mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2026-07-04 14:26:10 +00:00
Code Activity

Lookahead for regex splits applied to membership constraints

Browse source 
Rewriting constraint/prefix/suffix with constant strings to regexes
This commit is contained in:
CEisenhofer 2026-06-10 20:35:36 +02:00
parent f9f16550e0
commit 2dbefbcd56
7 changed files with 220 additions and 69 deletions
Download patch file Download diff file Expand all files Collapse all files

7
src/smt/seq/seq_nielsen.h
View file

@ -1316,6 +1316,13 @@ namespace seq {
// generalized regex factorization (Boolean closure derivation rule)
bool apply_regex_factorization(nielsen_node* node);
// Lookahead oracle for apply_regex_factorization's split() call: returns
// true iff the split's right component `n_regex` is prefix-compatible with
// the constant character sequence `c` (the tail of the factorization starts
// with c). Prunes splits whose tail-regex can never match c. Sound to
// apply during split generation (prefix-, not strict-, match).
bool split_lookahead_viable(expr* n_regex, zstring const& c);
// helper for apply_gpower_intr: fires the substitution.
// `fwd=true` uses left-to-right decomposition; `fwd=false` mirrors ZIPT's
// backward (right-to-left) direction.