* Step 1: Sum WORST_CASE(Omega(n^1),?)
    + Considered Problem:
        - Strict TRS:
            gcd(x,0()) -> x
            gcd(0(),s(y)) -> s(y)
            gcd(s(x),s(y)) -> gcd(mod(s(x),s(y)),mod(s(y),s(x)))
            if(false(),x,y) -> mod(minus(x,y),y)
            if(true(),x,y) -> x
            lt(x,0()) -> false()
            lt(0(),s(x)) -> true()
            lt(s(x),s(y)) -> lt(x,y)
            minus(0(),x) -> 0()
            minus(s(x),0()) -> s(x)
            minus(s(x),s(y)) -> minus(x,y)
            mod(x,0()) -> 0()
            mod(x,s(y)) -> if(lt(x,s(y)),x,s(y))
        - Signature:
            {gcd/2,if/3,lt/2,minus/2,mod/2} / {0/0,false/0,s/1,true/0}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {gcd,if,lt,minus,mod} and constructors {0,false,s,true}
    + Applied Processor:
        Sum {left = someStrategy, right = someStrategy}
    + Details:
        ()
* Step 2: DecreasingLoops WORST_CASE(Omega(n^1),?)
    + Considered Problem:
        - Strict TRS:
            gcd(x,0()) -> x
            gcd(0(),s(y)) -> s(y)
            gcd(s(x),s(y)) -> gcd(mod(s(x),s(y)),mod(s(y),s(x)))
            if(false(),x,y) -> mod(minus(x,y),y)
            if(true(),x,y) -> x
            lt(x,0()) -> false()
            lt(0(),s(x)) -> true()
            lt(s(x),s(y)) -> lt(x,y)
            minus(0(),x) -> 0()
            minus(s(x),0()) -> s(x)
            minus(s(x),s(y)) -> minus(x,y)
            mod(x,0()) -> 0()
            mod(x,s(y)) -> if(lt(x,s(y)),x,s(y))
        - Signature:
            {gcd/2,if/3,lt/2,minus/2,mod/2} / {0/0,false/0,s/1,true/0}
        - Obligation:
            innermost runtime complexity wrt. defined symbols {gcd,if,lt,minus,mod} and constructors {0,false,s,true}
    + Applied Processor:
        DecreasingLoops {bound = AnyLoop, narrow = 10}
    + Details:
        The system has following decreasing Loops:
          lt(x,y){x -> s(x),y -> s(y)} =
            lt(s(x),s(y)) ->^+ lt(x,y)
              = C[lt(x,y) = lt(x,y){}]

WORST_CASE(Omega(n^1),?)