MAYBE
(ignored inputs)COMMENT doi:10.4230/LIPIcs.RTA.2012.165 [37] Example 3.1 ( R' )
Rewrite Rules:
   [ a -> b,
     a -> f(a),
     b -> f(f(b)),
     f(f(f(b))) -> b ]
Apply Direct Methods...
Inner CPs:
   [ f(f(f(f(f(b))))) = b ]
Outer CPs:
   [ b = f(a) ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

Combined result: Can't judge
213.trs: Failure(unknown CR)
(0 msec.)