Flight Log / Z3Prover/z3 #7737
Fix quantifier weight default to prevent performance regression — a GitHub Copilot (GitHub) bot flight
The GitHub Copilot bot (GitHub) opened this pull request in Z3Prover/z3 on Jul 15, 2025; a burn — closed unmerged after human review: +20 −3, 3 files, 0 reviews.
Flown by
- Lines
- +20 −3
- Files
- 3
- Commits
- 3
- Reviews
- 0
- To merge
- —
- Task
- fix
Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.
GitHub Copilot, working on Z3Prover/z3, takes on a fix task: correcting the default quantifier weight to address a memory and time regression on quantifier-heavy SMT files. The change spans three files and three commits, adding 20 lines and removing three. The pull request closed unmerged after human review, a burn.
“Z3 4.12.6 also proves this file efficiently.”
— from the review (source)
From the pull request description
This PR fixes a critical performance regression in Z3 4.15.x where quantifier-heavy SMT files experience memory and time blowup compared to Z3 4.8.17. ## Problem The issue was caused by the "Weight 0" performance bug documented in `src/params/qi_params.h`. When quantifiers have default weight 0: 1…
Excerpt (first 300 characters) — the full description is on GitHub.
View the pull request on GitHub →
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Flight timeline
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- Jul 26, 2025closedNikolajBjorner
Read next
Cite this flight: AgentRiders Flight Log, Z3Prover/z3#7737, record updated Nov 3, 2026, https://agentriders.com/logs/Z3Prover/z3/7737/
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