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fix #4054 (#4277)

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* flag when quantified lemmas are added to smt_context

* When solver returns unknown but cannot create child, return unknown

* handle unknowns when qlemmas and weak_abs are turned on
This commit is contained in:
Hari Govind V K 2020-05-21 12:58:09 -04:00 • committed by GitHub
parent bfd2407e0f
commit ed92b8437c
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4 changed files with 160 additions and 13 deletions
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8
src/muz/spacer/spacer_context.h
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@ -409,6 +409,7 @@ class pred_transformer {
stopwatch m_must_reachable_watch;
stopwatch m_ctp_watch;
stopwatch m_mbp_watch;
bool m_has_quantified_frame; // True when a quantified lemma is in the frame
void init_sig();
app_ref mk_extend_lit();
@ -441,6 +442,7 @@ public:
~pred_transformer() {}
inline bool use_native_mbp ();
bool mk_mdl_rf_consistent(const datalog::rule *r, model &mdl);
reach_fact *get_rf (expr *v) {
for (auto *rf : m_reach_facts) {
if (v == rf->get()) {return rf;}
@ -480,6 +482,9 @@ public:
reach_fact *get_used_rf(model& mdl, bool all = true);
/// \brief Returns reachability fact active in the origin of the given model
reach_fact* get_used_origin_rf(model &mdl, unsigned oidx);
/// \brief Collects all the reachable facts used in mdl
void get_all_used_rf(model &mdl, unsigned oidx, reach_fact_ref_vector& res);
void get_all_used_rf(model &mdl, reach_fact_ref_vector &res);
expr_ref get_origin_summary(model &mdl,
unsigned level, unsigned oidx, bool must,
const ptr_vector<app> **aux);
@ -1051,6 +1056,9 @@ class context {
void predecessor_eh();
void updt_params();
lbool handle_unknown(pob &n, const datalog::rule *r, model &model);
bool mk_mdl_rf_consistent(model &mdl);
public:
/**
Initial values of predicates are stored in corresponding relations in dctx.