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:

f(x) → g(f(x))
g(f(x)) → x
g(x) → a

Q is empty.


QTRS

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

f(x) → g(f(x))
g(f(x)) → x
g(x) → a

Q is empty.