(ignored inputs)COMMENT Example 1 of \cite{GL06}
Rewrite Rules:
   [ g(a) -> f(g(a)),
     g(b) -> c,
     a -> b,
     f(?x) -> h(?x,?x),
     h(?x,?y) -> c ]
Apply Direct Methods...
Inner CPs:
   [ g(b) = f(g(a)) ]
Outer CPs:
   [  ]
not Overlay, check Termination...
unknown/not Terminating
unknown Knuth&Bendix
Left-Linear, not Right-Linear
unknown Development Closed
inner CP cond (upside-parallel)
innter CP Cond (outside)
unknown Upside-Parallel-Closed/Outside-Closed
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Simultaneous CPs:
   [ f(g(a)) = g(b),
     g(b) = f(g(a)) ]
unknown Okui (Simultaneous CPs)
unknown Strongly Depth-Preserving & Non-E-Overlapping
check Locally Decreasing Diagrams by Rule Labelling...
Critical Pair <g(b), f(g(a))> by Rules <2, 0> preceded by [(g,1)]
 joinable by a reduction of rules <[([],1)], [([],3),([],4)]>
Satisfiable by 3,5>1>2,4; f(1)g(0)h(0,0); 1>4>3,5>2
Diagram Decreasing
Direct Methods: CR

Final result: CR
/local-scratch/hzankl/2012/cops2012/19.trs: Success(CR)
(1 msec.)