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Author SHA1 Message Date
Copilot
1c24c835c9
Fix three assertion violations in nseq string solver (#9106) 
- 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>
 2026-03-23 13:20:06 -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
Nikolaj Bjorner
4258768d77 reduce number of benchmarks to 200 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-23 03:03:59 -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
Nikolaj Bjorner
19827a8599 remove stale aw files 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-22 20:04:18 -07:00
Copilot
a320a98489
ZIPT benchmark: scale to 500 files, fix seq timeout to 5s (#9099) 
* Update ZIPT benchmark: 500 benchmarks, fix seq timeout description to 5s

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/4df0700d-bb5b-4bd6-85a4-34ed56c8f40c

* Update qf-s-benchmark.md

---------

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 19:58:23 -07:00
Copilot
8db175447b
Handle unit-unit prefix/suffix splits in simplify_and_init (#9097) 
When both leading (or trailing) tokens of a string equality are
is_char_or_unit(), split the equality:
  unit(a) ++ rest1 == unit(b) ++ rest2  ->  unit(a)==unit(b), rest1==rest2
  unit(a) ++ rest1 == unit(b)           ->  unit(a)==unit(b), rest1==empty
  unit(a) == unit(b) ++ rest2           ->  unit(a)==unit(b), empty==rest2
(symmetric suffix case handled too)

Add three unit tests covering prefix split, prefix split with empty
rest, and suffix split.


Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/565287e9-a121-4bae-8aa4-6c2ec93e660f

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 19:39:33 -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
7b27866310 simplify solution conditions 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-22 18:30:52 -07:00
Copilot
e0ca916e23
refactor: move nielsen graph display/to_dot routines into seq_nielsen_pp.cpp (#9090) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/c2457bcf-85f0-4ad7-9ff1-d394f4315698

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 17:44:22 -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
Copilot
40485e69be
Simplify extract_var_bound via operator normalization (#9062) 
* Initial plan

* simplify extract_var_bound in qe_lite_tactic.cpp via operator normalization

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

* Add defensive check for integer type in lhs

Added a defensive check for integer type in lhs before proceeding with inequality checks.

* Update qe_lite_tactic.cpp

* Fix utility function call for integer check

---------

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 16:01:12 -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
CEisenhofer
63830085b6 Delete unsupported testcases 2026-03-22 13:11:08 +01:00
Copilot
acd5a4cd59
Update README.md status badges: remove disabled specbot/deeptest, add new active workflows (#9081) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/77922efd-7471-4264-bf14-5fe5e643618d

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 2026-03-21 15:20:35 -07:00
Nikolaj Bjorner
aa210882c5 add review 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-21 10:14:34 -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
Lev Nachmanson
c2a17dac0b Update .github/workflows/ci.yml 
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
 2026-03-21 06:16:46 -10:00
Lev Nachmanson
b8736991f3 Update .github/workflows/ci.yml 
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
 2026-03-21 06:16:46 -10:00
Lev Nachmanson
748fbd96f2 Use -j$(nproc) instead of -j3 in CI make builds 
Replace hardcoded -j3 with -j$(nproc) in ci.yml, nightly.yml, and
release.yml to utilize all available cores on GitHub Actions runners.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-03-21 06:16:46 -10:00
Copilot
2ab53072e9
Implement ensure_digit_axiom in theory_nseq (#9075) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/9b679ca3-dba7-469c-907a-9abd5edf1e1d

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 19:46:22 -07:00
Copilot
f518faac9b
Add nseq issue drafts from Ostrich benchmark analysis (discussion #9071) (#9073) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/04321ea7-2a53-4ed5-9f43-816dc6f7476b

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 19:07:51 -07:00
Nikolaj Bjorner
ccdfdbb176 recompiled 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 16:32:44 -07:00
Nikolaj Bjorner
488c02711d updated workflows 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 16:32:25 -07:00
Nikolaj Bjorner
8ef491edea new instructions 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 14:59:59 -07:00
Copilot
8b7507c062
fix: forbid background ninja builds in ostrich-benchmark prompt to prevent OOM (exit 137) (#9069) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/919c0bc0-0f86-411e-aa7f-99ebf547eeb0

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 14:59:09 -07:00
Copilot
bb1c8ab230
Fix ostrich workflow OOM kill: use ninja -j1 to limit compilation memory (#9068) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/8c8cf73c-a94f-4bcf-b238-d35f8cdbb731

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 14:17:31 -07:00
Nikolaj Bjorner
35c400dd18 updated agentics 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 13:03:16 -07:00
Copilot
33dfce0507
Fix Ostrich Benchmark OOM kill: switch to Release build (#9066) 
* Initial plan

* Fix OOM kill in Ostrich Benchmark workflow: use Release instead of Debug build

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/3c146cc1-cdf8-4a25-90ad-31c366dbce40

---------

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 13:02:41 -07:00
Nikolaj Bjorner
0bfab0223a add ostrich benchmark markdown for agent to read in the c3 branch 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 11:33:36 -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
Copilot
4a8c9729bf
Add ostrich-benchmark agentic workflow for ZIPT/Z3 c3 branch benchmarking (#9064) 
Agent-Logs-Url: https://github.com/Z3Prover/z3/sessions/bfaec259-86d9-4b56-ab04-182835e3563b

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 11:19:37 -07:00
CEisenhofer
a99b93ef1f Added testcases 2026-03-20 18:40:55 +01:00
Lev Nachmanson
fc94e3dcdf remove a not successful workflow 
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
 2026-03-20 07:39:20 -10:00
Mark DenHoed
43009600d4
Fix documentation for Z3_solver_to_dimacs_string (#9053) 
Corrected the function name in the documentation comment.
 2026-03-20 10:18:13 -07:00
CEisenhofer
2bd5283f6a Assertions 2026-03-20 15:11:51 +01:00
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
5d912bdfa5 ... 2026-03-20 12:22:38 +01:00
CEisenhofer
fdb7f33552 ... one more 2026-03-20 12:20:16 +01:00
CEisenhofer
e3ed7f214b Removed debug lines 2026-03-20 12:19:53 +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
CEisenhofer
3662b89adc Missing range cases 2026-03-20 10:41:56 +01:00
Nikolaj Bjorner
d77e9d5c95 add code review comment 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2026-03-20 00:26:57 -07:00
Copilot
afe4bfcab2
chore: update RELEASE_NOTES.md for 4.17.0 per discussion #9023 (#9051) 
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
 2026-03-20 00:17:55 -07:00
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