Formal models and scripts: timeout-partial-results

Tools: Python

These are the working models and scripts this part of the hunt used. Some encode the code as it is (a counterexample is the expected result), others a fixed or correct variant; read the header comment of each file. Paths inside them were replaced by placeholders such as $LUCENE (a Lucene checkout) and $WORK.

Findings

• IndexSearcher#count on a two-term disjunction over-counts, even above maxDoc, when the searcher timeout fires while the intersection is counted (finding LFV-465; repro · finding page)

Files

• count-inclusion-exclusion-partial-intersection/model/count_ie_timeout_z3.py (used for LFV-465)

How to run

• Python: python3 <file>.py; scripts that import z3 need the z3-solver package.

Snapshot of 2026-11-03. AI-assisted; not yet triaged by a human Lucene committer. Feedback: open an issue in lucene-ai-bug-hunt.