mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-07-20 03:12:03 +00:00
Code Activity

updated rewrite rules to propagate nullability over nonground regexes (#4663)

Browse source 
* updated rewrite rules to propagate nullability over nonground regexes

* updated rewrite rules to propagate nullability over nonground regexes

* fixed incorrect rewrite status flag
This commit is contained in:
Margus Veanes 2020-08-26 00:26:17 -07:00 • committed by GitHub
parent ab10616b77
commit 78b88f761c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 43 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/ast/rewriter/seq_rewriter.h
View file

@ -193,6 +193,8 @@ class seq_rewriter {
expr_ref mk_der_cond(expr* cond, expr* ele, sort* seq_sort);
expr_ref mk_der_antimorov_union(expr* r1, expr* r2);
bool ite_bdds_compatabile(expr* a, expr* b);
/* if r has the form deriv(en..deriv(e1,to_re(s))..) returns 's = [e1..en]' else returns '() in r'*/
expr_ref is_nullable_symbolic_regex(expr* r, sort* seq_sort);
#ifdef Z3DEBUG
bool check_deriv_normal_form(expr* r, int level = 3);
#endif