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add filter to detect circumventing the default semantics of bit-vector division with the use of the sat-based bit-vector solver. Provides a way to fix issue #190

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-08-24 16:27:07 -07:00
parent ee5f1ad6b6
commit ef7915858b
3 changed files with 8 additions and 0 deletions
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2
src/ast/rewriter/bv_rewriter.h
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@ -168,6 +168,8 @@ public:
}
br_status mk_eq_core(expr * lhs, expr * rhs, expr_ref & result);
bool hi_div0() const { return m_hi_div0; }
};
#endif

3
src/tactic/bv/bv1_blaster_tactic.cpp
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@ -28,6 +28,7 @@ Notes:
#include"rewriter_def.h"
#include"for_each_expr.h"
#include"cooperate.h"
#include"bv_rewriter.h"
class bv1_blaster_tactic : public tactic {
@ -491,6 +492,8 @@ tactic * mk_bv1_blaster_tactic(ast_manager & m, params_ref const & p) {
class is_qfbv_eq_probe : public probe {
public:
virtual result operator()(goal const & g) {
bv_rewriter rw(g.m());
if (!rw.hi_div0()) return false;
bv1_blaster_tactic t(g.m());
return t.is_target(g);

3
src/tactic/probe.cpp
View file

@ -23,6 +23,7 @@ Revision History:
#include"arith_decl_plugin.h"
#include"bv_decl_plugin.h"
#include"goal_util.h"
#include"bv_rewriter.h"
class memory_probe : public probe {
public:
@ -303,6 +304,8 @@ public:
class is_qfbv_probe : public probe {
public:
virtual result operator()(goal const & g) {
bv_rewriter rw(g.m());
if (!rw.hi_div0()) return false;
return !test<is_non_qfbv_predicate>(g);
}
};