(ignored inputs)COMMENT Example 6.2.2 of \cite{BN98}
Rewrite Rules:
   [ f(f(?x,?y),?z) -> f(?x,f(?y,?z)),
     f(i(?x1),?x1) -> e ]
Apply Direct Methods...
Inner CPs:
   [ f(e,?z) = f(i(?x1_1),f(?x1_1,?z)),
     f(f(?x,f(?y,?z)),?z_1) = f(f(?x,?y),f(?z,?z_1)) ]
Outer CPs:
   [  ]
not Overlay, check Termination...
Terminating, not WCR
Knuth&Bendix
Direct Methods: not CR

Final result: not CR
/local-scratch/hzankl/2012/cops2012/6.trs: Success(not CR)
(6 msec.)