(ignored inputs)COMMENT Example 8 of \cite{Gra96caap}
Rewrite Rules:
   [ f(a,a) -> g(f(a,a)),
     a -> b,
     f(b,?x) -> g(f(?x,?x)),
     f(?x,b) -> g(f(?x,?x)) ]
Apply Direct Methods...
Inner CPs:
   [ f(b,a) = g(f(a,a)),
     f(a,b) = g(f(a,a)) ]
Outer CPs:
   [ g(f(b,b)) = g(f(b,b)) ]
not Overlay, check Termination...
unknown/not Terminating
unknown Knuth&Bendix
Left-Linear, not Right-Linear
Development Closed
Direct Methods: CR

Final result: CR
/local-scratch/hzankl/2012/cops2012/35.trs: Success(CR)
(0 msec.)