wip - add bit-vector validator plugins and logging

src/sat/smt/bv_theory_checker.cpp

@@ -0,0 +1,76 @@
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    bv_theory_checker.cpp
+
+Abstract:
+
+    Plugin for bitvector lemmas
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2022-08-28
+
+Notes:
+
+
+--*/
+#pragma once
+
+#include "sat/smt/euf_solver.h"
+#include "sat/smt/bv_theory_checker.h"
+
+
+namespace bv {
+
+
+    /**
+       bv is a generic rule used for internalizing bit-vectors. 
+       It corresponds to the Tseitin of bit-vectors.
+       
+       To bypass theory checking we pretend it is trusted.
+     */
+    bool theory_checker::check_bv(app* jst) { return true; }
+
+    /**
+       Let x, y be bit-vector terms and k be an assignment to constants bit2eq encodes the rule:
+
+       x = k, y = k
+       ------------
+          x = y
+     */
+    bool theory_checker::check_bit2eq(app* jst) { return true; }
+
+    /**
+       x[i] = false, y[i] = true
+       -------------------------
+           x != y
+     */
+    bool theory_checker::check_bit2ne(app* jst) { return true; }
+
+    /**
+          x = y
+       -----------
+       x[i] = y[i]
+     */
+    bool theory_checker::check_eq2bit(app* jst) { return true; }
+
+    /**
+         x != y, x is assigned on all but position i, x[j] = y[j] on other positions.
+         ----------------------------------------------------------------------------
+              x[i] != y[i]         
+     */
+    bool theory_checker::check_ne2bit(app* jst) { return true; }
+
+    /**
+        int2bv(bv2int(x)) = x when int2bv(bv2int(x)) has same sort as x
+
+        n = bv2int(x), n = z
+        --------------------
+           int2bv(z) = x              
+     */
+    bool theory_checker::check_bv2int(app* jst) { return true; }
+
+}