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

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