MAYBE
(ignored inputs)COMMENT generated by FORT "NFP & ~CR" submitted by: Franziska Rapp
Rewrite Rules:
   [ a -> a,
     a -> b,
     f(a,a) -> f(b,f(f(a,b),a)) ]
Apply Direct Methods...
Inner CPs:
   [ f(a,a) = f(b,f(f(a,b),a)),
     f(a,a) = f(b,f(f(a,b),a)),
     f(b,a) = f(b,f(f(a,b),a)),
     f(a,b) = f(b,f(f(a,b),a)) ]
Outer CPs:
   [ a = b ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

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