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(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

Q is empty.


↳ QTRS
  ↳ Overlay + Local Confluence

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

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

Q is empty.

The TRS is overlay and locally confluent. By [19] we can switch to innermost.

↳ QTRS
  ↳ Overlay + Local Confluence
    ↳ QTRS
      ↳ DependencyPairsProof

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

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))


Using Dependency Pairs [1,15] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

F(x, f(a, a)) → F(a, x)
F(x, f(a, a)) → F(f(f(a, a), a), f(a, x))
F(x, f(a, a)) → F(f(a, a), a)

The TRS R consists of the following rules:

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))

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

↳ QTRS
  ↳ Overlay + Local Confluence
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof

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

F(x, f(a, a)) → F(a, x)
F(x, f(a, a)) → F(f(f(a, a), a), f(a, x))
F(x, f(a, a)) → F(f(a, a), a)

The TRS R consists of the following rules:

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))

We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 1 SCC with 1 less node.

↳ QTRS
  ↳ Overlay + Local Confluence
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof
            ↳ QDP
              ↳ Instantiation

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

F(x, f(a, a)) → F(a, x)
F(x, f(a, a)) → F(f(f(a, a), a), f(a, x))

The TRS R consists of the following rules:

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))

We have to consider all minimal (P,Q,R)-chains.
By instantiating [15] the rule F(x, f(a, a)) → F(a, x) we obtained the following new rules:

F(f(f(a, a), a), f(a, a)) → F(a, f(f(a, a), a))
F(a, f(a, a)) → F(a, a)



↳ QTRS
  ↳ Overlay + Local Confluence
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof
            ↳ QDP
              ↳ Instantiation
                ↳ QDP
                  ↳ DependencyGraphProof

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

F(x, f(a, a)) → F(f(f(a, a), a), f(a, x))
F(f(f(a, a), a), f(a, a)) → F(a, f(f(a, a), a))
F(a, f(a, a)) → F(a, a)

The TRS R consists of the following rules:

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))

We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 1 SCC with 2 less nodes.

↳ QTRS
  ↳ Overlay + Local Confluence
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof
            ↳ QDP
              ↳ Instantiation
                ↳ QDP
                  ↳ DependencyGraphProof
                    ↳ QDP
                      ↳ Instantiation

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

F(x, f(a, a)) → F(f(f(a, a), a), f(a, x))

The TRS R consists of the following rules:

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))

We have to consider all minimal (P,Q,R)-chains.
By instantiating [15] the rule F(x, f(a, a)) → F(f(f(a, a), a), f(a, x)) we obtained the following new rules:

F(f(f(a, a), a), f(a, a)) → F(f(f(a, a), a), f(a, f(f(a, a), a)))



↳ QTRS
  ↳ Overlay + Local Confluence
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof
            ↳ QDP
              ↳ Instantiation
                ↳ QDP
                  ↳ DependencyGraphProof
                    ↳ QDP
                      ↳ Instantiation
                        ↳ QDP
                          ↳ DependencyGraphProof

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

F(f(f(a, a), a), f(a, a)) → F(f(f(a, a), a), f(a, f(f(a, a), a)))

The TRS R consists of the following rules:

f(x, f(a, a)) → f(f(f(a, a), a), f(a, x))

The set Q consists of the following terms:

f(x0, f(a, a))

We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [15,17,22] contains 0 SCCs with 1 less node.