NO
af/ONE-SORTED/21.trs
Input rules:
   [ b -> a,
     b -> c,
     c -> h(b),
     c -> d,
     a -> h(a),
     d -> h(d) ]
Sorts having no ground terms: 
Rules applicable to ground terms:
   [ b -> a,
     b -> c,
     c -> h(b),
     c -> d,
     a -> h(a),
     d -> h(d) ]
Constructor pattern: [h(?x_1)]
Defined pattern: [d,c,a,b]
Constructor subsystem:
   [ ]
Modified Constructor subsystem:
   [ ]
No orientable rules for d. Add rules, and retry...
failed to construct defining rules
Retry with a different D/C-partition.
Constructor pattern: [h(?x_1),d]
Defined pattern: [c,a,b]
Constructor subsystem:
   [ d -> h(d) ]
Modified Constructor subsystem:
   [ d -> h(d) ]
candidate for c:
   [ c -> h(b) ]
   [ c -> d ]
No orientable rules for a. Add rules, and retry...
failed to construct defining rules
Retry with a different D/C-partition.
Constructor pattern: [h(?x_1),d,a]
Defined pattern: [c,b]
Constructor subsystem:
   [ a -> h(a),
     d -> h(d) ]
Modified Constructor subsystem:
   [ a -> h(a),
     d -> h(d) ]
candidate for c:
   [ c -> h(b) ]
   [ c -> d ]
candidate for b:
   [ b -> a ]
   [ b -> c ]
Find a quasi-ordering ...
failed to find an ordering.
Try to supplement auxiliary rules.
{}{}{}{}{a}{d}Supplemented Rules:
   [ ]
failed to supplement auxiliary rules
check Non-Ground-Confluence...
ground constructor terms for instantiation: {}
ground terms for instantiation: {b:o}
obtain 12 rules by 3 steps unfolding
obtain 100 candidates for checking non-joinability
check by TCAP-Approximation (failure)
check by Ordering(rpo), check by Tree-Automata Approximation (success)
Witness for Non-Confluence: <a <- b -> d>
: Success(not GCR)
(22 msec.)
0.05