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3709 commits

Author SHA1 Message Date
Nikolaj Bjorner
6d2321e6fe edits to seq_nielsen 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-30 17:36:27 -07:00
Nikolaj Bjorner
6d31bdcc21 use sk.mk_seq_eq to avoid disequality propagations 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-29 15:45:54 -07:00
CEisenhofer
dcc85cf9ef Bug in power elimination 2026-03-26 17:18:38 +01:00
CEisenhofer
3b5b53126e Bug fixing with unit replacement 2026-03-26 15:56:58 +01:00
Nikolaj Bjorner
6a6f9b1892 Merge remote-tracking branch 'origin/master' into c3 
# Conflicts:
#	.github/workflows/qf-s-benchmark.lock.yml
#	.github/workflows/qf-s-benchmark.md
#	.github/workflows/zipt-code-reviewer.lock.yml
#	.github/workflows/zipt-code-reviewer.md
#	.gitignore
#	src/ast/rewriter/seq_rewriter.cpp
#	src/test/main.cpp
 2026-03-24 17:44:48 -07:00
Nikolaj Bjorner
bc5818e12d fix bogus decompose_ite 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-24 14:43:56 -07:00
Nikolaj Bjorner
a5c0ecafda fixes to model generation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-24 13:27:28 -07:00
Nikolaj Bjorner
5803c6f202 fix bug in non-emptiness witness extraction 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-24 13:27:28 -07:00
Nikolaj Bjorner
dbdccbff97 use recursive function for not-contains 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-23 13:18:34 -07:00
Copilot
ced7952a7b
Implement not_contains_axiom in seq_axioms.cpp (#9098) 
* Implement not_contains_axiom in seq_axioms.cpp

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/2df315a7-6f41-4d22-9e77-1e778d97fdb8

* Rewrite not_contains_axiom using recfun recursive function instead of skolem predicate

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/28c9f40f-e66f-41b6-bec0-efff6bc9f902

* Use structural decomposition a = unit(nth(a,0)) ++ tail(a) in not_contains_axiom else-branch

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/e35f6eaa-4c4a-4629-bce2-c6a2a96e2ace

* Refactor tail_s initialization in seq_axioms.cpp

---------

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>
 2026-03-22 21:34:45 -07:00
Copilot
ad94dd1b7a
implement replace_all_axiom using recursive predicate ra(s,p,t,r) (#9095) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/c550da78-28c6-4ab4-9bfb-7403ecc3320b

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-22 18:44:29 -07:00
Nikolaj Bjorner
d1d050f69f not-contains placeholder 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-22 18:40:08 -07:00
Nikolaj Bjorner
00aac9a6a4 replace NYI by exceptions 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-22 16:07:48 -07:00
Nikolaj Bjorner
1863290b71 add deterministic solving for unit equations 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-22 15:34:16 -07:00
Copilot
6b5401ef68
Remove s_other from snode_kind; unify under s_var and is_var() (#9087) 
* remove s_other, use s_var and is_var() instead

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/d56594ed-7f7e-436a-a4b2-e6dc986b18a8

* fix build: add reset() override to test dummy solver stubs

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/d437376d-55d8-4087-baf1-e89451d2d597

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-22 12:05:24 -07:00
Nikolaj Bjorner
a39ff701c7 remove include of nielsen in sgraph 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-21 09:48:34 -07:00
Nikolaj Bjorner
ae12956545 updates based on discussion 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 11:20:29 -07:00
CEisenhofer
88ef8c7cda Another regex witness bug 2026-03-20 14:07:12 +01:00
CEisenhofer
737c5d44ed Simplify regex splits 2026-03-20 13:33:53 +01:00
CEisenhofer
9aaf103ca0 Fix union problem (might not solve all bugs) 2026-03-20 12:17:44 +01:00
CEisenhofer
4f884e7d9a Bug 2026-03-20 12:11:18 +01:00
CEisenhofer
a873d5cdda Fixed output error 2026-03-20 11:51:37 +01:00
Nikolaj Bjorner
1137d23725 fix bug reported in API coherence report 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-19 23:20:55 -07:00
Nikolaj Bjorner
0f4126f665 add filter for avoiding creating redundant disequality axioms 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-19 23:15:23 -07:00
Nikolaj Bjorner
a895548b99 cleanup 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-19 16:39:41 -07:00
Copilot
2ec305f206
port range regular expressions to snode from ZIPT (#9048) 
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-19 15:59:20 -07:00
Copilot
8795bf06fb
theory_nseq: dispatch assign_eh on all seq predicate cases via m_axioms, add enqueue/dequeue_axiom with variant prop_item (#9040) 
* dispatch assign_eh cases via m_axioms: add prefix/suffix/contains true axioms

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* fix build: remove stale snode_label_html declaration from seq_nielsen.h

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* theory_nseq: add enqueue/dequeue_axiom + std::variant prop_item + relevant_eh

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>
 2026-03-19 10:42:18 -07:00
CEisenhofer
109ab7d098 Fixed regex witness 2026-03-19 17:16:29 +01:00
CEisenhofer
9f4e823c8b ... and another one... 2026-03-19 15:44:15 +01:00
CEisenhofer
4271bdad55 Another minterm bug 2026-03-19 15:12:22 +01:00
CEisenhofer
149a087f65 Strengthened diseq axiom 2026-03-19 11:14:07 +01:00
Copilot
f837651434
seq_nielsen: replace mk_fresh_var() with mk_fresh_var(sort* s) (#9037) 
* replace mk_fresh_var() with mk_fresh_var(sort* s) in seq_nielsen; fix snode_label_html linkage

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* remove mk_var(symbol const&) from sgraph; update all callers to pass sort explicitly

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>
 2026-03-18 20:41:41 -07:00
Nikolaj Bjorner
a2352529f8 add diseq axiom 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-18 12:58:27 -07:00
CEisenhofer
e7431400b4 Regex bug fixes (still not there) 2026-03-18 18:01:44 +01:00
CEisenhofer
ab53889c10 Fixed couple of regex problems [there are still others] 2026-03-18 14:29:18 +01:00
CEisenhofer
39bf6af870 Missing file edits 2026-03-16 21:10:40 +01:00
CEisenhofer
e439504ec8 Delete cached substitutions completely (for now) to avoid dangling pointers after backtracking 2026-03-16 21:04:47 +01:00
Nikolaj Bjorner
32eedde897 disable rewrite that makes nseq solving harder 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-15 21:36:22 -07:00
Nikolaj Bjorner
a4c9a5b2b0 add review comments 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-15 12:23:17 -07:00
Copilot
2212f59704
seq_model: address NSB review comments (#8995) 
* Initial plan

* Address NSB review comments in seq_model.cpp

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Address code review feedback: improve null-sort handling in seq_model and some_seq_in_re

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>
 2026-03-14 21:55:32 -07:00
Nikolaj Bjorner
df9df50a71 update generation of empty sequence to take sort argument, fix mk_concat substitution 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-13 10:03:52 -07:00
copilot-swe-agent[bot]
56c88022e2 Fix build: use unquoted TRACE tag identifier instead of string literal 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-12 18:27:36 +00:00
copilot-swe-agent[bot]
c303b56f04 Add injectivity_simplifier and register injectivity2 tactic + injectivity simplifier 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-12 04:37:17 +00:00
copilot-swe-agent[bot]
2f8cc1536c Swap author order: Clemens Eisenhofer before Nikolaj Bjorner in file headers 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-10 16:27:26 +00:00
copilot-swe-agent[bot]
42eee12c2f Code simplifications in sls_euf_plugin.cpp and realclosure.cpp 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-10 16:17:24 +00:00
copilot-swe-agent[bot]
a6c94a1bfc Refactor sls_euf_plugin.cpp validate_model and add SASSERT in udoc_relation.cpp 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-09 16:57:59 +00:00
copilot-swe-agent[bot]
391febed3b Fix null pointer dereferences and uninitialized variables from discussion #8891 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-09 16:51:12 +00:00
copilot-swe-agent[bot]
822f19819c Remove unreachable return false in match_ubv2s1 
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-05 17:59:50 +00:00
CEisenhofer
608227a27e Fixed definition extension rule 2026-03-05 18:33:58 +01:00
CEisenhofer
7dcebcdb0a A bit cleanup 2026-03-05 17:14:54 +01:00