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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_context.h
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@ -131,6 +131,7 @@ public:
bool has_pob() {return m_pob;}
pob_ref &get_pob() {return m_pob;}
inline unsigned weakness();
unsigned level () const {return m_lvl;}
void set_level (unsigned lvl) {m_lvl = lvl;}
@ -399,10 +400,15 @@ public:
datalog::rule const*& r,
vector<bool>& reach_pred_used,
unsigned& num_reuse_reach);
bool is_invariant(unsigned level, expr* lemma,
bool is_invariant(unsigned level, lemma* lem,
unsigned& solver_level, expr_ref_vector* core = nullptr);
bool is_invariant(unsigned level, expr* lem,
unsigned& solver_level, expr_ref_vector* core = nullptr)
{ UNREACHABLE();}
bool check_inductive(unsigned level, expr_ref_vector& state,
unsigned& assumes_level);
unsigned& assumes_level, unsigned weakness = UINT_MAX);
expr_ref get_formulas(unsigned level, bool add_axioms);
@ -549,7 +555,7 @@ struct pob_ref_gt :
{return gt (n1.get (), n2.get ());}
};
inline unsigned lemma::weakness() {return m_pob ? m_pob->weakness() : UINT_MAX;}
/**
*/
class derivation {
@ -774,6 +780,7 @@ public:
bool use_native_mbp () {return m_use_native_mbp;}
bool use_ground_cti () {return m_ground_cti;}
bool use_instantiate () { return m_instantiate; }
bool weak_abs() {return m_weak_abs;}
bool use_qlemmas () {return m_use_qlemmas; }
ast_manager& get_ast_manager() const { return m; }