na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/sat/smt/bv_solver.cpp

@@ -0,0 +1,56 @@
+/*++
+Copyright (c) 2020 Microsoft Corporation
+
+Module Name:
+
+    bv_internalize.cpp
+
+Abstract:
+
+    Internalize utilities for bit-vector solver plugin.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2020-09-02
+
+--*/
+
+#include "sat/smt/bv_solver.h"
+#include "sat/smt/euf_solver.h"
+#include "sat/smt/sat_th.h"
+#include "tactic/tactic_exception.h"
+
+namespace bv {
+
+    void solver::fixed_var_eh(theory_var v) {
+        
+    }
+
+    /**
+       \brief Find an unassigned bit for m_wpos[v], if such bit cannot be found invoke fixed_var_eh
+    */
+    void solver::find_wpos(theory_var v) {
+        literal_vector const & bits = m_bits[v];
+        unsigned sz                 = bits.size();
+        unsigned & wpos             = m_wpos[v];
+        unsigned init               = wpos;
+        for (; wpos < sz; wpos++) {
+            TRACE("find_wpos", tout << "curr bit: " << bits[wpos] << "\n";);
+            if (s().value(bits[wpos]) == l_undef) {
+                TRACE("find_wpos", tout << "moved wpos of v" << v << " to " << wpos << "\n";);
+                return;
+            }
+        }
+        wpos = 0;
+        for (; wpos < init; wpos++) {
+            if (s().value(bits[wpos]) == l_undef) {
+                TRACE("find_wpos", tout << "moved wpos of v" << v << " to " << wpos << "\n";);
+                return;
+            }
+        }
+        TRACE("find_wpos", tout << "v" << v << " is a fixed variable.\n";);
+        fixed_var_eh(v);
+    }
+
+
+}