(ignored inputs)COMMENT Example 5 of \cite{GTV04}
Rewrite Rules:
   [ -(+(?x,-(?x))) -> 0,
     +(?x,-(?x)) -> 0,
     -(+(0,0)) -> 0,
     +(0,0) -> 0,
     -(0) -> 0 ]
Apply Direct Methods...
Inner CPs:
   [ -(0) = 0,
     -(+(+(0,0),0)) = 0,
     -(+(0,0)) = 0,
     +(+(?x,-(?x)),0) = 0,
     +(+(0,0),0) = 0,
     +(0,0) = 0,
     -(0) = 0,
     -(+(+(?x,-(?x)),0)) = 0 ]
Outer CPs:
   [  ]
not Overlay, check Termination...
Terminating, WCR
Knuth&Bendix
Direct Methods: CR

Final result: CR
/local-scratch/hzankl/2012/cops2012/29.trs: Success(CR)
(1 msec.)