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

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