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:

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

Q is empty.


↳ QTRS
  ↳ AAECC Innermost

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

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

Q is empty.

We have applied [15,7] to switch to innermost. The TRS R 1 is

g(a) → b
g(b) → b

The TRS R 2 is

f(a, y) → f(y, g(y))

The signature Sigma is {f}

↳ QTRS
  ↳ AAECC Innermost
    ↳ QTRS
      ↳ DependencyPairsProof

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

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

The set Q consists of the following terms:

f(a, x0)
g(a)
g(b)


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

F(a, y) → G(y)
F(a, y) → F(y, g(y))

The TRS R consists of the following rules:

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

The set Q consists of the following terms:

f(a, x0)
g(a)
g(b)

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

↳ QTRS
  ↳ AAECC Innermost
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ EdgeDeletionProof

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

F(a, y) → G(y)
F(a, y) → F(y, g(y))

The TRS R consists of the following rules:

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

The set Q consists of the following terms:

f(a, x0)
g(a)
g(b)

We have to consider all minimal (P,Q,R)-chains.
We deleted some edges using various graph approximations

↳ QTRS
  ↳ AAECC Innermost
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ EdgeDeletionProof
            ↳ QDP
              ↳ DependencyGraphProof

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

F(a, y) → F(y, g(y))
F(a, y) → G(y)

The TRS R consists of the following rules:

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

The set Q consists of the following terms:

f(a, x0)
g(a)
g(b)

We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 1 SCC with 1 less node.

↳ QTRS
  ↳ AAECC Innermost
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ EdgeDeletionProof
            ↳ QDP
              ↳ DependencyGraphProof
                ↳ QDP
                  ↳ QDPOrderProof

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

F(a, y) → F(y, g(y))

The TRS R consists of the following rules:

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

The set Q consists of the following terms:

f(a, x0)
g(a)
g(b)

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.


F(a, y) → F(y, g(y))
The remaining pairs can at least be oriented weakly.
none
Used ordering: Combined order from the following AFS and order.
F(x1, x2)  =  F(x1, x2)
a  =  a
g(x1)  =  g
b  =  b

Recursive Path Order [2].
Precedence:
F2 > g > b
a > g > b

The following usable rules [14] were oriented:

g(b) → b
g(a) → b



↳ QTRS
  ↳ AAECC Innermost
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ EdgeDeletionProof
            ↳ QDP
              ↳ DependencyGraphProof
                ↳ QDP
                  ↳ QDPOrderProof
                    ↳ QDP
                      ↳ PisEmptyProof

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

f(a, y) → f(y, g(y))
g(a) → b
g(b) → b

The set Q consists of the following terms:

f(a, x0)
g(a)
g(b)

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