YES
af/ONE-SORTED/700.trs
Input rules:
   [ a -> a,
     f(h(a,a)) -> f(b),
     c -> b ]
Sorts having no ground terms: 
Rules applicable to ground terms:
   [ a -> a,
     f(h(a,a)) -> f(b),
     c -> b ]
Constructor pattern: [f(?x_1),h(?x_1,?x_2),b]
Defined pattern: [c,a]
Constructor subsystem:
   [ ]
Modified Constructor subsystem:
   [ ]
candidate for c:
   [ c -> b ]
No orientable rules for a. Add rules, and retry...
failed to construct defining rules
Retry with a different D/C-partition.
Constructor pattern: [f(?x_1),h(?x_1,?x_2),b,a]
Defined pattern: [c]
Constructor subsystem:
   [ a -> a,
     f(h(a,a)) -> f(b) ]
a -> a
{}
   [  ]
Modified Constructor subsystem:
   [ f(h(a,a)) -> f(b) ]
candidate for c:
   [ c -> b ]
Find a quasi-ordering ...
order successfully found
Precedence:
 h : Mul;
 c : Mul;
 a : Mul;
 f : Mul;
 b : Mul;
Rules:
   [ c -> b,
     f(h(a,a)) -> f(b) ]
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