mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-23 17:15:31 +00:00
Code Activity

add missing simplification; handle nit #6952

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-10-25 09:59:54 -07:00
parent 0859be5649
commit 7b490543ca
2 changed files with 18 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/ast/rewriter/seq_rewriter.cpp
View file

@ -1245,6 +1245,15 @@ br_status seq_rewriter::mk_seq_extract(expr* a, expr* b, expr* c, expr_ref& resu
result = str().mk_substr(a1, m_autil.mk_add(b1, b), m_autil.mk_sub(c1, b));
return BR_REWRITE3;
}
rational r1, r2;
if (str().is_extract(a, a1, b1, c1) &&
m_autil.is_numeral(b1, r1) && r1.is_unsigned() &&
m_autil.is_numeral(c1, r2) && r2.is_unsigned() &&
constantPos && constantLen &&
r1 == 0 && r2 >= pos + len) {
result = str().mk_substr(a1, b, c);
return BR_REWRITE1;
}
if (str().is_extract(a, a1, b1, c1) &&
is_prefix(a1, b1, c1) && is_prefix(a, b, c)) {