Termination w.r.t. Q proof of TRS/TRCSREx8_BLR02_Z.trs

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:

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

Q is empty.

↳ QTRS

  ↳ DependencyPairsProof

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

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

Q is empty.

Using Dependency Pairs [1,13] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

FIB1₂(X, Y) -> ADD₂(X, Y)
SEL₂(s₁(N), cons₂(X, XS)) -> ACTIVATE₁(XS)
ADD₂(s₁(X), Y) -> ADD₂(X, Y)
SEL₂(s₁(N), cons₂(X, XS)) -> SEL₂(N, activate₁(XS))
FIB₁(N) -> SEL₂(N, fib1₂(s₁(0), s₁(0)))
ACTIVATE₁(n__fib1₂(X1, X2)) -> FIB1₂(X1, X2)
FIB₁(N) -> FIB1₂(s₁(0), s₁(0))

The TRS R consists of the following rules:

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

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

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

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

FIB1₂(X, Y) -> ADD₂(X, Y)
SEL₂(s₁(N), cons₂(X, XS)) -> ACTIVATE₁(XS)
ADD₂(s₁(X), Y) -> ADD₂(X, Y)
SEL₂(s₁(N), cons₂(X, XS)) -> SEL₂(N, activate₁(XS))
FIB₁(N) -> SEL₂(N, fib1₂(s₁(0), s₁(0)))
ACTIVATE₁(n__fib1₂(X1, X2)) -> FIB1₂(X1, X2)
FIB₁(N) -> FIB1₂(s₁(0), s₁(0))

The TRS R consists of the following rules:

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 2 SCCs with 5 less nodes.

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ AND

          ↳ QDP

            ↳ QDPOrderProof

          ↳ QDP

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

ADD₂(s₁(X), Y) -> ADD₂(X, Y)

The TRS R consists of the following rules:

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We use the reduction pair processor [13].

The following pairs can be oriented strictly and are deleted.

ADD₂(s₁(X), Y) -> ADD₂(X, Y)

The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial Order [17,21] with Interpretation:

POL( ADD₂(x₁, x₂) ) = max{0, x₁ - 2}

POL( s₁(x₁) ) = x₁ + 3

The following usable rules [14] were oriented: none

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ AND

          ↳ QDP

            ↳ QDPOrderProof

              ↳ QDP

                ↳ PisEmptyProof

          ↳ QDP

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

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

Q is empty.
We have to consider all minimal (P,Q,R)-chains.
The TRS P is empty. Hence, there is no (P,Q,R) chain.

↳ QTRS

  ↳ DependencyPairsProof

    ↳ QDP

      ↳ DependencyGraphProof

        ↳ AND

          ↳ QDP

          ↳ QDP

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

SEL₂(s₁(N), cons₂(X, XS)) -> SEL₂(N, activate₁(XS))

The TRS R consists of the following rules:

fib₁(N) -> sel₂(N, fib1₂(s₁(0), s₁(0)))
fib1₂(X, Y) -> cons₂(X, n__fib1₂(Y, add₂(X, Y)))
add₂(0, X) -> X
add₂(s₁(X), Y) -> s₁(add₂(X, Y))
sel₂(0, cons₂(X, XS)) -> X
sel₂(s₁(N), cons₂(X, XS)) -> sel₂(N, activate₁(XS))
fib1₂(X1, X2) -> n__fib1₂(X1, X2)
activate₁(n__fib1₂(X1, X2)) -> fib1₂(X1, X2)
activate₁(X) -> X

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