Formal models and scripts: bulk-overload-precondition-matrix

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

• Multi-dimensional PointInSetQuery skips segments that contain matching points, because its segment early exit uses the lexicographically first and last set points as per-dimension bounds (finding LFV-475; repro · finding page)

Files

• pointinset-multidim-lexicographic-bounds-early-exit/model/early_exit_smt.py (used for LFV-475)

How to run

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

Snapshot of 2026-11-04. AI-assisted; not yet triaged by a human Lucene committer. Feedback: open an issue in lucene-ai-bug-hunt.