Termination w.r.t. Q of the following Term Rewriting System could not be shown:
Q restricted rewrite system:
The TRS R consists of the following rules:
a__from1(X) -> cons2(mark1(X), from1(s1(X)))
a__head1(cons2(X, XS)) -> mark1(X)
a__2nd1(cons2(X, XS)) -> a__head1(mark1(XS))
a__take2(0, XS) -> nil
a__take2(s1(N), cons2(X, XS)) -> cons2(mark1(X), take2(N, XS))
a__sel2(0, cons2(X, XS)) -> mark1(X)
a__sel2(s1(N), cons2(X, XS)) -> a__sel2(mark1(N), mark1(XS))
mark1(from1(X)) -> a__from1(mark1(X))
mark1(head1(X)) -> a__head1(mark1(X))
mark1(2nd1(X)) -> a__2nd1(mark1(X))
mark1(take2(X1, X2)) -> a__take2(mark1(X1), mark1(X2))
mark1(sel2(X1, X2)) -> a__sel2(mark1(X1), mark1(X2))
mark1(cons2(X1, X2)) -> cons2(mark1(X1), X2)
mark1(s1(X)) -> s1(mark1(X))
mark1(0) -> 0
mark1(nil) -> nil
a__from1(X) -> from1(X)
a__head1(X) -> head1(X)
a__2nd1(X) -> 2nd1(X)
a__take2(X1, X2) -> take2(X1, X2)
a__sel2(X1, X2) -> sel2(X1, X2)
Q is empty.
↳ QTRS
↳ DependencyPairsProof
Q restricted rewrite system:
The TRS R consists of the following rules:
a__from1(X) -> cons2(mark1(X), from1(s1(X)))
a__head1(cons2(X, XS)) -> mark1(X)
a__2nd1(cons2(X, XS)) -> a__head1(mark1(XS))
a__take2(0, XS) -> nil
a__take2(s1(N), cons2(X, XS)) -> cons2(mark1(X), take2(N, XS))
a__sel2(0, cons2(X, XS)) -> mark1(X)
a__sel2(s1(N), cons2(X, XS)) -> a__sel2(mark1(N), mark1(XS))
mark1(from1(X)) -> a__from1(mark1(X))
mark1(head1(X)) -> a__head1(mark1(X))
mark1(2nd1(X)) -> a__2nd1(mark1(X))
mark1(take2(X1, X2)) -> a__take2(mark1(X1), mark1(X2))
mark1(sel2(X1, X2)) -> a__sel2(mark1(X1), mark1(X2))
mark1(cons2(X1, X2)) -> cons2(mark1(X1), X2)
mark1(s1(X)) -> s1(mark1(X))
mark1(0) -> 0
mark1(nil) -> nil
a__from1(X) -> from1(X)
a__head1(X) -> head1(X)
a__2nd1(X) -> 2nd1(X)
a__take2(X1, X2) -> take2(X1, X2)
a__sel2(X1, X2) -> sel2(X1, X2)
Q is empty.
Q DP problem:
The TRS P consists of the following rules:
MARK1(take2(X1, X2)) -> MARK1(X2)
A__SEL2(0, cons2(X, XS)) -> MARK1(X)
MARK1(2nd1(X)) -> MARK1(X)
MARK1(sel2(X1, X2)) -> A__SEL2(mark1(X1), mark1(X2))
A__2ND1(cons2(X, XS)) -> MARK1(XS)
MARK1(take2(X1, X2)) -> MARK1(X1)
A__SEL2(s1(N), cons2(X, XS)) -> A__SEL2(mark1(N), mark1(XS))
MARK1(head1(X)) -> A__HEAD1(mark1(X))
MARK1(sel2(X1, X2)) -> MARK1(X2)
A__SEL2(s1(N), cons2(X, XS)) -> MARK1(XS)
MARK1(head1(X)) -> MARK1(X)
MARK1(sel2(X1, X2)) -> MARK1(X1)
MARK1(take2(X1, X2)) -> A__TAKE2(mark1(X1), mark1(X2))
MARK1(s1(X)) -> MARK1(X)
A__2ND1(cons2(X, XS)) -> A__HEAD1(mark1(XS))
MARK1(from1(X)) -> MARK1(X)
A__TAKE2(s1(N), cons2(X, XS)) -> MARK1(X)
MARK1(from1(X)) -> A__FROM1(mark1(X))
A__HEAD1(cons2(X, XS)) -> MARK1(X)
MARK1(cons2(X1, X2)) -> MARK1(X1)
MARK1(2nd1(X)) -> A__2ND1(mark1(X))
A__FROM1(X) -> MARK1(X)
A__SEL2(s1(N), cons2(X, XS)) -> MARK1(N)
The TRS R consists of the following rules:
a__from1(X) -> cons2(mark1(X), from1(s1(X)))
a__head1(cons2(X, XS)) -> mark1(X)
a__2nd1(cons2(X, XS)) -> a__head1(mark1(XS))
a__take2(0, XS) -> nil
a__take2(s1(N), cons2(X, XS)) -> cons2(mark1(X), take2(N, XS))
a__sel2(0, cons2(X, XS)) -> mark1(X)
a__sel2(s1(N), cons2(X, XS)) -> a__sel2(mark1(N), mark1(XS))
mark1(from1(X)) -> a__from1(mark1(X))
mark1(head1(X)) -> a__head1(mark1(X))
mark1(2nd1(X)) -> a__2nd1(mark1(X))
mark1(take2(X1, X2)) -> a__take2(mark1(X1), mark1(X2))
mark1(sel2(X1, X2)) -> a__sel2(mark1(X1), mark1(X2))
mark1(cons2(X1, X2)) -> cons2(mark1(X1), X2)
mark1(s1(X)) -> s1(mark1(X))
mark1(0) -> 0
mark1(nil) -> nil
a__from1(X) -> from1(X)
a__head1(X) -> head1(X)
a__2nd1(X) -> 2nd1(X)
a__take2(X1, X2) -> take2(X1, X2)
a__sel2(X1, X2) -> sel2(X1, X2)
Q is empty.
We have to consider all minimal (P,Q,R)-chains.
↳ QTRS
↳ DependencyPairsProof
↳ QDP
Q DP problem:
The TRS P consists of the following rules:
MARK1(take2(X1, X2)) -> MARK1(X2)
A__SEL2(0, cons2(X, XS)) -> MARK1(X)
MARK1(2nd1(X)) -> MARK1(X)
MARK1(sel2(X1, X2)) -> A__SEL2(mark1(X1), mark1(X2))
A__2ND1(cons2(X, XS)) -> MARK1(XS)
MARK1(take2(X1, X2)) -> MARK1(X1)
A__SEL2(s1(N), cons2(X, XS)) -> A__SEL2(mark1(N), mark1(XS))
MARK1(head1(X)) -> A__HEAD1(mark1(X))
MARK1(sel2(X1, X2)) -> MARK1(X2)
A__SEL2(s1(N), cons2(X, XS)) -> MARK1(XS)
MARK1(head1(X)) -> MARK1(X)
MARK1(sel2(X1, X2)) -> MARK1(X1)
MARK1(take2(X1, X2)) -> A__TAKE2(mark1(X1), mark1(X2))
MARK1(s1(X)) -> MARK1(X)
A__2ND1(cons2(X, XS)) -> A__HEAD1(mark1(XS))
MARK1(from1(X)) -> MARK1(X)
A__TAKE2(s1(N), cons2(X, XS)) -> MARK1(X)
MARK1(from1(X)) -> A__FROM1(mark1(X))
A__HEAD1(cons2(X, XS)) -> MARK1(X)
MARK1(cons2(X1, X2)) -> MARK1(X1)
MARK1(2nd1(X)) -> A__2ND1(mark1(X))
A__FROM1(X) -> MARK1(X)
A__SEL2(s1(N), cons2(X, XS)) -> MARK1(N)
The TRS R consists of the following rules:
a__from1(X) -> cons2(mark1(X), from1(s1(X)))
a__head1(cons2(X, XS)) -> mark1(X)
a__2nd1(cons2(X, XS)) -> a__head1(mark1(XS))
a__take2(0, XS) -> nil
a__take2(s1(N), cons2(X, XS)) -> cons2(mark1(X), take2(N, XS))
a__sel2(0, cons2(X, XS)) -> mark1(X)
a__sel2(s1(N), cons2(X, XS)) -> a__sel2(mark1(N), mark1(XS))
mark1(from1(X)) -> a__from1(mark1(X))
mark1(head1(X)) -> a__head1(mark1(X))
mark1(2nd1(X)) -> a__2nd1(mark1(X))
mark1(take2(X1, X2)) -> a__take2(mark1(X1), mark1(X2))
mark1(sel2(X1, X2)) -> a__sel2(mark1(X1), mark1(X2))
mark1(cons2(X1, X2)) -> cons2(mark1(X1), X2)
mark1(s1(X)) -> s1(mark1(X))
mark1(0) -> 0
mark1(nil) -> nil
a__from1(X) -> from1(X)
a__head1(X) -> head1(X)
a__2nd1(X) -> 2nd1(X)
a__take2(X1, X2) -> take2(X1, X2)
a__sel2(X1, X2) -> sel2(X1, X2)
Q is empty.
We have to consider all minimal (P,Q,R)-chains.