running updates to bv_solver (#4674)

* 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> * 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> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * dbg Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * bv Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * drat and fresh Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * move ackerman functionality Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * na Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * debugability Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * towards debugability Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com> * missing file 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> * remove csp Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2025-04-29 11:55:51 +00:00 · 2020-09-07 20:35:32 -07:00 · 2020-09-07 20:35:32 -07:00 · d02b0cde7a
commit d02b0cde7a
parent 4d1a2a2784
63 changed files with 3060 additions and 3095 deletions
--- a/src/sat/smt/bv_ackerman.h
+++ b/src/sat/smt/bv_ackerman.h
@ -0,0 +1,77 @@
+/*++
+Copyright (c) 2020 Microsoft Corporation
+
+Module Name:
+
+    euf_ackerman.h
+
+Abstract:
+
+    Ackerman reduction plugin for EUF
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2020-08-25
+
+--*/
+#pragma once
+
+#include "util/dlist.h"
+#include "sat/smt/atom2bool_var.h"
+#include "sat/smt/sat_th.h"
+
+namespace bv {
+
+    class solver;
+
+    class ackerman {
+
+        struct vv : dll_base<vv> {
+            euf::theory_var v1, v2;
+            unsigned   m_count{ 0 };
+            unsigned   m_glue{ UINT_MAX };
+            vv():v1(euf::null_theory_var), v2(euf::null_theory_var) {}
+            vv(euf::theory_var v1, euf::theory_var v2):v1(v1), v2(v2) {}
+        };
+
+        struct vv_eq {
+            bool operator()(vv const* a, vv const* b) const {
+                return a->v1 == b->v1 && a->v2 == b->v2;
+            }
+        };
+        
+        struct vv_hash {
+            unsigned operator()(vv const* a) const {
+                return mk_mix(a->v1, a->v2, 0);
+            }
+        };
+
+        typedef hashtable<vv*, vv_hash, vv_eq> table_t;
+
+        solver&       s;
+        table_t       m_table;
+        vv*           m_queue { nullptr };
+        vv*           m_tmp_vv { nullptr };
+        unsigned      m_gc_threshold { 1 };
+        unsigned      m_propagate_high_watermark { 10000 };
+        unsigned      m_propagate_low_watermark { 10 };
+        unsigned      m_num_propagations_since_last_gc { 0 };
+        bool_vector   m_diff_levels;
+
+        void update_glue(vv& v);
+        void reset();
+        void new_tmp();
+        void remove(vv* inf);
+        void gc();
+        void add_cc(euf::theory_var v1, euf::theory_var v2);
+
+    public:
+        ackerman(solver& s);
+        ~ackerman();
+
+        void used_eq_eh(euf::theory_var v1, euf::theory_var v2);
+
+        void propagate();
+    };
+
+};