(0) Obligation:

Q restricted rewrite system:
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.

(1) DependencyPairsProof (EQUIVALENT transformation)

Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem.

(2) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ACTIVE(isNatIList(IL)) → ISNATLIST(IL)
ACTIVE(isNat(s(N))) → ISNAT(N)
ACTIVE(isNat(length(L))) → ISNATLIST(L)
ACTIVE(isNatIList(cons(N, IL))) → AND(isNat(N), isNatIList(IL))
ACTIVE(isNatIList(cons(N, IL))) → ISNAT(N)
ACTIVE(isNatIList(cons(N, IL))) → ISNATILIST(IL)
ACTIVE(isNatList(cons(N, L))) → AND(isNat(N), isNatList(L))
ACTIVE(isNatList(cons(N, L))) → ISNAT(N)
ACTIVE(isNatList(cons(N, L))) → ISNATLIST(L)
ACTIVE(isNatList(take(N, IL))) → AND(isNat(N), isNatIList(IL))
ACTIVE(isNatList(take(N, IL))) → ISNAT(N)
ACTIVE(isNatList(take(N, IL))) → ISNATILIST(IL)
ACTIVE(zeros) → CONS(0, zeros)
ACTIVE(take(0, IL)) → UTAKE1(isNatIList(IL))
ACTIVE(take(0, IL)) → ISNATILIST(IL)
ACTIVE(take(s(M), cons(N, IL))) → UTAKE2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL)
ACTIVE(take(s(M), cons(N, IL))) → AND(isNat(M), and(isNat(N), isNatIList(IL)))
ACTIVE(take(s(M), cons(N, IL))) → ISNAT(M)
ACTIVE(take(s(M), cons(N, IL))) → AND(isNat(N), isNatIList(IL))
ACTIVE(take(s(M), cons(N, IL))) → ISNAT(N)
ACTIVE(take(s(M), cons(N, IL))) → ISNATILIST(IL)
ACTIVE(uTake2(tt, M, N, IL)) → CONS(N, take(M, IL))
ACTIVE(uTake2(tt, M, N, IL)) → TAKE(M, IL)
ACTIVE(length(cons(N, L))) → ULENGTH(and(isNat(N), isNatList(L)), L)
ACTIVE(length(cons(N, L))) → AND(isNat(N), isNatList(L))
ACTIVE(length(cons(N, L))) → ISNAT(N)
ACTIVE(length(cons(N, L))) → ISNATLIST(L)
ACTIVE(uLength(tt, L)) → S(length(L))
ACTIVE(uLength(tt, L)) → LENGTH(L)
ACTIVE(and(X1, X2)) → AND(active(X1), X2)
ACTIVE(and(X1, X2)) → ACTIVE(X1)
ACTIVE(and(X1, X2)) → AND(X1, active(X2))
ACTIVE(and(X1, X2)) → ACTIVE(X2)
ACTIVE(s(X)) → S(active(X))
ACTIVE(s(X)) → ACTIVE(X)
ACTIVE(length(X)) → LENGTH(active(X))
ACTIVE(length(X)) → ACTIVE(X)
ACTIVE(cons(X1, X2)) → CONS(active(X1), X2)
ACTIVE(cons(X1, X2)) → ACTIVE(X1)
ACTIVE(take(X1, X2)) → TAKE(active(X1), X2)
ACTIVE(take(X1, X2)) → ACTIVE(X1)
ACTIVE(take(X1, X2)) → TAKE(X1, active(X2))
ACTIVE(take(X1, X2)) → ACTIVE(X2)
ACTIVE(uTake1(X)) → UTAKE1(active(X))
ACTIVE(uTake1(X)) → ACTIVE(X)
ACTIVE(uTake2(X1, X2, X3, X4)) → UTAKE2(active(X1), X2, X3, X4)
ACTIVE(uTake2(X1, X2, X3, X4)) → ACTIVE(X1)
ACTIVE(uLength(X1, X2)) → ULENGTH(active(X1), X2)
ACTIVE(uLength(X1, X2)) → ACTIVE(X1)
AND(mark(X1), X2) → AND(X1, X2)
AND(X1, mark(X2)) → AND(X1, X2)
S(mark(X)) → S(X)
LENGTH(mark(X)) → LENGTH(X)
CONS(mark(X1), X2) → CONS(X1, X2)
TAKE(mark(X1), X2) → TAKE(X1, X2)
TAKE(X1, mark(X2)) → TAKE(X1, X2)
UTAKE1(mark(X)) → UTAKE1(X)
UTAKE2(mark(X1), X2, X3, X4) → UTAKE2(X1, X2, X3, X4)
ULENGTH(mark(X1), X2) → ULENGTH(X1, X2)
PROPER(and(X1, X2)) → AND(proper(X1), proper(X2))
PROPER(and(X1, X2)) → PROPER(X1)
PROPER(and(X1, X2)) → PROPER(X2)
PROPER(isNatIList(X)) → ISNATILIST(proper(X))
PROPER(isNatIList(X)) → PROPER(X)
PROPER(isNatList(X)) → ISNATLIST(proper(X))
PROPER(isNatList(X)) → PROPER(X)
PROPER(isNat(X)) → ISNAT(proper(X))
PROPER(isNat(X)) → PROPER(X)
PROPER(s(X)) → S(proper(X))
PROPER(s(X)) → PROPER(X)
PROPER(length(X)) → LENGTH(proper(X))
PROPER(length(X)) → PROPER(X)
PROPER(cons(X1, X2)) → CONS(proper(X1), proper(X2))
PROPER(cons(X1, X2)) → PROPER(X1)
PROPER(cons(X1, X2)) → PROPER(X2)
PROPER(take(X1, X2)) → TAKE(proper(X1), proper(X2))
PROPER(take(X1, X2)) → PROPER(X1)
PROPER(take(X1, X2)) → PROPER(X2)
PROPER(uTake1(X)) → UTAKE1(proper(X))
PROPER(uTake1(X)) → PROPER(X)
PROPER(uTake2(X1, X2, X3, X4)) → UTAKE2(proper(X1), proper(X2), proper(X3), proper(X4))
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X1)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X2)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X3)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X4)
PROPER(uLength(X1, X2)) → ULENGTH(proper(X1), proper(X2))
PROPER(uLength(X1, X2)) → PROPER(X1)
PROPER(uLength(X1, X2)) → PROPER(X2)
AND(ok(X1), ok(X2)) → AND(X1, X2)
ISNATILIST(ok(X)) → ISNATILIST(X)
ISNATLIST(ok(X)) → ISNATLIST(X)
ISNAT(ok(X)) → ISNAT(X)
S(ok(X)) → S(X)
LENGTH(ok(X)) → LENGTH(X)
CONS(ok(X1), ok(X2)) → CONS(X1, X2)
TAKE(ok(X1), ok(X2)) → TAKE(X1, X2)
UTAKE1(ok(X)) → UTAKE1(X)
UTAKE2(ok(X1), ok(X2), ok(X3), ok(X4)) → UTAKE2(X1, X2, X3, X4)
ULENGTH(ok(X1), ok(X2)) → ULENGTH(X1, X2)
TOP(mark(X)) → TOP(proper(X))
TOP(mark(X)) → PROPER(X)
TOP(ok(X)) → TOP(active(X))
TOP(ok(X)) → ACTIVE(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(3) DependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 14 SCCs with 52 less nodes.

(4) Complex Obligation (AND)

(5) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ISNAT(ok(X)) → ISNAT(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(6) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


ISNAT(ok(X)) → ISNAT(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
ISNAT(x1)  =  ISNAT(x1)
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x2)
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  isNat(x1)
0  =  0
s(x1)  =  s(x1)
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > isNatList1 > and1 > ok1
active1 > isNatList1 > isNatIList1 > isNat1 > ok1
active1 > isNatList1 > isNatIList1 > isNat1 > tt
active1 > 0 > ok1
active1 > 0 > tt
active1 > nil > ok1
active1 > nil > tt
active1 > uTake11 > ok1
active1 > uTake21 > ok1
active1 > uLength2 > s1 > ok1
zeros > 0 > ok1
zeros > 0 > tt
proper1 > isNatList1 > and1 > ok1
proper1 > isNatList1 > isNatIList1 > isNat1 > ok1
proper1 > isNatList1 > isNatIList1 > isNat1 > tt
proper1 > 0 > ok1
proper1 > 0 > tt
proper1 > nil > ok1
proper1 > nil > tt
proper1 > uTake11 > ok1
proper1 > uTake21 > ok1
proper1 > uLength2 > s1 > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(7) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(8) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(9) TRUE

(10) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ISNATLIST(ok(X)) → ISNATLIST(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(11) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


ISNATLIST(ok(X)) → ISNATLIST(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
ISNATLIST(x1)  =  ISNATLIST(x1)
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x2)
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  isNat(x1)
0  =  0
s(x1)  =  s(x1)
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > isNatList1 > and1 > ok1
active1 > isNatList1 > isNatIList1 > isNat1 > ok1
active1 > isNatList1 > isNatIList1 > isNat1 > tt
active1 > 0 > ok1
active1 > 0 > tt
active1 > nil > ok1
active1 > nil > tt
active1 > uTake11 > ok1
active1 > uTake21 > ok1
active1 > uLength2 > s1 > ok1
zeros > 0 > ok1
zeros > 0 > tt
proper1 > isNatList1 > and1 > ok1
proper1 > isNatList1 > isNatIList1 > isNat1 > ok1
proper1 > isNatList1 > isNatIList1 > isNat1 > tt
proper1 > 0 > ok1
proper1 > 0 > tt
proper1 > nil > ok1
proper1 > nil > tt
proper1 > uTake11 > ok1
proper1 > uTake21 > ok1
proper1 > uLength2 > s1 > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(12) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(13) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(14) TRUE

(15) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ISNATILIST(ok(X)) → ISNATILIST(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(16) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


ISNATILIST(ok(X)) → ISNATILIST(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
ISNATILIST(x1)  =  ISNATILIST(x1)
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x2)
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  isNat(x1)
0  =  0
s(x1)  =  s(x1)
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > isNatList1 > and1 > ok1
active1 > isNatList1 > isNatIList1 > isNat1 > ok1
active1 > isNatList1 > isNatIList1 > isNat1 > tt
active1 > 0 > ok1
active1 > 0 > tt
active1 > nil > ok1
active1 > nil > tt
active1 > uTake11 > ok1
active1 > uTake21 > ok1
active1 > uLength2 > s1 > ok1
zeros > 0 > ok1
zeros > 0 > tt
proper1 > isNatList1 > and1 > ok1
proper1 > isNatList1 > isNatIList1 > isNat1 > ok1
proper1 > isNatList1 > isNatIList1 > isNat1 > tt
proper1 > 0 > ok1
proper1 > 0 > tt
proper1 > nil > ok1
proper1 > nil > tt
proper1 > uTake11 > ok1
proper1 > uTake21 > ok1
proper1 > uLength2 > s1 > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(17) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(18) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(19) TRUE

(20) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ULENGTH(ok(X1), ok(X2)) → ULENGTH(X1, X2)
ULENGTH(mark(X1), X2) → ULENGTH(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(21) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


ULENGTH(mark(X1), X2) → ULENGTH(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
ULENGTH(x1, x2)  =  x1
ok(x1)  =  x1
mark(x1)  =  mark(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
top > active1 > isNatList > and2 > mark1
top > active1 > isNatList > isNatIList > mark1
top > active1 > isNatList > isNatIList > tt
top > active1 > isNatList > isNat > mark1
top > active1 > isNatList > isNat > tt
top > active1 > 0 > tt
top > active1 > s1 > and2 > mark1
top > active1 > s1 > isNatIList > mark1
top > active1 > s1 > isNatIList > tt
top > active1 > s1 > isNat > mark1
top > active1 > s1 > isNat > tt
top > active1 > s1 > uTake24 > mark1
top > active1 > length1 > and2 > mark1
top > active1 > length1 > isNat > mark1
top > active1 > length1 > isNat > tt
top > active1 > length1 > uLength2 > mark1
top > active1 > zeros > tt
top > active1 > cons2 > mark1
top > active1 > take2 > and2 > mark1
top > active1 > take2 > isNatIList > mark1
top > active1 > take2 > isNatIList > tt
top > active1 > take2 > isNat > mark1
top > active1 > take2 > isNat > tt
top > active1 > take2 > uTake11 > mark1
top > active1 > take2 > uTake11 > nil > tt
top > active1 > take2 > uTake24 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(22) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ULENGTH(ok(X1), ok(X2)) → ULENGTH(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(23) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


ULENGTH(ok(X1), ok(X2)) → ULENGTH(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
ULENGTH(x1, x2)  =  x1
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > 0 > ok1
active1 > nil > tt > ok1
active1 > uLength2 > s1 > ok1
active1 > uLength2 > length1 > ok1
zeros > tt > ok1
zeros > 0 > ok1
top > proper1 > 0 > ok1
top > proper1 > nil > tt > ok1
top > proper1 > uLength2 > s1 > ok1
top > proper1 > uLength2 > length1 > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(24) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(25) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(26) TRUE

(27) Obligation:

Q DP problem:
The TRS P consists of the following rules:

UTAKE2(ok(X1), ok(X2), ok(X3), ok(X4)) → UTAKE2(X1, X2, X3, X4)
UTAKE2(mark(X1), X2, X3, X4) → UTAKE2(X1, X2, X3, X4)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(28) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


UTAKE2(ok(X1), ok(X2), ok(X3), ok(X4)) → UTAKE2(X1, X2, X3, X4)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
UTAKE2(x1, x2, x3, x4)  =  UTAKE2(x2)
ok(x1)  =  ok(x1)
mark(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  isNat(x1)
0  =  0
s(x1)  =  x1
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x4)
uLength(x1, x2)  =  x2
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
proper1 > isNatIList1 > isNatList1 > tt > ok1 > UTAKE21
proper1 > isNat1 > isNatList1 > tt > ok1 > UTAKE21
proper1 > zeros > tt > ok1 > UTAKE21
proper1 > zeros > 0 > ok1 > UTAKE21
proper1 > nil > ok1 > UTAKE21
proper1 > uTake11 > ok1 > UTAKE21
proper1 > uTake21 > ok1 > UTAKE21
top > active1 > isNatIList1 > isNatList1 > tt > ok1 > UTAKE21
top > active1 > zeros > tt > ok1 > UTAKE21
top > active1 > zeros > 0 > ok1 > UTAKE21
top > active1 > nil > ok1 > UTAKE21
top > active1 > uTake11 > ok1 > UTAKE21
top > active1 > uTake21 > ok1 > UTAKE21

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(29) Obligation:

Q DP problem:
The TRS P consists of the following rules:

UTAKE2(mark(X1), X2, X3, X4) → UTAKE2(X1, X2, X3, X4)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(30) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


UTAKE2(mark(X1), X2, X3, X4) → UTAKE2(X1, X2, X3, X4)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
UTAKE2(x1, x2, x3, x4)  =  UTAKE2(x1, x2)
mark(x1)  =  mark(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  x1
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > and2 > mark1 > UTAKE22
active1 > isNatIList > isNatList > tt > nil > mark1 > UTAKE22
active1 > isNatIList > isNatList > isNat > mark1 > UTAKE22
active1 > s1 > uTake24 > mark1 > UTAKE22
active1 > length1 > isNat > mark1 > UTAKE22
active1 > length1 > uLength2 > mark1 > UTAKE22
active1 > cons2 > uTake24 > mark1 > UTAKE22
active1 > cons2 > uLength2 > mark1 > UTAKE22
active1 > take2 > uTake24 > mark1 > UTAKE22
zeros > 0 > isNatIList > isNatList > tt > nil > mark1 > UTAKE22
zeros > 0 > isNatIList > isNatList > isNat > mark1 > UTAKE22
zeros > cons2 > uTake24 > mark1 > UTAKE22
zeros > cons2 > uLength2 > mark1 > UTAKE22
top > UTAKE22

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(31) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(32) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(33) TRUE

(34) Obligation:

Q DP problem:
The TRS P consists of the following rules:

UTAKE1(ok(X)) → UTAKE1(X)
UTAKE1(mark(X)) → UTAKE1(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(35) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


UTAKE1(ok(X)) → UTAKE1(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
UTAKE1(x1)  =  x1
ok(x1)  =  ok(x1)
mark(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  x1
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  x2
proper(x1)  =  proper
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
proper > ok1 > active1 > zeros > tt > nil
proper > ok1 > active1 > zeros > 0
top > active1 > zeros > tt > nil
top > active1 > zeros > 0

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(36) Obligation:

Q DP problem:
The TRS P consists of the following rules:

UTAKE1(mark(X)) → UTAKE1(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(37) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


UTAKE1(mark(X)) → UTAKE1(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
UTAKE1(x1)  =  x1
mark(x1)  =  mark(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > tt > s1 > isNatIList
active1 > tt > s1 > uTake24 > mark1
active1 > tt > length1 > mark1
active1 > tt > cons2 > isNatList > mark1
active1 > tt > cons2 > isNatList > isNatIList
active1 > tt > cons2 > uTake24 > mark1
active1 > tt > nil > mark1
active1 > tt > take2 > isNatIList
active1 > tt > take2 > uTake24 > mark1
active1 > isNat > proper1 > and2 > mark1
active1 > isNat > proper1 > 0
active1 > isNat > proper1 > zeros
active1 > isNat > proper1 > cons2 > isNatList > mark1
active1 > isNat > proper1 > cons2 > isNatList > isNatIList
active1 > isNat > proper1 > cons2 > uTake24 > mark1
active1 > isNat > proper1 > nil > mark1
active1 > isNat > proper1 > take2 > isNatIList
active1 > isNat > proper1 > take2 > uTake24 > mark1
active1 > isNat > proper1 > uTake11 > mark1
active1 > isNat > proper1 > uLength2 > s1 > isNatIList
active1 > isNat > proper1 > uLength2 > s1 > uTake24 > mark1
active1 > isNat > proper1 > uLength2 > length1 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(38) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(39) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(40) TRUE

(41) Obligation:

Q DP problem:
The TRS P consists of the following rules:

TAKE(X1, mark(X2)) → TAKE(X1, X2)
TAKE(mark(X1), X2) → TAKE(X1, X2)
TAKE(ok(X1), ok(X2)) → TAKE(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(42) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


TAKE(mark(X1), X2) → TAKE(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
TAKE(x1, x2)  =  TAKE(x1)
mark(x1)  =  mark(x1)
ok(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  x1
0  =  0
s(x1)  =  s(x1)
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > and2 > mark1
active1 > isNatList1 > isNatIList1 > tt > mark1
active1 > 0 > isNatIList1 > tt > mark1
active1 > zeros > mark1
active1 > uTake11 > nil > tt > mark1
active1 > uTake24 > cons2 > uLength2 > s1 > mark1
active1 > uTake24 > take2 > mark1
proper1 > and2 > mark1
proper1 > isNatList1 > isNatIList1 > tt > mark1
proper1 > 0 > isNatIList1 > tt > mark1
proper1 > zeros > mark1
proper1 > uTake11 > nil > tt > mark1
proper1 > uTake24 > cons2 > uLength2 > s1 > mark1
proper1 > uTake24 > take2 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(43) Obligation:

Q DP problem:
The TRS P consists of the following rules:

TAKE(X1, mark(X2)) → TAKE(X1, X2)
TAKE(ok(X1), ok(X2)) → TAKE(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(44) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


TAKE(X1, mark(X2)) → TAKE(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
TAKE(x1, x2)  =  TAKE(x2)
mark(x1)  =  mark(x1)
ok(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  x1
0  =  0
s(x1)  =  x1
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > length1 > isNatList1 > mark1 > TAKE1
active1 > length1 > isNatList1 > tt > TAKE1
active1 > length1 > uLength2 > mark1 > TAKE1
active1 > nil > mark1 > TAKE1
active1 > nil > tt > TAKE1
active1 > take2 > isNatIList1 > and2 > mark1 > TAKE1
active1 > take2 > isNatIList1 > isNatList1 > mark1 > TAKE1
active1 > take2 > isNatIList1 > isNatList1 > tt > TAKE1
active1 > take2 > uTake11 > mark1 > TAKE1
active1 > take2 > uTake24 > cons2 > uLength2 > mark1 > TAKE1
proper1 > length1 > isNatList1 > mark1 > TAKE1
proper1 > length1 > isNatList1 > tt > TAKE1
proper1 > length1 > uLength2 > mark1 > TAKE1
proper1 > zeros > 0 > isNatIList1 > and2 > mark1 > TAKE1
proper1 > zeros > 0 > isNatIList1 > isNatList1 > mark1 > TAKE1
proper1 > zeros > 0 > isNatIList1 > isNatList1 > tt > TAKE1
proper1 > zeros > 0 > uTake11 > mark1 > TAKE1
proper1 > zeros > cons2 > uLength2 > mark1 > TAKE1
proper1 > nil > mark1 > TAKE1
proper1 > nil > tt > TAKE1
proper1 > take2 > isNatIList1 > and2 > mark1 > TAKE1
proper1 > take2 > isNatIList1 > isNatList1 > mark1 > TAKE1
proper1 > take2 > isNatIList1 > isNatList1 > tt > TAKE1
proper1 > take2 > uTake11 > mark1 > TAKE1
proper1 > take2 > uTake24 > cons2 > uLength2 > mark1 > TAKE1
top > TAKE1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(45) Obligation:

Q DP problem:
The TRS P consists of the following rules:

TAKE(ok(X1), ok(X2)) → TAKE(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(46) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


TAKE(ok(X1), ok(X2)) → TAKE(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
TAKE(x1, x2)  =  TAKE(x1)
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  x1
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  x2
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
0 > tt > ok1 > TAKE1
0 > uTake11 > ok1 > TAKE1
top > active1 > nil > tt > ok1 > TAKE1
top > active1 > uTake11 > ok1 > TAKE1
top > proper1 > zeros > tt > ok1 > TAKE1
top > proper1 > nil > tt > ok1 > TAKE1
top > proper1 > uTake11 > ok1 > TAKE1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(47) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(48) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(49) TRUE

(50) Obligation:

Q DP problem:
The TRS P consists of the following rules:

CONS(ok(X1), ok(X2)) → CONS(X1, X2)
CONS(mark(X1), X2) → CONS(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(51) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


CONS(mark(X1), X2) → CONS(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
CONS(x1, x2)  =  x1
ok(x1)  =  x1
mark(x1)  =  mark(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
top > active1 > isNatList > and2 > mark1
top > active1 > isNatList > isNatIList > mark1
top > active1 > isNatList > isNatIList > tt
top > active1 > isNatList > isNat > mark1
top > active1 > isNatList > isNat > tt
top > active1 > 0 > tt
top > active1 > s1 > and2 > mark1
top > active1 > s1 > isNatIList > mark1
top > active1 > s1 > isNatIList > tt
top > active1 > s1 > isNat > mark1
top > active1 > s1 > isNat > tt
top > active1 > s1 > uTake24 > mark1
top > active1 > length1 > and2 > mark1
top > active1 > length1 > isNat > mark1
top > active1 > length1 > isNat > tt
top > active1 > length1 > uLength2 > mark1
top > active1 > zeros > tt
top > active1 > cons2 > mark1
top > active1 > take2 > and2 > mark1
top > active1 > take2 > isNatIList > mark1
top > active1 > take2 > isNatIList > tt
top > active1 > take2 > isNat > mark1
top > active1 > take2 > isNat > tt
top > active1 > take2 > uTake11 > mark1
top > active1 > take2 > uTake11 > nil > tt
top > active1 > take2 > uTake24 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(52) Obligation:

Q DP problem:
The TRS P consists of the following rules:

CONS(ok(X1), ok(X2)) → CONS(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(53) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


CONS(ok(X1), ok(X2)) → CONS(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
CONS(x1, x2)  =  x1
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > 0 > ok1
active1 > nil > tt > ok1
active1 > uLength2 > s1 > ok1
active1 > uLength2 > length1 > ok1
zeros > tt > ok1
zeros > 0 > ok1
top > proper1 > 0 > ok1
top > proper1 > nil > tt > ok1
top > proper1 > uLength2 > s1 > ok1
top > proper1 > uLength2 > length1 > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(54) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(55) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(56) TRUE

(57) Obligation:

Q DP problem:
The TRS P consists of the following rules:

LENGTH(ok(X)) → LENGTH(X)
LENGTH(mark(X)) → LENGTH(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(58) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


LENGTH(ok(X)) → LENGTH(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
LENGTH(x1)  =  x1
ok(x1)  =  ok(x1)
mark(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  x1
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  x2
proper(x1)  =  proper
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
proper > ok1 > active1 > zeros > tt > nil
proper > ok1 > active1 > zeros > 0
top > active1 > zeros > tt > nil
top > active1 > zeros > 0

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(59) Obligation:

Q DP problem:
The TRS P consists of the following rules:

LENGTH(mark(X)) → LENGTH(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(60) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


LENGTH(mark(X)) → LENGTH(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
LENGTH(x1)  =  x1
mark(x1)  =  mark(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > tt > s1 > isNatIList
active1 > tt > s1 > uTake24 > mark1
active1 > tt > length1 > mark1
active1 > tt > cons2 > isNatList > mark1
active1 > tt > cons2 > isNatList > isNatIList
active1 > tt > cons2 > uTake24 > mark1
active1 > tt > nil > mark1
active1 > tt > take2 > isNatIList
active1 > tt > take2 > uTake24 > mark1
active1 > isNat > proper1 > and2 > mark1
active1 > isNat > proper1 > 0
active1 > isNat > proper1 > zeros
active1 > isNat > proper1 > cons2 > isNatList > mark1
active1 > isNat > proper1 > cons2 > isNatList > isNatIList
active1 > isNat > proper1 > cons2 > uTake24 > mark1
active1 > isNat > proper1 > nil > mark1
active1 > isNat > proper1 > take2 > isNatIList
active1 > isNat > proper1 > take2 > uTake24 > mark1
active1 > isNat > proper1 > uTake11 > mark1
active1 > isNat > proper1 > uLength2 > s1 > isNatIList
active1 > isNat > proper1 > uLength2 > s1 > uTake24 > mark1
active1 > isNat > proper1 > uLength2 > length1 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(61) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(62) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(63) TRUE

(64) Obligation:

Q DP problem:
The TRS P consists of the following rules:

S(ok(X)) → S(X)
S(mark(X)) → S(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(65) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


S(ok(X)) → S(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
S(x1)  =  x1
ok(x1)  =  ok(x1)
mark(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  x1
length(x1)  =  x1
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  x2
proper(x1)  =  proper
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
proper > ok1 > active1 > zeros > tt > nil
proper > ok1 > active1 > zeros > 0
top > active1 > zeros > tt > nil
top > active1 > zeros > 0

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(66) Obligation:

Q DP problem:
The TRS P consists of the following rules:

S(mark(X)) → S(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(67) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


S(mark(X)) → S(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
S(x1)  =  x1
mark(x1)  =  mark(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > tt > s1 > isNatIList
active1 > tt > s1 > uTake24 > mark1
active1 > tt > length1 > mark1
active1 > tt > cons2 > isNatList > mark1
active1 > tt > cons2 > isNatList > isNatIList
active1 > tt > cons2 > uTake24 > mark1
active1 > tt > nil > mark1
active1 > tt > take2 > isNatIList
active1 > tt > take2 > uTake24 > mark1
active1 > isNat > proper1 > and2 > mark1
active1 > isNat > proper1 > 0
active1 > isNat > proper1 > zeros
active1 > isNat > proper1 > cons2 > isNatList > mark1
active1 > isNat > proper1 > cons2 > isNatList > isNatIList
active1 > isNat > proper1 > cons2 > uTake24 > mark1
active1 > isNat > proper1 > nil > mark1
active1 > isNat > proper1 > take2 > isNatIList
active1 > isNat > proper1 > take2 > uTake24 > mark1
active1 > isNat > proper1 > uTake11 > mark1
active1 > isNat > proper1 > uLength2 > s1 > isNatIList
active1 > isNat > proper1 > uLength2 > s1 > uTake24 > mark1
active1 > isNat > proper1 > uLength2 > length1 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(68) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(69) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(70) TRUE

(71) Obligation:

Q DP problem:
The TRS P consists of the following rules:

AND(X1, mark(X2)) → AND(X1, X2)
AND(mark(X1), X2) → AND(X1, X2)
AND(ok(X1), ok(X2)) → AND(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(72) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


AND(X1, mark(X2)) → AND(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
AND(x1, x2)  =  x2
mark(x1)  =  mark(x1)
ok(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  isNatList(x1)
isNat(x1)  =  x1
0  =  0
s(x1)  =  x1
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > 0 > isNatIList1 > isNatList1 > mark1
active1 > 0 > isNatIList1 > isNatList1 > tt
active1 > 0 > uTake11 > nil > mark1
active1 > 0 > uTake11 > nil > tt
active1 > zeros > tt
active1 > zeros > cons2 > mark1
active1 > uTake24 > cons2 > mark1
active1 > uTake24 > take2 > mark1
active1 > uLength2 > length1 > and2 > mark1
active1 > uLength2 > length1 > isNatList1 > mark1
active1 > uLength2 > length1 > isNatList1 > tt
proper1 > 0 > isNatIList1 > isNatList1 > mark1
proper1 > 0 > isNatIList1 > isNatList1 > tt
proper1 > 0 > uTake11 > nil > mark1
proper1 > 0 > uTake11 > nil > tt
proper1 > zeros > tt
proper1 > zeros > cons2 > mark1
proper1 > uTake24 > cons2 > mark1
proper1 > uTake24 > take2 > mark1
proper1 > uLength2 > length1 > and2 > mark1
proper1 > uLength2 > length1 > isNatList1 > mark1
proper1 > uLength2 > length1 > isNatList1 > tt

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(73) Obligation:

Q DP problem:
The TRS P consists of the following rules:

AND(mark(X1), X2) → AND(X1, X2)
AND(ok(X1), ok(X2)) → AND(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(74) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


AND(mark(X1), X2) → AND(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
AND(x1, x2)  =  x1
mark(x1)  =  mark(x1)
ok(x1)  =  x1
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > and2 > mark1
active1 > isNat > tt > cons2 > mark1
active1 > isNat > tt > nil > mark1
active1 > isNat > tt > take2 > mark1
active1 > isNat > isNatList > mark1
active1 > 0 > tt > cons2 > mark1
active1 > 0 > tt > nil > mark1
active1 > 0 > tt > take2 > mark1
active1 > 0 > isNatIList > mark1
active1 > s1 > mark1
active1 > length1 > uLength2 > mark1
active1 > zeros > tt > cons2 > mark1
active1 > zeros > tt > nil > mark1
active1 > zeros > tt > take2 > mark1
active1 > uTake11 > nil > mark1
active1 > uTake24 > cons2 > mark1
active1 > uTake24 > take2 > mark1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(75) Obligation:

Q DP problem:
The TRS P consists of the following rules:

AND(ok(X1), ok(X2)) → AND(X1, X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(76) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


AND(ok(X1), ok(X2)) → AND(X1, X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
AND(x1, x2)  =  x1
ok(x1)  =  ok(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
mark(x1)  =  x1
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
0  =  0
s(x1)  =  s(x1)
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  x2
nil  =  nil
take(x1, x2)  =  x2
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  x4
uLength(x1, x2)  =  uLength(x1, x2)
proper(x1)  =  proper(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > 0 > ok1
active1 > nil > tt > ok1
active1 > uLength2 > s1 > ok1
active1 > uLength2 > length1 > ok1
zeros > tt > ok1
zeros > 0 > ok1
top > proper1 > 0 > ok1
top > proper1 > nil > tt > ok1
top > proper1 > uLength2 > s1 > ok1
top > proper1 > uLength2 > length1 > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(77) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(78) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(79) TRUE

(80) Obligation:

Q DP problem:
The TRS P consists of the following rules:

PROPER(and(X1, X2)) → PROPER(X2)
PROPER(and(X1, X2)) → PROPER(X1)
PROPER(isNatIList(X)) → PROPER(X)
PROPER(isNatList(X)) → PROPER(X)
PROPER(isNat(X)) → PROPER(X)
PROPER(s(X)) → PROPER(X)
PROPER(length(X)) → PROPER(X)
PROPER(cons(X1, X2)) → PROPER(X1)
PROPER(cons(X1, X2)) → PROPER(X2)
PROPER(take(X1, X2)) → PROPER(X1)
PROPER(take(X1, X2)) → PROPER(X2)
PROPER(uTake1(X)) → PROPER(X)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X1)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X2)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X3)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X4)
PROPER(uLength(X1, X2)) → PROPER(X1)
PROPER(uLength(X1, X2)) → PROPER(X2)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(81) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


PROPER(and(X1, X2)) → PROPER(X2)
PROPER(and(X1, X2)) → PROPER(X1)
PROPER(cons(X1, X2)) → PROPER(X1)
PROPER(cons(X1, X2)) → PROPER(X2)
PROPER(take(X1, X2)) → PROPER(X1)
PROPER(take(X1, X2)) → PROPER(X2)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X1)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X2)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X3)
PROPER(uTake2(X1, X2, X3, X4)) → PROPER(X4)
PROPER(uLength(X1, X2)) → PROPER(X1)
PROPER(uLength(X1, X2)) → PROPER(X2)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
PROPER(x1)  =  PROPER(x1)
and(x1, x2)  =  and(x1, x2)
isNatIList(x1)  =  x1
isNatList(x1)  =  x1
isNat(x1)  =  x1
s(x1)  =  x1
length(x1)  =  x1
cons(x1, x2)  =  cons(x1, x2)
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3, x4)
uLength(x1, x2)  =  uLength(x1, x2)
active(x1)  =  active(x1)
tt  =  tt
mark(x1)  =  mark
0  =  0
zeros  =  zeros
nil  =  nil
proper(x1)  =  proper(x1)
ok(x1)  =  ok(x1)
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
nil > mark > proper1 > cons2 > PROPER1
nil > mark > proper1 > cons2 > and2 > ok1
nil > mark > proper1 > cons2 > uTake24 > ok1
nil > mark > proper1 > cons2 > uLength2 > ok1
nil > mark > proper1 > 0 > tt > take2 > uTake24 > ok1
nil > mark > proper1 > zeros > ok1
top > active1 > mark > proper1 > cons2 > PROPER1
top > active1 > mark > proper1 > cons2 > and2 > ok1
top > active1 > mark > proper1 > cons2 > uTake24 > ok1
top > active1 > mark > proper1 > cons2 > uLength2 > ok1
top > active1 > mark > proper1 > 0 > tt > take2 > uTake24 > ok1
top > active1 > mark > proper1 > zeros > ok1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(82) Obligation:

Q DP problem:
The TRS P consists of the following rules:

PROPER(isNatIList(X)) → PROPER(X)
PROPER(isNatList(X)) → PROPER(X)
PROPER(isNat(X)) → PROPER(X)
PROPER(s(X)) → PROPER(X)
PROPER(length(X)) → PROPER(X)
PROPER(uTake1(X)) → PROPER(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(83) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


PROPER(isNatIList(X)) → PROPER(X)
PROPER(isNat(X)) → PROPER(X)
PROPER(length(X)) → PROPER(X)
PROPER(uTake1(X)) → PROPER(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
PROPER(x1)  =  PROPER(x1)
isNatIList(x1)  =  isNatIList(x1)
isNatList(x1)  =  x1
isNat(x1)  =  isNat(x1)
s(x1)  =  x1
length(x1)  =  length(x1)
uTake1(x1)  =  uTake1(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  x2
tt  =  tt
mark(x1)  =  mark
0  =  0
zeros  =  zeros
cons(x1, x2)  =  cons
nil  =  nil
take(x1, x2)  =  take(x2)
uTake2(x1, x2, x3, x4)  =  uTake2
uLength(x1, x2)  =  uLength
proper(x1)  =  proper(x1)
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
cons > uTake2 > active1 > isNatIList1 > PROPER1 > mark
cons > uTake2 > active1 > isNat1 > PROPER1 > mark
cons > uTake2 > active1 > length1 > PROPER1 > mark
cons > uTake2 > active1 > uTake11 > PROPER1 > mark
cons > uTake2 > active1 > tt > mark
cons > uTake2 > active1 > 0 > mark
cons > uTake2 > active1 > zeros > mark
cons > uTake2 > active1 > take1 > mark
cons > uTake2 > proper1 > isNatIList1 > PROPER1 > mark
cons > uTake2 > proper1 > isNat1 > PROPER1 > mark
cons > uTake2 > proper1 > length1 > PROPER1 > mark
cons > uTake2 > proper1 > uTake11 > PROPER1 > mark
cons > uTake2 > proper1 > tt > mark
cons > uTake2 > proper1 > 0 > mark
cons > uTake2 > proper1 > zeros > mark
cons > uTake2 > proper1 > take1 > mark
cons > uLength > active1 > isNatIList1 > PROPER1 > mark
cons > uLength > active1 > isNat1 > PROPER1 > mark
cons > uLength > active1 > length1 > PROPER1 > mark
cons > uLength > active1 > uTake11 > PROPER1 > mark
cons > uLength > active1 > tt > mark
cons > uLength > active1 > 0 > mark
cons > uLength > active1 > zeros > mark
cons > uLength > active1 > take1 > mark
cons > uLength > proper1 > isNatIList1 > PROPER1 > mark
cons > uLength > proper1 > isNat1 > PROPER1 > mark
cons > uLength > proper1 > length1 > PROPER1 > mark
cons > uLength > proper1 > uTake11 > PROPER1 > mark
cons > uLength > proper1 > tt > mark
cons > uLength > proper1 > 0 > mark
cons > uLength > proper1 > zeros > mark
cons > uLength > proper1 > take1 > mark
nil > tt > mark
top > active1 > isNatIList1 > PROPER1 > mark
top > active1 > isNat1 > PROPER1 > mark
top > active1 > length1 > PROPER1 > mark
top > active1 > uTake11 > PROPER1 > mark
top > active1 > tt > mark
top > active1 > 0 > mark
top > active1 > zeros > mark
top > active1 > take1 > mark
top > proper1 > isNatIList1 > PROPER1 > mark
top > proper1 > isNat1 > PROPER1 > mark
top > proper1 > length1 > PROPER1 > mark
top > proper1 > uTake11 > PROPER1 > mark
top > proper1 > tt > mark
top > proper1 > 0 > mark
top > proper1 > zeros > mark
top > proper1 > take1 > mark

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(84) Obligation:

Q DP problem:
The TRS P consists of the following rules:

PROPER(isNatList(X)) → PROPER(X)
PROPER(s(X)) → PROPER(X)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(85) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


PROPER(isNatList(X)) → PROPER(X)
PROPER(s(X)) → PROPER(X)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
PROPER(x1)  =  x1
isNatList(x1)  =  isNatList(x1)
s(x1)  =  s(x1)
active(x1)  =  active(x1)
and(x1, x2)  =  and(x1, x2)
tt  =  tt
mark(x1)  =  mark
isNatIList(x1)  =  isNatIList(x1)
isNat(x1)  =  isNat(x1)
0  =  0
length(x1)  =  length(x1)
zeros  =  zeros
cons(x1, x2)  =  cons(x1, x2)
nil  =  nil
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  x1
uTake2(x1, x2, x3, x4)  =  uTake2(x3, x4)
uLength(x1, x2)  =  uLength(x1)
proper(x1)  =  proper(x1)
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
active1 > isNatList1 > mark > s1 > isNat1
active1 > isNatList1 > mark > cons2
active1 > isNatList1 > mark > uLength1
active1 > isNatList1 > isNatIList1 > isNat1
active1 > and2 > mark > s1 > isNat1
active1 > and2 > mark > cons2
active1 > and2 > mark > uLength1
active1 > 0 > mark > s1 > isNat1
active1 > 0 > mark > cons2
active1 > 0 > mark > uLength1
active1 > 0 > isNatIList1 > isNat1
active1 > length1 > isNat1
active1 > length1 > uLength1
active1 > zeros > cons2
active1 > nil
active1 > uTake22 > mark > s1 > isNat1
active1 > uTake22 > mark > cons2
active1 > uTake22 > mark > uLength1
active1 > uTake22 > take2 > isNatIList1 > isNat1
tt > mark > s1 > isNat1
tt > mark > cons2
tt > mark > uLength1
tt > length1 > isNat1
tt > length1 > uLength1
tt > nil
tt > take2 > isNatIList1 > isNat1
proper1 > isNatList1 > mark > s1 > isNat1
proper1 > isNatList1 > mark > cons2
proper1 > isNatList1 > mark > uLength1
proper1 > isNatList1 > isNatIList1 > isNat1
proper1 > and2 > mark > s1 > isNat1
proper1 > and2 > mark > cons2
proper1 > and2 > mark > uLength1
proper1 > 0 > mark > s1 > isNat1
proper1 > 0 > mark > cons2
proper1 > 0 > mark > uLength1
proper1 > 0 > isNatIList1 > isNat1
proper1 > length1 > isNat1
proper1 > length1 > uLength1
proper1 > zeros > cons2
proper1 > nil
proper1 > uTake22 > mark > s1 > isNat1
proper1 > uTake22 > mark > cons2
proper1 > uTake22 > mark > uLength1
proper1 > uTake22 > take2 > isNatIList1 > isNat1

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(86) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(87) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(88) TRUE

(89) Obligation:

Q DP problem:
The TRS P consists of the following rules:

ACTIVE(and(X1, X2)) → ACTIVE(X2)
ACTIVE(and(X1, X2)) → ACTIVE(X1)
ACTIVE(s(X)) → ACTIVE(X)
ACTIVE(length(X)) → ACTIVE(X)
ACTIVE(cons(X1, X2)) → ACTIVE(X1)
ACTIVE(take(X1, X2)) → ACTIVE(X1)
ACTIVE(take(X1, X2)) → ACTIVE(X2)
ACTIVE(uTake1(X)) → ACTIVE(X)
ACTIVE(uTake2(X1, X2, X3, X4)) → ACTIVE(X1)
ACTIVE(uLength(X1, X2)) → ACTIVE(X1)

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(90) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].


The following pairs can be oriented strictly and are deleted.


ACTIVE(and(X1, X2)) → ACTIVE(X2)
ACTIVE(and(X1, X2)) → ACTIVE(X1)
ACTIVE(s(X)) → ACTIVE(X)
ACTIVE(length(X)) → ACTIVE(X)
ACTIVE(cons(X1, X2)) → ACTIVE(X1)
ACTIVE(take(X1, X2)) → ACTIVE(X1)
ACTIVE(take(X1, X2)) → ACTIVE(X2)
ACTIVE(uTake1(X)) → ACTIVE(X)
ACTIVE(uTake2(X1, X2, X3, X4)) → ACTIVE(X1)
ACTIVE(uLength(X1, X2)) → ACTIVE(X1)
The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
ACTIVE(x1)  =  ACTIVE(x1)
and(x1, x2)  =  and(x1, x2)
s(x1)  =  s(x1)
length(x1)  =  length(x1)
cons(x1, x2)  =  cons(x1)
take(x1, x2)  =  take(x1, x2)
uTake1(x1)  =  uTake1(x1)
uTake2(x1, x2, x3, x4)  =  uTake2(x1, x2, x3)
uLength(x1, x2)  =  uLength(x1, x2)
active(x1)  =  active(x1)
tt  =  tt
mark(x1)  =  mark
isNatIList(x1)  =  isNatIList
isNatList(x1)  =  isNatList
isNat(x1)  =  isNat
0  =  0
zeros  =  zeros
nil  =  nil
proper(x1)  =  proper(x1)
ok(x1)  =  x1
top(x1)  =  top

Lexicographic Path Order [LPO].
Precedence:
ACTIVE1 > uLength2
active1 > mark > proper1 > s1 > and2 > uLength2
active1 > mark > proper1 > length1 > and2 > uLength2
active1 > mark > proper1 > take2 > and2 > uLength2
active1 > mark > proper1 > take2 > uTake11 > nil > uLength2
active1 > mark > proper1 > uTake23 > cons1 > and2 > uLength2
active1 > mark > proper1 > tt > nil > uLength2
active1 > mark > proper1 > zeros > uLength2
active1 > mark > top > uLength2
active1 > isNatList > isNatIList > isNat > tt > nil > uLength2
active1 > isNatList > isNatIList > proper1 > s1 > and2 > uLength2
active1 > isNatList > isNatIList > proper1 > length1 > and2 > uLength2
active1 > isNatList > isNatIList > proper1 > take2 > and2 > uLength2
active1 > isNatList > isNatIList > proper1 > take2 > uTake11 > nil > uLength2
active1 > isNatList > isNatIList > proper1 > uTake23 > cons1 > and2 > uLength2
active1 > isNatList > isNatIList > proper1 > tt > nil > uLength2
active1 > isNatList > isNatIList > proper1 > zeros > uLength2
active1 > 0 > uTake11 > nil > uLength2
active1 > 0 > tt > nil > uLength2

The following usable rules [FROCOS05] were oriented:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

(91) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.

(92) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(93) TRUE

(94) Obligation:

Q DP problem:
The TRS P consists of the following rules:

TOP(ok(X)) → TOP(active(X))
TOP(mark(X)) → TOP(proper(X))

The TRS R consists of the following rules:

active(and(tt, T)) → mark(T)
active(isNatIList(IL)) → mark(isNatList(IL))
active(isNat(0)) → mark(tt)
active(isNat(s(N))) → mark(isNat(N))
active(isNat(length(L))) → mark(isNatList(L))
active(isNatIList(zeros)) → mark(tt)
active(isNatIList(cons(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(isNatList(nil)) → mark(tt)
active(isNatList(cons(N, L))) → mark(and(isNat(N), isNatList(L)))
active(isNatList(take(N, IL))) → mark(and(isNat(N), isNatIList(IL)))
active(zeros) → mark(cons(0, zeros))
active(take(0, IL)) → mark(uTake1(isNatIList(IL)))
active(uTake1(tt)) → mark(nil)
active(take(s(M), cons(N, IL))) → mark(uTake2(and(isNat(M), and(isNat(N), isNatIList(IL))), M, N, IL))
active(uTake2(tt, M, N, IL)) → mark(cons(N, take(M, IL)))
active(length(cons(N, L))) → mark(uLength(and(isNat(N), isNatList(L)), L))
active(uLength(tt, L)) → mark(s(length(L)))
active(and(X1, X2)) → and(active(X1), X2)
active(and(X1, X2)) → and(X1, active(X2))
active(s(X)) → s(active(X))
active(length(X)) → length(active(X))
active(cons(X1, X2)) → cons(active(X1), X2)
active(take(X1, X2)) → take(active(X1), X2)
active(take(X1, X2)) → take(X1, active(X2))
active(uTake1(X)) → uTake1(active(X))
active(uTake2(X1, X2, X3, X4)) → uTake2(active(X1), X2, X3, X4)
active(uLength(X1, X2)) → uLength(active(X1), X2)
and(mark(X1), X2) → mark(and(X1, X2))
and(X1, mark(X2)) → mark(and(X1, X2))
s(mark(X)) → mark(s(X))
length(mark(X)) → mark(length(X))
cons(mark(X1), X2) → mark(cons(X1, X2))
take(mark(X1), X2) → mark(take(X1, X2))
take(X1, mark(X2)) → mark(take(X1, X2))
uTake1(mark(X)) → mark(uTake1(X))
uTake2(mark(X1), X2, X3, X4) → mark(uTake2(X1, X2, X3, X4))
uLength(mark(X1), X2) → mark(uLength(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(tt) → ok(tt)
proper(isNatIList(X)) → isNatIList(proper(X))
proper(isNatList(X)) → isNatList(proper(X))
proper(isNat(X)) → isNat(proper(X))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(length(X)) → length(proper(X))
proper(zeros) → ok(zeros)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(take(X1, X2)) → take(proper(X1), proper(X2))
proper(uTake1(X)) → uTake1(proper(X))
proper(uTake2(X1, X2, X3, X4)) → uTake2(proper(X1), proper(X2), proper(X3), proper(X4))
proper(uLength(X1, X2)) → uLength(proper(X1), proper(X2))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
isNatIList(ok(X)) → ok(isNatIList(X))
isNatList(ok(X)) → ok(isNatList(X))
isNat(ok(X)) → ok(isNat(X))
s(ok(X)) → ok(s(X))
length(ok(X)) → ok(length(X))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
take(ok(X1), ok(X2)) → ok(take(X1, X2))
uTake1(ok(X)) → ok(uTake1(X))
uTake2(ok(X1), ok(X2), ok(X3), ok(X4)) → ok(uTake2(X1, X2, X3, X4))
uLength(ok(X1), ok(X2)) → ok(uLength(X1, X2))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Q is empty.
We have to consider all minimal (P,Q,R)-chains.