; @author Jonas Schöpf
; Ctrl example from examples/student/sum09.ctrs
(format LCTRS :smtlib 2.6)
(theory Ints)
(sort Result)
(fun v (-> Int Int Result))
(fun return (-> Int Result))
(fun u (-> Int Int Result))
(fun sum1 (-> Int Result))

(rule (v n s) (return s) :guard (not (> n 0)) :var ((n Int) (s Int)))
(rule (v n s) (v (- n 1) (+ s n)) :guard (> n 0) :var ((n Int) (s Int)))
(rule (u n s) (v n 0) :guard (not (< n 0)) :var ((n Int) (s Int)))
(rule (u n s) (return 0) :guard (< n 0) :var ((n Int) (s Int)))
(rule (sum1 n) (u n rnd) :var ((n Int) (rnd Int)))