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add card operator to bapa

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-04-20 13:24:07 -07:00
parent aafb16e8ed
commit 7e2afca2c6
7 changed files with 70 additions and 20 deletions
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32
src/smt/theory_array_bapa.cpp
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@ -204,7 +204,7 @@ namespace smt {
return l_true;
}
lbool ensure_disjoint(app* sz1, app* sz2) {
bool ensure_disjoint(app* sz1, app* sz2) {
sz_info& i1 = *m_sizeof[sz1];
sz_info& i2 = *m_sizeof[sz2];
SASSERT(i1.m_is_leaf);
@ -214,16 +214,16 @@ namespace smt {
enode* r1 = get_root(s);
enode* r2 = get_root(t);
if (r1 == r2) {
return l_true;
return true;
}
if (!ctx().is_diseq(r1, r2) && ctx().assume_eq(r1, r2)) {
return l_false;
return false;
}
if (do_intersect(i1.m_selects, i2.m_selects)) {
add_disjoint(sz1, sz2);
return l_false;
return false;
}
return l_true;
return true;
}
bool do_intersect(obj_map<enode, expr*> const& s, obj_map<enode, expr*> const& t) const {
@ -436,6 +436,15 @@ namespace smt {
reset();
}
void internalize_term(app* term) {
if (th.is_set_has_size(term)) {
internalize_size(term);
}
else if (th.is_set_card(term)) {
internalize_card(term);
}
}
/**
* Size(S, n) => n >= 0, default(S) = false
*/
@ -458,6 +467,17 @@ namespace smt {
ctx().push_trail(remove_sz(m_sizeof, term));
}
/**
\brief whenever there is a cardinality function, it includes an axiom
that entails the set is finite.
*/
void internalize_card(app* term) {
SASSERT(ctx().e_internalized(term));
app_ref has_size(m_autil.mk_has_size(term->get_arg(0), term), m);
literal lit = mk_literal(has_size);
ctx().assign(lit, nullptr);
}
final_check_status final_check() {
lbool r = ensure_functional();
if (r == l_true) update_indices();
@ -494,7 +514,7 @@ namespace smt {
theory_array_bapa::~theory_array_bapa() { dealloc(m_imp); }
void theory_array_bapa::internalize_size(app* term) { m_imp->internalize_size(term); }
void theory_array_bapa::internalize_term(app* term) { m_imp->internalize_term(term); }
final_check_status theory_array_bapa::final_check() { return m_imp->final_check(); }