(0) Obligation:

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

f(h(x)) → f(i(x))
f(i(x)) → a
i(x) → h(x)

Q is empty.

(1) QTRSRRRProof (EQUIVALENT transformation)

Used ordering:
Recursive Path Order [RPO].
Precedence:
f1 > [h1, i1, a]

With this ordering the following rules can be removed by the rule removal processor [LPAR04] because they are oriented strictly:

f(i(x)) → a


(2) Obligation:

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

f(h(x)) → f(i(x))
i(x) → h(x)

Q is empty.