MAYBE
(ignored inputs)COMMENT Cops #647 - #721: generated ground TRSs; evenly distributed in the UNR/UNC/NFP/CR hierarchy submitted by: Bertram Felgenhauer
Rewrite Rules:
   [ f(f(f(f(a)))) -> a,
     c -> h(f(f(c)),f(f(h(f(f(a)),h(h(b,h(c,c)),f(c)))))),
     f(a) -> c,
     b -> f(a),
     f(a) -> f(c) ]
Apply Direct Methods...
Inner CPs:
   [ f(f(f(c))) = a,
     f(f(f(f(c)))) = a ]
Outer CPs:
   [ c = f(c) ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

Combined result: Can't judge
658.trs: Failure(unknown CR)
(0 msec.)