[Release Notes] Release notes for version 4.17.0 - Additional Updates

[github-actions[bot]]

Additional Release Notes for Version 4.17.0

The RELEASE_NOTES.md file already has a Version 4.17.0 section, but there are substantial additional changes since February 20, 2026 that should be added to complete the release notes.

Analysis Summary

• Date range analyzed: February 20, 2026 - March 9, 2026
• Total commits in this period: 205 commits
• Substantial changes identified: 15+ user-facing improvements
• External contributions: 3 contributors (Angelica Moreira, Filipe Marques, Ruijie Fang)
• Maintainer improvements: Multiple API additions, bug fixes, and CI enhancements

---

Formatted Content to Add to RELEASE_NOTES.md

The following content should be inserted into the existing Version 4.17.0 section in RELEASE_NOTES.md, after the current entries but before "Version 4.16.0":

- Add ASan/UBSan memory safety CI workflow for continuous runtime safety checking. Thanks to Angelica Moreira.
  https://github.com/Z3Prover/z3/pull/8856
- Add missing API bindings across multiple languages:
  - Python: BvNand, BvNor, BvXnor operations, Optimize.translate()
  - Go: MkAsArray, MkRecFuncDecl, AddRecDef, Model.Translate, MkBVRotateLeft, MkBVRotateRight, MkRepeat, and 8 BV overflow/underflow check functions
  - TypeScript: Array.fromFunc, Model.translate
  - OCaml: Model.translate, mk_re_allchar (thanks to Filipe Marques, https://github.com/Z3Prover/z3/pull/8785)
  - Java: as-array method (thanks to Ruijie Fang, https://github.com/Z3Prover/z3/pull/8762)
- Fix #7507: simplify (>= product_of_consecutive_ints 0) to true
- Fix #7951: add cancellation checks to polynomial gcd_prs and HNF computation
- Fix #7677: treat FC_CONTINUE from check_nla as FEASIBLE in maximize
- Fix assertion violation in q_mbi diagnostic output
- Fix memory leaks in model_based_opt def ref-counting
- Fix NoSuchFieldError in JNI for BoolPtr: use Z field descriptor and SetBooleanField
- Fix TypeScript Array.fromFunc to use f.ptr instead of f.ast for Z3_func_decl type
- Fix intblast ubv_to_int bug: add bv2int axioms for compound expressions
- Fix static analysis findings: uninitialized variables, bitwise shift undefined behavior, and null pointer dereferences
- Convert bv1-blast and blast-term-ite tactics to also expose as simplifiers for more flexible integration
- Change default of param lws_subs_witness_disc to true for improved NLSAT performance. Thanks to Lev Nachmanson.

---

Notable Features in This Update

1. Memory Safety CI Workflow (External Contribution)

Angelica Moreira contributed a comprehensive CI workflow that runs AddressSanitizer (ASan) and UndefinedBehaviorSanitizer (UBSan) on every push, significantly improving code quality and safety.

2. API Completeness Improvements

Extensive work to achieve API parity across all language bindings (Python, Go, TypeScript, OCaml, Java), making Z3 more accessible and consistent across platforms.

3. Multiple Bug Fixes

Several critical bug fixes addressing issues #7507, #7951, and #7677, improving solver reliability and correctness.

4. External Contributions

• Angelica Moreira: Memory safety CI infrastructure
• Filipe Marques: OCaml API enhancement (mk_re_allchar)
• Ruijie Fang: Java API enhancement (as-array)

---

Instructions for Maintainers

To apply these updates to RELEASE_NOTES.md:

1. Open RELEASE_NOTES.md
2. Locate the Version 4.17.0 section (currently starts at line 4)
3. Find the last entry in that section (currently line 23: "- NLSAT optimizations...")
4. Insert the formatted content above after that line, before the "Version 4.16.0" header
5. Ensure consistent formatting with existing entries (dashes, indentation, links)
6. Review for any duplicate entries with existing content

The "Version 4.next" section at the top should remain unchanged - it's for planned future features.

---

Notes

• All changes are substantial and user-facing
• External contributions have been properly attributed
• PR links use full GitHub URL format consistent with existing style
• Bug fix issue numbers included where applicable
• Changes grouped by theme (API additions, bug fixes, etc.)

AI generated by Release Notes Updater

• expires on Mar 16, 2026, 8:43 PM UTC

[github-actions[bot]]

This discussion was automatically closed because it expired on 2026-03-16T20:43:48.412Z.

Closed by Workflow