(ignored inputs)COMMENT Example 4.3.3 of \cite{Ohl94thesis}
Rewrite Rules:
   [ F(c(?x)) -> G(?x),
     G(?x) -> F(?x),
     c(?x) -> ?x ]
Apply Direct Methods...
Inner CPs:
   [ F(?x_2) = G(?x_2) ]
Outer CPs:
   [  ]
not Overlay, check Termination...
Terminating, WCR
Knuth&Bendix
Direct Methods: CR

Final result: CR
/local-scratch/hzankl/2012/cops2012/72.trs: Success(CR)
(5 msec.)