Termination w.r.t. Q of the following Term Rewriting System could be proven:

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

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

Q is empty.


↳ QTRS
  ↳ DependencyPairsProof

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

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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:

G2(cons2(x, k), d) -> G2(k, cons2(x, d))
F2(a, empty) -> G2(a, empty)
F2(a, cons2(x, k)) -> F2(cons2(x, a), k)

The TRS R consists of the following rules:

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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:

G2(cons2(x, k), d) -> G2(k, cons2(x, d))
F2(a, empty) -> G2(a, empty)
F2(a, cons2(x, k)) -> F2(cons2(x, a), k)

The TRS R consists of the following rules:

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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 1 less node.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
            ↳ QDPOrderProof
          ↳ QDP

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

G2(cons2(x, k), d) -> G2(k, cons2(x, d))

The TRS R consists of the following rules:

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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.


G2(cons2(x, k), d) -> G2(k, cons2(x, d))
The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial Order [17,21] with Interpretation:

POL( G2(x1, x2) ) = x1


POL( cons2(x1, x2) ) = x2 + 1



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:

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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
            ↳ QDPOrderProof

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

F2(a, cons2(x, k)) -> F2(cons2(x, a), k)

The TRS R consists of the following rules:

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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.


F2(a, cons2(x, k)) -> F2(cons2(x, a), k)
The remaining pairs can at least be oriented weakly.
none
Used ordering: Polynomial Order [17,21] with Interpretation:

POL( F2(x1, x2) ) = x2


POL( cons2(x1, x2) ) = x2 + 1



The following usable rules [14] were oriented: none



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ DependencyGraphProof
        ↳ AND
          ↳ QDP
          ↳ QDP
            ↳ QDPOrderProof
              ↳ QDP
                ↳ PisEmptyProof

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

f2(a, empty) -> g2(a, empty)
f2(a, cons2(x, k)) -> f2(cons2(x, a), k)
g2(empty, d) -> d
g2(cons2(x, k), d) -> g2(k, cons2(x, d))

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.