Esempio n. 1
0
    def sequence_interpolant(self, formulas):
        cfg, env = None, None
        try:
            self._check_logic(formulas)

            if len(formulas) < 2:
                raise Exception("interpolation needs at least 2 formulae")

            cfg = mathsat.msat_create_config()
            mathsat.msat_set_option(cfg, "interpolation", "true")
            if self.logic == QF_BV:
                mathsat.msat_set_option(cfg, "theory.bv.eager", "false")
                mathsat.msat_set_option(cfg, "theory.eq_propagaion", "false")
            env = mathsat.msat_create_env(cfg, self.msat_env())

            groups = []
            for f in formulas:
                f = self.converter.convert(f)
                g = mathsat.msat_create_itp_group(env)
                mathsat.msat_set_itp_group(env, g)
                groups.append(g)
                mathsat.msat_assert_formula(env, f)

            res = mathsat.msat_solve(env)
            if res == mathsat.MSAT_UNKNOWN:
                raise Exception("error in mathsat interpolation: %s" %
                                mathsat.msat_last_error_message(env))

            if res == mathsat.MSAT_SAT:
                return None

            pysmt_ret = []
            for i in xrange(1, len(groups)):
                itp = mathsat.msat_get_interpolant(env, groups[:i])
                f = self.converter.back(itp)
                pysmt_ret.append(f)

            return pysmt_ret
        finally:
            if cfg:
                mathsat.msat_destroy_config(cfg)
            if env:
                mathsat.msat_destroy_env(env)
Esempio n. 2
0
File: msat.py Progetto: idkwim/pysmt
    def sequence_interpolant(self, formulas):
        cfg, env = None, None
        try:
            self._check_logic(formulas)

            if len(formulas) < 2:
                raise Exception("interpolation needs at least 2 formulae")

            cfg = mathsat.msat_create_config()
            mathsat.msat_set_option(cfg, "interpolation", "true")
            if self.logic == QF_BV:
                mathsat.msat_set_option(cfg, "theory.bv.eager", "false")
                mathsat.msat_set_option(cfg, "theory.eq_propagaion", "false")
            env = mathsat.msat_create_env(cfg, self.msat_env)

            groups = []
            for f in formulas:
                f = self.converter.convert(f)
                g = mathsat.msat_create_itp_group(env)
                mathsat.msat_set_itp_group(env, g)
                groups.append(g)
                mathsat.msat_assert_formula(env, f)

            res = mathsat.msat_solve(env)
            if res == mathsat.MSAT_UNKNOWN:
                raise Exception("error in mathsat interpolation: %s" %
                                mathsat.msat_last_error_message(env))

            if res == mathsat.MSAT_SAT:
                return None

            pysmt_ret = []
            for i in xrange(1, len(groups)):
                itp = mathsat.msat_get_interpolant(env, groups[:i])
                f = self.converter.back(itp)
                pysmt_ret.append(f)

            return pysmt_ret
        finally:
            if cfg:
                mathsat.msat_destroy_config(cfg)
            if env:
                mathsat.msat_destroy_env(env)
Esempio n. 3
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    def add_assertion(self, formula, named=None):
        self._assert_is_boolean(formula)
        term = self.converter.convert(formula)

        res = mathsat.msat_assert_formula(self.msat_env, term)

        if res != 0:
            msat_msg = mathsat.msat_last_error_message(self.msat_env)
            raise InternalSolverError(msat_msg)
        return
Esempio n. 4
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    def _add_assertion(self, formula, named=None):
        self._assert_is_boolean(formula)

        result = formula
        if self.options.unsat_cores_mode == "named":
            # If we want named unsat cores, we need to rewrite the
            # formulae as implications
            key = self.mgr.FreshSymbol(template="_assertion_%d")
            result = (key, named, formula)
            formula = self.mgr.Implies(key, formula)

        term = self.converter.convert(formula)
        res = mathsat.msat_assert_formula(self.msat_env(), term)

        if res != 0:
            msat_msg = mathsat.msat_last_error_message(self.msat_env())
            raise InternalSolverError(msat_msg)

        return result
Esempio n. 5
0
File: msat.py Progetto: idkwim/pysmt
    def _add_assertion(self, formula, named=None):
        self._assert_is_boolean(formula)

        result = formula
        if self.options.unsat_cores_mode == "named":
            # If we want named unsat cores, we need to rewrite the
            # formulae as implications
            key = self.mgr.FreshSymbol(template="_assertion_%d")
            result = (key, named, formula)
            formula = self.mgr.Implies(key, formula)

        term = self.converter.convert(formula)
        res = mathsat.msat_assert_formula(self.msat_env, term)

        if res != 0:
            msat_msg = mathsat.msat_last_error_message(self.msat_env)
            raise InternalSolverError(msat_msg)

        return result