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

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