mirror of
https://github.com/Z3Prover/z3
synced 2025-11-04 05:19:11 +00:00
flip literals in ATEs produced using RI
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner
parent
528dc8a3f8
commit
a954ab7d8d
7 changed files with 224 additions and 85 deletions
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@ -410,6 +410,7 @@ namespace sat {
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if (c.is_learned()) {
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m_elim_learned_literals += c.size() - new_sz;
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}
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switch(new_sz) {
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case 0:
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s.set_conflict(justification());
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@ -194,7 +194,9 @@ namespace sat {
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if (u != get_parent(v) && safe_reach(u, v)) {
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++elim;
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add_del(~u, v);
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// IF_VERBOSE(1, verbose_stream() << "remove " << u << " -> " << v << "\n");
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if (s.get_config().m_drat) s.m_drat.del(~u, v);
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s.m_mc.stackv().reset(); // TBD: brittle code
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s.add_ate(~u, v);
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if (find_binary_watch(wlist, ~v)) {
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IF_VERBOSE(10, verbose_stream() << "binary: " << ~u << "\n");
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s.assign(~u, justification());
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@ -75,33 +75,41 @@ namespace sat {
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void model_converter::operator()(model & m) const {
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vector<entry>::const_iterator begin = m_entries.begin();
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vector<entry>::const_iterator it = m_entries.end();
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bool first = false; // true;
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bool first = true; // false; // true; // false; // true;
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//SASSERT(!m_solver || m_solver->check_clauses(m));
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while (it != begin) {
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--it;
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bool_var v0 = it->var();
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SASSERT(it->get_kind() != ELIM_VAR || m[v0] == l_undef);
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// if it->get_kind() == BLOCK_LIT, then it might be the case that m[v] != l_undef,
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SASSERT(it->get_kind() != ELIM_VAR || v0 == null_bool_var || m[v0] == l_undef);
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// if it->get_kind() == BCE, then it might be the case that m[v] != l_undef,
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// and the following procedure flips its value.
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bool sat = false;
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bool var_sign = false;
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unsigned index = 0;
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literal_vector clause;
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VERIFY(legal_to_flip(v0));
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VERIFY(v0 == null_bool_var || legal_to_flip(v0));
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for (literal l : it->m_clauses) {
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if (l == null_literal) {
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// end of clause
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elim_stack* st = it->m_elim_stack[index];
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if (!sat) {
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if (!sat && it->get_kind() == ATE) {
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IF_VERBOSE(0, display(verbose_stream() << "violated ate\n", *it) << "\n");
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IF_VERBOSE(0, for (unsigned v = 0; v < m.size(); ++v) verbose_stream() << v << " := " << m[v] << "\n";);
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IF_VERBOSE(0, display(verbose_stream()));
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exit(0);
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first = false;
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}
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if (!sat && it->get_kind() != ATE && v0 != null_bool_var) {
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VERIFY(legal_to_flip(v0));
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m[v0] = var_sign ? l_false : l_true;
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}
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elim_stack* st = it->m_elim_stack[index];
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if (st) {
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process_stack(m, clause, st->stack());
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}
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sat = false;
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if (first && m_solver && !m_solver->check_clauses(m)) {
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IF_VERBOSE(0, display(verbose_stream() << "after processing stack\n", *it) << "\n");
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IF_VERBOSE(0, display(verbose_stream()));
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first = false;
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}
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++index;
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@ -191,17 +199,43 @@ namespace sat {
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entry & e = m_entries.back();
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SASSERT(e.var() == v);
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SASSERT(e.get_kind() == k);
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VERIFY(legal_to_flip(v));
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VERIFY(v == null_bool_var || legal_to_flip(v));
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return e;
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}
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void model_converter::add_ate(clause const& c) {
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if (stackv().empty()) return;
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insert(mk(ATE, null_bool_var), c);
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}
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void model_converter::add_ate(literal_vector const& lits) {
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if (stackv().empty()) return;
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insert(mk(ATE, null_bool_var), lits);
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}
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void model_converter::add_ate(literal l1, literal l2) {
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if (stackv().empty()) return;
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insert(mk(ATE, null_bool_var), l1, l2);
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}
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void model_converter::add_elim_stack(entry & e) {
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e.m_elim_stack.push_back(stackv().empty() ? nullptr : alloc(elim_stack, stackv()));
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#if 0
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if (!stackv().empty() && e.get_kind() == ATE) {
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IF_VERBOSE(0, display(verbose_stream(), e) << "\n");
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}
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#endif
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for (auto const& s : stackv()) VERIFY(legal_to_flip(s.second.var()));
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stackv().reset();
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}
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void model_converter::insert(entry & e, clause const & c) {
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SASSERT(c.contains(e.var()));
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SASSERT(m_entries.begin() <= &e);
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SASSERT(&e < m_entries.end());
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for (literal l : c) e.m_clauses.push_back(l);
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e.m_clauses.push_back(null_literal);
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e.m_elim_stack.push_back(nullptr);
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add_elim_stack(e);
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TRACE("sat_mc_bug", tout << "adding: " << c << "\n";);
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}
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@ -212,7 +246,7 @@ namespace sat {
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e.m_clauses.push_back(l1);
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e.m_clauses.push_back(l2);
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e.m_clauses.push_back(null_literal);
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e.m_elim_stack.push_back(nullptr);
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add_elim_stack(e);
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TRACE("sat_mc_bug", tout << "adding (binary): " << l1 << " " << l2 << "\n";);
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}
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@ -224,18 +258,17 @@ namespace sat {
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for (unsigned i = 0; i < sz; ++i)
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e.m_clauses.push_back(c[i]);
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e.m_clauses.push_back(null_literal);
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e.m_elim_stack.push_back(nullptr);
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add_elim_stack(e);
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// TRACE("sat_mc_bug", tout << "adding (wrapper): "; for (literal l : c) tout << l << " "; tout << "\n";);
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}
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void model_converter::insert(entry & e, literal_vector const& c, elim_stackv const& elims) {
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void model_converter::insert(entry & e, literal_vector const& c) {
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SASSERT(c.contains(literal(e.var(), false)) || c.contains(literal(e.var(), true)));
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SASSERT(m_entries.begin() <= &e);
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SASSERT(&e < m_entries.end());
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for (literal l : c) e.m_clauses.push_back(l);
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e.m_clauses.push_back(null_literal);
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e.m_elim_stack.push_back(elims.empty() ? nullptr : alloc(elim_stack, elims));
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for (auto const& s : elims) VERIFY(legal_to_flip(s.second.var()));
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add_elim_stack(e);
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TRACE("sat_mc_bug", tout << "adding: " << c << "\n";);
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}
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@ -246,7 +279,7 @@ namespace sat {
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vector<entry>::const_iterator it = m_entries.begin();
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vector<entry>::const_iterator end = m_entries.end();
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for (; it != end; ++it) {
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SASSERT(it->var() < num_vars);
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SASSERT(it->var() == null_bool_var || it->var() < num_vars);
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if (it->get_kind() == ELIM_VAR) {
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svector<entry>::const_iterator it2 = it;
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it2++;
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@ -276,7 +309,8 @@ namespace sat {
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}
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std::ostream& model_converter::display(std::ostream& out, entry const& entry) const {
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out << " (" << entry.get_kind() << " " << entry.var();
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out << " (" << entry.get_kind() << " ";
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if (entry.var() != null_bool_var) out << entry.var();
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bool start = true;
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unsigned index = 0;
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for (literal l : entry.m_clauses) {
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@ -306,7 +340,7 @@ namespace sat {
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}
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out << ")";
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for (literal l : entry.m_clauses) {
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if (l != null_literal) {
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if (l != null_literal && l.var() != null_bool_var) {
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if (false && m_solver && m_solver->was_eliminated(l.var())) out << "\neliminated: " << l;
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}
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}
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@ -333,7 +367,7 @@ namespace sat {
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for (entry const& e : m_entries) {
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for (literal l : e.m_clauses) {
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if (l != null_literal) {
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if (l.var() > result)
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if (l.var() != null_bool_var && l.var() > result)
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result = l.var();
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}
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}
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@ -372,9 +406,11 @@ namespace sat {
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update_stack.push_back(null_literal);
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}
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}
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if (e.var() != null_bool_var) {
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swap(e.var(), clause.size(), clause);
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update_stack.append(clause);
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update_stack.push_back(null_literal);
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}
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clause.reset();
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}
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else {
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@ -66,11 +66,11 @@ namespace sat {
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unsigned ref_count() const { return m_refcount; }
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};
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enum kind { ELIM_VAR = 0, BLOCK_LIT, CCE, ACCE };
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enum kind { ELIM_VAR = 0, BCE, CCE, ACCE, ABCE, ATE };
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class entry {
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friend class model_converter;
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unsigned m_var:30;
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unsigned m_kind:2;
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bool_var m_var;
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kind m_kind;
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literal_vector m_clauses; // the different clauses are separated by null_literal
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sref_vector<elim_stack> m_elim_stack;
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entry(kind k, bool_var v): m_var(v), m_kind(k) {}
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@ -82,11 +82,12 @@ namespace sat {
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m_elim_stack.append(src.m_elim_stack);
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}
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bool_var var() const { return m_var; }
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kind get_kind() const { return static_cast<kind>(m_kind); }
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kind get_kind() const { return m_kind; }
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};
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private:
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vector<entry> m_entries;
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solver const* m_solver;
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elim_stackv m_elim_stack;
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void process_stack(model & m, literal_vector const& clause, elim_stackv const& stack) const;
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@ -96,6 +97,8 @@ namespace sat {
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void swap(bool_var v, unsigned sz, literal_vector& clause);
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void add_elim_stack(entry & e);
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public:
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model_converter();
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~model_converter();
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@ -103,11 +106,17 @@ namespace sat {
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void operator()(model & m) const;
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model_converter& operator=(model_converter const& other);
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elim_stackv& stackv() { return m_elim_stack; }
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entry & mk(kind k, bool_var v);
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void insert(entry & e, clause const & c);
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void insert(entry & e, literal l1, literal l2);
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void insert(entry & e, clause_wrapper const & c);
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void insert(entry & c, literal_vector const& covered_clause, elim_stackv const& elim_stack);
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void insert(entry & c, literal_vector const& covered_clause);
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void add_ate(literal_vector const& lits);
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void add_ate(literal l1, literal l2);
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void add_ate(clause const& c);
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bool empty() const { return m_entries.empty(); }
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@ -137,9 +146,11 @@ namespace sat {
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inline std::ostream& operator<<(std::ostream& out, model_converter::kind k) {
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switch (k) {
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case model_converter::ELIM_VAR: out << "elim"; break;
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case model_converter::BLOCK_LIT: out << "blocked"; break;
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case model_converter::BCE: out << "bce"; break;
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case model_converter::CCE: out << "cce"; break;
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case model_converter::ACCE: out << "acce"; break;
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case model_converter::ABCE: out << "abce"; break;
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case model_converter::ATE: out << "ate"; break;
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}
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return out;
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}
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@ -939,16 +939,21 @@ namespace sat {
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bool operator==(clause_ante const& a) const {
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return a.m_lit1 == m_lit1 && a.m_lit2 == m_lit2 && a.m_clause == m_clause;
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}
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std::ostream& display(std::ostream& out) const {
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std::ostream& display(std::ostream& out, literal lit) const {
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if (cls()) {
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out << *cls() << " ";
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}
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else {
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out << "(" << ~lit;
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}
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if (lit1() != null_literal) {
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out << lit1() << " ";
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out << " " << lit1();
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}
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if (lit2() != null_literal) {
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out << lit2() << " ";
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out << " " << lit2();
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}
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if (!cls()) out << ")";
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if (from_ri()) out << "ri";
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out << "\n";
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return out;
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}
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@ -978,7 +983,7 @@ namespace sat {
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simplifier & s;
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int m_counter;
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model_converter & mc;
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model_converter & m_mc;
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queue m_queue;
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literal_vector m_covered_clause; // covered clause
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@ -987,7 +992,6 @@ namespace sat {
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literal_vector m_tautology; // literals that are used in blocking tautology
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literal_vector m_new_intersection;
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svector<bool> m_in_intersection;
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sat::model_converter::elim_stackv m_elim_stack;
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unsigned m_ala_qhead;
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clause_wrapper m_clause;
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@ -995,7 +999,7 @@ namespace sat {
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vector<watch_list> & wlist):
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s(_s),
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m_counter(limit),
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mc(_mc),
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m_mc(_mc),
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m_queue(l, wlist),
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m_clause(null_literal, null_literal) {
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m_in_intersection.resize(s.s.num_vars() * 2, false);
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@ -1069,6 +1073,7 @@ namespace sat {
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m_tautology.reset();
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if (!process_var(l.var())) return false;
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bool first = true;
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VERIFY(s.value(l) == l_undef);
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for (watched & w : s.get_wlist(l)) {
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// when adding a blocked clause, then all non-learned clauses have to be considered for the
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// resolution intersection.
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@ -1184,18 +1189,18 @@ namespace sat {
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if (m_covered_antecedent[i] == clause_ante()) s.mark_visited(lit);
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if (s.is_marked(lit)) idx = i;
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}
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if (false && _blocked.var() == 16774) {
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if (false) {
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IF_VERBOSE(0, verbose_stream() << "covered: " << m_covered_clause << "\n";
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verbose_stream() << "tautology: " << m_tautology << "\n";
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verbose_stream() << "index: " << idx << "\n";
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for (unsigned i = idx; i > 0; --i) {
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m_covered_antecedent[i].display(verbose_stream() << "ante " << m_covered_clause[i] << ":");
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m_covered_antecedent[i].display(verbose_stream(), m_covered_clause[i]);
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});
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}
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for (unsigned i = idx; i > 0; --i) {
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literal lit = m_covered_clause[i];
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s.mark_visited(lit);
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continue;
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//s.mark_visited(lit);
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//continue;
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if (!s.is_marked(lit)) continue;
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clause_ante const& ante = m_covered_antecedent[i];
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if (ante.cls()) {
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@ -1222,13 +1227,16 @@ namespace sat {
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clause_ante const& ante = m_covered_antecedent[i];
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if (ante.from_ri() && blocked != ante.lit1()) {
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blocked = ante.lit1();
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m_elim_stack.push_back(std::make_pair(j, blocked));
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VERIFY(s.value(blocked) == l_undef);
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m_mc.stackv().push_back(std::make_pair(j, blocked));
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}
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m_covered_clause[j++] = lit;
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s.unmark_visited(lit);
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}
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}
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for (literal l : m_covered_clause) VERIFY(!s.is_marked(l));
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for (bool_var v = 0; v < s.s.num_vars(); ++v) VERIFY(!s.is_marked(literal(v, true)) && !s.is_marked(literal(v, false)));
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// unsigned sz0 = m_covered_clause.size();
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m_covered_clause.resize(j);
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VERIFY(j >= m_clause.size());
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@ -1263,6 +1271,7 @@ namespace sat {
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return true;
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}
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if (!s.is_marked(~lit)) {
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// if (m_covered_clause[0].var() == 10219) IF_VERBOSE(0, verbose_stream() << "ala: " << l << " " << lit << "\n");
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m_covered_clause.push_back(~lit);
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m_covered_antecedent.push_back(clause_ante(l, false));
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s.mark_visited(~lit);
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@ -1292,6 +1301,7 @@ namespace sat {
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if (lit1 == null_literal) {
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return true;
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}
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// if (m_covered_clause[0].var() == 10219) IF_VERBOSE(0, verbose_stream() << "ala: " << c << " " << lit1 << "\n");
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m_covered_clause.push_back(~lit1);
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m_covered_antecedent.push_back(clause_ante(c));
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s.mark_visited(~lit1);
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@ -1332,13 +1342,17 @@ namespace sat {
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return sz0 * 400 < m_covered_clause.size();
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}
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void reset_mark() {
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for (literal l : m_covered_clause) s.unmark_visited(l);
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}
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template<elim_type et>
|
||||
elim_type cce(literal& blocked, model_converter::kind& k) {
|
||||
bool is_tautology = false, first = true;
|
||||
bool first = true;
|
||||
unsigned sz = 0, sz0 = m_covered_clause.size();
|
||||
for (literal l : m_covered_clause) s.mark_visited(l);
|
||||
shuffle<literal>(m_covered_clause.size(), m_covered_clause.c_ptr(), s.s.m_rand);
|
||||
m_elim_stack.reset();
|
||||
m_mc.stackv().reset();
|
||||
m_ala_qhead = 0;
|
||||
|
||||
switch (et) {
|
||||
|
|
@ -1349,7 +1363,7 @@ namespace sat {
|
|||
k = model_converter::ACCE;
|
||||
break;
|
||||
default:
|
||||
k = model_converter::BLOCK_LIT;
|
||||
k = model_converter::BCE;
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -1361,48 +1375,77 @@ namespace sat {
|
|||
* and then check if any of the first sz0 literals are blocked.
|
||||
*/
|
||||
|
||||
while (!is_tautology && m_covered_clause.size() > sz && !above_threshold(sz0)) {
|
||||
SASSERT(!is_tautology);
|
||||
|
||||
if ((et == abce_t || et == acce_t || et == ate_t) && add_ala()) {
|
||||
for (literal l : m_covered_clause) s.unmark_visited(l);
|
||||
return ate_t;
|
||||
if (et == ate_t) {
|
||||
bool ala = add_ala();
|
||||
reset_mark();
|
||||
m_covered_clause.shrink(sz0);
|
||||
return ala ? ate_t : no_t;
|
||||
}
|
||||
|
||||
if (et == ate_t) {
|
||||
for (literal l : m_covered_clause) s.unmark_visited(l);
|
||||
return no_t;
|
||||
while (m_covered_clause.size() > sz && !above_threshold(sz0)) {
|
||||
|
||||
if ((et == abce_t || et == acce_t) && add_ala()) {
|
||||
reset_mark();
|
||||
if (first) {
|
||||
m_covered_clause.shrink(sz0);
|
||||
}
|
||||
else {
|
||||
/*
|
||||
* tautology depends on resolution intersection.
|
||||
* literals used for resolution intersection may have to be flipped.
|
||||
*/
|
||||
m_tautology.reset();
|
||||
for (literal l : m_covered_clause) {
|
||||
m_tautology.push_back(l);
|
||||
s.mark_visited(l);
|
||||
}
|
||||
minimize_covered_clause(m_covered_clause.size()-1);
|
||||
}
|
||||
return ate_t;
|
||||
}
|
||||
|
||||
if (first) {
|
||||
for (unsigned i = 0; i < sz0; ++i) {
|
||||
if (check_abce_tautology(m_covered_clause[i])) {
|
||||
blocked = m_covered_clause[i];
|
||||
is_tautology = true;
|
||||
break;
|
||||
reset_mark();
|
||||
#if 0
|
||||
if (sz0 == 3 && blocked.var() == 10219) {
|
||||
IF_VERBOSE(0, verbose_stream() << "abce: " << m_covered_clause << "\n";
|
||||
for (literal l : m_covered_clause) verbose_stream() << s.value(l) << "\n";
|
||||
);
|
||||
literal l = blocked;
|
||||
clause_use_list & neg_occs = s.m_use_list.get(~l);
|
||||
for (auto it = neg_occs.mk_iterator(); !it.at_end(); it.next()) {
|
||||
clause & c = it.curr();
|
||||
IF_VERBOSE(0, verbose_stream() << c << "\n");
|
||||
}
|
||||
}
|
||||
#endif
|
||||
m_covered_clause.shrink(sz0);
|
||||
if (et == bce_t) return bce_t;
|
||||
k = model_converter::ABCE;
|
||||
return abce_t;
|
||||
}
|
||||
}
|
||||
}
|
||||
first = false;
|
||||
}
|
||||
|
||||
if (is_tautology || et == abce_t || et == bce_t) {
|
||||
for (literal l : m_covered_clause) s.unmark_visited(l);
|
||||
m_covered_clause.shrink(sz0);
|
||||
if (!is_tautology) return no_t;
|
||||
if (et == bce_t) return bce_t;
|
||||
return abce_t;
|
||||
if (et == abce_t || et == bce_t) {
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Add resolution intersection while checking if the clause becomes a tautology.
|
||||
*/
|
||||
sz = m_covered_clause.size();
|
||||
if (et == cce_t || et == acce_t) {
|
||||
is_tautology = add_cla(blocked);
|
||||
if ((et == cce_t || et == acce_t) && add_cla(blocked)) {
|
||||
reset_mark();
|
||||
return et;
|
||||
}
|
||||
}
|
||||
for (literal l : m_covered_clause) s.unmark_visited(l);
|
||||
return is_tautology ? et : no_t;
|
||||
reset_mark();
|
||||
return no_t;
|
||||
}
|
||||
|
||||
// perform covered clause elimination.
|
||||
|
|
@ -1463,13 +1506,14 @@ namespace sat {
|
|||
case ate_t:
|
||||
w.set_learned(true);
|
||||
s.s.set_learned1(l2, l, true);
|
||||
m_mc.add_ate(m_covered_clause);
|
||||
break;
|
||||
case no_t:
|
||||
break;
|
||||
default:
|
||||
block_covered_binary(w, l, blocked, k);
|
||||
w.set_learned(true);
|
||||
s.s.set_learned1(l2, l, true);
|
||||
block_covered_binary(w, l, blocked, k);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
|
@ -1487,6 +1531,7 @@ namespace sat {
|
|||
inc_bc(r);
|
||||
switch (r) {
|
||||
case ate_t:
|
||||
m_mc.add_ate(m_covered_clause);
|
||||
s.set_learned(c);
|
||||
break;
|
||||
case no_t:
|
||||
|
|
@ -1518,32 +1563,33 @@ namespace sat {
|
|||
}
|
||||
|
||||
void block_covered_clause(clause& c, literal l, model_converter::kind k) {
|
||||
if (false && l.var() == 39021) {
|
||||
if (false) {
|
||||
IF_VERBOSE(0, verbose_stream() << "blocked: " << l << " @ " << c << " :covered " << m_covered_clause << "\n";
|
||||
s.m_use_list.display(verbose_stream() << "use " << l << ":", l);
|
||||
s.m_use_list.display(verbose_stream() << "use " << ~l << ":", ~l);
|
||||
/*s.s.display(verbose_stream());*/
|
||||
display_watch_list(verbose_stream() << ~l << ": ", s.s.m_cls_allocator, s.get_wlist(l)) << "\n";
|
||||
display_watch_list(verbose_stream() << l << ": ", s.s.m_cls_allocator, s.get_wlist(~l)) << "\n";
|
||||
);
|
||||
|
||||
}
|
||||
TRACE("blocked_clause", tout << "new blocked clause: " << c << "\n";);
|
||||
SASSERT(!s.is_external(l));
|
||||
model_converter::entry& new_entry = mc.mk(k, l.var());
|
||||
model_converter::entry& new_entry = m_mc.mk(k, l.var());
|
||||
for (literal lit : c) {
|
||||
if (lit != l && process_var(lit.var())) {
|
||||
m_queue.decreased(~lit);
|
||||
}
|
||||
}
|
||||
mc.insert(new_entry, m_covered_clause, m_elim_stack);
|
||||
m_mc.insert(new_entry, m_covered_clause);
|
||||
}
|
||||
|
||||
void block_covered_binary(watched const& w, literal l1, literal blocked, model_converter::kind k) {
|
||||
SASSERT(!s.is_external(blocked));
|
||||
model_converter::entry& new_entry = mc.mk(k, blocked.var());
|
||||
model_converter::entry& new_entry = m_mc.mk(k, blocked.var());
|
||||
literal l2 = w.get_literal();
|
||||
TRACE("blocked_clause", tout << "new blocked clause: " << l2 << " " << l1 << "\n";);
|
||||
s.set_learned(l1, l2);
|
||||
mc.insert(new_entry, m_covered_clause, m_elim_stack);
|
||||
m_mc.insert(new_entry, m_covered_clause);
|
||||
m_queue.decreased(~l2);
|
||||
}
|
||||
|
||||
|
|
@ -1571,6 +1617,13 @@ namespace sat {
|
|||
for (literal l2 : m_intersection) {
|
||||
watched* w = find_binary_watch(s.get_wlist(~l), ~l2);
|
||||
if (!w) {
|
||||
#if 0
|
||||
IF_VERBOSE(0, verbose_stream() << "bca " << l << " " << ~l2 << "\n");
|
||||
if (l.var() == 10219 && l2.var() == 10202) {
|
||||
IF_VERBOSE(0, s.s.display(verbose_stream()));
|
||||
exit(0);
|
||||
}
|
||||
#endif
|
||||
s.s.mk_bin_clause(l, ~l2, true);
|
||||
++s.m_num_bca;
|
||||
}
|
||||
|
|
@ -1777,13 +1830,19 @@ namespace sat {
|
|||
}
|
||||
|
||||
void simplifier::save_clauses(model_converter::entry & mc_entry, clause_wrapper_vector const & cs) {
|
||||
model_converter & mc = s.m_mc;
|
||||
for (auto & e : cs) {
|
||||
mc.insert(mc_entry, e);
|
||||
s.m_mc.insert(mc_entry, e);
|
||||
}
|
||||
}
|
||||
|
||||
void simplifier::add_non_learned_binary_clause(literal l1, literal l2) {
|
||||
#if 0
|
||||
if ((l1.var() == 2039 || l2.var() == 2039) &&
|
||||
(l1.var() == 27042 || l2.var() == 27042)) {
|
||||
IF_VERBOSE(1, verbose_stream() << "add_bin: " << l1 << " " << l2 << "\n");
|
||||
}
|
||||
#endif
|
||||
#if 0
|
||||
watched* w;
|
||||
watch_list & wlist1 = get_wlist(~l1);
|
||||
watch_list & wlist2 = get_wlist(~l2);
|
||||
|
|
@ -1804,6 +1863,9 @@ namespace sat {
|
|||
else {
|
||||
wlist2.push_back(watched(l1, false));
|
||||
}
|
||||
#else
|
||||
s.mk_bin_clause(l1, l2, false);
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -1820,6 +1882,11 @@ namespace sat {
|
|||
watch_list::iterator end2 = wlist2.end();
|
||||
for (; it2 != end2; ++it2) {
|
||||
if (it2->is_binary_clause() && it2->get_literal() == l) {
|
||||
if ((l.var() == 2039 || l2.var() == 2039) &&
|
||||
(l.var() == 27042 || l2.var() == 27042)) {
|
||||
IF_VERBOSE(1, verbose_stream() << "remove_bin: " << l << " " << l2 << "\n");
|
||||
}
|
||||
|
||||
TRACE("bin_clause_bug", tout << "removing: " << l << " " << it2->get_literal() << "\n";);
|
||||
m_sub_bin_todo.erase(bin_clause(l2, l, it2->is_learned()));
|
||||
continue;
|
||||
|
|
@ -1920,6 +1987,13 @@ namespace sat {
|
|||
|
||||
m_elim_counter -= num_pos * num_neg + before_lits;
|
||||
|
||||
if (false) {
|
||||
literal l(v, false);
|
||||
IF_VERBOSE(0,
|
||||
verbose_stream() << "elim: " << l << "\n";
|
||||
display_watch_list(verbose_stream() << ~l << ": ", s.m_cls_allocator, get_wlist(l)) << "\n";
|
||||
display_watch_list(verbose_stream() << l << ": ", s.m_cls_allocator, get_wlist(~l)) << "\n";);
|
||||
}
|
||||
// eliminate variable
|
||||
++s.m_stats.m_elim_var_res;
|
||||
VERIFY(!is_external(v));
|
||||
|
|
@ -1936,12 +2010,14 @@ namespace sat {
|
|||
|
||||
m_elim_counter -= num_pos * num_neg + before_lits;
|
||||
|
||||
|
||||
|
||||
for (auto & c1 : m_pos_cls) {
|
||||
for (auto & c2 : m_neg_cls) {
|
||||
m_new_cls.reset();
|
||||
if (!resolve(c1, c2, pos_l, m_new_cls))
|
||||
continue;
|
||||
// if (v == 39063) IF_VERBOSE(0, verbose_stream() << "elim: " << c1 << " + " << c2 << " -> " << m_new_cls << "\n");
|
||||
if (false && v == 27041) IF_VERBOSE(0, verbose_stream() << "elim: " << c1 << " + " << c2 << " -> " << m_new_cls << "\n");
|
||||
TRACE("resolution_new_cls", tout << c1 << "\n" << c2 << "\n-->\n" << m_new_cls << "\n";);
|
||||
if (cleanup_clause(m_new_cls))
|
||||
continue; // clause is already satisfied.
|
||||
|
|
@ -2053,7 +2129,7 @@ namespace sat {
|
|||
m_subsumption = p.subsumption();
|
||||
m_subsumption_limit = p.subsumption_limit();
|
||||
m_elim_vars = p.elim_vars();
|
||||
m_elim_vars_bdd = false && p.elim_vars_bdd(); // buggy
|
||||
m_elim_vars_bdd = false && p.elim_vars_bdd(); // buggy?
|
||||
m_elim_vars_bdd_delay = p.elim_vars_bdd_delay();
|
||||
m_incremental_mode = s.get_config().m_incremental && !p.override_incremental();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -333,6 +333,12 @@ namespace sat {
|
|||
}
|
||||
|
||||
void solver::mk_bin_clause(literal l1, literal l2, bool learned) {
|
||||
#if 0
|
||||
if ((l1.var() == 2039 || l2.var() == 2039) &&
|
||||
(l1.var() == 27042 || l2.var() == 27042)) {
|
||||
IF_VERBOSE(1, verbose_stream() << "mk_bin: " << l1 << " " << l2 << " " << learned << "\n");
|
||||
}
|
||||
#endif
|
||||
if (find_binary_watch(get_wlist(~l1), ~l2)) {
|
||||
assign(l1, justification());
|
||||
return;
|
||||
|
|
@ -346,12 +352,12 @@ namespace sat {
|
|||
if (w0->is_learned() && !learned) {
|
||||
w0->set_learned(false);
|
||||
}
|
||||
else {
|
||||
return;
|
||||
}
|
||||
w0 = find_binary_watch(get_wlist(~l2), l1);
|
||||
}
|
||||
if (w0) {
|
||||
if (w0->is_learned() && !learned) {
|
||||
VERIFY(w0);
|
||||
w0->set_learned(false);
|
||||
}
|
||||
return;
|
||||
}
|
||||
if (m_config.m_drat)
|
||||
|
|
@ -671,7 +677,6 @@ namespace sat {
|
|||
TRACE("sat_assign_core", tout << l << " " << j << " level: " << scope_lvl() << "\n";);
|
||||
if (at_base_lvl()) {
|
||||
if (m_config.m_drat) m_drat.add(l, !j.is_none());
|
||||
|
||||
j = justification(); // erase justification for level 0
|
||||
}
|
||||
m_assignment[l.index()] = l_true;
|
||||
|
|
@ -1215,7 +1220,7 @@ namespace sat {
|
|||
}
|
||||
}
|
||||
if (num_in > 0 || num_out > 0) {
|
||||
IF_VERBOSE(1, verbose_stream() << "(sat-sync out: " << num_out << " in: " << num_in << ")\n";);
|
||||
IF_VERBOSE(2, verbose_stream() << "(sat-sync out: " << num_out << " in: " << num_in << ")\n";);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1657,7 +1662,11 @@ namespace sat {
|
|||
|
||||
if (!check_clauses(m_model)) {
|
||||
IF_VERBOSE(0, verbose_stream() << "failure checking clauses on transformed model\n";);
|
||||
// IF_VERBOSE(10, m_mc.display(verbose_stream()));
|
||||
IF_VERBOSE(10, m_mc.display(verbose_stream()));
|
||||
//IF_VERBOSE(0, display_units(verbose_stream()));
|
||||
//IF_VERBOSE(0, display(verbose_stream()));
|
||||
IF_VERBOSE(0, for (bool_var v = 0; v < num; v++) verbose_stream() << v << ": " << m_model[v] << "\n";);
|
||||
|
||||
throw solver_exception("check model failed");
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -236,6 +236,10 @@ namespace sat {
|
|||
void set_learned(clause& c, bool learned);
|
||||
void set_learned(literal l1, literal l2, bool learned);
|
||||
void set_learned1(literal l1, literal l2, bool learned);
|
||||
void add_ate(clause& c) { m_mc.add_ate(c); }
|
||||
void add_ate(literal l1, literal l2) { m_mc.add_ate(l1, l2); }
|
||||
void add_ate(literal_vector const& lits) { m_mc.add_ate(lits); }
|
||||
|
||||
class scoped_disable_checkpoint {
|
||||
solver& s;
|
||||
public:
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue