/home/nowonder/forschung/aprove/TPDB05/TRS/higher-order/ToyamaRTA04/Ex4Filter.trs

The program

(VAR xs ys p x)
(RULES
  app(app(app(if, true), xs), ys) -> xs
  app(app(app(if, false), xs), ys) -> ys
  app(app(filter, p), nil) -> nil
  app(app(filter, p), app(app(cons, x), xs)) -> app(app(app(if, app(p, x)), app(app(cons, x), app(app(filter, p), xs))), app(app(filter, p), xs))
)

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