Formal models and scripts: boolean-rewrite-dispatch

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

• BM25Similarity/StableTflSimilarity k3 query-term saturation is skipped for duplicate SHOULD clauses when 2 <= minimumNumberShouldMatch < number of SHOULD clauses (finding LFV-103; repro · finding page)

Files

• k3-saturation-skipped-when-msm-ge-2/model/k3_dedup_z3.py (used for LFV-103)
• k3-saturation-skipped-when-msm-ge-2/model/rewrite_rules_z3.py (used for LFV-103)

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.