mirror of
https://github.com/Z3Prover/z3
synced 2025-04-08 10:25:18 +00:00
update core generation to be partial, update maxres to use current model too
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
parent
3f8083dfa6
commit
b5bbf83847
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@ -367,8 +367,12 @@ private:
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void extract_model() {
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TRACE("sat", tout << "retrieve model\n";);
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model_ref md = alloc(model, m);
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sat::model const & ll_m = m_solver.get_model();
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if (ll_m.empty()) {
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m_model = 0;
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return;
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}
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model_ref md = alloc(model, m);
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atom2bool_var::iterator it = m_map.begin();
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atom2bool_var::iterator end = m_map.end();
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for (; it != end; ++it) {
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@ -156,7 +156,7 @@ public:
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lbool mus_solver() {
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init();
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init_local();
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while (true) {
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while (m_lower < m_upper) {
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TRACE("opt",
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display_vec(tout, m_asms.size(), m_asms.c_ptr());
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s().display(tout);
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@ -167,6 +167,7 @@ public:
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if (m_cancel) {
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return l_undef;
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}
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model_ref mdl;
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switch (is_sat) {
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case l_true:
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found_optimum();
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@ -174,6 +175,7 @@ public:
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case l_false:
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is_sat = process_unsat();
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if (is_sat != l_true) return is_sat;
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get_mus_model(mdl);
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break;
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case l_undef:
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return l_undef;
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@ -359,14 +361,16 @@ public:
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// likewise, if the cores are too big, don't block the cores.
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//
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process_unsat(cores);
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exprs cs;
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get_current_correction_set(cs);
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unsigned max_core = max_core_size(cores);
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if (cs.size() <= std::max(max_core, m_max_correction_set_size)) {
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if (!cs.empty() && cs.size() < max_core) {
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process_sat(cs);
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}
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else {
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process_unsat(cores);
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}
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}
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m_lower = m_upper;
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@ -465,6 +469,7 @@ public:
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cs.push_back(m_asms[i].get());
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}
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}
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IF_VERBOSE(2, verbose_stream() << "(opt.maxres correction set size: " << cs.size() << ")\n";);
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TRACE("opt", display_vec(tout << "new correction set: ", cs.size(), cs.c_ptr()););
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}
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@ -554,7 +559,7 @@ public:
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if (m_c.sat_enabled()) {
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// SAT solver core extracts some model
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// during unsat core computation.
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s().get_model(mdl);
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s().get_model(mdl);
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}
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else {
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w = m_mus.get_best_model(mdl);
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@ -451,7 +451,7 @@ namespace opt {
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m_maxsat_engine != symbol("sls")) {
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return;
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}
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m_params.set_bool("minimize_core", true);
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m_params.set_bool("minimize_core_partial", true);
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m_sat_solver = mk_inc_sat_solver(m, m_params);
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unsigned sz = get_solver().get_num_assertions();
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for (unsigned i = 0; i < sz; ++i) {
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@ -105,6 +105,7 @@ namespace sat {
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}
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m_minimize_lemmas = p.minimize_lemmas();
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m_minimize_core = p.minimize_core();
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m_minimize_core_partial = p.minimize_core_partial();
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m_optimize_model = p.optimize_model();
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m_dyn_sub_res = p.dyn_sub_res();
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}
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@ -69,6 +69,7 @@ namespace sat {
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bool m_minimize_lemmas;
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bool m_dyn_sub_res;
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bool m_minimize_core;
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bool m_minimize_core_partial;
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bool m_optimize_model;
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@ -41,7 +41,9 @@ namespace sat {
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}
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lbool mus::operator()() {
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bool minimize_partial = s.m_config.m_minimize_core_partial;
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flet<bool> _disable_min(s.m_config.m_minimize_core, false);
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flet<bool> _disable_min_partial(s.m_config.m_minimize_core_partial, false);
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flet<bool> _disable_opt(s.m_config.m_optimize_model, false);
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flet<bool> _is_active(m_is_active, true);
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TRACE("sat", tout << "old core: " << s.get_core() << "\n";);
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@ -58,7 +60,7 @@ namespace sat {
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--i;
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}
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}
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unsigned delta_time = 0;
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while (!core.empty()) {
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IF_VERBOSE(2, verbose_stream() << "(opt.mus reducing core: " << core.size() << " new core: " << mus.size() << ")\n";);
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TRACE("sat",
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@ -69,6 +71,11 @@ namespace sat {
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set_core();
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return l_undef;
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}
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if (minimize_partial && delta_time > 4) {
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break;
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}
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unsigned num_literals = core.size() + mus.size();
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literal lit = core.back();
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core.pop_back();
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unsigned sz = mus.size();
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@ -99,14 +106,6 @@ namespace sat {
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if (new_core.contains(~lit)) {
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mus.resize(sz);
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break;
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#if 0
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mus.pop_back();
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is_sat = s.check(mus.size(), mus.c_ptr());
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SASSERT(is_sat != l_true);
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if (is_sat != l_false) {
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return l_undef;
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}
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#endif
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}
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mus.resize(sz);
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TRACE("sat", tout << "new core: " << new_core << "\n";);
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@ -119,6 +118,14 @@ namespace sat {
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}
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break;
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}
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unsigned new_num_literals = core.size() + mus.size();
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if (new_num_literals == num_literals) {
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delta_time++;
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}
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else {
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delta_time = 0;
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}
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}
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TRACE("sat", tout << "new core: " << mus << "\n";);
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set_core();
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@ -19,5 +19,6 @@ def_module_params('sat',
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('minimize_lemmas', BOOL, True, 'minimize learned clauses'),
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('dyn_sub_res', BOOL, True, 'dynamic subsumption resolution for minimizing learned clauses'),
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('minimize_core', BOOL, False, 'minimize computed core'),
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('minimize_core_partial', BOOL, False, 'apply partial (cheap) core minimization'),
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('optimize_model', BOOL, False, 'enable optimization of soft constraints'),
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('dimacs.core', BOOL, False, 'extract core from DIMACS benchmarks')))
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@ -1730,7 +1730,7 @@ namespace sat {
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idx--;
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}
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reset_unmark(old_size);
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if (m_config.m_minimize_core) {
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if (m_config.m_minimize_core || m_config.m_minimize_core_partial) {
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// TBD:
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// apply optional clause minimization by detecting subsumed literals.
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// initial experiment suggests it has no effect.
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@ -938,7 +938,7 @@ namespace smt {
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m_new_atoms.pop_back();
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--i;
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}
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}
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}
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ptr_vector<atom> occs(m_var_occs[v]);
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std::sort(atoms.begin(), atoms.end(), compare_atoms());
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