(ignored inputs)COMMENT from p.209 of \cite{Der97}
Rewrite Rules:
   [ f(?x) -> g(a),
     g(?x) -> ?x,
     h(?x,?x) -> 0,
     a -> 1 ]
Apply Direct Methods...
Inner CPs:
   [  ]
Outer CPs:
   [  ]
Overlay, check Innermost Termination...
Innermost Terminating (hence Terminating), WCR
Knuth&Bendix
Direct Methods: CR

Final result: CR
/local-scratch/hzankl/2012/cops2012/18.trs: Success(CR)
(1 msec.)