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(f(a, x), y) → h(h(f(f(x, f(a, y)), a)))

Q is empty.


QTRS

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

f(f(a, x), y) → h(h(f(f(x, f(a, y)), a)))

Q is empty.