MAYBE
(ignored inputs)COMMENT [120] Example 1 submitted by: Aart Middeldorp
Rewrite Rules:
   [ f(c) -> g(c),
     g(c) -> f(c),
     c -> d ]
Apply Direct Methods...
Inner CPs:
   [ f(d) = g(c),
     g(d) = f(c) ]
Outer CPs:
   [  ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

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