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propagate weakness from pob down to all related checks

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If a pob was discharged with a weak solver, propagate the level of
weakness to inductive generalization and to lemma propagation.
This commit is contained in:
Arie Gurfinkel 2017-08-17 22:37:45 -04:00
parent b8b3703511
commit 68518b0e32
4 changed files with 53 additions and 24 deletions
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13
src/muz/spacer/spacer_generalizers.cpp
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@ -33,7 +33,8 @@ void lemma_sanity_checker::operator()(lemma_ref &lemma) {
expr_ref_vector cube(lemma->get_ast_manager());
cube.append(lemma->get_cube());
ENSURE(lemma->get_pob()->pt().check_inductive(lemma->level(),
cube, uses_level));
cube, uses_level,
lemma->weakness()));
}
@ -58,6 +59,8 @@ void lemma_bool_inductive_generalizer::operator()(lemma_ref &lemma) {
ptr_vector<expr> processed;
expr_ref_vector extra_lits(m);
unsigned weakness = lemma->weakness();
unsigned i = 0, num_failures = 0;
while (i < cube.size() &&
(!m_failure_limit || num_failures < m_failure_limit)) {
@ -65,7 +68,7 @@ void lemma_bool_inductive_generalizer::operator()(lemma_ref &lemma) {
lit = cube.get(i);
cube[i] = true_expr;
if (cube.size() > 1 &&
pt.check_inductive(lemma->level(), cube, uses_level)) {
pt.check_inductive(lemma->level(), cube, uses_level, weakness)) {
num_failures = 0;
dirty = true;
for (i = 0; i < cube.size() &&
@ -82,7 +85,7 @@ void lemma_bool_inductive_generalizer::operator()(lemma_ref &lemma) {
SASSERT(extra_lits.size() > 1);
for (unsigned j = 0, sz = extra_lits.size(); !found && j < sz; ++j) {
cube[i] = extra_lits.get(j);
if (pt.check_inductive(lemma->level(), cube, uses_level)) {
if (pt.check_inductive(lemma->level(), cube, uses_level, weakness)) {
num_failures = 0;
dirty = true;
found = true;
@ -185,6 +188,8 @@ void lemma_array_eq_generalizer::operator() (lemma_ref &lemma)
manager &pm = m_ctx.get_manager();
(void)pm;
unsigned weakness = lemma->weakness();
expr_ref_vector core(m);
expr_ref v(m);
func_decl_set symb;
@ -264,7 +269,7 @@ void lemma_array_eq_generalizer::operator() (lemma_ref &lemma)
pred_transformer &pt = lemma->get_pob()->pt();
// -- check if it is consistent with the transition relation
unsigned uses_level1;
if (pt.check_inductive(lemma->level(), lits, uses_level1)) {
if (pt.check_inductive(lemma->level(), lits, uses_level1, weakness)) {
TRACE("core_array_eq", tout << "Inductive!\n";);
lemma->update_cube(lemma->get_pob(),lits);
lemma->set_level(uses_level1);