mirror of
https://github.com/Z3Prover/z3
synced 2025-04-08 10:25:18 +00:00
fixes to cuts
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
parent
7d8b56027f
commit
dcd4fff284
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@ -32,7 +32,7 @@ public:
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~ackermannize_bv_tactic() override { }
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void operator()(goal_ref const & g, goal_ref_buffer & result) override {
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tactic_report report("ackermannize", *g);
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tactic_report report("ackermannize_bv", *g);
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fail_if_unsat_core_generation("ackermannize", g);
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fail_if_proof_generation("ackermannize", g);
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TRACE("ackermannize", g->display(tout << "in\n"););
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@ -202,7 +202,7 @@ extern "C" {
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SET_ERROR_CODE(Z3_INVALID_ARG, "If this is not what you want, then preprocess by optional bit-blasting and applying tseitin-cnf");
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RETURN_Z3(nullptr);
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}
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to_goal_ref(g)->display_dimacs(buffer);
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to_goal_ref(g)->display_dimacs(buffer, true);
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// Hack for removing the trailing '\n'
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std::string result = buffer.str();
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SASSERT(result.size() > 0);
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@ -695,13 +695,13 @@ extern "C" {
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Z3_CATCH_RETURN("");
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}
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Z3_string Z3_API Z3_solver_to_dimacs_string(Z3_context c, Z3_solver s) {
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Z3_string Z3_API Z3_solver_to_dimacs_string(Z3_context c, Z3_solver s, bool include_names) {
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Z3_TRY;
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LOG_Z3_solver_to_string(c, s);
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RESET_ERROR_CODE();
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init_solver(c, s);
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std::ostringstream buffer;
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to_solver_ref(s)->display_dimacs(buffer);
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to_solver_ref(s)->display_dimacs(buffer, include_names);
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return mk_c(c)->mk_external_string(buffer.str());
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Z3_CATCH_RETURN("");
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}
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@ -2422,7 +2422,7 @@ namespace z3 {
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fml));
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}
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std::string dimacs() const { return std::string(Z3_solver_to_dimacs_string(ctx(), m_solver)); }
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std::string dimacs(bool include_names = true) const { return std::string(Z3_solver_to_dimacs_string(ctx(), m_solver, include_names)); }
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param_descrs get_param_descrs() { return param_descrs(ctx(), Z3_solver_get_param_descrs(ctx(), m_solver)); }
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@ -6907,9 +6907,9 @@ class Solver(Z3PPObject):
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"""
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return Z3_solver_to_string(self.ctx.ref(), self.solver)
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def dimacs(self):
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def dimacs(self, include_names=True):
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"""Return a textual representation of the solver in DIMACS format."""
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return Z3_solver_to_dimacs_string(self.ctx.ref(), self.solver)
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return Z3_solver_to_dimacs_string(self.ctx.ref(), self.solver, include_names)
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def to_smt2(self):
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"""return SMTLIB2 formatted benchmark for solver's assertions"""
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@ -6633,9 +6633,9 @@ extern "C" {
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\brief Convert a solver into a DIMACS formatted string.
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\sa Z3_goal_to_diamcs_string for requirements.
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def_API('Z3_solver_to_dimacs_string', STRING, (_in(CONTEXT), _in(SOLVER)))
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def_API('Z3_solver_to_dimacs_string', STRING, (_in(CONTEXT), _in(SOLVER), _in(BOOL)))
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*/
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Z3_string Z3_API Z3_solver_to_dimacs_string(Z3_context c, Z3_solver s);
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Z3_string Z3_API Z3_solver_to_dimacs_string(Z3_context c, Z3_solver s, bool include_names);
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/*@}*/
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@ -20,7 +20,7 @@ Revision History:
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#include "ast.h"
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#include "display_dimacs.h"
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std::ostream& display_dimacs(std::ostream& out, expr_ref_vector const& fmls) {
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std::ostream& display_dimacs(std::ostream& out, expr_ref_vector const& fmls, bool include_names) {
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ast_manager& m = fmls.m();
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unsigned_vector expr2var;
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ptr_vector<expr> exprs;
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@ -113,7 +113,7 @@ std::ostream& display_dimacs(std::ostream& out, expr_ref_vector const& fmls) {
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}
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out << "0\n";
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}
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if (!is_from_dimacs) {
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if (include_names && !is_from_dimacs) {
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for (expr* e : exprs) {
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if (e && is_app(e)) {
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symbol const& n = to_app(e)->get_decl()->get_name();
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@ -21,6 +21,6 @@ Revision History:
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#include "ast.h"
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std::ostream& display_dimacs(std::ostream& out, expr_ref_vector const& fmls);
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std::ostream& display_dimacs(std::ostream& out, expr_ref_vector const& fmls, bool include_names);
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#endif /* DISPLAY_DIMACS_H__ */
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@ -147,19 +147,20 @@ struct expr2subpaving::imp {
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// Put t as a^k.
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void as_power(expr * t, expr * & a, unsigned & k) {
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if (!m_autil.is_power(t)) {
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expr* p = nullptr;
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if (!m_autil.is_power(t, a, p)) {
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a = t;
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k = 1;
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return;
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}
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rational _k;
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if (!m_autil.is_numeral(to_app(t)->get_arg(1), _k) || !_k.is_int() || !_k.is_unsigned()) {
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if (m_autil.is_numeral(p, _k) && _k.is_unsigned() && !_k.is_zero()) {
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k = _k.get_unsigned();
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}
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else {
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a = t;
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k = 1;
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return;
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}
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a = to_app(t)->get_arg(0);
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k = _k.get_unsigned();
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}
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subpaving::var process_mul(app * t, unsigned depth, mpz & n, mpz & d) {
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@ -168,7 +169,7 @@ struct expr2subpaving::imp {
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found_non_simplified();
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rational k;
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expr * m;
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if (m_autil.is_numeral(t->get_arg(0), k)) {
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if (m_autil.is_numeral(t->get_arg(0), k) && !k.is_zero()) {
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if (num_args != 2)
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found_non_simplified();
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qm().set(n, k.to_mpq().numerator());
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@ -24,6 +24,7 @@ namespace sat {
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aig_cuts::aig_cuts() {
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m_cut_set1.init(m_region, m_config.m_max_cutset_size + 1, UINT_MAX);
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m_cut_set2.init(m_region, m_config.m_max_cutset_size + 1, UINT_MAX);
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m_empty_cuts.init(m_region, m_config.m_max_cutset_size + 1, UINT_MAX);
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m_num_cut_calls = 0;
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m_num_cuts = 0;
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}
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@ -31,9 +32,9 @@ namespace sat {
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vector<cut_set> const& aig_cuts::operator()() {
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if (m_config.m_full) flush_roots();
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unsigned_vector node_ids = filter_valid_nodes();
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TRACE("aig_simplifier", display(tout););
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TRACE("cut_simplifier", display(tout););
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augment(node_ids);
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TRACE("aig_simplifier", display(tout););
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TRACE("cut_simplifier", display(tout););
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++m_num_cut_calls;
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return m_cuts;
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}
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@ -326,29 +327,31 @@ namespace sat {
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}
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else if (m_aig[v][0].is_const() || !insert_aux(v, n)) {
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m_literals.shrink(m_literals.size() - n.size());
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TRACE("aig_simplifier", tout << "duplicate\n";);
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TRACE("cut_simplifier", tout << "duplicate\n";);
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}
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SASSERT(!m_aig[v].empty());
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}
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void aig_cuts::add_node(bool_var v, uint64_t lut, unsigned sz, bool_var const* args) {
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TRACE("aig_simplifier", tout << v << " == " << cut::table2string(sz, lut) << " " << bool_var_vector(sz, args) << "\n";);
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TRACE("cut_simplifier", tout << v << " == " << cut::table2string(sz, lut) << " " << bool_var_vector(sz, args) << "\n";);
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reserve(v);
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unsigned offset = m_literals.size();
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node n(lut, sz, offset);
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for (unsigned i = 0; i < sz; ++i) {
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reserve(args[i]);
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m_literals.push_back(literal(args[i], false));
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}
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add_node(v, n);
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}
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void aig_cuts::add_node(literal head, bool_op op, unsigned sz, literal const* args) {
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TRACE("aig_simplifier", tout << head << " == " << op << " " << literal_vector(sz, args) << "\n";);
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TRACE("cut_simplifier", tout << head << " == " << op << " " << literal_vector(sz, args) << "\n";);
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unsigned v = head.var();
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reserve(v);
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unsigned offset = m_literals.size();
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node n(head.sign(), op, sz, offset);
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m_literals.append(sz, args);
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for (unsigned i = 0; i < sz; ++i) reserve(args[i].var());
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if (op == and_op || op == xor_op) {
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std::sort(m_literals.c_ptr() + offset, m_literals.c_ptr() + offset + sz);
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}
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@ -374,13 +377,12 @@ namespace sat {
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void aig_cuts::flush_roots() {
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if (m_roots.empty()) return;
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literal_vector to_root;
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for (unsigned i = 0; i < m_aig.size(); ++i) {
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to_root.push_back(literal(i, false));
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}
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to_root to_root;
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for (unsigned i = m_roots.size(); i-- > 0; ) {
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bool_var v = m_roots[i].first;
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literal r = m_roots[i].second;
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reserve(v);
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reserve(r.var());
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literal rr = to_root[r.var()];
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to_root[v] = r.sign() ? ~rr : rr;
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}
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flush_roots(to_root, cs);
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}
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m_roots.reset();
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TRACE("aig_simplifier", display(tout););
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TRACE("cut_simplifier", display(tout););
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}
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bool aig_cuts::flush_roots(bool_var var, literal_vector const& to_root, node& n) {
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bool aig_cuts::flush_roots(bool_var var, to_root const& to_root, node& n) {
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bool changed = false;
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for (unsigned i = 0; i < n.size(); ++i) {
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literal& lit = m_literals[n.offset() + i];
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return true;
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}
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void aig_cuts::flush_roots(literal_vector const& to_root, cut_set& cs) {
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void aig_cuts::flush_roots(to_root const& to_root, cut_set& cs) {
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for (unsigned j = 0; j < cs.size(); ++j) {
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for (unsigned v : cs[j]) {
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if (to_root[v] != literal(v, false)) {
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m_clause.push_back(lit);
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}
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m_clause.push_back(parity ? r : ~r);
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TRACE("aig_simplifier", tout << "validate: " << m_clause << "\n";);
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TRACE("cut_simplifier", tout << "validate: " << m_clause << "\n";);
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on_clause(m_clause);
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}
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return;
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@ -723,7 +725,7 @@ namespace sat {
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m_clause.push_back(lit);
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}
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m_clause.push_back(0 == (n.lut() & (1ull << i)) ? ~r : r);
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TRACE("aig_simplifier", tout << n.lut() << " " << m_clause << "\n";);
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TRACE("cut_simplifier", tout << n.lut() << " " << m_clause << "\n";);
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on_clause(m_clause);
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}
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return;
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@ -769,7 +771,7 @@ namespace sat {
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svector<bool> is_var;
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validator(aig_cuts& t):t(t),s(p, lim) {
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p.set_bool("aig_simplifier", false);
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p.set_bool("cut_simplifier", false);
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s.updt_params(p);
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}
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@ -102,7 +102,7 @@ namespace sat {
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vector<svector<node>> m_aig;
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literal_vector m_literals;
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region m_region;
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cut_set m_cut_set1, m_cut_set2;
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cut_set m_cut_set1, m_cut_set2, m_empty_cuts;
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vector<cut_set> m_cuts;
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unsigned_vector m_max_cutset_size;
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unsigned_vector m_last_touched;
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@ -117,6 +117,23 @@ namespace sat {
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uint64_t m_luts[6];
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literal m_lits[6];
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class to_root {
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literal_vector m_to_root;
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void reserve(bool_var v) {
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while (v >= m_to_root.size()) {
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m_to_root.push_back(literal(m_to_root.size(), false));
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}
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}
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public:
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literal operator[](bool_var v) const {
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return (v < m_to_root.size()) ? m_to_root[v] : literal(v, false);
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}
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literal& operator[](bool_var v) {
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reserve(v);
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return m_to_root[v];
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}
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};
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class lut {
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aig_cuts& a;
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node const* n;
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@ -132,7 +149,7 @@ namespace sat {
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bool is_touched(bool_var v, node const& n);
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bool is_touched(literal lit) const { return is_touched(lit.var()); }
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bool is_touched(bool_var v) const { return m_last_touched[v] + m_aig.size() >= m_num_cut_calls * m_aig.size(); }
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bool is_touched(bool_var v) const { return v < m_last_touched.size() && m_last_touched[v] + m_aig.size() >= m_num_cut_calls * m_aig.size(); }
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void reserve(unsigned v);
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bool insert_aux(unsigned v, node const& n);
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void init_cut_set(unsigned id);
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void augment_lut(unsigned v, lut const& n, cut_set& cs);
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void augment_lut_rec(unsigned v, lut const& n, cut& a, unsigned idx, cut_set& cs);
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cut_set const& lit2cuts(literal lit) const { return m_cuts[lit.var()]; }
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cut_set const& lit2cuts(literal lit) const { return lit.var() < m_cuts.size() ? m_cuts[lit.var()] : m_empty_cuts; }
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bool insert_cut(unsigned v, cut const& c, cut_set& cs);
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void flush_roots();
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bool flush_roots(bool_var var, literal_vector const& to_root, node& n);
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void flush_roots(literal_vector const& to_root, cut_set& cs);
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bool flush_roots(bool_var var, to_root const& to_root, node& n);
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void flush_roots(to_root const& to_root, cut_set& cs);
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cut_val eval(node const& n, cut_eval const& env) const;
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lbool get_value(bool_var v) const;
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@ -198,7 +215,7 @@ namespace sat {
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void set_on_clause_add(on_clause_t& on_clause_add);
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void set_on_clause_del(on_clause_t& on_clause_del);
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void inc_max_cutset_size(unsigned v) { m_max_cutset_size[v] += 10; touch(v); }
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void inc_max_cutset_size(unsigned v) { m_max_cutset_size.reserve(v + 1, 0); m_max_cutset_size[v] += 10; touch(v); }
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unsigned max_cutset_size(unsigned v) const { return v == UINT_MAX ? m_config.m_max_cutset_size : m_max_cutset_size[v]; }
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vector<cut_set> const & operator()();
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@ -206,7 +223,7 @@ namespace sat {
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void cut2def(on_clause_t& on_clause, cut const& c, literal r);
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void touch(bool_var v) { m_last_touched[v] = v + m_num_cut_calls * m_aig.size(); }
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void touch(bool_var v) { m_last_touched.reserve(v + 1, false); m_last_touched[v] = v + m_num_cut_calls * m_aig.size(); }
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cut_eval simulate(unsigned num_rounds);
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@ -56,6 +56,7 @@ namespace sat {
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SASSERT(c.size() > 2);
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unsigned filter = get_clause_filter(c);
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s.init_visited();
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TRACE("sat_xor", tout << c << "\n";);
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bool parity = false;
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unsigned mask = 0, i = 0;
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for (literal l : c) {
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@ -110,6 +111,7 @@ namespace sat {
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s.set_external(l.var());
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}
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if (parity == (lits.size() % 2 == 0)) lits[0].neg();
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TRACE("sat_xor", tout << parity << ": " << lits << "\n";);
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m_on_xor(lits);
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}
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@ -129,6 +131,7 @@ namespace sat {
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m_missing.push_back(i);
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}
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}
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TRACE("sat_xor", tout << l1 << " " << l2 << "\n";);
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return update_combinations(c, parity, mask);
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}
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@ -136,7 +139,7 @@ namespace sat {
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bool parity2 = false;
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for (literal l : c2) {
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if (!s.is_visited(l.var())) return false;
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parity2 ^= l.sign();
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parity2 ^= !l.sign();
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}
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if (c2.size() == c.size() && parity2 != parity) {
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return false;
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@ -145,6 +148,7 @@ namespace sat {
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m_clauses_to_remove.push_back(&c2);
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c2.mark_used();
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}
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TRACE("sat_xor", tout << c2 << "\n";);
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// insert missing
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unsigned mask = 0;
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m_missing.reset();
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@ -182,7 +186,8 @@ namespace sat {
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}
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// return true if xor clause is covered.
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unsigned sz = c.size();
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for (unsigned i = 0; i < (1ul << sz); ++i) {
|
||||
for (unsigned i = 0; i < (1ul << sz); ++i) {
|
||||
TRACE("sat_xor", tout << i << ": " << parity << " " << m_parity[sz][i] << " " << get_combination(i) << "\n";);
|
||||
if (parity == m_parity[sz][i] && !get_combination(i)) {
|
||||
return false;
|
||||
}
|
||||
|
|
|
@ -58,10 +58,10 @@ std::ostream& solver::display(std::ostream & out, unsigned n, expr* const* assum
|
|||
return out;
|
||||
}
|
||||
|
||||
std::ostream& solver::display_dimacs(std::ostream& out) const {
|
||||
std::ostream& solver::display_dimacs(std::ostream& out, bool include_names) const {
|
||||
expr_ref_vector fmls(get_manager());
|
||||
get_assertions(fmls);
|
||||
return ::display_dimacs(out, fmls);
|
||||
return ::display_dimacs(out, fmls, include_names);
|
||||
}
|
||||
|
||||
void solver::get_assertions(expr_ref_vector& fmls) const {
|
||||
|
|
|
@ -234,7 +234,7 @@ public:
|
|||
/**
|
||||
\brief Display the content of this solver in DIMACS format
|
||||
*/
|
||||
std::ostream& display_dimacs(std::ostream & out) const;
|
||||
std::ostream& display_dimacs(std::ostream & out, bool include_names = true) const;
|
||||
|
||||
/**
|
||||
\brief expose model converter when solver produces partially reduced set of assertions.
|
||||
|
|
|
@ -57,7 +57,7 @@ class bit_blaster_tactic : public tactic {
|
|||
if (proofs_enabled && m_blast_quant)
|
||||
throw tactic_exception("quantified variable blasting does not support proof generation");
|
||||
|
||||
tactic_report report("bit-blaster", *g);
|
||||
tactic_report report("bit-blast", *g);
|
||||
|
||||
TRACE("before_bit_blaster", g->display(tout););
|
||||
m_num_steps = 0;
|
||||
|
|
|
@ -184,7 +184,7 @@ public:
|
|||
m_mc = nullptr;
|
||||
unsigned num_reduced = 0;
|
||||
{
|
||||
tactic_report report("bv-size-reduction", g);
|
||||
tactic_report report("reduce-bv-size", g);
|
||||
collect_bounds(g);
|
||||
|
||||
// create substitution
|
||||
|
|
|
@ -431,10 +431,10 @@ void goal::display_ll(std::ostream & out) const {
|
|||
/**
|
||||
\brief Assumes that the formula is already in CNF.
|
||||
*/
|
||||
void goal::display_dimacs(std::ostream & out) const {
|
||||
void goal::display_dimacs(std::ostream & out, bool include_names) const {
|
||||
expr_ref_vector fmls(m());
|
||||
get_formulas(fmls);
|
||||
::display_dimacs(out, fmls);
|
||||
::display_dimacs(out, fmls, include_names);
|
||||
}
|
||||
|
||||
unsigned goal::num_exprs() const {
|
||||
|
|
|
@ -137,7 +137,7 @@ public:
|
|||
void display(std::ostream & out) const;
|
||||
void display_ll(std::ostream & out) const;
|
||||
void display_as_and(std::ostream & out) const;
|
||||
void display_dimacs(std::ostream & out) const;
|
||||
void display_dimacs(std::ostream & out, bool include_names) const;
|
||||
void display_with_dependencies(ast_printer & prn, std::ostream & out) const;
|
||||
void display_with_dependencies(ast_printer_context & ctx) const;
|
||||
void display_with_dependencies(std::ostream & out) const;
|
||||
|
|
Loading…
Reference in a new issue