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

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