- seq_model.cpp: skip trivial memberships in collect_var_regex_constraints;
SAT leaf nodes can have "" in nullable_regex (trivial) in addition to
primitive (single-variable) memberships after Brzozowski derivative
consumption reduces a concrete string membership to empty.
- seq_nielsen.cpp: fix SASSERT(!var) typo in var_ub(); should be SASSERT(var)
matching the pattern in var_lb().
- seq_regex.cpp: replace VERIFY(re_expr) with null guard in
minterm_to_char_set(); nullptr means no regex constraint and should
return the full alphabet, as the test test_minterm_nullptr_is_full expects.
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/31db5346-9b60-4a20-a101-beca9fc9e4f8
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
* Initial plan
* build verified: nseq_regex moved to smt/seq
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
* rename nseq_regex/state/model to seq_regex/state/model in smt/seq; add Clemens Eisenhofer as co-author
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
* seq_model: remove theory_nseq dependency; get family_id from seq_util
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
* Add comments for regex enhancements in seq_model
Added comments regarding future improvements for regex handling.
* Add comments for large exponent handling
Add comments for handling large exponents in seq_model.cpp
* Revise comments for clarity on sort usage
Updated comments to reflect review suggestions regarding the use of the sort of 'n'.
* seq_state: remove sgraph dep; seq_model: use snode sort for is_empty; remove NSB review comments
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
* Update seq_state.h
* Remove unnecessary include for smt_context.h
* move seq_model from smt/seq/ to smt/; fix seq_state.h add_str_mem typo
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Co-authored-by: Nikolaj Bjorner <nbjorner@microsoft.com>
