MAYBE
(ignored inputs)COMMENT [11] Example 3.3.1 submitted by: Takahito Aoto , Junichi Yoshida , and Yoshihito Toyama
Rewrite Rules:
   [ b -> a,
     b -> c,
     c -> b,
     c -> d ]
Apply Direct Methods...
Inner CPs:
   [  ]
Outer CPs:
   [ a = c,
     b = d ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

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