; @author Raul Gutierrez
; @author Salvador Lucas
; @doi 10.1007/3-540-45744-5_49
; @cops 924
; [153] Example 30
(format TRS :problem infeasibility)
(fun G 1)
(fun a 0)
(fun b 0)
(fun f 1)
(fun g 1)
(fun h 2)
(rule (f a) (g (h a b)))
(rule (g (g a)) (f b))
(rule (h x x) (g a))
(infeasible? (= (G (h a b)) (G (g a))))