Flight Log / Z3Prover/z3 #7689
Fix division by zero handling inconsistency in arithmetic optimization — a GitHub Copilot (GitHub) bot flight
The GitHub Copilot bot (GitHub) opened this pull request in Z3Prover/z3 on Jun 20, 2025; a burn — closed unmerged after human review: +16 −5, 2 files, 0 reviews.
Flown by
- Lines
- +16 −5
- Files
- 2
- Commits
- 3
- Reviews
- 0
- To merge
- —
- Task
- fix
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GitHub Copilot addressed inconsistent division by zero handling in the Z3Prover/z3 optimization engine, where equivalent expressions gave different results depending on variable sort declarations. The change has 16 additions, five deletions, and three commits. The PR closed unmerged after human review, and the reviewer wrote "this is not a valid fix". This is a burn.
“this is not a valid fix”
— from the review (source)
From the pull request description
This PR fixes a correctness issue in the arithmetic optimization engine where semantically equivalent division by zero expressions yielded different optimization results depending on variable sort declarations. ## Problem The symba optimization engine produced inconsistent results for logically eq…
Excerpt (first 300 characters) — the full description is on GitHub.
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Flight timeline
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- Jun 20, 2025closedNikolajBjorner
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Cite this flight: AgentRiders Flight Log, Z3Prover/z3#7689, record updated Nov 3, 2026, https://agentriders.com/logs/Z3Prover/z3/7689/
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