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

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