; @author Akihisa Yamada
; @cops 1275
(format TRS :problem infeasibility)
(fun f 1)
(fun g 1)
(fun h 1)
(rule (f (g x)) (g (f (f x))))
(rule (f (h x)) (h (h (f x))))
(rule (f x) x)
(rule (g x) x)
(infeasible? (= (f x) (f (h x))))