; @author Akihisa Yamada
; @cops 1278
(format TRS :problem infeasibility)
(fun f 1)
(fun g 1)
(fun h 1)
(rule (f (g (h x))) (g (f (h (g x)))))
(rule (f x) x)
(rule (g x) x)
(rule (h x) x)
(infeasible? (= (f (g (h x))) (g (f (g (h x))))))