YES
af/ONE-SORTED/652.trs
Input rules:
   [ c -> c,
     h(a,h(f(b),c)) -> c ]
Sorts having no ground terms: 
Rules applicable to ground terms:
   [ c -> c,
     h(a,h(f(b),c)) -> c ]
Constructor pattern: [h(?x_1,?x_2),a,f(?x_1),b]
Defined pattern: [c]
Constructor subsystem:
   [ ]
Modified Constructor subsystem:
   [ ]
No orientable rules for c. Add rules, and retry...
failed to construct defining rules
Retry with a different D/C-partition.
Constructor pattern: [h(?x_1,?x_2),a,f(?x_1),b,c]
Defined pattern: []
Constructor subsystem:
   [ c -> c,
     h(a,h(f(b),c)) -> c ]
c -> c
{}
   [  ]
Modified Constructor subsystem:
   [ h(a,h(f(b),c)) -> c ]
Find a quasi-ordering ...
order successfully found
Precedence:
 a : Mul;
 h : Mul;
 f : Mul;
 c : Mul,  b : Mul;
Rules:
   [ h(a,h(f(b),c)) -> c ]
Check confluence of constructor subsystem...
Check Termination...
Terminating, WCR: CR
Conjectures:
   [ ]
STEP 0
ES:
   [ ]
HS:
   [ ]
ES0:
   [ ]
HS0:
   [ ]
ES1:
   [ ]
HS1:
   [ ]
: Success(GCR)
(3 msec.)
0.02