/home/nowonder/forschung/aprove/TPDB05/TRS/higher-order/AotoYam/023.trs

The program

(VAR x y)
(RULES
  app(id, x) -> x
  app(plus, 0) -> id
  app(app(plus, app(s, x)), y) -> app(s, app(app(plus, x), y))
)