(0) Obligation:

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

a__ca__f(g(c))
a__f(g(X)) → g(X)
mark(c) → a__c
mark(f(X)) → a__f(X)
mark(g(X)) → g(X)
a__cc
a__f(X) → f(X)

Q is empty.

(1) QTRSRRRProof (EQUIVALENT transformation)

Used ordering:
Lexicographic Path Order [LPO].
Precedence:
mark1 > ac > af1 > f1 > g1
mark1 > ac > c > g1

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

a__ca__f(g(c))
a__f(g(X)) → g(X)
mark(c) → a__c
mark(f(X)) → a__f(X)
mark(g(X)) → g(X)
a__cc
a__f(X) → f(X)


(2) Obligation:

Q restricted rewrite system:
R is empty.
Q is empty.

(3) RisEmptyProof (EQUIVALENT transformation)

The TRS R is empty. Hence, termination is trivially proven.

(4) TRUE