NO
(ignored inputs)COMMENT reduction failed
Rewrite Rules:
   [ f(g(?x)) -> g(f(f(?x))),
     f(h(?x)) -> h(h(f(?x))),
     f(?x) -> ?x,
     g(?x) -> ?x ]
Apply Direct Methods...
Inner CPs:
   [ f(?x_3) = g(f(f(?x_3))) ]
Outer CPs:
   [ g(f(f(?x))) = g(?x),
     h(h(f(?x_1))) = h(?x_1) ]
not Overlay, check Termination...
Terminating, not WCR
Knuth & Bendix
Direct Methods: not CR

Combined result: not CR
/tmp/fileKBmWZt.trs: Success(not CR)
(7 msec.)