arrays (#4684)

* arrays Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * arrays Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * arrays Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * fill Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * update drat and fix euf bugs Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * const qualifiers Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * reorg ba Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * reorg Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * build warnings Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2025-04-30 20:35:51 +00:00 · 2020-09-13 19:29:59 -07:00 · 2020-09-13 19:29:59 -07:00 · 796e2fd9eb
commit 796e2fd9eb
parent d56dd1db7b
79 changed files with 2571 additions and 1850 deletions
--- a/src/sat/smt/ba_card.h
+++ b/src/sat/smt/ba_card.h
@ -0,0 +1,70 @@
+/*++
+Copyright (c) 2017 Microsoft Corporation
+
+Module Name:
+
+    ba_card.h
+
+Abstract:
+ 
+    Interface for Cardinality constraints.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2017-01-30
+
+--*/
+
+#pragma once 
+
+#include "sat/sat_types.h"
+#include "sat/smt/ba_constraint.h"
+
+
+namespace ba {
+
+    // base class for pb and cardinality constraints
+    class pb_base : public constraint {
+    protected:
+        unsigned       m_k;
+    public:
+        pb_base(ba::tag_t t, unsigned id, literal l, unsigned sz, size_t osz, unsigned k) :
+            constraint(t, id, l, sz, osz), m_k(k) {
+            VERIFY(k < 4000000000);
+        }
+        virtual void set_k(unsigned k) { VERIFY(k < 4000000000);  m_k = k; }
+        virtual unsigned get_coeff(unsigned i) const { UNREACHABLE(); return 0; }
+        unsigned k() const { return m_k; }
+        bool well_formed() const override;
+    };
+
+    class card : public pb_base {
+        literal        m_lits[0];
+    public:
+        static size_t get_obj_size(unsigned num_lits) { return sat::constraint_base::obj_size(sizeof(card) + num_lits * sizeof(literal)); }
+        card(unsigned id, literal lit, literal_vector const& lits, unsigned k);
+        literal operator[](unsigned i) const { return m_lits[i]; }
+        literal& operator[](unsigned i) { return m_lits[i]; }
+        literal const* begin() const { return m_lits; }
+        literal const* end() const { return static_cast<literal const*>(m_lits) + m_size; }
+        void negate() override;
+        void swap(unsigned i, unsigned j) override { std::swap(m_lits[i], m_lits[j]); }
+        literal_vector literals() const override { return literal_vector(m_size, m_lits); }
+        bool is_watching(literal l) const override;
+        literal get_lit(unsigned i) const override { return m_lits[i]; }
+        void set_lit(unsigned i, literal l) override { m_lits[i] = l; }
+        unsigned get_coeff(unsigned i) const override { return 1; }
+        double get_reward(ba::solver_interface const& s, sat::literal_occs_fun& occs) const override;
+        std::ostream& display(std::ostream& out) const override;
+        std::ostream& display(std::ostream& out, solver_interface const& s, bool values) const override;
+        void clear_watch(solver_interface& s) override;
+        bool init_watch(solver_interface& s) override;        
+        bool is_extended_binary(literal_vector& r) const override;
+        bool validate_unit_propagation(solver_interface const& s, literal alit) const override;
+        lbool eval(sat::model const& m) const override;
+        lbool eval(solver_interface const& s) const override;
+        void init_use_list(sat::ext_use_list& ul) const override;
+        bool is_blocked(sat::simplifier& s, literal lit) const override;
+
+    };
+}