mirror of
https://github.com/Z3Prover/z3
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abstract solver API
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
parent
9cf99e26a6
commit
d04e72819a
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@ -19,6 +19,7 @@ z3_add_component(rewriter
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factor_equivs.cpp
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factor_rewriter.cpp
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fpa_rewriter.cpp
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hoist_rewriter.cpp
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inj_axiom.cpp
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label_rewriter.cpp
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maximize_ac_sharing.cpp
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@ -34,7 +34,7 @@ Revision History:
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namespace sat {
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solver::solver(params_ref const & p, reslimit& l):
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m_rlimit(l),
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solver_core(l),
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m_checkpoint_enabled(true),
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m_config(p),
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m_par(nullptr),
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@ -3328,7 +3328,7 @@ namespace sat {
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bool_var solver::max_var(bool learned, bool_var v) {
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m_user_bin_clauses.reset();
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collect_bin_clauses(m_user_bin_clauses, learned);
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collect_bin_clauses(m_user_bin_clauses, learned, false);
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for (unsigned i = 0; i < m_user_bin_clauses.size(); ++i) {
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literal l1 = m_user_bin_clauses[i].first;
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literal l2 = m_user_bin_clauses[i].second;
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@ -3827,7 +3827,7 @@ namespace sat {
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max_cliques<neg_literal> mc;
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m_user_bin_clauses.reset();
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m_binary_clause_graph.reset();
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collect_bin_clauses(m_user_bin_clauses, true);
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collect_bin_clauses(m_user_bin_clauses, true, false);
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hashtable<literal_pair, pair_hash<literal_hash, literal_hash>, default_eq<literal_pair> > seen_bc;
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for (auto const& b : m_user_bin_clauses) {
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literal l1 = b.first;
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@ -37,6 +37,7 @@ Revision History:
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#include "sat/sat_drat.h"
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#include "sat/sat_parallel.h"
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#include "sat/sat_local_search.h"
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#include "sat/sat_solver_core.h"
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#include "util/params.h"
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#include "util/statistics.h"
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#include "util/stopwatch.h"
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@ -75,11 +76,10 @@ namespace sat {
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void collect_statistics(statistics & st) const;
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};
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class solver {
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class solver : public solver_core {
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public:
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struct abort_solver {};
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protected:
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reslimit& m_rlimit;
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bool m_checkpoint_enabled;
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config m_config;
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stats m_stats;
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@ -197,12 +197,12 @@ namespace sat {
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// Misc
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//
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// -----------------------
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void updt_params(params_ref const & p);
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void updt_params(params_ref const & p) override;
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static void collect_param_descrs(param_descrs & d);
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void collect_statistics(statistics & st) const;
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void collect_statistics(statistics & st) const override;
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void reset_statistics();
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void display_status(std::ostream & out) const;
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void display_status(std::ostream & out) const override;
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/**
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\brief Copy (non learned) clauses from src to this solver.
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@ -217,6 +217,9 @@ namespace sat {
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// Variable & Clause creation
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//
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// -----------------------
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void add_clause(unsigned num_lits, literal * lits, bool learned) override { mk_clause(num_lits, lits, learned); }
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bool_var add_var(bool ext) override { return mk_var(ext, true); }
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bool_var mk_var(bool ext = false, bool dvar = true);
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void mk_clause(literal_vector const& lits, bool learned = false) { mk_clause(lits.size(), lits.c_ptr(), learned); }
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void mk_clause(unsigned num_lits, literal * lits, bool learned = false);
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@ -279,29 +282,28 @@ namespace sat {
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//
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// -----------------------
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public:
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bool inconsistent() const { return m_inconsistent; }
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unsigned num_vars() const { return m_level.size(); }
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unsigned num_clauses() const;
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bool inconsistent() const override { return m_inconsistent; }
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unsigned num_vars() const override { return m_level.size(); }
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unsigned num_clauses() const override;
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void num_binary(unsigned& given, unsigned& learned) const;
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unsigned num_restarts() const { return m_restarts; }
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bool is_external(bool_var v) const { return m_external[v] != 0; }
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bool is_external(literal l) const { return is_external(l.var()); }
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void set_external(bool_var v);
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void set_non_external(bool_var v);
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bool is_external(bool_var v) const override { return m_external[v] != 0; }
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void set_external(bool_var v) override;
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void set_non_external(bool_var v) override;
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bool was_eliminated(bool_var v) const { return m_eliminated[v] != 0; }
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void set_eliminated(bool_var v, bool f) { m_eliminated[v] = f; }
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void set_eliminated(bool_var v, bool f) override { m_eliminated[v] = f; }
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bool was_eliminated(literal l) const { return was_eliminated(l.var()); }
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unsigned scope_lvl() const { return m_scope_lvl; }
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unsigned search_lvl() const { return m_search_lvl; }
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bool at_search_lvl() const { return m_scope_lvl == m_search_lvl; }
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bool at_base_lvl() const { return m_scope_lvl == 0; }
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bool at_base_lvl() const override { return m_scope_lvl == 0; }
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lbool value(literal l) const { return static_cast<lbool>(m_assignment[l.index()]); }
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lbool value(bool_var v) const { return static_cast<lbool>(m_assignment[literal(v, false).index()]); }
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unsigned lvl(bool_var v) const { return m_level[v]; }
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unsigned lvl(literal l) const { return m_level[l.var()]; }
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unsigned init_trail_size() const { return at_base_lvl() ? m_trail.size() : m_scopes[0].m_trail_lim; }
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unsigned init_trail_size() const override { return at_base_lvl() ? m_trail.size() : m_scopes[0].m_trail_lim; }
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unsigned trail_size() const { return m_trail.size(); }
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literal trail_literal(unsigned i) const { return m_trail[i]; }
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literal trail_literal(unsigned i) const override { return m_trail[i]; }
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literal scope_literal(unsigned n) const { return m_trail[m_scopes[n].m_trail_lim]; }
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void assign(literal l, justification j) {
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TRACE("sat_assign", tout << l << " previous value: " << value(l) << "\n";);
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@ -333,8 +335,8 @@ namespace sat {
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config const& get_config() const { return m_config; }
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void set_incremental(bool b) { m_config.m_incremental = b; }
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bool is_incremental() const { return m_config.m_incremental; }
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extension* get_extension() const { return m_ext.get(); }
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void set_extension(extension* e);
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extension* get_extension() const override { return m_ext.get(); }
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void set_extension(extension* e) override;
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bool set_root(literal l, literal r);
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void flush_roots();
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typedef std::pair<literal, literal> bin_clause;
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@ -369,13 +371,13 @@ namespace sat {
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//
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// -----------------------
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public:
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lbool check(unsigned num_lits = 0, literal const* lits = nullptr);
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lbool check(unsigned num_lits = 0, literal const* lits = nullptr) override;
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model const & get_model() const { return m_model; }
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model const & get_model() const override { return m_model; }
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bool model_is_current() const { return m_model_is_current; }
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literal_vector const& get_core() const { return m_core; }
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literal_vector const& get_core() const override { return m_core; }
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model_converter const & get_model_converter() const { return m_mc; }
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void flush(model_converter& mc) { mc.flush(m_mc); }
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void flush(model_converter& mc) override { mc.flush(m_mc); }
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void set_model(model const& mdl);
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char const* get_reason_unknown() const { return m_reason_unknown.c_str(); }
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bool check_clauses(model const& m) const;
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@ -545,10 +547,10 @@ namespace sat {
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bool_var max_var(bool learned, bool_var v);
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public:
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void user_push();
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void user_pop(unsigned num_scopes);
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void pop_to_base_level();
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unsigned num_user_scopes() const { return m_user_scope_literals.size(); }
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void user_push() override;
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void user_pop(unsigned num_scopes) override;
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void pop_to_base_level() override;
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unsigned num_user_scopes() const override { return m_user_scope_literals.size(); }
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reslimit& rlimit() { return m_rlimit; }
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// -----------------------
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//
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clause * const * begin_learned() const { return m_learned.begin(); }
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clause * const * end_learned() const { return m_learned.end(); }
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clause_vector const& learned() const { return m_learned; }
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clause_vector const& clauses() const { return m_clauses; }
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void collect_bin_clauses(svector<bin_clause> & r, bool learned, bool learned_only = false) const;
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clause_vector const& clauses() const override { return m_clauses; }
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void collect_bin_clauses(svector<bin_clause> & r, bool learned, bool learned_only) const override;
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// -----------------------
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//
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@ -654,11 +657,11 @@ namespace sat {
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//
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// -----------------------
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public:
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bool check_invariant() const;
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bool check_invariant() const override;
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void display(std::ostream & out) const;
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void display_watches(std::ostream & out) const;
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void display_watches(std::ostream & out, literal lit) const;
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void display_dimacs(std::ostream & out) const;
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void display_dimacs(std::ostream & out) const override;
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void display_wcnf(std::ostream & out, unsigned sz, literal const* lits, unsigned const* weights) const;
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void display_assignment(std::ostream & out) const;
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std::ostream& display_justification(std::ostream & out, justification const& j) const;
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116
src/sat/sat_solver_core.h
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116
src/sat/sat_solver_core.h
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@ -0,0 +1,116 @@
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/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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sat_solver_core.h
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Abstract:
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SAT solver API class.
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Author:
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Nikolaj Bjorner (nbjorner) 2019-02-06
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Revision History:
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--*/
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#ifndef SAT_SOLVER_CORE_H_
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#define SAT_SOLVER_CORE_H_
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#include "sat/sat_types.h"
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namespace sat {
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class solver_core {
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protected:
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reslimit& m_rlimit;
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public:
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solver_core(reslimit& l) : m_rlimit(l) {}
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~solver_core() {}
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virtual void pop_to_base_level() {}
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virtual bool at_base_lvl() const { return true; }
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// retrieve model if solver return sat
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virtual model const & get_model() const = 0;
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// retrieve core from assumptions
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virtual literal_vector const& get_core() const = 0;
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// is the state inconsistent?
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virtual bool inconsistent() const = 0;
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// number of variables and clauses
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virtual unsigned num_vars() const = 0;
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virtual unsigned num_clauses() const = 0;
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// check satisfiability
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virtual lbool check(unsigned num_lits = 0, literal const* lits = nullptr) = 0;
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// add clauses
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virtual void add_clause(unsigned n, literal* lits, bool is_redundant) = 0;
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void add_clause(literal l1, literal l2, bool is_redundant) {
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literal lits[2] = {l1, l2};
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add_clause(2, lits, is_redundant);
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}
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void add_clause(literal l1, literal l2, literal l3, bool is_redundant) {
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literal lits[3] = {l1, l2, l3};
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add_clause(3, lits, is_redundant);
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}
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// create boolean variable, tagged as external (= true) or internal (can be eliminated).
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virtual bool_var add_var(bool ext) = 0;
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// update parameters
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virtual void updt_params(params_ref const& p) {}
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virtual bool check_invariant() const { return true; }
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virtual void display_status(std::ostream& out) const {}
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virtual void display_dimacs(std::ostream& out) const {}
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virtual bool is_external(bool_var v) const { return true; }
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bool is_external(literal l) const { return is_external(l.var()); }
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virtual void set_external(bool_var v) {}
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virtual void set_non_external(bool_var v) {}
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virtual void set_eliminated(bool_var v, bool f) {}
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// optional support for user-scopes. Not relevant for sat_tactic integration.
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// it is only relevant for incremental mode SAT, which isn't wrapped (yet)
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virtual void user_push() { throw default_exception("optional API not supported"); }
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virtual void user_pop(unsigned num_scopes) {};
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virtual unsigned num_user_scopes() const { return 0;}
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// hooks for extension solver. really just ba_solver atm.
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virtual extension* get_extension() const { return nullptr; }
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virtual void set_extension(extension* e) { if (e) throw default_exception("optional API not supported"); }
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// The following methods are used when converting the state from the SAT solver back
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// to a set of assertions.
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// retrieve model converter that handles variable elimination and other transformations
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virtual void flush(model_converter& mc) {}
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// size of initial trail containing unit clauses
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virtual unsigned init_trail_size() const = 0;
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// literal at trail index i
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virtual literal trail_literal(unsigned i) const = 0;
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// collect n-ary clauses
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virtual clause_vector const& clauses() const = 0;
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// collect binary clauses
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typedef std::pair<literal, literal> bin_clause;
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virtual void collect_bin_clauses(svector<bin_clause> & r, bool learned, bool learned_only) const = 0;
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// collect statistics from sat solver
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virtual void collect_statistics(statistics & st) const {}
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};
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};
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#endif
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@ -57,7 +57,7 @@ struct goal2sat::imp {
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svector<sat::literal> m_result_stack;
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obj_map<app, sat::literal> m_cache;
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obj_hashtable<expr> m_interface_vars;
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sat::solver & m_solver;
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sat::solver_core & m_solver;
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atom2bool_var & m_map;
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dep2asm_map & m_dep2asm;
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sat::bool_var m_true;
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@ -69,7 +69,7 @@ struct goal2sat::imp {
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bool m_xor_solver;
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bool m_is_lemma;
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imp(ast_manager & _m, params_ref const & p, sat::solver & s, atom2bool_var & map, dep2asm_map& dep2asm, bool default_external):
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imp(ast_manager & _m, params_ref const & p, sat::solver_core & s, atom2bool_var & map, dep2asm_map& dep2asm, bool default_external):
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m(_m),
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pb(m),
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m_ext(nullptr),
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@ -97,30 +97,30 @@ struct goal2sat::imp {
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void mk_clause(sat::literal l) {
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TRACE("goal2sat", tout << "mk_clause: " << l << "\n";);
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m_solver.mk_clause(1, &l);
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m_solver.add_clause(1, &l, false);
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}
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void set_lemma_mode(bool f) { m_is_lemma = f; }
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void mk_clause(sat::literal l1, sat::literal l2) {
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TRACE("goal2sat", tout << "mk_clause: " << l1 << " " << l2 << "\n";);
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m_solver.mk_clause(l1, l2, m_is_lemma);
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m_solver.add_clause(l1, l2, m_is_lemma);
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}
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void mk_clause(sat::literal l1, sat::literal l2, sat::literal l3) {
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TRACE("goal2sat", tout << "mk_clause: " << l1 << " " << l2 << " " << l3 << "\n";);
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m_solver.mk_clause(l1, l2, l3, m_is_lemma);
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m_solver.add_clause(l1, l2, l3, m_is_lemma);
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}
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void mk_clause(unsigned num, sat::literal * lits) {
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TRACE("goal2sat", tout << "mk_clause: "; for (unsigned i = 0; i < num; i++) tout << lits[i] << " "; tout << "\n";);
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m_solver.mk_clause(num, lits, m_is_lemma);
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m_solver.add_clause(num, lits, m_is_lemma);
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}
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sat::bool_var mk_true() {
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if (m_true == sat::null_bool_var) {
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// create fake variable to represent true;
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m_true = m_solver.mk_var(false);
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m_true = m_solver.add_var(false);
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mk_clause(sat::literal(m_true, false)); // v is true
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}
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return m_true;
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}
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else {
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bool ext = m_default_external || !is_uninterp_const(t) || m_interface_vars.contains(t);
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sat::bool_var v = m_solver.mk_var(ext);
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sat::bool_var v = m_solver.add_var(ext);
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m_map.insert(t, v);
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l = sat::literal(v, sign);
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TRACE("sat", tout << "new_var: " << v << ": " << mk_ismt2_pp(t, m) << "\n";);
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}
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else {
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SASSERT(num <= m_result_stack.size());
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sat::bool_var k = m_solver.mk_var();
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sat::bool_var k = m_solver.add_var(false);
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sat::literal l(k, false);
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m_cache.insert(t, l);
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sat::literal * lits = m_result_stack.end() - num;
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}
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else {
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SASSERT(num <= m_result_stack.size());
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sat::bool_var k = m_solver.mk_var();
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sat::bool_var k = m_solver.add_var(false);
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sat::literal l(k, false);
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m_cache.insert(t, l);
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// l => /\ lits
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|
|||
m_result_stack.reset();
|
||||
}
|
||||
else {
|
||||
sat::bool_var k = m_solver.mk_var();
|
||||
sat::bool_var k = m_solver.add_var(false);
|
||||
sat::literal l(k, false);
|
||||
m_cache.insert(n, l);
|
||||
mk_clause(~l, ~c, t);
|
||||
|
@ -366,7 +366,7 @@ struct goal2sat::imp {
|
|||
m_result_stack.reset();
|
||||
}
|
||||
else {
|
||||
sat::bool_var k = m_solver.mk_var();
|
||||
sat::bool_var k = m_solver.add_var(false);
|
||||
sat::literal l(k, false);
|
||||
m_cache.insert(t, l);
|
||||
mk_clause(~l, l1, ~l2);
|
||||
|
@ -390,7 +390,7 @@ struct goal2sat::imp {
|
|||
return;
|
||||
}
|
||||
sat::literal_vector lits;
|
||||
sat::bool_var v = m_solver.mk_var(true);
|
||||
sat::bool_var v = m_solver.add_var(true);
|
||||
lits.push_back(sat::literal(v, true));
|
||||
convert_pb_args(num, lits);
|
||||
// ensure that = is converted to xor
|
||||
|
@ -472,7 +472,7 @@ struct goal2sat::imp {
|
|||
m_ext->add_pb_ge(sat::null_bool_var, wlits, k1);
|
||||
}
|
||||
else {
|
||||
sat::bool_var v = m_solver.mk_var(true);
|
||||
sat::bool_var v = m_solver.add_var(true);
|
||||
sat::literal lit(v, sign);
|
||||
m_ext->add_pb_ge(v, wlits, k.get_unsigned());
|
||||
TRACE("goal2sat", tout << "root: " << root << " lit: " << lit << "\n";);
|
||||
|
@ -503,7 +503,7 @@ struct goal2sat::imp {
|
|||
m_ext->add_pb_ge(sat::null_bool_var, wlits, k1);
|
||||
}
|
||||
else {
|
||||
sat::bool_var v = m_solver.mk_var(true);
|
||||
sat::bool_var v = m_solver.add_var(true);
|
||||
sat::literal lit(v, sign);
|
||||
m_ext->add_pb_ge(v, wlits, k.get_unsigned());
|
||||
TRACE("goal2sat", tout << "root: " << root << " lit: " << lit << "\n";);
|
||||
|
@ -518,8 +518,8 @@ struct goal2sat::imp {
|
|||
svector<wliteral> wlits;
|
||||
convert_pb_args(t, wlits);
|
||||
bool base_assert = (root && !sign && m_solver.num_user_scopes() == 0);
|
||||
sat::bool_var v1 = base_assert ? sat::null_bool_var : m_solver.mk_var(true);
|
||||
sat::bool_var v2 = base_assert ? sat::null_bool_var : m_solver.mk_var(true);
|
||||
sat::bool_var v1 = base_assert ? sat::null_bool_var : m_solver.add_var(true);
|
||||
sat::bool_var v2 = base_assert ? sat::null_bool_var : m_solver.add_var(true);
|
||||
m_ext->add_pb_ge(v1, wlits, k.get_unsigned());
|
||||
k.neg();
|
||||
for (wliteral& wl : wlits) {
|
||||
|
@ -533,7 +533,7 @@ struct goal2sat::imp {
|
|||
}
|
||||
else {
|
||||
sat::literal l1(v1, false), l2(v2, false);
|
||||
sat::bool_var v = m_solver.mk_var();
|
||||
sat::bool_var v = m_solver.add_var(false);
|
||||
sat::literal l(v, false);
|
||||
mk_clause(~l, l1);
|
||||
mk_clause(~l, l2);
|
||||
|
@ -553,7 +553,7 @@ struct goal2sat::imp {
|
|||
m_ext->add_at_least(sat::null_bool_var, lits, k.get_unsigned());
|
||||
}
|
||||
else {
|
||||
sat::bool_var v = m_solver.mk_var(true);
|
||||
sat::bool_var v = m_solver.add_var(true);
|
||||
sat::literal lit(v, false);
|
||||
m_ext->add_at_least(v, lits, k.get_unsigned());
|
||||
m_cache.insert(t, lit);
|
||||
|
@ -575,7 +575,7 @@ struct goal2sat::imp {
|
|||
m_ext->add_at_least(sat::null_bool_var, lits, lits.size() - k.get_unsigned());
|
||||
}
|
||||
else {
|
||||
sat::bool_var v = m_solver.mk_var(true);
|
||||
sat::bool_var v = m_solver.add_var(true);
|
||||
sat::literal lit(v, false);
|
||||
m_ext->add_at_least(v, lits, lits.size() - k.get_unsigned());
|
||||
m_cache.insert(t, lit);
|
||||
|
@ -588,8 +588,8 @@ struct goal2sat::imp {
|
|||
SASSERT(k.is_unsigned());
|
||||
sat::literal_vector lits;
|
||||
convert_pb_args(t->get_num_args(), lits);
|
||||
sat::bool_var v1 = (root && !sign) ? sat::null_bool_var : m_solver.mk_var(true);
|
||||
sat::bool_var v2 = (root && !sign) ? sat::null_bool_var : m_solver.mk_var(true);
|
||||
sat::bool_var v1 = (root && !sign) ? sat::null_bool_var : m_solver.add_var(true);
|
||||
sat::bool_var v2 = (root && !sign) ? sat::null_bool_var : m_solver.add_var(true);
|
||||
m_ext->add_at_least(v1, lits, k.get_unsigned());
|
||||
for (sat::literal& l : lits) {
|
||||
l.neg();
|
||||
|
@ -602,7 +602,7 @@ struct goal2sat::imp {
|
|||
}
|
||||
else {
|
||||
sat::literal l1(v1, false), l2(v2, false);
|
||||
sat::bool_var v = m_solver.mk_var();
|
||||
sat::bool_var v = m_solver.add_var(false);
|
||||
sat::literal l(v, false);
|
||||
mk_clause(~l, l1);
|
||||
mk_clause(~l, l2);
|
||||
|
@ -897,7 +897,7 @@ struct goal2sat::scoped_set_imp {
|
|||
};
|
||||
|
||||
|
||||
void goal2sat::operator()(goal const & g, params_ref const & p, sat::solver & t, atom2bool_var & m, dep2asm_map& dep2asm, bool default_external, bool is_lemma) {
|
||||
void goal2sat::operator()(goal const & g, params_ref const & p, sat::solver_core & t, atom2bool_var & m, dep2asm_map& dep2asm, bool default_external, bool is_lemma) {
|
||||
imp proc(g.m(), p, t, m, dep2asm, default_external);
|
||||
scoped_set_imp set(this, &proc);
|
||||
proc.set_lemma_mode(is_lemma);
|
||||
|
@ -916,7 +916,7 @@ void goal2sat::get_interpreted_atoms(expr_ref_vector& atoms) {
|
|||
|
||||
sat2goal::mc::mc(ast_manager& m): m(m), m_var2expr(m) {}
|
||||
|
||||
void sat2goal::mc::flush_smc(sat::solver& s, atom2bool_var const& map) {
|
||||
void sat2goal::mc::flush_smc(sat::solver_core& s, atom2bool_var const& map) {
|
||||
s.flush(m_smc);
|
||||
m_var2expr.resize(s.num_vars());
|
||||
map.mk_var_inv(m_var2expr);
|
||||
|
@ -1157,13 +1157,14 @@ struct sat2goal::imp {
|
|||
r.assert_expr(fml);
|
||||
}
|
||||
|
||||
void assert_clauses(ref<mc>& mc, sat::solver const & s, sat::clause_vector const& clauses, goal & r, bool asserted) {
|
||||
void assert_clauses(ref<mc>& mc, sat::solver_core const & s, sat::clause_vector const& clauses, goal & r, bool asserted) {
|
||||
ptr_buffer<expr> lits;
|
||||
unsigned small_lbd = 3; // s.get_config().m_gc_small_lbd;
|
||||
for (sat::clause* cp : clauses) {
|
||||
checkpoint();
|
||||
lits.reset();
|
||||
sat::clause const & c = *cp;
|
||||
if (asserted || m_learned || c.glue() <= s.get_config().m_gc_small_lbd) {
|
||||
if (asserted || m_learned || c.glue() <= small_lbd) {
|
||||
for (sat::literal l : c) {
|
||||
lits.push_back(lit2expr(mc, l));
|
||||
}
|
||||
|
@ -1172,11 +1173,11 @@ struct sat2goal::imp {
|
|||
}
|
||||
}
|
||||
|
||||
sat::ba_solver* get_ba_solver(sat::solver const& s) {
|
||||
sat::ba_solver* get_ba_solver(sat::solver_core const& s) {
|
||||
return dynamic_cast<sat::ba_solver*>(s.get_extension());
|
||||
}
|
||||
|
||||
void operator()(sat::solver & s, atom2bool_var const & map, goal & r, ref<mc> & mc) {
|
||||
void operator()(sat::solver_core & s, atom2bool_var const & map, goal & r, ref<mc> & mc) {
|
||||
if (s.at_base_lvl() && s.inconsistent()) {
|
||||
r.assert_expr(m.mk_false());
|
||||
return;
|
||||
|
@ -1196,7 +1197,7 @@ struct sat2goal::imp {
|
|||
|
||||
// collect binary clauses
|
||||
svector<sat::solver::bin_clause> bin_clauses;
|
||||
s.collect_bin_clauses(bin_clauses, m_learned);
|
||||
s.collect_bin_clauses(bin_clauses, m_learned, false);
|
||||
for (sat::solver::bin_clause const& bc : bin_clauses) {
|
||||
checkpoint();
|
||||
r.assert_expr(m.mk_or(lit2expr(mc, bc.first), lit2expr(mc, bc.second)));
|
||||
|
@ -1262,7 +1263,7 @@ struct sat2goal::scoped_set_imp {
|
|||
}
|
||||
};
|
||||
|
||||
void sat2goal::operator()(sat::solver & t, atom2bool_var const & m, params_ref const & p,
|
||||
void sat2goal::operator()(sat::solver_core & t, atom2bool_var const & m, params_ref const & p,
|
||||
goal & g, ref<mc> & mc) {
|
||||
imp proc(g.m(), p);
|
||||
scoped_set_imp set(this, &proc);
|
||||
|
|
|
@ -62,7 +62,7 @@ public:
|
|||
\warning conversion throws a tactic_exception, if it is interrupted (by set_cancel),
|
||||
an unsupported operator is found, or memory consumption limit is reached (set with param :max-memory).
|
||||
*/
|
||||
void operator()(goal const & g, params_ref const & p, sat::solver & t, atom2bool_var & m, dep2asm_map& dep2asm, bool default_external = false, bool is_lemma = false);
|
||||
void operator()(goal const & g, params_ref const & p, sat::solver_core & t, atom2bool_var & m, dep2asm_map& dep2asm, bool default_external = false, bool is_lemma = false);
|
||||
|
||||
void get_interpreted_atoms(expr_ref_vector& atoms);
|
||||
|
||||
|
@ -88,7 +88,7 @@ public:
|
|||
mc(ast_manager& m);
|
||||
~mc() override {}
|
||||
// flush model converter from SAT solver to this structure.
|
||||
void flush_smc(sat::solver& s, atom2bool_var const& map);
|
||||
void flush_smc(sat::solver_core& s, atom2bool_var const& map);
|
||||
void operator()(model_ref& md) override;
|
||||
void operator()(expr_ref& fml) override;
|
||||
model_converter* translate(ast_translation& translator) override;
|
||||
|
@ -113,7 +113,7 @@ public:
|
|||
\warning conversion throws a tactic_exception, if it is interrupted (by set_cancel),
|
||||
or memory consumption limit is reached (set with param :max-memory).
|
||||
*/
|
||||
void operator()(sat::solver & t, atom2bool_var const & m, params_ref const & p, goal & s, ref<mc> & mc);
|
||||
void operator()(sat::solver_core & t, atom2bool_var const & m, params_ref const & p, goal & s, ref<mc> & mc);
|
||||
|
||||
};
|
||||
|
||||
|
|
|
@ -29,12 +29,12 @@ class sat_tactic : public tactic {
|
|||
ast_manager & m;
|
||||
goal2sat m_goal2sat;
|
||||
sat2goal m_sat2goal;
|
||||
sat::solver m_solver;
|
||||
scoped_ptr<sat::solver_core> m_solver;
|
||||
params_ref m_params;
|
||||
|
||||
imp(ast_manager & _m, params_ref const & p):
|
||||
m(_m),
|
||||
m_solver(p, m.limit()),
|
||||
m_solver(alloc(sat::solver, p, m.limit())),
|
||||
m_params(p) {
|
||||
SASSERT(!m.proofs_enabled());
|
||||
updt_params(p);
|
||||
|
@ -51,7 +51,7 @@ class sat_tactic : public tactic {
|
|||
atom2bool_var map(m);
|
||||
obj_map<expr, sat::literal> dep2asm;
|
||||
sat::literal_vector assumptions;
|
||||
m_goal2sat(*g, m_params, m_solver, map, dep2asm);
|
||||
m_goal2sat(*g, m_params, *m_solver, map, dep2asm);
|
||||
TRACE("sat_solver_unknown", tout << "interpreted_atoms: " << map.interpreted_atoms() << "\n";
|
||||
for (auto const& kv : map) {
|
||||
if (!is_uninterp_const(kv.m_key))
|
||||
|
@ -60,15 +60,15 @@ class sat_tactic : public tactic {
|
|||
g->reset();
|
||||
g->m().compact_memory();
|
||||
|
||||
CASSERT("sat_solver", m_solver.check_invariant());
|
||||
IF_VERBOSE(TACTIC_VERBOSITY_LVL, m_solver.display_status(verbose_stream()););
|
||||
TRACE("sat_dimacs", m_solver.display_dimacs(tout););
|
||||
CASSERT("sat_solver", m_solver->check_invariant());
|
||||
IF_VERBOSE(TACTIC_VERBOSITY_LVL, m_solver->display_status(verbose_stream()););
|
||||
TRACE("sat_dimacs", m_solver->display_dimacs(tout););
|
||||
dep2assumptions(dep2asm, assumptions);
|
||||
lbool r = m_solver.check(assumptions.size(), assumptions.c_ptr());
|
||||
lbool r = m_solver->check(assumptions.size(), assumptions.c_ptr());
|
||||
if (r == l_false) {
|
||||
expr_dependency * lcore = nullptr;
|
||||
if (produce_core) {
|
||||
sat::literal_vector const& ucore = m_solver.get_core();
|
||||
sat::literal_vector const& ucore = m_solver->get_core();
|
||||
u_map<expr*> asm2dep;
|
||||
mk_asm2dep(dep2asm, asm2dep);
|
||||
for (unsigned i = 0; i < ucore.size(); ++i) {
|
||||
|
@ -83,7 +83,7 @@ class sat_tactic : public tactic {
|
|||
// register model
|
||||
if (produce_models) {
|
||||
model_ref md = alloc(model, m);
|
||||
sat::model const & ll_m = m_solver.get_model();
|
||||
sat::model const & ll_m = m_solver->get_model();
|
||||
TRACE("sat_tactic", for (unsigned i = 0; i < ll_m.size(); i++) tout << i << ":" << ll_m[i] << " "; tout << "\n";);
|
||||
for (auto const& kv : map) {
|
||||
expr * n = kv.m_key;
|
||||
|
@ -109,9 +109,9 @@ class sat_tactic : public tactic {
|
|||
#if 0
|
||||
IF_VERBOSE(TACTIC_VERBOSITY_LVL, verbose_stream() << "\"formula constrains interpreted atoms, recovering formula from sat solver...\"\n";);
|
||||
#endif
|
||||
m_solver.pop_to_base_level();
|
||||
m_solver->pop_to_base_level();
|
||||
ref<sat2goal::mc> mc;
|
||||
m_sat2goal(m_solver, map, m_params, *(g.get()), mc);
|
||||
m_sat2goal(*m_solver, map, m_params, *(g.get()), mc);
|
||||
g->add(mc.get());
|
||||
}
|
||||
g->inc_depth();
|
||||
|
@ -134,7 +134,7 @@ class sat_tactic : public tactic {
|
|||
}
|
||||
|
||||
void updt_params(params_ref const& p) {
|
||||
m_solver.updt_params(p);
|
||||
m_solver->updt_params(p);
|
||||
}
|
||||
|
||||
};
|
||||
|
@ -192,10 +192,10 @@ public:
|
|||
scoped_set_imp set(this, &proc);
|
||||
try {
|
||||
proc(g, result);
|
||||
proc.m_solver.collect_statistics(m_stats);
|
||||
proc.m_solver->collect_statistics(m_stats);
|
||||
}
|
||||
catch (sat::solver_exception & ex) {
|
||||
proc.m_solver.collect_statistics(m_stats);
|
||||
proc.m_solver->collect_statistics(m_stats);
|
||||
throw tactic_exception(ex.msg());
|
||||
}
|
||||
TRACE("sat_stats", m_stats.display_smt2(tout););
|
||||
|
|
|
@ -113,7 +113,7 @@ static void track_clauses(sat::solver const& src,
|
|||
sat::clause * const * it = src.begin_clauses();
|
||||
sat::clause * const * end = src.end_clauses();
|
||||
svector<sat::solver::bin_clause> bin_clauses;
|
||||
src.collect_bin_clauses(bin_clauses, false);
|
||||
src.collect_bin_clauses(bin_clauses, false, false);
|
||||
tracking_clauses.reserve(2*src.num_vars() + static_cast<unsigned>(end - it) + bin_clauses.size());
|
||||
|
||||
for (sat::bool_var v = 1; v < src.num_vars(); ++v) {
|
||||
|
|
|
@ -71,10 +71,7 @@ namespace smt {
|
|||
|
||||
void cg_table::display(std::ostream & out) const {
|
||||
out << "congruence table:\n";
|
||||
table::iterator it = m_table.begin();
|
||||
table::iterator end = m_table.end();
|
||||
for (; it != end; ++it) {
|
||||
enode * n = *it;
|
||||
for (enode * n : m_table) {
|
||||
out << mk_pp(n->get_owner(), m_manager) << "\n";
|
||||
}
|
||||
}
|
||||
|
@ -82,10 +79,7 @@ namespace smt {
|
|||
void cg_table::display_compact(std::ostream & out) const {
|
||||
if (!m_table.empty()) {
|
||||
out << "congruence table:\n";
|
||||
table::iterator it = m_table.begin();
|
||||
table::iterator end = m_table.end();
|
||||
for (; it != end; ++it) {
|
||||
enode * n = *it;
|
||||
for (enode * n : m_table) {
|
||||
out << "#" << n->get_owner()->get_id() << " ";
|
||||
}
|
||||
out << "\n";
|
||||
|
@ -94,10 +88,7 @@ namespace smt {
|
|||
|
||||
#ifdef Z3DEBUG
|
||||
bool cg_table::check_invariant() const {
|
||||
table::iterator it = m_table.begin();
|
||||
table::iterator end = m_table.end();
|
||||
for (; it != end; ++it) {
|
||||
enode * n = *it;
|
||||
for (enode * n : m_table) {
|
||||
CTRACE("cg_table", !contains_ptr(n), tout << "#" << n->get_owner_id() << "\n";);
|
||||
SASSERT(contains_ptr(n));
|
||||
}
|
||||
|
@ -136,9 +127,11 @@ namespace smt {
|
|||
}
|
||||
|
||||
bool cg_table::cg_eq::operator()(enode * n1, enode * n2) const {
|
||||
SASSERT(n1->get_num_args() == n2->get_num_args());
|
||||
SASSERT(n1->get_decl() == n2->get_decl());
|
||||
unsigned num = n1->get_num_args();
|
||||
if (num != n2->get_num_args()) {
|
||||
return false;
|
||||
}
|
||||
for (unsigned i = 0; i < num; i++)
|
||||
if (n1->get_arg(i)->get_root() != n2->get_arg(i)->get_root())
|
||||
return false;
|
||||
|
@ -205,10 +198,7 @@ namespace smt {
|
|||
}
|
||||
|
||||
void cg_table::reset() {
|
||||
ptr_vector<void>::iterator it = m_tables.begin();
|
||||
ptr_vector<void>::iterator end = m_tables.end();
|
||||
for (; it != end; ++it) {
|
||||
void * t = *it;
|
||||
for (void* t : m_tables) {
|
||||
switch (GET_TAG(t)) {
|
||||
case UNARY:
|
||||
dealloc(UNTAG(unary_table*, t));
|
||||
|
@ -225,10 +215,9 @@ namespace smt {
|
|||
}
|
||||
}
|
||||
m_tables.reset();
|
||||
obj_map<func_decl, unsigned>::iterator it2 = m_func_decl2id.begin();
|
||||
obj_map<func_decl, unsigned>::iterator end2 = m_func_decl2id.end();
|
||||
for (; it2 != end2; ++it2)
|
||||
m_manager.dec_ref(it2->m_key);
|
||||
for (auto const& kv : m_func_decl2id) {
|
||||
m_manager.dec_ref(kv.m_key);
|
||||
}
|
||||
m_func_decl2id.reset();
|
||||
}
|
||||
|
||||
|
|
|
@ -252,6 +252,8 @@ namespace smt {
|
|||
enode_bool_pair insert(enode * n) {
|
||||
// it doesn't make sense to insert a constant.
|
||||
SASSERT(n->get_num_args() > 0);
|
||||
SASSERT(!m_manager.is_and(n->get_owner()));
|
||||
SASSERT(!m_manager.is_or(n->get_owner()));
|
||||
enode * n_prime;
|
||||
void * t = get_table(n);
|
||||
switch (static_cast<table_kind>(GET_TAG(t))) {
|
||||
|
|
|
@ -22,6 +22,9 @@ Revision History:
|
|||
#include "ast/ast_util.h"
|
||||
#include "ast/ast_pp.h"
|
||||
#include "ast/pb_decl_plugin.h"
|
||||
#include "ast/rewriter/th_rewriter.h"
|
||||
#include "ast/rewriter/rewriter_def.h"
|
||||
#include "ast/rewriter/hoist_rewriter.h"
|
||||
#include "tactic/goal_shared_occs.h"
|
||||
#include "tactic/tactical.h"
|
||||
#include "tactic/generic_model_converter.h"
|
||||
|
@ -574,27 +577,36 @@ class solve_eqs_tactic : public tactic {
|
|||
}
|
||||
else if (m().is_or(f)) {
|
||||
flatten_or(f, args);
|
||||
//std::cout << "hoist or " << args.size() << "\n";
|
||||
for (unsigned i = 0; i < args.size(); ++i) {
|
||||
path.push_back(nnf_context(false, args, i));
|
||||
hoist_nnf(g, args.get(i), path, idx, depth + 1);
|
||||
path.pop_back();
|
||||
}
|
||||
}
|
||||
else {
|
||||
// std::cout << "no hoist " << mk_pp(f, m()) << "\n";
|
||||
}
|
||||
}
|
||||
|
||||
bool collect_hoist(goal const& g) {
|
||||
bool change = false;
|
||||
void collect_hoist(goal const& g) {
|
||||
unsigned size = g.size();
|
||||
vector<nnf_context> path;
|
||||
for (unsigned idx = 0; idx < size; idx++) {
|
||||
checkpoint();
|
||||
hoist_nnf(g, g.form(idx), path, idx, 0);
|
||||
}
|
||||
return change;
|
||||
}
|
||||
|
||||
void distribute_and_or(goal & g) {
|
||||
unsigned size = g.size();
|
||||
hoist_rewriter_star rw(m());
|
||||
th_rewriter thrw(m());
|
||||
expr_ref tmp(m()), tmp2(m());
|
||||
for (unsigned idx = 0; idx < size; idx++) {
|
||||
checkpoint();
|
||||
expr* f = g.form(idx);
|
||||
thrw(f, tmp);
|
||||
rw(tmp, tmp2);
|
||||
g.update(idx, tmp2);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void sort_vars() {
|
||||
|
@ -918,6 +930,9 @@ class solve_eqs_tactic : public tactic {
|
|||
m_subst = alloc(expr_substitution, m(), m_produce_unsat_cores, m_produce_proofs);
|
||||
m_norm_subst = alloc(expr_substitution, m(), m_produce_unsat_cores, m_produce_proofs);
|
||||
while (true) {
|
||||
if (m_context_solve) {
|
||||
distribute_and_or(*(g.get()));
|
||||
}
|
||||
collect_num_occs(*g);
|
||||
collect(*g);
|
||||
if (m_context_solve) {
|
||||
|
|
Loading…
Reference in a new issue