Problem:
 b() -> f(h(f(f(b())),c()))
 h(h(c(),c()),b()) -> c()
 h(f(a()),b()) -> b()

Proof:
 Uncurry Processor:
  b() -> f5(f(),f5(f5(h(),f5(f(),f5(f(),b()))),c()))
  f5(f5(h(),f5(f5(h(),c()),c())),b()) -> c()
  f5(f5(h(),f5(f(),a())),b()) -> b()
  Ground Confluence Processor:
   non-confluent by decision procedure.