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

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

f(x) → f(g(x))

The set Q consists of the following terms:

f(x0)



QTRS
  ↳ DependencyPairsProof

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

f(x) → f(g(x))

The set Q consists of the following terms:

f(x0)


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(g(x))

The TRS R consists of the following rules:

f(x) → f(g(x))

The set Q consists of the following terms:

f(x0)

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

↳ QTRS
  ↳ DependencyPairsProof
QDP
      ↳ UsableRulesProof
      ↳ UsableRulesProof

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

F(x) → F(g(x))

The TRS R consists of the following rules:

f(x) → f(g(x))

The set Q consists of the following terms:

f(x0)

We have to consider all minimal (P,Q,R)-chains.
As all Q-normal forms are R-normal forms we are in the innermost case. Hence, by the usable rules processor [15] we can delete all non-usable rules [17] from R.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ UsableRulesProof
QDP
          ↳ QReductionProof
      ↳ UsableRulesProof

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

F(x) → F(g(x))

R is empty.
The set Q consists of the following terms:

f(x0)

We have to consider all minimal (P,Q,R)-chains.
We deleted the following terms from Q as each root-symbol of these terms does neither occur in P nor in R.

f(x0)



↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ UsableRulesProof
        ↳ QDP
          ↳ QReductionProof
QDP
              ↳ NonTerminationProof
      ↳ UsableRulesProof

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

F(x) → F(g(x))

R is empty.
Q is empty.
We have to consider all minimal (P,Q,R)-chains.
We used the non-termination processor [17] to show that the DP problem is infinite.
Found a loop by semiunifying a rule from P directly.

The TRS P consists of the following rules:

F(x) → F(g(x))

The TRS R consists of the following rules:none


s = F(x) evaluates to t =F(g(x))

Thus s starts an infinite chain as s semiunifies with t with the following substitutions:




Rewriting sequence

The DP semiunifies directly so there is only one rewrite step from F(x) to F(g(x)).




As all Q-normal forms are R-normal forms we are in the innermost case. Hence, by the usable rules processor [15] we can delete all non-usable rules [17] from R.

↳ QTRS
  ↳ DependencyPairsProof
    ↳ QDP
      ↳ UsableRulesProof
      ↳ UsableRulesProof
QDP

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

F(x) → F(g(x))

R is empty.
The set Q consists of the following terms:

f(x0)

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