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working axiomatization for CharAt

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This commit is contained in:
Murphy Berzish 2016-06-13 21:57:08 -04:00
parent 389845180c
commit be5cc02a45
3 changed files with 57 additions and 3 deletions
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7
src/smt/theory_str.h
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@ -106,6 +106,9 @@ namespace smt {
ptr_vector<enode> m_concat_axiom_todo;
ptr_vector<enode> m_string_constant_length_todo;
// enode lists for term-specific axioms
ptr_vector<enode> m_axiom_CharAt_todo;
int tmpStringVarCount;
int tmpXorVarCount;
int tmpLenTestVarCount;
@ -167,10 +170,14 @@ namespace smt {
bool is_string(enode const * n) const { return is_string(n->get_owner()); }
bool is_strlen(app const * a) const { return a->is_app_of(get_id(), OP_STRLEN); }
bool is_strlen(enode const * n) const { return is_strlen(n->get_owner()); }
bool is_CharAt(app const * a) const { return a->is_app_of(get_id(), OP_STR_CHARAT); }
bool is_CharAt(enode const * n) const { return is_CharAt(n->get_owner()); }
void instantiate_concat_axiom(enode * cat);
void instantiate_basic_string_axioms(enode * str);
void instantiate_str_eq_length_axiom(enode * lhs, enode * rhs);
void instantiate_axiom_CharAt(enode * e);
void set_up_axioms(expr * ex);
void handle_equality(expr * lhs, expr * rhs);