
              #compare(#pos(@x),#neg(@y)) -> #GT()
              #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
              #compare(#s(@x),#0()) -> #GT()
              #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
              #less(@x,@y) -> #cklt(#compare(@x,@y))
              merge(@l1,@l2) -> merge#1(@l1,@l2)
              merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
              merge#1(nil(),@l2) -> @l2
              merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
              merge#2(nil(),@x,@xs) -> ::(@x,@xs)
              merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
              merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
              mergesort(@l) -> mergesort#1(@l)
              mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
              mergesort#1(nil()) -> nil()
              mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
              mergesort#2(nil(),@x1) -> ::(@x1,nil())
              mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
              msplit(@l) -> msplit#1(@l)
              msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
              msplit#1(nil()) -> tuple#2(nil(),nil())
              msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
              msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
              msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
          - Signature:
              {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
              ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
              ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
              ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0
              ,tuple#2/2,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1
              ,c_16/1,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0
              ,c_31/0,c_32/0,c_33/1,c_34/0,c_35/1}
          - Obligation:
              innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#
              ,merge#3#,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
              ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
        
        Problem (S)
          - Strict DPs:
              mergesort#(@l) -> c_9(mergesort#1#(@l))
              mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
              mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
              mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
              msplit#(@l) -> c_15(msplit#1#(@l))
              msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
              msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
          - Weak DPs:
              merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
              merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
              merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
              merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
              merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          - Weak TRS:
              #cklt(#EQ()) -> #false()
              #cklt(#GT()) -> #false()
              #cklt(#LT()) -> #true()
              #compare(#0(),#0()) -> #EQ()
              #compare(#0(),#neg(@y)) -> #GT()
              #compare(#0(),#pos(@y)) -> #LT()
              #compare(#0(),#s(@y)) -> #LT()
              #compare(#neg(@x),#0()) -> #LT()
              #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
              #compare(#neg(@x),#pos(@y)) -> #LT()
              #compare(#pos(@x),#0()) -> #GT()
              #compare(#pos(@x),#neg(@y)) -> #GT()
              #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
              #compare(#s(@x),#0()) -> #GT()
              #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
              #less(@x,@y) -> #cklt(#compare(@x,@y))
              merge(@l1,@l2) -> merge#1(@l1,@l2)
              merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
              merge#1(nil(),@l2) -> @l2
              merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
              merge#2(nil(),@x,@xs) -> ::(@x,@xs)
              merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
              merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
              mergesort(@l) -> mergesort#1(@l)
              mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
              mergesort#1(nil()) -> nil()
              mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
              mergesort#2(nil(),@x1) -> ::(@x1,nil())
              mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
              msplit(@l) -> msplit#1(@l)
              msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
              msplit#1(nil()) -> tuple#2(nil(),nil())
              msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
              msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
              msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
          - Signature:
              {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
              ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
              ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
              ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0
              ,tuple#2/2,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1
              ,c_16/1,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0
              ,c_31/0,c_32/0,c_33/1,c_34/0,c_35/1}
          - Obligation:
              innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#
              ,merge#3#,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
              ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
** Step 6.a:1: RemoveWeakSuffixes WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:S:merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
             -->_1 merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs)):2
          
          2:S:merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
             -->_1 merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)):3
          
          3:S:merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
             -->_1 merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys))):5
             -->_1 merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys)):4
          
          4:S:merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          5:S:merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          6:W:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):7
          
          7:W:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):8
          
          8:W:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):10
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):9
          
          9:W:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
          
          10:W:msplit#(@l) -> c_15(msplit#1#(@l))
             -->_1 msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1)):11
          
          11:W:msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
             -->_1 msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs')):12
          
          12:W:msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
             -->_1 msplit#(@l) -> c_15(msplit#1#(@l)):10
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          10: msplit#(@l) -> c_15(msplit#1#(@l))
          12: msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
          11: msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
** Step 6.a:2: SimplifyRHS WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        SimplifyRHS
    + Details:
        Consider the dependency graph
          1:S:merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
             -->_1 merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs)):2
          
          2:S:merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
             -->_1 merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)):3
          
          3:S:merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
             -->_1 merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys))):5
             -->_1 merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys)):4
          
          4:S:merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          5:S:merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          6:W:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):7
          
          7:W:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):8
          
          8:W:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):9
          
          9:W:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):6
          
        Due to missing edges in the depndency graph, the right-hand sides of following rules could be simplified:
          mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
** Step 6.a:3: DecomposeDG WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        DecomposeDG {onSelection = all below first cut in WDG, onUpper = Just someStrategy, onLower = Nothing}
    + Details:
        We decompose the input problem according to the dependency graph into the upper component
          mergesort#(@l) -> c_9(mergesort#1#(@l))
          mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
          mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                ,mergesort#(@l1)
                                                ,mergesort#(@l2))
        and a lower component
          merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
          merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        Further, following extension rules are added to the lower component.
          mergesort#(@l) -> mergesort#1#(@l)
          mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
          mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
*** Step 6.a:3.a:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          1: mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                   ,mergesort#(@l1)
                                                   ,mergesort#(@l2))
          
        Consider the set of all dependency pairs
          1: mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                   ,mergesort#(@l1)
                                                   ,mergesort#(@l2))
          2: mergesort#(@l) -> c_9(mergesort#1#(@l))
          3: mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          4: mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
        Processor NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}induces the complexity certificateTIME (?,O(n^1))
        SPACE(?,?)on application of the dependency pairs
          {1}
        These cover all (indirect) predecessors of dependency pairs
          {1,2,3,4}
        their number of applications is equally bounded.
        The dependency pairs are shifted into the weak component.
**** Step 6.a:3.a:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation (containing no more than 1 non-zero interpretation-entries in the diagonal of the component-wise maxima):
        The following argument positions are considered usable:
          uargs(c_9) = {1},
          uargs(c_10) = {1},
          uargs(c_12) = {1},
          uargs(c_14) = {1,2,3}
        
        Following symbols are considered usable:
          {msplit,msplit#1,msplit#2,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#
          ,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [0]                                       
                            [0]                                       
                            [1]                                       
                   p(#EQ) = [1]                                       
                            [1]                                       
                            [1]                                       
                   p(#GT) = [1]                                       
                            [0]                                       
                            [0]                                       
                   p(#LT) = [0]                                       
                            [0]                                       
                            [0]                                       
                 p(#cklt) = [1 1 0]      [0]                          
                            [1 0 1] x1 + [1]                          
                            [1 0 0]      [1]                          
              p(#compare) = [0 0 0]      [0 1 0]      [0]             
                            [1 1 1] x1 + [0 0 1] x2 + [0]             
                            [1 1 0]      [1 0 0]      [0]             
                p(#false) = [0]                                       
                            [1]                                       
                            [0]                                       
                 p(#less) = [0 0 0]      [1 0 0]      [0]             
                            [0 1 0] x1 + [0 0 1] x2 + [1]             
                            [0 0 0]      [1 1 1]      [1]             
                  p(#neg) = [0]                                       
                            [1]                                       
                            [1]                                       
                  p(#pos) = [0]                                       
                            [0]                                       
                            [0]                                       
                    p(#s) = [0 0 1]      [1]                          
                            [0 0 1] x1 + [0]                          
                            [0 0 0]      [1]                          
                 p(#true) = [0]                                       
                            [1]                                       
                            [0]                                       
                    p(::) = [0 1 0]      [0]                          
                            [0 1 1] x2 + [0]                          
                            [0 0 0]      [1]                          
                 p(merge) = [0 0 0]      [1 1 1]      [0]             
                            [0 0 0] x1 + [0 0 1] x2 + [0]             
                            [0 0 1]      [0 0 0]      [0]             
               p(merge#1) = [0 0 0]      [0]                          
                            [0 1 0] x1 + [0]                          
                            [0 0 0]      [0]                          
               p(merge#2) = [0 0 1]      [0]                          
                            [0 0 0] x1 + [0]                          
                            [0 0 0]      [0]                          
               p(merge#3) = [0 0 0]      [0 0 0]      [1 1 0]      [1]
                            [1 0 1] x1 + [0 0 0] x2 + [0 0 0] x4 + [1]
                            [0 1 1]      [0 1 0]      [0 0 0]      [1]
             p(mergesort) = [1 0 0]      [0]                          
                            [0 1 0] x1 + [0]                          
                            [0 0 1]      [0]                          
           p(mergesort#1) = [0 0 1]      [0]                          
                            [0 0 1] x1 + [1]                          
                            [0 0 0]      [1]                          
           p(mergesort#2) = [0 0 1]      [0]                          
                            [0 1 1] x1 + [0]                          
                            [0 1 0]      [0]                          
           p(mergesort#3) = [0 0 0]      [0]                          
                            [1 0 0] x1 + [0]                          
                            [0 0 1]      [0]                          
                p(msplit) = [1 0 0]      [0]                          
                            [0 1 1] x1 + [0]                          
                            [0 0 0]      [1]                          
              p(msplit#1) = [1 0 0]      [0]                          
                            [0 1 1] x1 + [0]                          
                            [0 0 0]      [1]                          
              p(msplit#2) = [0 1 0]      [0]                          
                            [0 1 1] x1 + [1]                          
                            [0 0 0]      [1]                          
              p(msplit#3) = [0 1 0]      [0]                          
                            [0 1 1] x1 + [1]                          
                            [0 0 0]      [1]                          
                   p(nil) = [0]                                       
                            [0]                                       
                            [0]                                       
               p(tuple#2) = [0 1 0]      [0 1 0]      [0]             
                            [0 1 1] x1 + [0 1 1] x2 + [0]             
                            [0 0 0]      [0 0 0]      [1]             
                p(#cklt#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(#compare#) = [0]                                       
                            [0]                                       
                            [0]                                       
                p(#less#) = [0]                                       
                            [0]                                       
                            [0]                                       
                p(merge#) = [0]                                       
                            [1]                                       
                            [0]                                       
              p(merge#1#) = [0]                                       
                            [0]                                       
                            [0]                                       
              p(merge#2#) = [0]                                       
                            [0]                                       
                            [0]                                       
              p(merge#3#) = [0]                                       
                            [0]                                       
                            [0]                                       
            p(mergesort#) = [0 1 0]      [0]                          
                            [1 0 0] x1 + [0]                          
                            [0 0 0]      [0]                          
          p(mergesort#1#) = [0 1 0]      [0]                          
                            [0 0 1] x1 + [1]                          
                            [1 0 0]      [0]                          
          p(mergesort#2#) = [0 1 1]      [0 0 0]      [0]             
                            [0 0 0] x1 + [1 0 1] x2 + [1]             
                            [0 0 1]      [1 0 1]      [1]             
          p(mergesort#3#) = [1 0 1]      [0]                          
                            [0 0 1] x1 + [1]                          
                            [0 0 0]      [1]                          
               p(msplit#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(msplit#1#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(msplit#2#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(msplit#3#) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_1) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_2) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_3) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_4) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_5) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_6) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_7) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_8) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_9) = [1 0 0]      [0]                          
                            [0 0 1] x1 + [0]                          
                            [0 0 0]      [0]                          
                  p(c_10) = [1 0 0]      [0]                          
                            [0 0 0] x1 + [0]                          
                            [0 0 0]      [0]                          
                  p(c_11) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_12) = [1 0 0]      [0]                          
                            [0 0 0] x1 + [0]                          
                            [0 0 1]      [0]                          
                  p(c_13) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_14) = [1 0 0]      [1 0 0]      [1 0 0]      [0]
                            [0 1 0] x1 + [0 0 0] x2 + [0 0 0] x3 + [1]
                            [0 1 0]      [0 0 0]      [0 0 0]      [0]
                  p(c_15) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_16) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_17) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_18) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_19) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_20) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_21) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_22) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_23) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_24) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_25) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_26) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_27) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_28) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_29) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_30) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_31) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_32) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_33) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_34) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_35) = [0]                                       
                            [0]                                       
                            [0]                                       
        
        Following rules are strictly oriented:
        mergesort#3#(tuple#2(@l1,@l2)) = [0 1 0]       [0 1 0]       [1]                                            
                                         [0 0 0] @l1 + [0 0 0] @l2 + [2]                                            
                                         [0 0 0]       [0 0 0]       [1]                                            
                                       > [0 1 0]       [0 1 0]       [0]                                            
                                         [0 0 0] @l1 + [0 0 0] @l2 + [2]                                            
                                         [0 0 0]       [0 0 0]       [1]                                            
                                       = c_14(merge#(mergesort(@l1),mergesort(@l2)),mergesort#(@l1),mergesort#(@l2))
        
        
        Following rules are (at-least) weakly oriented:
                            mergesort#(@l) =  [0 1 0]      [0]                                
                                              [1 0 0] @l + [0]                                
                                              [0 0 0]      [0]                                
                                           >= [0 1 0]      [0]                                
                                              [1 0 0] @l + [0]                                
                                              [0 0 0]      [0]                                
                                           =  c_9(mergesort#1#(@l))                           
        
                 mergesort#1#(::(@x1,@xs)) =  [0 1 1]       [0]                               
                                              [0 0 0] @xs + [2]                               
                                              [0 1 0]       [0]                               
                                           >= [0 1 1]       [0]                               
                                              [0 0 0] @xs + [0]                               
                                              [0 0 0]       [0]                               
                                           =  c_10(mergesort#2#(@xs,@x1))                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [0 0 0]       [0 1 1]        [1]                
                                              [1 0 1] @x1 + [0 0 0] @xs' + [1]                
                                              [1 0 1]       [0 0 0]        [2]                
                                           >= [0 1 1]        [1]                              
                                              [0 0 0] @xs' + [0]                              
                                              [0 0 0]        [1]                              
                                           =  c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
        
                                msplit(@l) =  [1 0 0]      [0]                                
                                              [0 1 1] @l + [0]                                
                                              [0 0 0]      [1]                                
                                           >= [1 0 0]      [0]                                
                                              [0 1 1] @l + [0]                                
                                              [0 0 0]      [1]                                
                                           =  msplit#1(@l)                                    
        
                     msplit#1(::(@x1,@xs)) =  [0 1 0]       [0]                               
                                              [0 1 1] @xs + [1]                               
                                              [0 0 0]       [1]                               
                                           >= [0 1 0]       [0]                               
                                              [0 1 1] @xs + [1]                               
                                              [0 0 0]       [1]                               
                                           =  msplit#2(@xs,@x1)                               
        
                           msplit#1(nil()) =  [0]                                             
                                              [0]                                             
                                              [1]                                             
                                           >= [0]                                             
                                              [0]                                             
                                              [1]                                             
                                           =  tuple#2(nil(),nil())                            
        
                msplit#2(::(@x2,@xs'),@x1) =  [0 1 1]        [0]                              
                                              [0 1 1] @xs' + [2]                              
                                              [0 0 0]        [1]                              
                                           >= [0 1 1]        [0]                              
                                              [0 1 1] @xs' + [2]                              
                                              [0 0 0]        [1]                              
                                           =  msplit#3(msplit(@xs'),@x1,@x2)                  
        
                       msplit#2(nil(),@x1) =  [0]                                             
                                              [1]                                             
                                              [1]                                             
                                           >= [0]                                             
                                              [1]                                             
                                              [1]                                             
                                           =  tuple#2(::(@x1,nil()),nil())                    
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [0 1 1]       [0 1 1]       [0]                 
                                              [0 1 1] @l1 + [0 1 1] @l2 + [2]                 
                                              [0 0 0]       [0 0 0]       [1]                 
                                           >= [0 1 1]       [0 1 1]       [0]                 
                                              [0 1 1] @l1 + [0 1 1] @l2 + [2]                 
                                              [0 0 0]       [0 0 0]       [1]                 
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))                
        
**** Step 6.a:3.a:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

**** Step 6.a:3.a:1.b:1: RemoveWeakSuffixes WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:W:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):2
          
          2:W:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))):3
          
          3:W:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):4
          
          4:W:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          1: mergesort#(@l) -> c_9(mergesort#1#(@l))
          4: mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                   ,mergesort#(@l1)
                                                   ,mergesort#(@l2))
          3: mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))))
          2: mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
**** Step 6.a:3.a:1.b:2: EmptyProcessor WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        EmptyProcessor
    + Details:
        The problem is already closed. The intended complexity is O(1).

*** Step 6.a:3.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          5: merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          
        The strictly oriented rules are moved into the weak component.
**** Step 6.a:3.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_2) = {1},
          uargs(c_3) = {1},
          uargs(c_5) = {1},
          uargs(c_7) = {1},
          uargs(c_8) = {1}
        
        Following symbols are considered usable:
          {merge,merge#1,merge#2,merge#3,mergesort,mergesort#1,mergesort#2,mergesort#3,msplit,msplit#1,msplit#2
          ,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#,mergesort#1#,mergesort#2#
          ,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [0]                  
                   p(#EQ) = [0]                  
                   p(#GT) = [0]                  
                   p(#LT) = [0]                  
                 p(#cklt) = [7] x1 + [0]         
              p(#compare) = [2] x1 + [2] x2 + [2]
                p(#false) = [0]                  
                 p(#less) = [0]                  
                  p(#neg) = [0]                  
                  p(#pos) = [1] x1 + [0]         
                    p(#s) = [0]                  
                 p(#true) = [0]                  
                    p(::) = [1] x2 + [1]         
                 p(merge) = [1] x1 + [1] x2 + [0]
               p(merge#1) = [1] x1 + [1] x2 + [0]
               p(merge#2) = [1] x1 + [1] x3 + [1]
               p(merge#3) = [1] x3 + [1] x5 + [2]
             p(mergesort) = [4] x1 + [0]         
           p(mergesort#1) = [4] x1 + [0]         
           p(mergesort#2) = [4] x1 + [4]         
           p(mergesort#3) = [4] x1 + [0]         
                p(msplit) = [1] x1 + [0]         
              p(msplit#1) = [1] x1 + [0]         
              p(msplit#2) = [1] x1 + [1]         
              p(msplit#3) = [1] x1 + [2]         
                   p(nil) = [0]                  
               p(tuple#2) = [1] x1 + [1] x2 + [0]
                p(#cklt#) = [1]                  
             p(#compare#) = [0]                  
                p(#less#) = [0]                  
                p(merge#) = [1] x1 + [0]         
              p(merge#1#) = [1] x1 + [0]         
              p(merge#2#) = [1] x3 + [1]         
              p(merge#3#) = [1] x3 + [1]         
            p(mergesort#) = [4] x1 + [0]         
          p(mergesort#1#) = [4] x1 + [0]         
          p(mergesort#2#) = [4] x1 + [4]         
          p(mergesort#3#) = [4] x1 + [0]         
               p(msplit#) = [4]                  
             p(msplit#1#) = [1] x1 + [2]         
             p(msplit#2#) = [1] x2 + [0]         
             p(msplit#3#) = [1] x2 + [1] x3 + [0]
                   p(c_1) = [2]                  
                   p(c_2) = [1] x1 + [0]         
                   p(c_3) = [1] x1 + [0]         
                   p(c_4) = [4]                  
                   p(c_5) = [1] x1 + [0]         
                   p(c_6) = [0]                  
                   p(c_7) = [1] x1 + [0]         
                   p(c_8) = [1] x1 + [0]         
                   p(c_9) = [2]                  
                  p(c_10) = [2]                  
                  p(c_11) = [1]                  
                  p(c_12) = [2] x1 + [0]         
                  p(c_13) = [2]                  
                  p(c_14) = [2] x1 + [4] x3 + [0]
                  p(c_15) = [1] x1 + [1]         
                  p(c_16) = [2] x1 + [4]         
                  p(c_17) = [1]                  
                  p(c_18) = [1] x1 + [0]         
                  p(c_19) = [0]                  
                  p(c_20) = [0]                  
                  p(c_21) = [1]                  
                  p(c_22) = [0]                  
                  p(c_23) = [4]                  
                  p(c_24) = [1]                  
                  p(c_25) = [2]                  
                  p(c_26) = [0]                  
                  p(c_27) = [1]                  
                  p(c_28) = [2]                  
                  p(c_29) = [1] x1 + [1]         
                  p(c_30) = [0]                  
                  p(c_31) = [1]                  
                  p(c_32) = [0]                  
                  p(c_33) = [2]                  
                  p(c_34) = [1]                  
                  p(c_35) = [1]                  
        
        Following rules are strictly oriented:
        merge#3#(#true(),@x,@xs,@y,@ys) = [1] @xs + [1]              
                                        > [1] @xs + [0]              
                                        = c_8(merge#(@xs,::(@y,@ys)))
        
        
        Following rules are (at-least) weakly oriented:
                           merge#(@l1,@l2) =  [1] @l1 + [0]                             
                                           >= [1] @l1 + [0]                             
                                           =  c_2(merge#1#(@l1,@l2))                    
        
                  merge#1#(::(@x,@xs),@l2) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  c_3(merge#2#(@l2,@x,@xs))                 
        
               merge#2#(::(@y,@ys),@x,@xs) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)) 
        
          merge#3#(#false(),@x,@xs,@y,@ys) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  c_7(merge#(::(@x,@xs),@ys))               
        
                            mergesort#(@l) =  [4] @l + [0]                              
                                           >= [4] @l + [0]                              
                                           =  mergesort#1#(@l)                          
        
                 mergesort#1#(::(@x1,@xs)) =  [4] @xs + [4]                             
                                           >= [4] @xs + [4]                             
                                           =  mergesort#2#(@xs,@x1)                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [4] @xs' + [8]                            
                                           >= [4] @xs' + [8]                            
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l1 + [0]                             
                                           =  merge#(mergesort(@l1),mergesort(@l2))     
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l1 + [0]                             
                                           =  mergesort#(@l1)                           
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l2 + [0]                             
                                           =  mergesort#(@l2)                           
        
                            merge(@l1,@l2) =  [1] @l1 + [1] @l2 + [0]                   
                                           >= [1] @l1 + [1] @l2 + [0]                   
                                           =  merge#1(@l1,@l2)                          
        
                   merge#1(::(@x,@xs),@l2) =  [1] @l2 + [1] @xs + [1]                   
                                           >= [1] @l2 + [1] @xs + [1]                   
                                           =  merge#2(@l2,@x,@xs)                       
        
                        merge#1(nil(),@l2) =  [1] @l2 + [0]                             
                                           >= [1] @l2 + [0]                             
                                           =  @l2                                       
        
                merge#2(::(@y,@ys),@x,@xs) =  [1] @xs + [1] @ys + [2]                   
                                           >= [1] @xs + [1] @ys + [2]                   
                                           =  merge#3(#less(@x,@y),@x,@xs,@y,@ys)       
        
                     merge#2(nil(),@x,@xs) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  ::(@x,@xs)                                
        
           merge#3(#false(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [2]                   
                                           >= [1] @xs + [1] @ys + [2]                   
                                           =  ::(@y,merge(::(@x,@xs),@ys))              
        
            merge#3(#true(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [2]                   
                                           >= [1] @xs + [1] @ys + [2]                   
                                           =  ::(@x,merge(@xs,::(@y,@ys)))              
        
                             mergesort(@l) =  [4] @l + [0]                              
                                           >= [4] @l + [0]                              
                                           =  mergesort#1(@l)                           
        
                  mergesort#1(::(@x1,@xs)) =  [4] @xs + [4]                             
                                           >= [4] @xs + [4]                             
                                           =  mergesort#2(@xs,@x1)                      
        
                        mergesort#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  nil()                                     
        
             mergesort#2(::(@x2,@xs'),@x1) =  [4] @xs' + [8]                            
                                           >= [4] @xs' + [8]                            
                                           =  mergesort#3(msplit(::(@x1,::(@x2,@xs')))) 
        
                    mergesort#2(nil(),@x1) =  [4]                                       
                                           >= [1]                                       
                                           =  ::(@x1,nil())                             
        
             mergesort#3(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l1 + [4] @l2 + [0]                   
                                           =  merge(mergesort(@l1),mergesort(@l2))      
        
                                msplit(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  msplit#1(@l)                              
        
                     msplit#1(::(@x1,@xs)) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  msplit#2(@xs,@x1)                         
        
                           msplit#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  tuple#2(nil(),nil())                      
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @xs' + [2]                            
                                           >= [1] @xs' + [2]                            
                                           =  msplit#3(msplit(@xs'),@x1,@x2)            
        
                       msplit#2(nil(),@x1) =  [1]                                       
                                           >= [1]                                       
                                           =  tuple#2(::(@x1,nil()),nil())              
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l1 + [1] @l2 + [2]                   
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))          
        
**** Step 6.a:3.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
        - Weak DPs:
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

**** Step 6.a:3.b:1.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
        - Weak DPs:
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          4: merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
          
        The strictly oriented rules are moved into the weak component.
***** Step 6.a:3.b:1.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
        - Weak DPs:
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_2) = {1},
          uargs(c_3) = {1},
          uargs(c_5) = {1},
          uargs(c_7) = {1},
          uargs(c_8) = {1}
        
        Following symbols are considered usable:
          {merge,merge#1,merge#2,merge#3,mergesort,mergesort#1,mergesort#2,mergesort#3,msplit,msplit#1,msplit#2
          ,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#,mergesort#1#,mergesort#2#
          ,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [0]                           
                   p(#EQ) = [4]                           
                   p(#GT) = [5]                           
                   p(#LT) = [0]                           
                 p(#cklt) = [2] x1 + [0]                  
              p(#compare) = [7] x1 + [4] x2 + [7]         
                p(#false) = [0]                           
                 p(#less) = [0]                           
                  p(#neg) = [0]                           
                  p(#pos) = [0]                           
                    p(#s) = [1] x1 + [0]                  
                 p(#true) = [0]                           
                    p(::) = [1] x2 + [2]                  
                 p(merge) = [1] x1 + [1] x2 + [0]         
               p(merge#1) = [1] x1 + [1] x2 + [0]         
               p(merge#2) = [1] x1 + [1] x3 + [2]         
               p(merge#3) = [1] x3 + [1] x5 + [4]         
             p(mergesort) = [1] x1 + [0]                  
           p(mergesort#1) = [1] x1 + [0]                  
           p(mergesort#2) = [1] x1 + [2]                  
           p(mergesort#3) = [1] x1 + [0]                  
                p(msplit) = [1] x1 + [0]                  
              p(msplit#1) = [1] x1 + [0]                  
              p(msplit#2) = [1] x1 + [2]                  
              p(msplit#3) = [1] x1 + [4]                  
                   p(nil) = [0]                           
               p(tuple#2) = [1] x1 + [1] x2 + [0]         
                p(#cklt#) = [2]                           
             p(#compare#) = [1] x1 + [1]                  
                p(#less#) = [4]                           
                p(merge#) = [1] x2 + [0]                  
              p(merge#1#) = [1] x2 + [0]                  
              p(merge#2#) = [1] x1 + [0]                  
              p(merge#3#) = [1] x5 + [2]                  
            p(mergesort#) = [1] x1 + [2]                  
          p(mergesort#1#) = [1] x1 + [2]                  
          p(mergesort#2#) = [1] x1 + [4]                  
          p(mergesort#3#) = [1] x1 + [2]                  
               p(msplit#) = [0]                           
             p(msplit#1#) = [1] x1 + [0]                  
             p(msplit#2#) = [1] x1 + [0]                  
             p(msplit#3#) = [1] x2 + [0]                  
                   p(c_1) = [4] x1 + [0]                  
                   p(c_2) = [1] x1 + [0]                  
                   p(c_3) = [1] x1 + [0]                  
                   p(c_4) = [1]                           
                   p(c_5) = [1] x1 + [0]                  
                   p(c_6) = [0]                           
                   p(c_7) = [1] x1 + [1]                  
                   p(c_8) = [1] x1 + [0]                  
                   p(c_9) = [1]                           
                  p(c_10) = [4]                           
                  p(c_11) = [2]                           
                  p(c_12) = [1]                           
                  p(c_13) = [0]                           
                  p(c_14) = [4] x1 + [1] x2 + [1] x3 + [2]
                  p(c_15) = [1] x1 + [0]                  
                  p(c_16) = [0]                           
                  p(c_17) = [2]                           
                  p(c_18) = [1] x1 + [1]                  
                  p(c_19) = [1]                           
                  p(c_20) = [0]                           
                  p(c_21) = [1]                           
                  p(c_22) = [1]                           
                  p(c_23) = [4]                           
                  p(c_24) = [1]                           
                  p(c_25) = [0]                           
                  p(c_26) = [2]                           
                  p(c_27) = [2]                           
                  p(c_28) = [2]                           
                  p(c_29) = [1] x1 + [2]                  
                  p(c_30) = [0]                           
                  p(c_31) = [4]                           
                  p(c_32) = [0]                           
                  p(c_33) = [1]                           
                  p(c_34) = [0]                           
                  p(c_35) = [1]                           
        
        Following rules are strictly oriented:
        merge#3#(#false(),@x,@xs,@y,@ys) = [1] @ys + [2]              
                                         > [1] @ys + [1]              
                                         = c_7(merge#(::(@x,@xs),@ys))
        
        
        Following rules are (at-least) weakly oriented:
                           merge#(@l1,@l2) =  [1] @l2 + [0]                             
                                           >= [1] @l2 + [0]                             
                                           =  c_2(merge#1#(@l1,@l2))                    
        
                  merge#1#(::(@x,@xs),@l2) =  [1] @l2 + [0]                             
                                           >= [1] @l2 + [0]                             
                                           =  c_3(merge#2#(@l2,@x,@xs))                 
        
               merge#2#(::(@y,@ys),@x,@xs) =  [1] @ys + [2]                             
                                           >= [1] @ys + [2]                             
                                           =  c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)) 
        
           merge#3#(#true(),@x,@xs,@y,@ys) =  [1] @ys + [2]                             
                                           >= [1] @ys + [2]                             
                                           =  c_8(merge#(@xs,::(@y,@ys)))               
        
                            mergesort#(@l) =  [1] @l + [2]                              
                                           >= [1] @l + [2]                              
                                           =  mergesort#1#(@l)                          
        
                 mergesort#1#(::(@x1,@xs)) =  [1] @xs + [4]                             
                                           >= [1] @xs + [4]                             
                                           =  mergesort#2#(@xs,@x1)                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [1] @xs' + [6]                            
                                           >= [1] @xs' + [6]                            
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l2 + [0]                             
                                           =  merge#(mergesort(@l1),mergesort(@l2))     
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l1 + [2]                             
                                           =  mergesort#(@l1)                           
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l2 + [2]                             
                                           =  mergesort#(@l2)                           
        
                            merge(@l1,@l2) =  [1] @l1 + [1] @l2 + [0]                   
                                           >= [1] @l1 + [1] @l2 + [0]                   
                                           =  merge#1(@l1,@l2)                          
        
                   merge#1(::(@x,@xs),@l2) =  [1] @l2 + [1] @xs + [2]                   
                                           >= [1] @l2 + [1] @xs + [2]                   
                                           =  merge#2(@l2,@x,@xs)                       
        
                        merge#1(nil(),@l2) =  [1] @l2 + [0]                             
                                           >= [1] @l2 + [0]                             
                                           =  @l2                                       
        
                merge#2(::(@y,@ys),@x,@xs) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  merge#3(#less(@x,@y),@x,@xs,@y,@ys)       
        
                     merge#2(nil(),@x,@xs) =  [1] @xs + [2]                             
                                           >= [1] @xs + [2]                             
                                           =  ::(@x,@xs)                                
        
           merge#3(#false(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  ::(@y,merge(::(@x,@xs),@ys))              
        
            merge#3(#true(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  ::(@x,merge(@xs,::(@y,@ys)))              
        
                             mergesort(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  mergesort#1(@l)                           
        
                  mergesort#1(::(@x1,@xs)) =  [1] @xs + [2]                             
                                           >= [1] @xs + [2]                             
                                           =  mergesort#2(@xs,@x1)                      
        
                        mergesort#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  nil()                                     
        
             mergesort#2(::(@x2,@xs'),@x1) =  [1] @xs' + [4]                            
                                           >= [1] @xs' + [4]                            
                                           =  mergesort#3(msplit(::(@x1,::(@x2,@xs')))) 
        
                    mergesort#2(nil(),@x1) =  [2]                                       
                                           >= [2]                                       
                                           =  ::(@x1,nil())                             
        
             mergesort#3(tuple#2(@l1,@l2)) =  [1] @l1 + [1] @l2 + [0]                   
                                           >= [1] @l1 + [1] @l2 + [0]                   
                                           =  merge(mergesort(@l1),mergesort(@l2))      
        
                                msplit(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  msplit#1(@l)                              
        
                     msplit#1(::(@x1,@xs)) =  [1] @xs + [2]                             
                                           >= [1] @xs + [2]                             
                                           =  msplit#2(@xs,@x1)                         
        
                           msplit#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  tuple#2(nil(),nil())                      
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @xs' + [4]                            
                                           >= [1] @xs' + [4]                            
                                           =  msplit#3(msplit(@xs'),@x1,@x2)            
        
                       msplit#2(nil(),@x1) =  [2]                                       
                                           >= [2]                                       
                                           =  tuple#2(::(@x1,nil()),nil())              
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [4]                   
                                           >= [1] @l1 + [1] @l2 + [4]                   
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))          
        
***** Step 6.a:3.b:1.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
        - Weak DPs:
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

***** Step 6.a:3.b:1.b:1.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
        - Weak DPs:
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          2: merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          3: merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          
        Consider the set of all dependency pairs
          1: merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          2: merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          3: merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          4: merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
          5: merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          6: mergesort#(@l) -> mergesort#1#(@l)
          7: mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          8: mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          9: mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
          10: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          11: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        Processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}induces the complexity certificateTIME (?,O(n^1))
        SPACE(?,?)on application of the dependency pairs
          {2,3}
        These cover all (indirect) predecessors of dependency pairs
          {2,3,4,5}
        their number of applications is equally bounded.
        The dependency pairs are shifted into the weak component.
****** Step 6.a:3.b:1.b:1.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
        - Weak DPs:
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_2) = {1},
          uargs(c_3) = {1},
          uargs(c_5) = {1},
          uargs(c_7) = {1},
          uargs(c_8) = {1}
        
        Following symbols are considered usable:
          {merge,merge#1,merge#2,merge#3,mergesort,mergesort#1,mergesort#2,mergesort#3,msplit,msplit#1,msplit#2
          ,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#,mergesort#1#,mergesort#2#
          ,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [0]                  
                   p(#EQ) = [0]                  
                   p(#GT) = [0]                  
                   p(#LT) = [0]                  
                 p(#cklt) = [7] x1 + [1]         
              p(#compare) = [2] x1 + [2] x2 + [2]
                p(#false) = [0]                  
                 p(#less) = [2] x1 + [0]         
                  p(#neg) = [1]                  
                  p(#pos) = [0]                  
                    p(#s) = [1]                  
                 p(#true) = [0]                  
                    p(::) = [1] x2 + [1]         
                 p(merge) = [1] x1 + [1] x2 + [0]
               p(merge#1) = [1] x1 + [1] x2 + [0]
               p(merge#2) = [1] x1 + [1] x3 + [1]
               p(merge#3) = [1] x3 + [1] x5 + [2]
             p(mergesort) = [2] x1 + [0]         
           p(mergesort#1) = [2] x1 + [0]         
           p(mergesort#2) = [2] x1 + [2]         
           p(mergesort#3) = [2] x1 + [0]         
                p(msplit) = [1] x1 + [0]         
              p(msplit#1) = [1] x1 + [0]         
              p(msplit#2) = [1] x1 + [1]         
              p(msplit#3) = [1] x1 + [2]         
                   p(nil) = [0]                  
               p(tuple#2) = [1] x1 + [1] x2 + [0]
                p(#cklt#) = [1]                  
             p(#compare#) = [2] x1 + [1] x2 + [0]
                p(#less#) = [2] x1 + [2]         
                p(merge#) = [2] x1 + [2] x2 + [0]
              p(merge#1#) = [2] x1 + [2] x2 + [0]
              p(merge#2#) = [2] x1 + [2] x3 + [1]
              p(merge#3#) = [2] x3 + [2] x5 + [2]
            p(mergesort#) = [4] x1 + [0]         
          p(mergesort#1#) = [4] x1 + [0]         
          p(mergesort#2#) = [4] x1 + [4]         
          p(mergesort#3#) = [4] x1 + [0]         
               p(msplit#) = [2] x1 + [4]         
             p(msplit#1#) = [0]                  
             p(msplit#2#) = [4] x1 + [4] x2 + [0]
             p(msplit#3#) = [2] x1 + [1]         
                   p(c_1) = [1]                  
                   p(c_2) = [1] x1 + [0]         
                   p(c_3) = [1] x1 + [0]         
                   p(c_4) = [2]                  
                   p(c_5) = [1] x1 + [0]         
                   p(c_6) = [2]                  
                   p(c_7) = [1] x1 + [0]         
                   p(c_8) = [1] x1 + [0]         
                   p(c_9) = [1] x1 + [1]         
                  p(c_10) = [4]                  
                  p(c_11) = [1]                  
                  p(c_12) = [1] x1 + [0]         
                  p(c_13) = [1]                  
                  p(c_14) = [2] x1 + [2] x2 + [0]
                  p(c_15) = [1] x1 + [0]         
                  p(c_16) = [4] x1 + [4]         
                  p(c_17) = [1]                  
                  p(c_18) = [4] x1 + [0]         
                  p(c_19) = [0]                  
                  p(c_20) = [0]                  
                  p(c_21) = [1]                  
                  p(c_22) = [1]                  
                  p(c_23) = [1]                  
                  p(c_24) = [1]                  
                  p(c_25) = [0]                  
                  p(c_26) = [1]                  
                  p(c_27) = [1]                  
                  p(c_28) = [0]                  
                  p(c_29) = [1] x1 + [0]         
                  p(c_30) = [0]                  
                  p(c_31) = [1]                  
                  p(c_32) = [1]                  
                  p(c_33) = [2] x1 + [4]         
                  p(c_34) = [0]                  
                  p(c_35) = [1] x1 + [1]         
        
        Following rules are strictly oriented:
           merge#1#(::(@x,@xs),@l2) = [2] @l2 + [2] @xs + [2]                  
                                    > [2] @l2 + [2] @xs + [1]                  
                                    = c_3(merge#2#(@l2,@x,@xs))                
        
        merge#2#(::(@y,@ys),@x,@xs) = [2] @xs + [2] @ys + [3]                  
                                    > [2] @xs + [2] @ys + [2]                  
                                    = c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
        
        
        Following rules are (at-least) weakly oriented:
                           merge#(@l1,@l2) =  [2] @l1 + [2] @l2 + [0]                   
                                           >= [2] @l1 + [2] @l2 + [0]                   
                                           =  c_2(merge#1#(@l1,@l2))                    
        
          merge#3#(#false(),@x,@xs,@y,@ys) =  [2] @xs + [2] @ys + [2]                   
                                           >= [2] @xs + [2] @ys + [2]                   
                                           =  c_7(merge#(::(@x,@xs),@ys))               
        
           merge#3#(#true(),@x,@xs,@y,@ys) =  [2] @xs + [2] @ys + [2]                   
                                           >= [2] @xs + [2] @ys + [2]                   
                                           =  c_8(merge#(@xs,::(@y,@ys)))               
        
                            mergesort#(@l) =  [4] @l + [0]                              
                                           >= [4] @l + [0]                              
                                           =  mergesort#1#(@l)                          
        
                 mergesort#1#(::(@x1,@xs)) =  [4] @xs + [4]                             
                                           >= [4] @xs + [4]                             
                                           =  mergesort#2#(@xs,@x1)                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [4] @xs' + [8]                            
                                           >= [4] @xs' + [8]                            
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l1 + [4] @l2 + [0]                   
                                           =  merge#(mergesort(@l1),mergesort(@l2))     
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l1 + [0]                             
                                           =  mergesort#(@l1)                           
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [0]                   
                                           >= [4] @l2 + [0]                             
                                           =  mergesort#(@l2)                           
        
                            merge(@l1,@l2) =  [1] @l1 + [1] @l2 + [0]                   
                                           >= [1] @l1 + [1] @l2 + [0]                   
                                           =  merge#1(@l1,@l2)                          
        
                   merge#1(::(@x,@xs),@l2) =  [1] @l2 + [1] @xs + [1]                   
                                           >= [1] @l2 + [1] @xs + [1]                   
                                           =  merge#2(@l2,@x,@xs)                       
        
                        merge#1(nil(),@l2) =  [1] @l2 + [0]                             
                                           >= [1] @l2 + [0]                             
                                           =  @l2                                       
        
                merge#2(::(@y,@ys),@x,@xs) =  [1] @xs + [1] @ys + [2]                   
                                           >= [1] @xs + [1] @ys + [2]                   
                                           =  merge#3(#less(@x,@y),@x,@xs,@y,@ys)       
        
                     merge#2(nil(),@x,@xs) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  ::(@x,@xs)                                
        
           merge#3(#false(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [2]                   
                                           >= [1] @xs + [1] @ys + [2]                   
                                           =  ::(@y,merge(::(@x,@xs),@ys))              
        
            merge#3(#true(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [2]                   
                                           >= [1] @xs + [1] @ys + [2]                   
                                           =  ::(@x,merge(@xs,::(@y,@ys)))              
        
                             mergesort(@l) =  [2] @l + [0]                              
                                           >= [2] @l + [0]                              
                                           =  mergesort#1(@l)                           
        
                  mergesort#1(::(@x1,@xs)) =  [2] @xs + [2]                             
                                           >= [2] @xs + [2]                             
                                           =  mergesort#2(@xs,@x1)                      
        
                        mergesort#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  nil()                                     
        
             mergesort#2(::(@x2,@xs'),@x1) =  [2] @xs' + [4]                            
                                           >= [2] @xs' + [4]                            
                                           =  mergesort#3(msplit(::(@x1,::(@x2,@xs')))) 
        
                    mergesort#2(nil(),@x1) =  [2]                                       
                                           >= [1]                                       
                                           =  ::(@x1,nil())                             
        
             mergesort#3(tuple#2(@l1,@l2)) =  [2] @l1 + [2] @l2 + [0]                   
                                           >= [2] @l1 + [2] @l2 + [0]                   
                                           =  merge(mergesort(@l1),mergesort(@l2))      
        
                                msplit(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  msplit#1(@l)                              
        
                     msplit#1(::(@x1,@xs)) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  msplit#2(@xs,@x1)                         
        
                           msplit#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  tuple#2(nil(),nil())                      
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @xs' + [2]                            
                                           >= [1] @xs' + [2]                            
                                           =  msplit#3(msplit(@xs'),@x1,@x2)            
        
                       msplit#2(nil(),@x1) =  [1]                                       
                                           >= [1]                                       
                                           =  tuple#2(::(@x1,nil()),nil())              
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l1 + [1] @l2 + [2]                   
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))          
        
****** Step 6.a:3.b:1.b:1.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
        - Weak DPs:
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

****** Step 6.a:3.b:1.b:1.b:1.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
        - Weak DPs:
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          1: merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          
        Consider the set of all dependency pairs
          1: merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          2: merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          3: merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          4: merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
          5: merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          6: mergesort#(@l) -> mergesort#1#(@l)
          7: mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          8: mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          9: mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
          10: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          11: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        Processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}induces the complexity certificateTIME (?,O(n^1))
        SPACE(?,?)on application of the dependency pairs
          {1}
        These cover all (indirect) predecessors of dependency pairs
          {1,2,3,4,5}
        their number of applications is equally bounded.
        The dependency pairs are shifted into the weak component.
******* Step 6.a:3.b:1.b:1.b:1.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
        - Weak DPs:
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_2) = {1},
          uargs(c_3) = {1},
          uargs(c_5) = {1},
          uargs(c_7) = {1},
          uargs(c_8) = {1}
        
        Following symbols are considered usable:
          {merge,merge#1,merge#2,merge#3,mergesort,mergesort#1,mergesort#2,mergesort#3,msplit,msplit#1,msplit#2
          ,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#,mergesort#1#,mergesort#2#
          ,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [3]                  
                   p(#EQ) = [0]                  
                   p(#GT) = [0]                  
                   p(#LT) = [0]                  
                 p(#cklt) = [5] x1 + [0]         
              p(#compare) = [2] x1 + [3]         
                p(#false) = [0]                  
                 p(#less) = [0]                  
                  p(#neg) = [2]                  
                  p(#pos) = [1] x1 + [0]         
                    p(#s) = [1] x1 + [3]         
                 p(#true) = [0]                  
                    p(::) = [1] x2 + [2]         
                 p(merge) = [1] x1 + [1] x2 + [0]
               p(merge#1) = [1] x1 + [1] x2 + [0]
               p(merge#2) = [1] x1 + [1] x3 + [2]
               p(merge#3) = [1] x3 + [1] x5 + [4]
             p(mergesort) = [1] x1 + [0]         
           p(mergesort#1) = [1] x1 + [0]         
           p(mergesort#2) = [1] x1 + [2]         
           p(mergesort#3) = [1] x1 + [0]         
                p(msplit) = [1] x1 + [0]         
              p(msplit#1) = [1] x1 + [0]         
              p(msplit#2) = [1] x1 + [2]         
              p(msplit#3) = [1] x1 + [4]         
                   p(nil) = [0]                  
               p(tuple#2) = [1] x1 + [1] x2 + [0]
                p(#cklt#) = [1] x1 + [0]         
             p(#compare#) = [4] x2 + [4]         
                p(#less#) = [4]                  
                p(merge#) = [1] x1 + [1] x2 + [1]
              p(merge#1#) = [1] x1 + [1] x2 + [0]
              p(merge#2#) = [1] x1 + [1] x3 + [2]
              p(merge#3#) = [1] x3 + [1] x5 + [3]
            p(mergesort#) = [2] x1 + [1]         
          p(mergesort#1#) = [2] x1 + [1]         
          p(mergesort#2#) = [2] x1 + [5]         
          p(mergesort#3#) = [2] x1 + [1]         
               p(msplit#) = [1] x1 + [1]         
             p(msplit#1#) = [2] x1 + [0]         
             p(msplit#2#) = [4] x1 + [1] x2 + [0]
             p(msplit#3#) = [1] x1 + [2] x2 + [2]
                   p(c_1) = [0]                  
                   p(c_2) = [1] x1 + [0]         
                   p(c_3) = [1] x1 + [0]         
                   p(c_4) = [0]                  
                   p(c_5) = [1] x1 + [1]         
                   p(c_6) = [2]                  
                   p(c_7) = [1] x1 + [0]         
                   p(c_8) = [1] x1 + [0]         
                   p(c_9) = [1] x1 + [4]         
                  p(c_10) = [2] x1 + [1]         
                  p(c_11) = [1]                  
                  p(c_12) = [4]                  
                  p(c_13) = [0]                  
                  p(c_14) = [1] x1 + [1] x3 + [0]
                  p(c_15) = [1]                  
                  p(c_16) = [1]                  
                  p(c_17) = [1]                  
                  p(c_18) = [2]                  
                  p(c_19) = [1]                  
                  p(c_20) = [1]                  
                  p(c_21) = [0]                  
                  p(c_22) = [0]                  
                  p(c_23) = [1]                  
                  p(c_24) = [1]                  
                  p(c_25) = [0]                  
                  p(c_26) = [0]                  
                  p(c_27) = [2]                  
                  p(c_28) = [4]                  
                  p(c_29) = [2] x1 + [1]         
                  p(c_30) = [0]                  
                  p(c_31) = [2]                  
                  p(c_32) = [4]                  
                  p(c_33) = [1]                  
                  p(c_34) = [2]                  
                  p(c_35) = [1]                  
        
        Following rules are strictly oriented:
        merge#(@l1,@l2) = [1] @l1 + [1] @l2 + [1]
                        > [1] @l1 + [1] @l2 + [0]
                        = c_2(merge#1#(@l1,@l2)) 
        
        
        Following rules are (at-least) weakly oriented:
                  merge#1#(::(@x,@xs),@l2) =  [1] @l2 + [1] @xs + [2]                   
                                           >= [1] @l2 + [1] @xs + [2]                   
                                           =  c_3(merge#2#(@l2,@x,@xs))                 
        
               merge#2#(::(@y,@ys),@x,@xs) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)) 
        
          merge#3#(#false(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [3]                   
                                           >= [1] @xs + [1] @ys + [3]                   
                                           =  c_7(merge#(::(@x,@xs),@ys))               
        
           merge#3#(#true(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [3]                   
                                           >= [1] @xs + [1] @ys + [3]                   
                                           =  c_8(merge#(@xs,::(@y,@ys)))               
        
                            mergesort#(@l) =  [2] @l + [1]                              
                                           >= [2] @l + [1]                              
                                           =  mergesort#1#(@l)                          
        
                 mergesort#1#(::(@x1,@xs)) =  [2] @xs + [5]                             
                                           >= [2] @xs + [5]                             
                                           =  mergesort#2#(@xs,@x1)                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [2] @xs' + [9]                            
                                           >= [2] @xs' + [9]                            
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [2] @l1 + [2] @l2 + [1]                   
                                           >= [1] @l1 + [1] @l2 + [1]                   
                                           =  merge#(mergesort(@l1),mergesort(@l2))     
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [2] @l1 + [2] @l2 + [1]                   
                                           >= [2] @l1 + [1]                             
                                           =  mergesort#(@l1)                           
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [2] @l1 + [2] @l2 + [1]                   
                                           >= [2] @l2 + [1]                             
                                           =  mergesort#(@l2)                           
        
                            merge(@l1,@l2) =  [1] @l1 + [1] @l2 + [0]                   
                                           >= [1] @l1 + [1] @l2 + [0]                   
                                           =  merge#1(@l1,@l2)                          
        
                   merge#1(::(@x,@xs),@l2) =  [1] @l2 + [1] @xs + [2]                   
                                           >= [1] @l2 + [1] @xs + [2]                   
                                           =  merge#2(@l2,@x,@xs)                       
        
                        merge#1(nil(),@l2) =  [1] @l2 + [0]                             
                                           >= [1] @l2 + [0]                             
                                           =  @l2                                       
        
                merge#2(::(@y,@ys),@x,@xs) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  merge#3(#less(@x,@y),@x,@xs,@y,@ys)       
        
                     merge#2(nil(),@x,@xs) =  [1] @xs + [2]                             
                                           >= [1] @xs + [2]                             
                                           =  ::(@x,@xs)                                
        
           merge#3(#false(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  ::(@y,merge(::(@x,@xs),@ys))              
        
            merge#3(#true(),@x,@xs,@y,@ys) =  [1] @xs + [1] @ys + [4]                   
                                           >= [1] @xs + [1] @ys + [4]                   
                                           =  ::(@x,merge(@xs,::(@y,@ys)))              
        
                             mergesort(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  mergesort#1(@l)                           
        
                  mergesort#1(::(@x1,@xs)) =  [1] @xs + [2]                             
                                           >= [1] @xs + [2]                             
                                           =  mergesort#2(@xs,@x1)                      
        
                        mergesort#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  nil()                                     
        
             mergesort#2(::(@x2,@xs'),@x1) =  [1] @xs' + [4]                            
                                           >= [1] @xs' + [4]                            
                                           =  mergesort#3(msplit(::(@x1,::(@x2,@xs')))) 
        
                    mergesort#2(nil(),@x1) =  [2]                                       
                                           >= [2]                                       
                                           =  ::(@x1,nil())                             
        
             mergesort#3(tuple#2(@l1,@l2)) =  [1] @l1 + [1] @l2 + [0]                   
                                           >= [1] @l1 + [1] @l2 + [0]                   
                                           =  merge(mergesort(@l1),mergesort(@l2))      
        
                                msplit(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  msplit#1(@l)                              
        
                     msplit#1(::(@x1,@xs)) =  [1] @xs + [2]                             
                                           >= [1] @xs + [2]                             
                                           =  msplit#2(@xs,@x1)                         
        
                           msplit#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  tuple#2(nil(),nil())                      
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @xs' + [4]                            
                                           >= [1] @xs' + [4]                            
                                           =  msplit#3(msplit(@xs'),@x1,@x2)            
        
                       msplit#2(nil(),@x1) =  [2]                                       
                                           >= [2]                                       
                                           =  tuple#2(::(@x1,nil()),nil())              
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [4]                   
                                           >= [1] @l1 + [1] @l2 + [4]                   
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))          
        
******* Step 6.a:3.b:1.b:1.b:1.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

******* Step 6.a:3.b:1.b:1.b:1.b:1.b:1: RemoveWeakSuffixes WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:W:merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
             -->_1 merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs)):2
          
          2:W:merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
             -->_1 merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)):3
          
          3:W:merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
             -->_1 merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys))):5
             -->_1 merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys)):4
          
          4:W:merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          5:W:merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          6:W:mergesort#(@l) -> mergesort#1#(@l)
             -->_1 mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1):7
          
          7:W:mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs')))):8
          
          8:W:mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2):11
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1):10
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2)):9
          
          9:W:mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):1
          
          10:W:mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
             -->_1 mergesort#(@l) -> mergesort#1#(@l):6
          
          11:W:mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
             -->_1 mergesort#(@l) -> mergesort#1#(@l):6
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          6: mergesort#(@l) -> mergesort#1#(@l)
          11: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
          8: mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          7: mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          10: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          9: mergesort#3#(tuple#2(@l1,@l2)) -> merge#(mergesort(@l1),mergesort(@l2))
          1: merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          5: merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          3: merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          2: merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          4: merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
******* Step 6.a:3.b:1.b:1.b:1.b:1.b:2: EmptyProcessor WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/1,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        EmptyProcessor
    + Details:
        The problem is already closed. The intended complexity is O(1).

** Step 6.b:1: RemoveWeakSuffixes WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak DPs:
            merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
            merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
            merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
            merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
            merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:S:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):2
          
          2:S:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):3
          
          3:S:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):5
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):4
          
          4:S:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):8
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
          
          5:S:msplit#(@l) -> c_15(msplit#1#(@l))
             -->_1 msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1)):6
          
          6:S:msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
             -->_1 msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs')):7
          
          7:S:msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
             -->_1 msplit#(@l) -> c_15(msplit#1#(@l)):5
          
          8:W:merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
             -->_1 merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs)):9
          
          9:W:merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
             -->_1 merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys)):10
          
          10:W:merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
             -->_1 merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys))):12
             -->_1 merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys)):11
          
          11:W:merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):8
          
          12:W:merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
             -->_1 merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2)):8
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          8: merge#(@l1,@l2) -> c_2(merge#1#(@l1,@l2))
          12: merge#3#(#true(),@x,@xs,@y,@ys) -> c_8(merge#(@xs,::(@y,@ys)))
          10: merge#2#(::(@y,@ys),@x,@xs) -> c_5(merge#3#(#less(@x,@y),@x,@xs,@y,@ys))
          9: merge#1#(::(@x,@xs),@l2) -> c_3(merge#2#(@l2,@x,@xs))
          11: merge#3#(#false(),@x,@xs,@y,@ys) -> c_7(merge#(::(@x,@xs),@ys))
** Step 6.b:2: SimplifyRHS WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                  ,mergesort#(@l1)
                                                  ,mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/3,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        SimplifyRHS
    + Details:
        Consider the dependency graph
          1:S:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):2
          
          2:S:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):3
          
          3:S:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_2 msplit#(@l) -> c_15(msplit#1#(@l)):5
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                         ,mergesort#(@l1)
                                                         ,mergesort#(@l2)):4
          
          4:S:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(merge#(mergesort(@l1),mergesort(@l2))
                                                    ,mergesort#(@l1)
                                                    ,mergesort#(@l2))
             -->_3 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
          
          5:S:msplit#(@l) -> c_15(msplit#1#(@l))
             -->_1 msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1)):6
          
          6:S:msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
             -->_1 msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs')):7
          
          7:S:msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
             -->_1 msplit#(@l) -> c_15(msplit#1#(@l)):5
          
        Due to missing edges in the depndency graph, the right-hand sides of following rules could be simplified:
          mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
** Step 6.b:3: UsableRules WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            #cklt(#EQ()) -> #false()
            #cklt(#GT()) -> #false()
            #cklt(#LT()) -> #true()
            #compare(#0(),#0()) -> #EQ()
            #compare(#0(),#neg(@y)) -> #GT()
            #compare(#0(),#pos(@y)) -> #LT()
            #compare(#0(),#s(@y)) -> #LT()
            #compare(#neg(@x),#0()) -> #LT()
            #compare(#neg(@x),#neg(@y)) -> #compare(@y,@x)
            #compare(#neg(@x),#pos(@y)) -> #LT()
            #compare(#pos(@x),#0()) -> #GT()
            #compare(#pos(@x),#neg(@y)) -> #GT()
            #compare(#pos(@x),#pos(@y)) -> #compare(@x,@y)
            #compare(#s(@x),#0()) -> #GT()
            #compare(#s(@x),#s(@y)) -> #compare(@x,@y)
            #less(@x,@y) -> #cklt(#compare(@x,@y))
            merge(@l1,@l2) -> merge#1(@l1,@l2)
            merge#1(::(@x,@xs),@l2) -> merge#2(@l2,@x,@xs)
            merge#1(nil(),@l2) -> @l2
            merge#2(::(@y,@ys),@x,@xs) -> merge#3(#less(@x,@y),@x,@xs,@y,@ys)
            merge#2(nil(),@x,@xs) -> ::(@x,@xs)
            merge#3(#false(),@x,@xs,@y,@ys) -> ::(@y,merge(::(@x,@xs),@ys))
            merge#3(#true(),@x,@xs,@y,@ys) -> ::(@x,merge(@xs,::(@y,@ys)))
            mergesort(@l) -> mergesort#1(@l)
            mergesort#1(::(@x1,@xs)) -> mergesort#2(@xs,@x1)
            mergesort#1(nil()) -> nil()
            mergesort#2(::(@x2,@xs'),@x1) -> mergesort#3(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2(nil(),@x1) -> ::(@x1,nil())
            mergesort#3(tuple#2(@l1,@l2)) -> merge(mergesort(@l1),mergesort(@l2))
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        UsableRules
    + Details:
        We replace rewrite rules by usable rules:
          msplit(@l) -> msplit#1(@l)
          msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
          msplit#1(nil()) -> tuple#2(nil(),nil())
          msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
          msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
          msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
          mergesort#(@l) -> c_9(mergesort#1#(@l))
          mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                ,msplit#(::(@x1,::(@x2,@xs'))))
          mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
          msplit#(@l) -> c_15(msplit#1#(@l))
          msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
** Step 6.b:4: DecomposeDG WORST_CASE(?,O(n^2))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        DecomposeDG {onSelection = all below first cut in WDG, onUpper = Just someStrategy, onLower = Nothing}
    + Details:
        We decompose the input problem according to the dependency graph into the upper component
          mergesort#(@l) -> c_9(mergesort#1#(@l))
          mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                ,msplit#(::(@x1,::(@x2,@xs'))))
          mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
        and a lower component
          msplit#(@l) -> c_15(msplit#1#(@l))
          msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        Further, following extension rules are added to the lower component.
          mergesort#(@l) -> mergesort#1#(@l)
          mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
          mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
*** Step 6.b:4.a:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          3: mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                   ,msplit#(::(@x1,::(@x2,@xs'))))
          
        Consider the set of all dependency pairs
          1: mergesort#(@l) -> c_9(mergesort#1#(@l))
          2: mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
          3: mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                   ,msplit#(::(@x1,::(@x2,@xs'))))
          4: mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
        Processor NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}induces the complexity certificateTIME (?,O(n^1))
        SPACE(?,?)on application of the dependency pairs
          {3}
        These cover all (indirect) predecessors of dependency pairs
          {1,2,3,4}
        their number of applications is equally bounded.
        The dependency pairs are shifted into the weak component.
**** Step 6.b:4.a:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 3, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation (containing no more than 1 non-zero interpretation-entries in the diagonal of the component-wise maxima):
        The following argument positions are considered usable:
          uargs(c_9) = {1},
          uargs(c_10) = {1},
          uargs(c_12) = {1},
          uargs(c_14) = {1,2}
        
        Following symbols are considered usable:
          {msplit,msplit#1,msplit#2,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#
          ,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(#EQ) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(#GT) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(#LT) = [0]                                       
                            [0]                                       
                            [0]                                       
                 p(#cklt) = [0]                                       
                            [0]                                       
                            [0]                                       
              p(#compare) = [0]                                       
                            [0]                                       
                            [0]                                       
                p(#false) = [0]                                       
                            [0]                                       
                            [0]                                       
                 p(#less) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(#neg) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(#pos) = [0]                                       
                            [0]                                       
                            [0]                                       
                    p(#s) = [0]                                       
                            [0]                                       
                            [0]                                       
                 p(#true) = [0]                                       
                            [0]                                       
                            [0]                                       
                    p(::) = [0 0 0]      [0 1 0]      [0]             
                            [0 0 0] x1 + [0 0 1] x2 + [0]             
                            [0 0 1]      [0 0 1]      [1]             
                 p(merge) = [0]                                       
                            [0]                                       
                            [0]                                       
               p(merge#1) = [0]                                       
                            [0]                                       
                            [0]                                       
               p(merge#2) = [0]                                       
                            [0]                                       
                            [0]                                       
               p(merge#3) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(mergesort) = [0]                                       
                            [0]                                       
                            [0]                                       
           p(mergesort#1) = [0]                                       
                            [0]                                       
                            [0]                                       
           p(mergesort#2) = [0]                                       
                            [0]                                       
                            [0]                                       
           p(mergesort#3) = [0]                                       
                            [0]                                       
                            [0]                                       
                p(msplit) = [1 0 0]      [0]                          
                            [0 0 0] x1 + [1]                          
                            [0 0 1]      [0]                          
              p(msplit#1) = [1 0 0]      [0]                          
                            [0 0 0] x1 + [1]                          
                            [0 0 1]      [0]                          
              p(msplit#2) = [0 1 0]      [0 0 0]      [0]             
                            [0 0 0] x1 + [0 0 0] x2 + [1]             
                            [0 0 1]      [0 0 1]      [1]             
              p(msplit#3) = [0 0 1]      [0 0 0]      [0 0 0]      [0]
                            [0 0 0] x1 + [0 0 0] x2 + [0 0 0] x3 + [1]
                            [0 1 1]      [0 0 1]      [0 0 1]      [1]
                   p(nil) = [0]                                       
                            [0]                                       
                            [0]                                       
               p(tuple#2) = [0 1 0]      [0 1 0]      [0]             
                            [0 0 0] x1 + [0 0 0] x2 + [1]             
                            [0 0 1]      [0 0 1]      [0]             
                p(#cklt#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(#compare#) = [0]                                       
                            [0]                                       
                            [0]                                       
                p(#less#) = [0]                                       
                            [0]                                       
                            [0]                                       
                p(merge#) = [0]                                       
                            [0]                                       
                            [0]                                       
              p(merge#1#) = [0]                                       
                            [0]                                       
                            [0]                                       
              p(merge#2#) = [0]                                       
                            [0]                                       
                            [0]                                       
              p(merge#3#) = [0]                                       
                            [0]                                       
                            [0]                                       
            p(mergesort#) = [0 1 0]      [0]                          
                            [0 0 1] x1 + [0]                          
                            [1 1 0]      [0]                          
          p(mergesort#1#) = [0 1 0]      [0]                          
                            [1 1 0] x1 + [0]                          
                            [1 0 1]      [0]                          
          p(mergesort#2#) = [0 0 1]      [0]                          
                            [0 1 0] x1 + [0]                          
                            [0 1 1]      [0]                          
          p(mergesort#3#) = [1 0 0]      [0]                          
                            [0 0 1] x1 + [1]                          
                            [0 0 1]      [1]                          
               p(msplit#) = [0 1 0]      [0]                          
                            [1 0 0] x1 + [0]                          
                            [0 1 0]      [1]                          
             p(msplit#1#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(msplit#2#) = [0]                                       
                            [0]                                       
                            [0]                                       
             p(msplit#3#) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_1) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_2) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_3) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_4) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_5) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_6) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_7) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_8) = [0]                                       
                            [0]                                       
                            [0]                                       
                   p(c_9) = [1 0 0]      [0]                          
                            [0 0 0] x1 + [0]                          
                            [0 1 0]      [0]                          
                  p(c_10) = [1 0 0]      [0]                          
                            [0 1 0] x1 + [0]                          
                            [1 1 0]      [0]                          
                  p(c_11) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_12) = [1 0 0]      [0 0 0]      [0]             
                            [0 0 0] x1 + [0 0 0] x2 + [0]             
                            [1 0 0]      [1 0 0]      [0]             
                  p(c_13) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_14) = [1 0 0]      [1 0 0]      [0]             
                            [0 1 0] x1 + [0 0 0] x2 + [0]             
                            [0 1 0]      [0 0 0]      [0]             
                  p(c_15) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_16) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_17) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_18) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_19) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_20) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_21) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_22) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_23) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_24) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_25) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_26) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_27) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_28) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_29) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_30) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_31) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_32) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_33) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_34) = [0]                                       
                            [0]                                       
                            [0]                                       
                  p(c_35) = [0]                                       
                            [0]                                       
                            [0]                                       
        
        Following rules are strictly oriented:
        mergesort#2#(::(@x2,@xs'),@x1) = [0 0 1]       [0 0 1]        [1]                                              
                                         [0 0 0] @x2 + [0 0 1] @xs' + [0]                                              
                                         [0 0 1]       [0 0 2]        [1]                                              
                                       > [0 0 0]       [0 0 1]        [0]                                              
                                         [0 0 0] @x2 + [0 0 0] @xs' + [0]                                              
                                         [0 0 1]       [0 0 2]        [1]                                              
                                       = c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs')))),msplit#(::(@x1,::(@x2,@xs'))))
        
        
        Following rules are (at-least) weakly oriented:
                            mergesort#(@l) =  [0 1 0]      [0]                                           
                                              [0 0 1] @l + [0]                                           
                                              [1 1 0]      [0]                                           
                                           >= [0 1 0]      [0]                                           
                                              [0 0 0] @l + [0]                                           
                                              [1 1 0]      [0]                                           
                                           =  c_9(mergesort#1#(@l))                                      
        
                 mergesort#1#(::(@x1,@xs)) =  [0 0 0]       [0 0 1]       [0]                            
                                              [0 0 0] @x1 + [0 1 1] @xs + [0]                            
                                              [0 0 1]       [0 1 1]       [1]                            
                                           >= [0 0 1]       [0]                                          
                                              [0 1 0] @xs + [0]                                          
                                              [0 1 1]       [0]                                          
                                           =  c_10(mergesort#2#(@xs,@x1))                                
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [0 1 0]       [0 1 0]       [0]                            
                                              [0 0 1] @l1 + [0 0 1] @l2 + [1]                            
                                              [0 0 1]       [0 0 1]       [1]                            
                                           >= [0 1 0]       [0 1 0]       [0]                            
                                              [0 0 1] @l1 + [0 0 0] @l2 + [0]                            
                                              [0 0 1]       [0 0 0]       [0]                            
                                           =  c_14(mergesort#(@l1),mergesort#(@l2))                      
        
                                msplit(@l) =  [1 0 0]      [0]                                           
                                              [0 0 0] @l + [1]                                           
                                              [0 0 1]      [0]                                           
                                           >= [1 0 0]      [0]                                           
                                              [0 0 0] @l + [1]                                           
                                              [0 0 1]      [0]                                           
                                           =  msplit#1(@l)                                               
        
                     msplit#1(::(@x1,@xs)) =  [0 0 0]       [0 1 0]       [0]                            
                                              [0 0 0] @x1 + [0 0 0] @xs + [1]                            
                                              [0 0 1]       [0 0 1]       [1]                            
                                           >= [0 0 0]       [0 1 0]       [0]                            
                                              [0 0 0] @x1 + [0 0 0] @xs + [1]                            
                                              [0 0 1]       [0 0 1]       [1]                            
                                           =  msplit#2(@xs,@x1)                                          
        
                           msplit#1(nil()) =  [0]                                                        
                                              [1]                                                        
                                              [0]                                                        
                                           >= [0]                                                        
                                              [1]                                                        
                                              [0]                                                        
                                           =  tuple#2(nil(),nil())                                       
        
                msplit#2(::(@x2,@xs'),@x1) =  [0 0 0]       [0 0 0]       [0 0 1]        [0]             
                                              [0 0 0] @x1 + [0 0 0] @x2 + [0 0 0] @xs' + [1]             
                                              [0 0 1]       [0 0 1]       [0 0 1]        [2]             
                                           >= [0 0 0]       [0 0 0]       [0 0 1]        [0]             
                                              [0 0 0] @x1 + [0 0 0] @x2 + [0 0 0] @xs' + [1]             
                                              [0 0 1]       [0 0 1]       [0 0 1]        [2]             
                                           =  msplit#3(msplit(@xs'),@x1,@x2)                             
        
                       msplit#2(nil(),@x1) =  [0 0 0]       [0]                                          
                                              [0 0 0] @x1 + [1]                                          
                                              [0 0 1]       [1]                                          
                                           >= [0 0 0]       [0]                                          
                                              [0 0 0] @x1 + [1]                                          
                                              [0 0 1]       [1]                                          
                                           =  tuple#2(::(@x1,nil()),nil())                               
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [0 0 1]       [0 0 1]       [0 0 0]       [0 0 0]       [0]
                                              [0 0 0] @l1 + [0 0 0] @l2 + [0 0 0] @x1 + [0 0 0] @x2 + [1]
                                              [0 0 1]       [0 0 1]       [0 0 1]       [0 0 1]       [2]
                                           >= [0 0 1]       [0 0 1]       [0 0 0]       [0 0 0]       [0]
                                              [0 0 0] @l1 + [0 0 0] @l2 + [0 0 0] @x1 + [0 0 0] @x2 + [1]
                                              [0 0 1]       [0 0 1]       [0 0 1]       [0 0 1]       [2]
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))                           
        
**** Step 6.b:4.a:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Strict DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
        - Weak DPs:
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

**** Step 6.b:4.a:1.b:1: RemoveWeakSuffixes WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            mergesort#(@l) -> c_9(mergesort#1#(@l))
            mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
            mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                  ,msplit#(::(@x1,::(@x2,@xs'))))
            mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:W:mergesort#(@l) -> c_9(mergesort#1#(@l))
             -->_1 mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1)):2
          
          2:W:mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                         ,msplit#(::(@x1,::(@x2,@xs')))):3
          
          3:W:mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                    ,msplit#(::(@x1,::(@x2,@xs'))))
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2)):4
          
          4:W:mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
             -->_2 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
             -->_1 mergesort#(@l) -> c_9(mergesort#1#(@l)):1
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          1: mergesort#(@l) -> c_9(mergesort#1#(@l))
          4: mergesort#3#(tuple#2(@l1,@l2)) -> c_14(mergesort#(@l1),mergesort#(@l2))
          3: mergesort#2#(::(@x2,@xs'),@x1) -> c_12(mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
                                                   ,msplit#(::(@x1,::(@x2,@xs'))))
          2: mergesort#1#(::(@x1,@xs)) -> c_10(mergesort#2#(@xs,@x1))
**** Step 6.b:4.a:1.b:2: EmptyProcessor WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        EmptyProcessor
    + Details:
        The problem is already closed. The intended complexity is O(1).

*** Step 6.b:4.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          3: msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
          
        The strictly oriented rules are moved into the weak component.
**** Step 6.b:4.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_15) = {1},
          uargs(c_16) = {1},
          uargs(c_18) = {1}
        
        Following symbols are considered usable:
          {msplit,msplit#1,msplit#2,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#
          ,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [2]                           
                   p(#EQ) = [1]                           
                   p(#GT) = [4]                           
                   p(#LT) = [0]                           
                 p(#cklt) = [0]                           
              p(#compare) = [0]                           
                p(#false) = [8]                           
                 p(#less) = [2] x1 + [1] x2 + [2]         
                  p(#neg) = [1] x1 + [8]                  
                  p(#pos) = [8]                           
                    p(#s) = [1] x1 + [2]                  
                 p(#true) = [1]                           
                    p(::) = [1] x1 + [1] x2 + [2]         
                 p(merge) = [1]                           
               p(merge#1) = [4] x2 + [1]                  
               p(merge#2) = [1] x3 + [1]                  
               p(merge#3) = [4] x3 + [1]                  
             p(mergesort) = [1] x1 + [0]                  
           p(mergesort#1) = [0]                           
           p(mergesort#2) = [2] x2 + [1]                  
           p(mergesort#3) = [1]                           
                p(msplit) = [1] x1 + [0]                  
              p(msplit#1) = [1] x1 + [0]                  
              p(msplit#2) = [1] x1 + [1] x2 + [2]         
              p(msplit#3) = [1] x1 + [1] x2 + [1] x3 + [4]
                   p(nil) = [0]                           
               p(tuple#2) = [1] x1 + [1] x2 + [0]         
                p(#cklt#) = [8] x1 + [1]                  
             p(#compare#) = [1] x1 + [1] x2 + [1]         
                p(#less#) = [1]                           
                p(merge#) = [1] x2 + [8]                  
              p(merge#1#) = [1] x2 + [2]                  
              p(merge#2#) = [8] x1 + [1] x2 + [8] x3 + [1]
              p(merge#3#) = [2] x1 + [2] x2 + [1] x5 + [0]
            p(mergesort#) = [4] x1 + [2]                  
          p(mergesort#1#) = [4] x1 + [2]                  
          p(mergesort#2#) = [4] x1 + [4] x2 + [10]        
          p(mergesort#3#) = [4] x1 + [2]                  
               p(msplit#) = [4] x1 + [0]                  
             p(msplit#1#) = [4] x1 + [0]                  
             p(msplit#2#) = [4] x1 + [4] x2 + [8]         
             p(msplit#3#) = [1] x1 + [1] x2 + [1] x3 + [0]
                   p(c_1) = [1] x2 + [1]                  
                   p(c_2) = [8]                           
                   p(c_3) = [2] x1 + [0]                  
                   p(c_4) = [0]                           
                   p(c_5) = [1]                           
                   p(c_6) = [1]                           
                   p(c_7) = [2]                           
                   p(c_8) = [1] x1 + [8]                  
                   p(c_9) = [8] x1 + [1]                  
                  p(c_10) = [1]                           
                  p(c_11) = [1]                           
                  p(c_12) = [1] x2 + [2]                  
                  p(c_13) = [1]                           
                  p(c_14) = [1] x1 + [2] x2 + [1]         
                  p(c_15) = [1] x1 + [0]                  
                  p(c_16) = [1] x1 + [0]                  
                  p(c_17) = [2]                           
                  p(c_18) = [1] x1 + [8]                  
                  p(c_19) = [2]                           
                  p(c_20) = [1]                           
                  p(c_21) = [1]                           
                  p(c_22) = [1]                           
                  p(c_23) = [1]                           
                  p(c_24) = [1]                           
                  p(c_25) = [1]                           
                  p(c_26) = [1]                           
                  p(c_27) = [0]                           
                  p(c_28) = [2]                           
                  p(c_29) = [1] x1 + [1]                  
                  p(c_30) = [1]                           
                  p(c_31) = [0]                           
                  p(c_32) = [1]                           
                  p(c_33) = [2] x1 + [1]                  
                  p(c_34) = [0]                           
                  p(c_35) = [1]                           
        
        Following rules are strictly oriented:
        msplit#2#(::(@x2,@xs'),@x1) = [4] @x1 + [4] @x2 + [4] @xs' + [16]
                                    > [4] @xs' + [8]                     
                                    = c_18(msplit#(@xs'))                
        
        
        Following rules are (at-least) weakly oriented:
                            mergesort#(@l) =  [4] @l + [2]                               
                                           >= [4] @l + [2]                               
                                           =  mergesort#1#(@l)                           
        
                 mergesort#1#(::(@x1,@xs)) =  [4] @x1 + [4] @xs + [10]                   
                                           >= [4] @x1 + [4] @xs + [10]                   
                                           =  mergesort#2#(@xs,@x1)                      
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [4] @x1 + [4] @x2 + [4] @xs' + [18]        
                                           >= [4] @x1 + [4] @x2 + [4] @xs' + [18]        
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs')))) 
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [4] @x1 + [4] @x2 + [4] @xs' + [18]        
                                           >= [4] @x1 + [4] @x2 + [4] @xs' + [16]        
                                           =  msplit#(::(@x1,::(@x2,@xs')))              
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [2]                    
                                           >= [4] @l1 + [2]                              
                                           =  mergesort#(@l1)                            
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [2]                    
                                           >= [4] @l2 + [2]                              
                                           =  mergesort#(@l2)                            
        
                               msplit#(@l) =  [4] @l + [0]                               
                                           >= [4] @l + [0]                               
                                           =  c_15(msplit#1#(@l))                        
        
                    msplit#1#(::(@x1,@xs)) =  [4] @x1 + [4] @xs + [8]                    
                                           >= [4] @x1 + [4] @xs + [8]                    
                                           =  c_16(msplit#2#(@xs,@x1))                   
        
                                msplit(@l) =  [1] @l + [0]                               
                                           >= [1] @l + [0]                               
                                           =  msplit#1(@l)                               
        
                     msplit#1(::(@x1,@xs)) =  [1] @x1 + [1] @xs + [2]                    
                                           >= [1] @x1 + [1] @xs + [2]                    
                                           =  msplit#2(@xs,@x1)                          
        
                           msplit#1(nil()) =  [0]                                        
                                           >= [0]                                        
                                           =  tuple#2(nil(),nil())                       
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @x1 + [1] @x2 + [1] @xs' + [4]         
                                           >= [1] @x1 + [1] @x2 + [1] @xs' + [4]         
                                           =  msplit#3(msplit(@xs'),@x1,@x2)             
        
                       msplit#2(nil(),@x1) =  [1] @x1 + [2]                              
                                           >= [1] @x1 + [2]                              
                                           =  tuple#2(::(@x1,nil()),nil())               
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [1] @x1 + [1] @x2 + [4]
                                           >= [1] @l1 + [1] @l2 + [1] @x1 + [1] @x2 + [4]
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))           
        
**** Step 6.b:4.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

**** Step 6.b:4.b:1.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          2: msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          
        Consider the set of all dependency pairs
          1: msplit#(@l) -> c_15(msplit#1#(@l))
          2: msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          3: mergesort#(@l) -> mergesort#1#(@l)
          4: mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          5: mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          6: mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
          7: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          8: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
          9: msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        Processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}induces the complexity certificateTIME (?,O(n^1))
        SPACE(?,?)on application of the dependency pairs
          {2}
        These cover all (indirect) predecessors of dependency pairs
          {2,9}
        their number of applications is equally bounded.
        The dependency pairs are shifted into the weak component.
***** Step 6.b:4.b:1.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_15) = {1},
          uargs(c_16) = {1},
          uargs(c_18) = {1}
        
        Following symbols are considered usable:
          {msplit,msplit#1,msplit#2,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#
          ,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [1]                           
                   p(#EQ) = [2]                           
                   p(#GT) = [2]                           
                   p(#LT) = [0]                           
                 p(#cklt) = [8] x1 + [0]                  
              p(#compare) = [1] x1 + [1] x2 + [1]         
                p(#false) = [0]                           
                 p(#less) = [1] x1 + [1] x2 + [1]         
                  p(#neg) = [1]                           
                  p(#pos) = [0]                           
                    p(#s) = [0]                           
                 p(#true) = [2]                           
                    p(::) = [1] x2 + [1]                  
                 p(merge) = [1] x1 + [1] x2 + [0]         
               p(merge#1) = [1]                           
               p(merge#2) = [1] x2 + [1] x3 + [0]         
               p(merge#3) = [1] x4 + [1] x5 + [2]         
             p(mergesort) = [8]                           
           p(mergesort#1) = [0]                           
           p(mergesort#2) = [1] x1 + [1]                  
           p(mergesort#3) = [1] x1 + [2]                  
                p(msplit) = [1] x1 + [0]                  
              p(msplit#1) = [1] x1 + [0]                  
              p(msplit#2) = [1] x1 + [1]                  
              p(msplit#3) = [1] x1 + [2]                  
                   p(nil) = [0]                           
               p(tuple#2) = [1] x1 + [1] x2 + [0]         
                p(#cklt#) = [2] x1 + [1]                  
             p(#compare#) = [1] x2 + [8]                  
                p(#less#) = [1] x2 + [1]                  
                p(merge#) = [1] x1 + [0]                  
              p(merge#1#) = [1] x1 + [1] x2 + [0]         
              p(merge#2#) = [4] x1 + [1] x2 + [1] x3 + [1]
              p(merge#3#) = [1] x1 + [2] x5 + [0]         
            p(mergesort#) = [8] x1 + [4]                  
          p(mergesort#1#) = [8] x1 + [4]                  
          p(mergesort#2#) = [8] x1 + [12]                 
          p(mergesort#3#) = [8] x1 + [4]                  
               p(msplit#) = [8] x1 + [4]                  
             p(msplit#1#) = [8] x1 + [4]                  
             p(msplit#2#) = [8] x1 + [4]                  
             p(msplit#3#) = [1] x1 + [1] x2 + [1] x3 + [1]
                   p(c_1) = [1] x1 + [2] x2 + [1]         
                   p(c_2) = [1] x1 + [1]                  
                   p(c_3) = [2] x1 + [0]                  
                   p(c_4) = [0]                           
                   p(c_5) = [1]                           
                   p(c_6) = [1]                           
                   p(c_7) = [1] x1 + [0]                  
                   p(c_8) = [1] x1 + [1]                  
                   p(c_9) = [1] x1 + [1]                  
                  p(c_10) = [1]                           
                  p(c_11) = [1]                           
                  p(c_12) = [4]                           
                  p(c_13) = [2]                           
                  p(c_14) = [2] x1 + [1] x2 + [2]         
                  p(c_15) = [1] x1 + [0]                  
                  p(c_16) = [1] x1 + [7]                  
                  p(c_17) = [1]                           
                  p(c_18) = [1] x1 + [8]                  
                  p(c_19) = [2]                           
                  p(c_20) = [1]                           
                  p(c_21) = [1]                           
                  p(c_22) = [0]                           
                  p(c_23) = [1]                           
                  p(c_24) = [2]                           
                  p(c_25) = [1]                           
                  p(c_26) = [1]                           
                  p(c_27) = [1]                           
                  p(c_28) = [8]                           
                  p(c_29) = [8] x1 + [0]                  
                  p(c_30) = [0]                           
                  p(c_31) = [8]                           
                  p(c_32) = [1]                           
                  p(c_33) = [1]                           
                  p(c_34) = [1]                           
                  p(c_35) = [2] x1 + [1]                  
        
        Following rules are strictly oriented:
        msplit#1#(::(@x1,@xs)) = [8] @xs + [12]          
                               > [8] @xs + [11]          
                               = c_16(msplit#2#(@xs,@x1))
        
        
        Following rules are (at-least) weakly oriented:
                            mergesort#(@l) =  [8] @l + [4]                              
                                           >= [8] @l + [4]                              
                                           =  mergesort#1#(@l)                          
        
                 mergesort#1#(::(@x1,@xs)) =  [8] @xs + [12]                            
                                           >= [8] @xs + [12]                            
                                           =  mergesort#2#(@xs,@x1)                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [8] @xs' + [20]                           
                                           >= [8] @xs' + [20]                           
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [8] @xs' + [20]                           
                                           >= [8] @xs' + [20]                           
                                           =  msplit#(::(@x1,::(@x2,@xs')))             
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [8] @l1 + [8] @l2 + [4]                   
                                           >= [8] @l1 + [4]                             
                                           =  mergesort#(@l1)                           
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [8] @l1 + [8] @l2 + [4]                   
                                           >= [8] @l2 + [4]                             
                                           =  mergesort#(@l2)                           
        
                               msplit#(@l) =  [8] @l + [4]                              
                                           >= [8] @l + [4]                              
                                           =  c_15(msplit#1#(@l))                       
        
               msplit#2#(::(@x2,@xs'),@x1) =  [8] @xs' + [12]                           
                                           >= [8] @xs' + [12]                           
                                           =  c_18(msplit#(@xs'))                       
        
                                msplit(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  msplit#1(@l)                              
        
                     msplit#1(::(@x1,@xs)) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  msplit#2(@xs,@x1)                         
        
                           msplit#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  tuple#2(nil(),nil())                      
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @xs' + [2]                            
                                           >= [1] @xs' + [2]                            
                                           =  msplit#3(msplit(@xs'),@x1,@x2)            
        
                       msplit#2(nil(),@x1) =  [1]                                       
                                           >= [1]                                       
                                           =  tuple#2(::(@x1,nil()),nil())              
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l1 + [1] @l2 + [2]                   
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))          
        
***** Step 6.b:4.b:1.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

***** Step 6.b:4.b:1.b:1.b:1: PredecessorEstimationCP WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        PredecessorEstimationCP {onSelectionCP = any intersect of rules of CDG leaf and strict-rules, withComplexityPair = NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}}
    + Details:
        We first use the processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing} to orient following rules strictly:
          1: msplit#(@l) -> c_15(msplit#1#(@l))
          
        Consider the set of all dependency pairs
          1: msplit#(@l) -> c_15(msplit#1#(@l))
          2: mergesort#(@l) -> mergesort#1#(@l)
          3: mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          4: mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          5: mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
          6: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          7: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
          8: msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
          9: msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        Processor NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Nothing}induces the complexity certificateTIME (?,O(n^1))
        SPACE(?,?)on application of the dependency pairs
          {1}
        These cover all (indirect) predecessors of dependency pairs
          {1,8,9}
        their number of applications is equally bounded.
        The dependency pairs are shifted into the weak component.
****** Step 6.b:4.b:1.b:1.b:1.a:1: NaturalMI WORST_CASE(?,O(n^1))
    + Considered Problem:
        - Strict DPs:
            msplit#(@l) -> c_15(msplit#1#(@l))
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        NaturalMI {miDimension = 1, miDegree = 1, miKind = Algebraic, uargs = UArgs, urules = URules, selector = Just first alternative for predecessorEstimation on any intersect of rules of CDG leaf and strict-rules}
    + Details:
        We apply a matrix interpretation of kind constructor based matrix interpretation:
        The following argument positions are considered usable:
          uargs(c_15) = {1},
          uargs(c_16) = {1},
          uargs(c_18) = {1}
        
        Following symbols are considered usable:
          {msplit,msplit#1,msplit#2,msplit#3,#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#,mergesort#
          ,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#,msplit#3#}
        TcT has computed the following interpretation:
                    p(#0) = [1]                           
                   p(#EQ) = [0]                           
                   p(#GT) = [1]                           
                   p(#LT) = [0]                           
                 p(#cklt) = [1]                           
              p(#compare) = [0]                           
                p(#false) = [1]                           
                 p(#less) = [1] x1 + [1]                  
                  p(#neg) = [0]                           
                  p(#pos) = [1] x1 + [4]                  
                    p(#s) = [1] x1 + [4]                  
                 p(#true) = [0]                           
                    p(::) = [1] x2 + [1]                  
                 p(merge) = [1] x1 + [4]                  
               p(merge#1) = [8] x1 + [2] x2 + [2]         
               p(merge#2) = [1] x1 + [1] x2 + [0]         
               p(merge#3) = [4] x3 + [8] x4 + [1]         
             p(mergesort) = [4] x1 + [2]                  
           p(mergesort#1) = [8] x1 + [1]                  
           p(mergesort#2) = [1] x1 + [2] x2 + [0]         
           p(mergesort#3) = [1] x1 + [8]                  
                p(msplit) = [1] x1 + [0]                  
              p(msplit#1) = [1] x1 + [0]                  
              p(msplit#2) = [1] x1 + [1]                  
              p(msplit#3) = [1] x1 + [2]                  
                   p(nil) = [0]                           
               p(tuple#2) = [1] x1 + [1] x2 + [0]         
                p(#cklt#) = [1] x1 + [1]                  
             p(#compare#) = [1] x1 + [1] x2 + [1]         
                p(#less#) = [2] x1 + [4] x2 + [1]         
                p(merge#) = [2] x2 + [1]                  
              p(merge#1#) = [1] x1 + [0]                  
              p(merge#2#) = [1] x1 + [1] x2 + [1] x3 + [1]
              p(merge#3#) = [1] x1 + [1]                  
            p(mergesort#) = [4] x1 + [10]                 
          p(mergesort#1#) = [4] x1 + [10]                 
          p(mergesort#2#) = [4] x1 + [14]                 
          p(mergesort#3#) = [4] x1 + [10]                 
               p(msplit#) = [4] x1 + [4]                  
             p(msplit#1#) = [4] x1 + [0]                  
             p(msplit#2#) = [4] x1 + [0]                  
             p(msplit#3#) = [8] x1 + [2] x2 + [1]         
                   p(c_1) = [2]                           
                   p(c_2) = [1] x1 + [1]                  
                   p(c_3) = [1]                           
                   p(c_4) = [0]                           
                   p(c_5) = [2]                           
                   p(c_6) = [1]                           
                   p(c_7) = [1]                           
                   p(c_8) = [2]                           
                   p(c_9) = [1] x1 + [1]                  
                  p(c_10) = [4] x1 + [2]                  
                  p(c_11) = [2]                           
                  p(c_12) = [1] x1 + [1] x2 + [2]         
                  p(c_13) = [1]                           
                  p(c_14) = [1] x1 + [0]                  
                  p(c_15) = [1] x1 + [3]                  
                  p(c_16) = [1] x1 + [4]                  
                  p(c_17) = [2]                           
                  p(c_18) = [1] x1 + [0]                  
                  p(c_19) = [1]                           
                  p(c_20) = [2]                           
                  p(c_21) = [0]                           
                  p(c_22) = [1]                           
                  p(c_23) = [1]                           
                  p(c_24) = [0]                           
                  p(c_25) = [0]                           
                  p(c_26) = [0]                           
                  p(c_27) = [0]                           
                  p(c_28) = [2]                           
                  p(c_29) = [0]                           
                  p(c_30) = [1]                           
                  p(c_31) = [0]                           
                  p(c_32) = [1]                           
                  p(c_33) = [1]                           
                  p(c_34) = [2]                           
                  p(c_35) = [0]                           
        
        Following rules are strictly oriented:
        msplit#(@l) = [4] @l + [4]       
                    > [4] @l + [3]       
                    = c_15(msplit#1#(@l))
        
        
        Following rules are (at-least) weakly oriented:
                            mergesort#(@l) =  [4] @l + [10]                             
                                           >= [4] @l + [10]                             
                                           =  mergesort#1#(@l)                          
        
                 mergesort#1#(::(@x1,@xs)) =  [4] @xs + [14]                            
                                           >= [4] @xs + [14]                            
                                           =  mergesort#2#(@xs,@x1)                     
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [4] @xs' + [18]                           
                                           >= [4] @xs' + [18]                           
                                           =  mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
        
            mergesort#2#(::(@x2,@xs'),@x1) =  [4] @xs' + [18]                           
                                           >= [4] @xs' + [12]                           
                                           =  msplit#(::(@x1,::(@x2,@xs')))             
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [10]                  
                                           >= [4] @l1 + [10]                            
                                           =  mergesort#(@l1)                           
        
            mergesort#3#(tuple#2(@l1,@l2)) =  [4] @l1 + [4] @l2 + [10]                  
                                           >= [4] @l2 + [10]                            
                                           =  mergesort#(@l2)                           
        
                    msplit#1#(::(@x1,@xs)) =  [4] @xs + [4]                             
                                           >= [4] @xs + [4]                             
                                           =  c_16(msplit#2#(@xs,@x1))                  
        
               msplit#2#(::(@x2,@xs'),@x1) =  [4] @xs' + [4]                            
                                           >= [4] @xs' + [4]                            
                                           =  c_18(msplit#(@xs'))                       
        
                                msplit(@l) =  [1] @l + [0]                              
                                           >= [1] @l + [0]                              
                                           =  msplit#1(@l)                              
        
                     msplit#1(::(@x1,@xs)) =  [1] @xs + [1]                             
                                           >= [1] @xs + [1]                             
                                           =  msplit#2(@xs,@x1)                         
        
                           msplit#1(nil()) =  [0]                                       
                                           >= [0]                                       
                                           =  tuple#2(nil(),nil())                      
        
                msplit#2(::(@x2,@xs'),@x1) =  [1] @xs' + [2]                            
                                           >= [1] @xs' + [2]                            
                                           =  msplit#3(msplit(@xs'),@x1,@x2)            
        
                       msplit#2(nil(),@x1) =  [1]                                       
                                           >= [1]                                       
                                           =  tuple#2(::(@x1,nil()),nil())              
        
        msplit#3(tuple#2(@l1,@l2),@x1,@x2) =  [1] @l1 + [1] @l2 + [2]                   
                                           >= [1] @l1 + [1] @l2 + [2]                   
                                           =  tuple#2(::(@x1,@l1),::(@x2,@l2))          
        
****** Step 6.b:4.b:1.b:1.b:1.a:2: Assumption WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        Assumption {assumed = Certificate {spaceUB = Unknown, spaceLB = Unknown, timeUB = Poly (Just 0), timeLB = Unknown}}
    + Details:
        ()

****** Step 6.b:4.b:1.b:1.b:1.b:1: RemoveWeakSuffixes WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak DPs:
            mergesort#(@l) -> mergesort#1#(@l)
            mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
            mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
            mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
            mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
            msplit#(@l) -> c_15(msplit#1#(@l))
            msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
            msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        RemoveWeakSuffixes
    + Details:
        Consider the dependency graph
          1:W:mergesort#(@l) -> mergesort#1#(@l)
             -->_1 mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1):2
          
          2:W:mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs'))):4
             -->_1 mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs')))):3
          
          3:W:mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2):6
             -->_1 mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1):5
          
          4:W:mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
             -->_1 msplit#(@l) -> c_15(msplit#1#(@l)):7
          
          5:W:mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
             -->_1 mergesort#(@l) -> mergesort#1#(@l):1
          
          6:W:mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
             -->_1 mergesort#(@l) -> mergesort#1#(@l):1
          
          7:W:msplit#(@l) -> c_15(msplit#1#(@l))
             -->_1 msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1)):8
          
          8:W:msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
             -->_1 msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs')):9
          
          9:W:msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
             -->_1 msplit#(@l) -> c_15(msplit#1#(@l)):7
          
        The following weak DPs constitute a sub-graph of the DG that is closed under successors. The DPs are removed.
          1: mergesort#(@l) -> mergesort#1#(@l)
          6: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l2)
          3: mergesort#2#(::(@x2,@xs'),@x1) -> mergesort#3#(msplit(::(@x1,::(@x2,@xs'))))
          2: mergesort#1#(::(@x1,@xs)) -> mergesort#2#(@xs,@x1)
          5: mergesort#3#(tuple#2(@l1,@l2)) -> mergesort#(@l1)
          4: mergesort#2#(::(@x2,@xs'),@x1) -> msplit#(::(@x1,::(@x2,@xs')))
          7: msplit#(@l) -> c_15(msplit#1#(@l))
          9: msplit#2#(::(@x2,@xs'),@x1) -> c_18(msplit#(@xs'))
          8: msplit#1#(::(@x1,@xs)) -> c_16(msplit#2#(@xs,@x1))
****** Step 6.b:4.b:1.b:1.b:1.b:2: EmptyProcessor WORST_CASE(?,O(1))
    + Considered Problem:
        - Weak TRS:
            msplit(@l) -> msplit#1(@l)
            msplit#1(::(@x1,@xs)) -> msplit#2(@xs,@x1)
            msplit#1(nil()) -> tuple#2(nil(),nil())
            msplit#2(::(@x2,@xs'),@x1) -> msplit#3(msplit(@xs'),@x1,@x2)
            msplit#2(nil(),@x1) -> tuple#2(::(@x1,nil()),nil())
            msplit#3(tuple#2(@l1,@l2),@x1,@x2) -> tuple#2(::(@x1,@l1),::(@x2,@l2))
        - Signature:
            {#cklt/1,#compare/2,#less/2,merge/2,merge#1/2,merge#2/3,merge#3/5,mergesort/1,mergesort#1/1,mergesort#2/2
            ,mergesort#3/1,msplit/1,msplit#1/1,msplit#2/2,msplit#3/3,#cklt#/1,#compare#/2,#less#/2,merge#/2,merge#1#/2
            ,merge#2#/3,merge#3#/5,mergesort#/1,mergesort#1#/1,mergesort#2#/2,mergesort#3#/1,msplit#/1,msplit#1#/1
            ,msplit#2#/2,msplit#3#/3} / {#0/0,#EQ/0,#GT/0,#LT/0,#false/0,#neg/1,#pos/1,#s/1,#true/0,::/2,nil/0,tuple#2/2
            ,c_1/2,c_2/1,c_3/1,c_4/0,c_5/1,c_6/0,c_7/1,c_8/1,c_9/1,c_10/1,c_11/0,c_12/2,c_13/0,c_14/2,c_15/1,c_16/1
            ,c_17/0,c_18/1,c_19/0,c_20/0,c_21/0,c_22/0,c_23/0,c_24/0,c_25/0,c_26/0,c_27/0,c_28/0,c_29/1,c_30/0,c_31/0
            ,c_32/0,c_33/1,c_34/0,c_35/1}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {#cklt#,#compare#,#less#,merge#,merge#1#,merge#2#,merge#3#
            ,mergesort#,mergesort#1#,mergesort#2#,mergesort#3#,msplit#,msplit#1#,msplit#2#
            ,msplit#3#} and constructors {#0,#EQ,#GT,#LT,#false,#neg,#pos,#s,#true,::,nil,tuple#2}
    + Applied Processor:
        EmptyProcessor
    + Details:
        The problem is already closed. The intended complexity is O(1).

WORST_CASE(?,O(n^2))