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

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