Introduction to Formal Verification with SPARK — From Ada Contracts to Mathematical Proof (archived 2026-07-27)

A practical introduction to formal verification using the SPARK subset of Ada. Covers how to step up from contracts (Pre/Post) to proofs, using GNATprove, loop invariants, data-flow contracts, proof levels, and how to apply them to real projects. Archived version of https://comcomponent.com/en/blog/ada-spark-formal-verification/, as published on 2026-07-27. The live article is maintained and may change after this date. First published 2026-06-13.