/home/nowonder/forschung/aprove/TPDB05/TRS/AProVE/improved_usable.trs

The program

(VAR x)
(RULES 
  f(a,h(x)) -> f(g(x),h(x)) 
  h(g(x)) -> h(a)
  g(h(x)) -> g(x) 
  h(h(x)) -> x
)

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