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Fix lemma_as_cti option

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Use negation of a lemma as a proof obligation. This speeds up discovering
bad lemmas that do not contain some reachable states.
This commit is contained in:
Arie Gurfinkel 2018-06-27 14:34:29 -04:00
parent bc6604441b
commit 49e9480928
2 changed files with 56 additions and 24 deletions
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21
src/muz/spacer/spacer_context.h
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@ -122,13 +122,14 @@ class lemma {
expr_ref_vector m_cube;
app_ref_vector m_zks;
app_ref_vector m_bindings;
pob_ref m_pob;
model_ref m_ctp; // counter-example to pushing
unsigned m_lvl; // current level of the lemma
unsigned m_init_lvl; // level at which lemma was created
pob_ref m_pob;
model_ref m_ctp; // counter-example to pushing
bool m_external;
unsigned m_bumped;
unsigned m_weakness;
unsigned m_bumped:16;
unsigned m_weakness:16;
unsigned m_external:1;
unsigned m_blocked:1;
void mk_expr_core();
void mk_cube_core();
@ -159,8 +160,11 @@ public:
void add_skolem(app *zk, app* b);
inline void set_external(bool ext){m_external = ext;}
inline bool external() { return m_external;}
void set_external(bool ext){m_external = ext;}
bool external() { return m_external;}
bool is_blocked() {return m_blocked;}
void set_blocked(bool v) {m_blocked=v;}
bool is_inductive() const {return is_infty_level(m_lvl);}
unsigned level () const {return m_lvl;}
@ -496,6 +500,9 @@ public:
expr *post, app_ref_vector const &b){
return m_pobs.mk_pob(parent, level, depth, post, b);
}
pob* find_pob(pob *parent, expr *post) {
return m_pobs.find_pob(parent, post);
}
pob* mk_pob(pob *parent, unsigned level, unsigned depth,
expr *post) {