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Merge branch 'unstable' of https://git01.codeplex.com/z3 into unstable

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This commit is contained in:
Nikolaj Bjorner 2012-10-20 19:11:50 -07:00
parent 1cae83183a 090ca2e46c
commit 61de6433c0
3 changed files with 25 additions and 30 deletions
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23
lib/dl_util.h
View file

@ -171,19 +171,32 @@ namespace datalog {
*/
void display_fact(context & ctx, app * f, std::ostream & out);
class scoped_coarse_proof {
ast_manager& m;
class scoped_proof_mode {
ast_manager& m;
proof_gen_mode m_mode;
public:
scoped_coarse_proof(ast_manager& m): m(m) {
scoped_proof_mode(ast_manager& m, proof_gen_mode mode): m(m) {
m_mode = m.proof_mode();
m.toggle_proof_mode(PGM_COARSE);
m.toggle_proof_mode(mode);
}
~scoped_coarse_proof() {
~scoped_proof_mode() {
m.toggle_proof_mode(m_mode);
}
};
class scoped_coarse_proof : public scoped_proof_mode {
public:
scoped_coarse_proof(ast_manager& m): scoped_proof_mode(m, PGM_COARSE) {}
};
class scoped_no_proof : public scoped_proof_mode {
public:
scoped_no_proof(ast_manager& m): scoped_proof_mode(m, PGM_DISABLED) {}
};
class variable_intersection
{
bool values_match(const expr * v1, const expr * v2);

12
lib/pdr_context.cpp
View file

@ -1618,24 +1618,16 @@ namespace pdr {
- T(x0,x1,x) for transition
- phi(x) for n.state()
- psi(x0,x1,x) for psi
- M(x0,x1,x) for n.model()
Assumptions:
M => psi
psi => phi & T
psi & M agree on which rules are taken.
M => phi & T
In other words,
1. psi is a weakening of M
2. phi & T is implied by psi
1. phi & T is implied by M
Goal is to find phi0(x0), phi1(x1) such that:
phi(x) & phi0(x0) & phi1(x1) => psi(x0, x1, x)
or at least (ignoring psi alltogether):
phi(x) & phi0(x0) & phi1(x1) => T(x0, x1, x)
Strategy:

20
lib/pdr_util.cpp
View file

@ -911,22 +911,9 @@ bool model_evaluator::check_model(ptr_vector<expr> const& formulas) {
template class rewriter_tpl<ite_hoister_cfg>;
class scoped_no_proof {
ast_manager& m;
proof_gen_mode m_mode;
public:
scoped_no_proof(ast_manager& m): m(m) {
m_mode = m.proof_mode();
m.toggle_proof_mode(PGM_DISABLED);
}
~scoped_no_proof() {
m.toggle_proof_mode(m_mode);
}
};
void hoist_non_bool_if(expr_ref& fml) {
ast_manager& m = fml.get_manager();
scoped_no_proof _sp(m);
datalog::scoped_no_proof _sp(m);
params_ref p;
ite_hoister_star ite_rw(m, p);
expr_ref tmp(m);
@ -951,7 +938,7 @@ bool model_evaluator::check_model(ptr_vector<expr> const& formulas) {
}
bool test_ineq(expr* e) const {
SASSERT(a.is_le(e) || a.is_ge(e));
SASSERT(a.is_le(e) || a.is_ge(e) || m.is_eq(e));
SASSERT(to_app(e)->get_num_args() == 2);
expr * lhs = to_app(e)->get_arg(0);
expr * rhs = to_app(e)->get_arg(1);
@ -985,6 +972,9 @@ bool model_evaluator::check_model(ptr_vector<expr> const& formulas) {
if (!a.is_int_real(lhs)) {
return true;
}
if (a.is_numeral(lhs) || a.is_numeral(rhs)) {
return test_ineq(e);
}
return test_term(lhs) && test_term(rhs);
}