The following SMT-LIB code runs without problems in Z3, MathSat and CVC4 but it is not running in Alt-Ergo, please let me know what happens, many thanks:
(set-logic QF_UF)
(set-option :incremental true)
(set-option :produce-models true)
(declare-fun m () Bool)
(declare-fun p () Bool)
(declare-fun b () Bool)
(declare-fun c () Bool)
(declare-fun r () Bool)
(declare-fun al () Bool)
(declare-fun all () Bool)
(declare-fun la () Bool)
(declare-fun lal () Bool)
(declare-fun g () Bool)
(declare-fun a () Bool)
(define-fun conjecture () Bool
(and (= (and (not r) c) m) (= p m) (= b m) (= c (not g))
(= (and (not al) (not all)) r) (= (and la b) al)
(= (or al la lal) all) (= (and (not g) p a) la)
(= (and (not g) (or la a)) lal)))
(push 1)
(assert (and conjecture (= a false) (= g false)))
(check-sat)
(get-model)
(pop 1)
(push 1)
(assert (and conjecture (= a false) (= g true)))
(check-sat)
(get-model)
(pop 1)
(push 1)
(assert (and conjecture (= a true) (= g true)))
(check-sat)
(get-model)
(pop 1)
(push 1)
(assert (and conjecture (= a true) (= g false)))
(check-sat)
(get-model)
For now, Alt-Ergo does not provide a full support for the SMT-2 format. In particular, the command get-model is not recognized.
Moreover, the commands push and pop are ignored. This is why Alt-Ergo says sat, unsat, ..., unsat on the given code (when get-model is removed).