MAYBE
(ignored inputs)COMMENT doi:10.1007/BFb0052357 [21] TRS R_2 submitted by: Takahito Aoto , Junichi Yoshida , and Yoshihito Toyama
Rewrite Rules:
   [ a -> c,
     b -> c,
     f(a,b) -> d,
     f(?x,c) -> f(c,c),
     f(c,?x) -> f(c,c),
     d -> f(a,c),
     d -> f(c,b) ]
Apply Direct Methods...
Inner CPs:
   [ f(c,b) = d,
     f(a,c) = d ]
Outer CPs:
   [ f(c,c) = f(c,c),
     f(a,c) = f(c,b) ]
Linear
(inner) Parallel CPs:
   [ f(a,c) = d {},
     f(c,b) = d {},
     f(c,c) = d {} ]
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

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