# Z3Prover/z3

> Z3 is an open-source SMT solver (theorem prover) from Microsoft Research that checks satisfiability of logical formulas and proves theorems. It is used for formal verification, symbolic execution, and optimization problems.

- Magnitude: 1.0 out of 10 — Steady
- Stars: 12,873 total · +3 stars measured 2026-11-02, 00:16–23:13 UTC
- Star trust: star growth looks organic
- Category: Developer tools · Language: C++ · Created: 2015-03-26 · Last push: 2026-11-02
- GitHub: https://github.com/Z3Prover/z3 · Page: https://gitnova.dev/en/r/Z3Prover/z3

## Useful for

- Verify algorithm correctness through formal verification of conditions
- Solve a scheduling or planning problem encoded as an SMT formula
- Embed the solver into your tool via C++, Python, or .NET bindings

## Why it’s here

- Star-counter measurements on 2026-11-02 (UTC), 00:16–23:13: 12870 → 12873 stars (+3). This is the change over that interval.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 1,722
- Issues and pull requests: 10,195
- Watchers: 171
- Average over the last week: 5 per day
- Usual pace: 5 per day
- Stars in the last hour (measured): 0
- Latest release: Nightly (2026-11-02)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-10-04 … 2026-11-02: 4, 2, 1, 4, 7, 9, 0, 0, 9, 4, 2, 4, 2, 3, 4, 6, 6, 3, 7, 9, 7, 9, 8, 10, 5, 5, 5, 2, 5, 3

## Magnitude by day, last 14 days

09-26 1.0, 09-27 0.9, 09-28 1.0, 09-29 1.0, 10-24 1.6, 10-25 1.8, 10-26 2.0, 10-27 2.0, 10-28 1.8, 10-29 1.7, 10-30 1.5, 10-31 1.4, 11-01 0.9, 11-02 1.2

## Similar by description

1. **google/or-tools** — 1.5 · Steady · Science & research · C++ · +8 stars measured 2026-11-02, 00:16–23:11 UTC
   Open-source suite by Google for solving combinatorial optimization problems: constraint programming, linear programming, routing and graph algorithms. Includes C++ core with Python, C# and Java wrappers.
   Full card: https://gitnova.dev/en/r/google/or-tools.md

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-11-02 23:16 UTC, updated every 30 minutes.