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

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