mirror of
https://github.com/Z3Prover/z3
synced 2025-04-28 19:35:50 +00:00
add range / loop handling for re. Fix regression reading mixed numerals reported by Trentin
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner
parent
9a6fe93e6c
commit
9909c056f0
8 changed files with 200 additions and 58 deletions
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@ -24,18 +24,35 @@ Notes:
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#include"uint_set.h"
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#include"automaton.h"
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#include"well_sorted.h"
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#include"var_subst.h"
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expr_ref sym_expr::accept(expr* e) {
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ast_manager& m = m_t.get_manager();
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expr_ref result(m);
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if (m_is_pred) {
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var_subst subst(m);
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subst(m_t, 1, &e, result);
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}
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else {
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result = m.mk_eq(e, m_t);
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}
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return result;
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}
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std::ostream& sym_expr::display(std::ostream& out) const {
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return out << m_t;
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}
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struct display_expr1 {
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ast_manager& m;
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display_expr1(ast_manager& m): m(m) {}
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std::ostream& display(std::ostream& out, expr* e) const {
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return out << mk_pp(e, m);
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std::ostream& display(std::ostream& out, sym_expr* e) const {
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return e->display(out);
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}
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};
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re2automaton::re2automaton(ast_manager& m): m(m), u(m) {}
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re2automaton::re2automaton(ast_manager& m): m(m), u(m), bv(m) {}
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eautomaton* re2automaton::operator()(expr* e) {
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eautomaton* r = re2aut(e);
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@ -53,6 +70,7 @@ eautomaton* re2automaton::re2aut(expr* e) {
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expr* e1, *e2;
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scoped_ptr<eautomaton> a, b;
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unsigned lo, hi;
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zstring s1, s2;
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if (u.re.is_to_re(e, e1)) {
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return seq2aut(e1);
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}
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@ -76,12 +94,27 @@ eautomaton* re2automaton::re2aut(expr* e) {
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a = eautomaton::mk_opt(*a);
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return a.detach();
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}
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else if (u.re.is_range(e)) {
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// TBD
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else if (u.re.is_range(e, e1, e2)) {
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if (u.str.is_string(e1, s1) && u.str.is_string(e2, s2) &&
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s1.length() == 1 && s2.length() == 1) {
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unsigned start = s1[0];
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unsigned stop = s2[0];
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unsigned nb = s1.num_bits();
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sort_ref s(bv.mk_sort(nb), m);
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expr_ref v(m.mk_var(0, s), m);
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expr_ref _start(bv.mk_numeral(start, nb), m);
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expr_ref _stop(bv.mk_numeral(stop, nb), m);
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expr_ref cond(m.mk_and(bv.mk_ule(_start, v), bv.mk_ule(v, _stop)), m);
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a = alloc(eautomaton, sm, sym_expr::mk_pred(cond));
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return a.detach();
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}
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else {
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TRACE("seq", tout << "Range expression is not handled: " << mk_pp(e, m) << "\n";);
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}
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}
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else if (u.re.is_loop(e, e1, lo, hi) && (a = re2aut(e1))) {
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scoped_ptr<eautomaton> eps = eautomaton::mk_epsilon(m);
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b = eautomaton::mk_epsilon(m);
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scoped_ptr<eautomaton> eps = eautomaton::mk_epsilon(sm);
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b = eautomaton::mk_epsilon(sm);
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while (hi > lo) {
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scoped_ptr<eautomaton> c = eautomaton::mk_concat(*a, *b);
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b = eautomaton::mk_union(*eps, *c);
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@ -94,10 +127,12 @@ eautomaton* re2automaton::re2aut(expr* e) {
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return b.detach();
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}
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#if 0
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else if (u.re.is_intersect(e, e1, e2)) {
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}
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else if (u.re.is_empty(e)) {
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return alloc(eautomaton, m);
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}
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else if (u.re.is_full(e)) {
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}
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else if (u.re.is_intersect(e, e1, e2)) {
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}
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#endif
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@ -114,10 +149,10 @@ eautomaton* re2automaton::seq2aut(expr* e) {
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return eautomaton::mk_concat(*a, *b);
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}
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else if (u.str.is_unit(e, e1)) {
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return alloc(eautomaton, m, e1);
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return alloc(eautomaton, sm, sym_expr::mk_char(m, e1));
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}
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else if (u.str.is_empty(e)) {
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return eautomaton::mk_epsilon(m);
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return eautomaton::mk_epsilon(sm);
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}
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else if (u.str.is_string(e, s)) {
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unsigned init = 0;
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@ -126,9 +161,9 @@ eautomaton* re2automaton::seq2aut(expr* e) {
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final.push_back(s.length());
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for (unsigned k = 0; k < s.length(); ++k) {
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// reference count?
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mvs.push_back(eautomaton::move(m, k, k+1, u.str.mk_char(s, k)));
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mvs.push_back(eautomaton::move(sm, k, k+1, sym_expr::mk_char(m, u.str.mk_char(s, k))));
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}
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return alloc(eautomaton, m, init, final, mvs);
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return alloc(eautomaton, sm, init, final, mvs);
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}
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return 0;
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}
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@ -679,11 +714,11 @@ bool seq_rewriter::is_sequence(eautomaton& aut, expr_ref_vector& seq) {
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return false;
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}
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visited.insert(state);
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expr* t = mvs[0].t();
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if (!t) {
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sym_expr* t = mvs[0].t();
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if (!t || !t->is_char()) {
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return false;
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}
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seq.push_back(m_util.str.mk_unit(t));
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seq.push_back(m_util.str.mk_unit(t->get_char()));
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state = mvs[0].dst();
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mvs.reset();
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aut.get_moves_from(state, mvs, true);
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@ -727,7 +762,7 @@ bool seq_rewriter::is_sequence(expr* e, expr_ref_vector& seq) {
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br_status seq_rewriter::mk_str_in_regexp(expr* a, expr* b, expr_ref& result) {
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scoped_ptr<eautomaton> aut;
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expr_ref_vector seq(m());
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if (!(aut = re2automaton(m())(b))) {
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if (!(aut = m_re2aut(b))) {
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return BR_FAILED;
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}
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@ -769,8 +804,8 @@ br_status seq_rewriter::mk_str_in_regexp(expr* a, expr* b, expr_ref& result) {
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aut->get_moves_from(state, mvs, false);
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for (unsigned j = 0; j < mvs.size(); ++j) {
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eautomaton::move const& mv = mvs[j];
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if (m().is_value(mv.t()) && m().is_value(ch)) {
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if (mv.t() == ch) {
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if (mv.t()->is_char() && m().is_value(mv.t()->get_char()) && m().is_value(ch)) {
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if (mv.t()->get_char() == ch) {
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add_next(next, mv.dst(), acc);
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}
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else {
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@ -778,7 +813,7 @@ br_status seq_rewriter::mk_str_in_regexp(expr* a, expr* b, expr_ref& result) {
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}
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}
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else {
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cond = m().mk_eq(mv.t(), ch);
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cond = mv.t()->accept(ch);
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if (!m().is_true(acc)) cond = m().mk_and(acc, cond);
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add_next(next, mv.dst(), cond);
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}
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@ -26,11 +26,37 @@ Notes:
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#include"lbool.h"
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#include"automaton.h"
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class sym_expr {
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bool m_is_pred;
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expr_ref m_t;
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unsigned m_ref;
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sym_expr(bool is_pred, expr_ref& t) : m_is_pred(is_pred), m_t(t), m_ref(0) {}
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public:
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expr_ref accept(expr* e);
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static sym_expr* mk_char(expr_ref& t) { return alloc(sym_expr, false, t); }
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static sym_expr* mk_char(ast_manager& m, expr* t) { expr_ref tr(t, m); return alloc(sym_expr, false, tr); }
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static sym_expr* mk_pred(expr_ref& t) { return alloc(sym_expr, true, t); }
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void inc_ref() { ++m_ref; }
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void dec_ref() { --m_ref; if (m_ref == 0) dealloc(this); }
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std::ostream& display(std::ostream& out) const;
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bool is_char() const { return !m_is_pred; }
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bool is_pred() const { return m_is_pred; }
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expr* get_char() const { SASSERT(is_char()); return m_t; }
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typedef automaton<expr, ast_manager> eautomaton;
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};
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class sym_expr_manager {
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public:
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void inc_ref(sym_expr* s) { if (s) s->inc_ref(); }
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void dec_ref(sym_expr* s) { if (s) s->dec_ref(); }
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};
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typedef automaton<sym_expr, sym_expr_manager> eautomaton;
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class re2automaton {
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ast_manager& m;
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seq_util u;
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sym_expr_manager sm;
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seq_util u;
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bv_util bv;
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eautomaton* re2aut(expr* e);
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eautomaton* seq2aut(expr* e);
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public:
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@ -44,6 +70,7 @@ class re2automaton {
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class seq_rewriter {
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seq_util m_util;
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arith_util m_autil;
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re2automaton m_re2aut;
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expr_ref_vector m_es, m_lhs, m_rhs;
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br_status mk_seq_concat(expr* a, expr* b, expr_ref& result);
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@ -80,7 +107,7 @@ class seq_rewriter {
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public:
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seq_rewriter(ast_manager & m, params_ref const & p = params_ref()):
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m_util(m), m_autil(m), m_es(m), m_lhs(m), m_rhs(m) {
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m_util(m), m_autil(m), m_re2aut(m), m_es(m), m_lhs(m), m_rhs(m) {
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}
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ast_manager & m() const { return m_util.get_manager(); }
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family_id get_fid() const { return m_util.get_family_id(); }
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@ -22,12 +22,46 @@ Revision History:
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#include "ast_pp.h"
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#include <sstream>
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static bool is_hex_digit(char ch, unsigned& d) {
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if ('0' <= ch && ch <= '9') {
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d = ch - '0';
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return true;
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}
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if ('A' <= ch && ch <= 'F') {
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d = 10 + ch - 'A';
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return true;
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}
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return false;
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}
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static bool is_escape_char(char const *& s, unsigned& result) {
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unsigned d1, d2;
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if (*s == '\\' && *(s + 1) == 'x' &&
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is_hex_digit(*(s + 2), d1) && is_hex_digit(*(s + 3), d2)) {
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result = d1*16 + d2;
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s += 4;
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return true;
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}
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if (*s == '\\' && *(s + 1) == '\\') {
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result = '\\';
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s += 2;
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return true;
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}
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return false;
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}
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zstring::zstring(encoding enc): m_encoding(enc) {}
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zstring::zstring(char const* s, encoding enc): m_encoding(enc) {
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while (*s) {
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m_buffer.push_back(*s);
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++s;
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unsigned ch;
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if (is_escape_char(s, ch)) {
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m_buffer.push_back(ch);
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}
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else {
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m_buffer.push_back(*s);
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++s;
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}
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}
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}
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@ -80,9 +114,10 @@ zstring zstring::replace(zstring const& src, zstring const& dst) const {
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return result;
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}
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static const char esc_table[32][3] =
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{ "\\0", "^A", "^B", "^C", "^D", "^E", "^F", "\\a", "\\b", "\\t", "\\n", "\\v", "\\f", "\\r", "^N",
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"^O", "^P", "^Q", "^R", "^S", "^T", "^U", "^V","^W","^X","^Y","^Z","\\e","^\\","^]","^^","^_"};
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static const char esc_table[32][6] =
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{ "\\x00", "\\x01", "\\x02", "\\x03", "\\x04", "\\x05", "\\x06", "\\x07", "\\x08", "\\x09", "\\n", "\\v", "\\f", "\\r", "\\x0E", "\\x0F",
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"\\x10", "\\x11", "\\x12", "\\x13", "\\x14", "\\x15", "\\x16", "\\x17", "\\x18", "\\x19", "\\x1A", "\\x1B", "\\x1C", "\\x1D", "\\x1E", "\\x1F"
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};
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std::string zstring::encode() const {
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SASSERT(m_encoding == ascii);
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@ -91,7 +126,7 @@ std::string zstring::encode() const {
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unsigned char ch = m_buffer[i];
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if (0 <= ch && ch < 32) {
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strm << esc_table[ch];
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}
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}
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else if (ch == 127) {
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strm << "^?";
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}
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@ -98,6 +98,7 @@ public:
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zstring& operator=(zstring const& other);
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zstring replace(zstring const& src, zstring const& dst) const;
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unsigned num_bits() const { return (m_encoding==ascii)?8:16; }
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encoding get_encoding() const { return m_encoding; }
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std::string encode() const;
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unsigned length() const { return m_buffer.size(); }
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unsigned operator[](unsigned i) const { return m_buffer[i]; }
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@ -298,17 +299,19 @@ public:
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bool is_to_re(expr const* n) const { return is_app_of(n, m_fid, OP_SEQ_TO_RE); }
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bool is_concat(expr const* n) const { return is_app_of(n, m_fid, OP_RE_CONCAT); }
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bool is_union(expr const* n) const { return is_app_of(n, m_fid, OP_RE_UNION); }
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bool is_inter(expr const* n) const { return is_app_of(n, m_fid, OP_RE_INTERSECT); }
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bool is_intersection(expr const* n) const { return is_app_of(n, m_fid, OP_RE_INTERSECT); }
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bool is_star(expr const* n) const { return is_app_of(n, m_fid, OP_RE_STAR); }
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bool is_plus(expr const* n) const { return is_app_of(n, m_fid, OP_RE_PLUS); }
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bool is_opt(expr const* n) const { return is_app_of(n, m_fid, OP_RE_OPTION); }
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bool is_range(expr const* n) const { return is_app_of(n, m_fid, OP_RE_RANGE); }
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bool is_loop(expr const* n) const { return is_app_of(n, m_fid, OP_RE_LOOP); }
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bool is_empty(expr const* n) const { return is_app_of(n, m_fid, OP_RE_EMPTY_SET); }
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bool is_full(expr const* n) const { return is_app_of(n, m_fid, OP_RE_FULL_SET); }
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MATCH_UNARY(is_to_re);
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MATCH_BINARY(is_concat);
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MATCH_BINARY(is_union);
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MATCH_BINARY(is_inter);
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MATCH_BINARY(is_intersection);
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MATCH_BINARY(is_range);
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MATCH_UNARY(is_star);
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MATCH_UNARY(is_plus);
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MATCH_UNARY(is_opt);
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@ -151,7 +151,7 @@ public:
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m_final_states(other.m_final_states)
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{}
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// create the automaton that accepts the empty string only.
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// create the automaton that accepts the empty string/sequence only.
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static automaton* mk_epsilon(M& m) {
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moves mvs;
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unsigned_vector final;
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@ -168,10 +168,24 @@ public:
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return alloc(automaton, m, 0, final, mvs);
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}
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static automaton* clone(automaton const& a) {
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moves mvs;
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unsigned_vector final;
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append_moves(0, a, mvs);
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append_final(0, a, final);
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return alloc(automaton, a.m, a.init(), final, mvs);
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}
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// create the sum of disjoint automata
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static automaton* mk_union(automaton const& a, automaton const& b) {
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SASSERT(&a.m == &b.m);
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M& m = a.m;
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if (a.is_empty()) {
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return clone(b);
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}
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if (b.is_empty()) {
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return clone(a);
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}
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moves mvs;
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unsigned_vector final;
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unsigned offset1 = 1;
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@ -196,6 +210,10 @@ public:
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init = 0;
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mvs.push_back(move(m, 0, a.init() + offset));
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}
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if (a.is_empty()) {
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return clone(a);
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}
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mvs.push_back(move(m, init, a.final_state() + offset));
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append_moves(offset, a, mvs);
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append_final(offset, a, final);
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@ -206,6 +224,19 @@ public:
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static automaton* mk_concat(automaton const& a, automaton const& b) {
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SASSERT(&a.m == &b.m);
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M& m = a.m;
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if (a.is_empty()) {
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return clone(a);
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}
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if (b.is_empty()) {
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return clone(b);
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}
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if (a.is_epsilon()) {
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return clone(b);
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}
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if (b.is_epsilon()) {
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return clone(a);
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}
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moves mvs;
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unsigned_vector final;
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unsigned init = 0;
|
||||
|
|
@ -295,6 +326,10 @@ public:
|
|||
// src - e -> dst - ET -> Dst1 => src - ET -> Dst1 if in_degree(dst) = 1, src != dst
|
||||
// Src - E -> dst - et -> dst1 => Src - et -> dst1 if out_degree(dst) = 1, src != dst
|
||||
//
|
||||
// Some missing:
|
||||
// src - et -> dst - E -> Dst1 => src - et -> Dst1 if in_degree(dst) = 1
|
||||
// Src - ET -> dst - e -> dst1 => Src - ET -> dst1 if out_degree(dst) = 1,
|
||||
//
|
||||
void compress() {
|
||||
for (unsigned i = 0; i < m_delta.size(); ++i) {
|
||||
for (unsigned j = 0; j < m_delta[i].size(); ++j) {
|
||||
|
|
@ -446,6 +481,7 @@ public:
|
|||
}
|
||||
|
||||
bool is_empty() const { return m_final_states.empty(); }
|
||||
bool is_epsilon() const { return m_final_states.size() == 1 && m_final_states.back() == init() && m_delta.empty(); }
|
||||
unsigned final_state() const { return m_final_states[0]; }
|
||||
bool has_single_final_sink() const { return m_final_states.size() == 1 && m_delta[final_state()].empty(); }
|
||||
unsigned num_states() const { return m_delta.size(); }
|
||||
|
|
|
|||
|
|
@ -399,7 +399,7 @@ namespace smt2 {
|
|||
void check_keyword(char const * msg) { if (!curr_is_keyword()) throw parser_exception(msg); }
|
||||
void check_string(char const * msg) { if (!curr_is_string()) throw parser_exception(msg); }
|
||||
void check_int(char const * msg) { if (!curr_is_int()) throw parser_exception(msg); }
|
||||
void check_int_or_float(char const * msg) { if (!curr_is_int() || !curr_is_float()) throw parser_exception(msg); }
|
||||
void check_int_or_float(char const * msg) { if (!curr_is_int() && !curr_is_float()) throw parser_exception(msg); }
|
||||
void check_float(char const * msg) { if (!curr_is_float()) throw parser_exception(msg); }
|
||||
|
||||
void error(unsigned line, unsigned pos, char const * msg) {
|
||||
|
|
@ -2341,7 +2341,7 @@ namespace smt2 {
|
|||
break;
|
||||
}
|
||||
case CPK_NUMERAL:
|
||||
check_int("invalid command argument, numeral expected");
|
||||
check_int_or_float("invalid command argument, numeral expected");
|
||||
m_curr_cmd->set_next_arg(m_ctx, curr_numeral());
|
||||
next();
|
||||
break;
|
||||
|
|
|
|||
|
|
@ -31,8 +31,8 @@ using namespace smt;
|
|||
struct display_expr {
|
||||
ast_manager& m;
|
||||
display_expr(ast_manager& m): m(m) {}
|
||||
std::ostream& display(std::ostream& out, expr* e) const {
|
||||
return out << mk_pp(e, m);
|
||||
std::ostream& display(std::ostream& out, sym_expr* e) const {
|
||||
return e->display(out);
|
||||
}
|
||||
};
|
||||
|
||||
|
|
@ -169,7 +169,8 @@ theory_seq::theory_seq(ast_manager& m):
|
|||
m_lhs(m), m_rhs(m),
|
||||
m_atoms_qhead(0),
|
||||
m_new_solution(false),
|
||||
m_new_propagation(false) {
|
||||
m_new_propagation(false),
|
||||
m_mk_aut(m) {
|
||||
m_prefix = "seq.prefix.suffix";
|
||||
m_suffix = "seq.suffix.prefix";
|
||||
m_contains_left = "seq.contains.left";
|
||||
|
|
@ -1176,7 +1177,9 @@ void theory_seq::display(std::ostream & out) const {
|
|||
for (; it != end; ++it) {
|
||||
out << mk_pp(it->m_key, m) << "\n";
|
||||
display_expr disp(m);
|
||||
it->m_value->display(out, disp);
|
||||
if (it->m_value) {
|
||||
it->m_value->display(out, disp);
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!m_rep.empty()) {
|
||||
|
|
@ -1952,11 +1955,10 @@ void theory_seq::add_at_axiom(expr* e) {
|
|||
void theory_seq::propagate_step(literal lit, expr* step) {
|
||||
context& ctx = get_context();
|
||||
SASSERT(ctx.get_assignment(lit) == l_true);
|
||||
expr* re, *t, *s, *idx, *i, *j;
|
||||
VERIFY(is_step(step, s, idx, re, i, j, t));
|
||||
expr_ref nth = mk_nth(s, idx);
|
||||
TRACE("seq", tout << mk_pp(step, m) << " -> " << mk_pp(t, m) << " = " << nth << "\n";);
|
||||
propagate_eq(lit, t, nth);
|
||||
expr* re, *acc, *s, *idx, *i, *j;
|
||||
VERIFY(is_step(step, s, idx, re, i, j, acc));
|
||||
TRACE("seq", tout << mk_pp(step, m) << " -> " << mk_pp(acc, m) << "\n";);
|
||||
propagate_lit(0, 1, &lit, mk_literal(acc));
|
||||
rational lo;
|
||||
rational _idx;
|
||||
if (lower_bound(s, lo) && lo.is_unsigned() && m_autil.is_numeral(idx, _idx) && lo >= _idx) {
|
||||
|
|
@ -2250,15 +2252,14 @@ eautomaton* theory_seq::get_automaton(expr* re) {
|
|||
if (m_re2aut.find(re, result)) {
|
||||
return result;
|
||||
}
|
||||
result = re2automaton(m)(re);
|
||||
result = m_mk_aut(re);
|
||||
if (result) {
|
||||
display_expr disp(m);
|
||||
TRACE("seq", result->display(tout, disp););
|
||||
}
|
||||
if (result) {
|
||||
m_automata.push_back(result);
|
||||
m_trail_stack.push(push_back_vector<theory_seq, scoped_ptr_vector<eautomaton> >(m_automata));
|
||||
}
|
||||
m_automata.push_back(result);
|
||||
m_trail_stack.push(push_back_vector<theory_seq, scoped_ptr_vector<eautomaton> >(m_automata));
|
||||
|
||||
m_re2aut.insert(re, result);
|
||||
m_trail_stack.push(insert_obj_map<theory_seq, expr, eautomaton*>(m_re2aut, re));
|
||||
return result;
|
||||
|
|
@ -2281,10 +2282,11 @@ bool theory_seq::is_acc_rej(symbol const& ar, expr* e, expr*& s, expr*& idx, exp
|
|||
s = to_app(e)->get_arg(0);
|
||||
idx = to_app(e)->get_arg(1);
|
||||
re = to_app(e)->get_arg(2);
|
||||
TRACE("seq", tout << mk_pp(re, m) << "\n";);
|
||||
VERIFY(m_autil.is_numeral(to_app(e)->get_arg(3), r));
|
||||
SASSERT(r.is_unsigned());
|
||||
i = r.get_unsigned();
|
||||
aut = m_re2aut[re];
|
||||
aut = get_automaton(re);
|
||||
return true;
|
||||
}
|
||||
else {
|
||||
|
|
@ -2311,12 +2313,13 @@ bool theory_seq::is_step(expr* e, expr*& s, expr*& idx, expr*& re, expr*& i, exp
|
|||
}
|
||||
}
|
||||
|
||||
expr_ref theory_seq::mk_step(expr* s, expr* idx, expr* re, unsigned i, unsigned j, expr* t) {
|
||||
expr_ref theory_seq::mk_step(expr* s, expr* idx, expr* re, unsigned i, unsigned j, expr* acc) {
|
||||
SASSERT(m.is_bool(acc));
|
||||
expr_ref_vector args(m);
|
||||
args.push_back(s).push_back(idx).push_back(re);
|
||||
args.push_back(m_autil.mk_int(i));
|
||||
args.push_back(m_autil.mk_int(j));
|
||||
args.push_back(t);
|
||||
args.push_back(acc);
|
||||
return expr_ref(m_util.mk_skolem(m_aut_step, args.size(), args.c_ptr(), m.mk_bool_sort()), m);
|
||||
}
|
||||
|
||||
|
|
@ -2390,7 +2393,9 @@ bool theory_seq::add_accept2step(expr* acc) {
|
|||
for (unsigned i = 0; i < mvs.size(); ++i) {
|
||||
unsigned j = (i + start) % mvs.size();
|
||||
eautomaton::move mv = mvs[j];
|
||||
step = mk_step(e, idx, re, src, mv.dst(), mv.t());
|
||||
expr_ref nth = mk_nth(e, idx);
|
||||
expr_ref acc = mv.t()->accept(nth);
|
||||
step = mk_step(e, idx, re, src, mv.dst(), acc);
|
||||
lits.push_back(mk_literal(step));
|
||||
switch (ctx.get_assignment(lits.back())) {
|
||||
case l_true:
|
||||
|
|
@ -2433,8 +2438,8 @@ bool theory_seq::add_accept2step(expr* acc) {
|
|||
bool theory_seq::add_step2accept(expr* step) {
|
||||
context& ctx = get_context();
|
||||
SASSERT(ctx.get_assignment(step) == l_true);
|
||||
expr* re, *t, *s, *idx, *i, *j;
|
||||
VERIFY(is_step(step, s, idx, re, i, j, t));
|
||||
expr* re, *_acc, *s, *idx, *i, *j;
|
||||
VERIFY(is_step(step, s, idx, re, i, j, _acc));
|
||||
literal acc1 = mk_accept(s, idx, re, i);
|
||||
switch (ctx.get_assignment(acc1)) {
|
||||
case l_false:
|
||||
|
|
@ -2508,7 +2513,7 @@ bool theory_seq::add_reject2reject(expr* rej) {
|
|||
bool has_undef = false;
|
||||
for (unsigned i = 0; i < mvs.size(); ++i) {
|
||||
eautomaton::move const& mv = mvs[i];
|
||||
literal eq = mk_eq(nth, mv.t(), false);
|
||||
literal eq = mk_literal(mv.t()->accept(nth));
|
||||
switch (ctx.get_assignment(eq)) {
|
||||
case l_false:
|
||||
case l_true:
|
||||
|
|
|
|||
|
|
@ -278,6 +278,7 @@ namespace smt {
|
|||
unsigned m_atoms_qhead;
|
||||
bool m_new_solution; // new solution added
|
||||
bool m_new_propagation; // new propagation to core
|
||||
re2automaton m_mk_aut;
|
||||
|
||||
virtual final_check_status final_check_eh();
|
||||
virtual bool internalize_atom(app* atom, bool) { return internalize_term(atom); }
|
||||
|
|
@ -411,7 +412,7 @@ namespace smt {
|
|||
return is_acc_rej(m_reject, rej, s, idx, re, i, aut);
|
||||
}
|
||||
bool is_acc_rej(symbol const& ar, expr* e, expr*& s, expr*& idx, expr*& re, unsigned& i, eautomaton*& aut);
|
||||
expr_ref mk_step(expr* s, expr* tail, expr* re, unsigned i, unsigned j, expr* t);
|
||||
expr_ref mk_step(expr* s, expr* tail, expr* re, unsigned i, unsigned j, expr* acc);
|
||||
bool is_step(expr* e, expr*& s, expr*& tail, expr*& re, expr*& i, expr*& j, expr*& t) const;
|
||||
bool is_step(expr* e) const;
|
||||
void propagate_step(literal lit, expr* n);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue