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

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