Verifying Datalog Reasoning with Lean
Aus International Center for Computational Logic
Verifying Datalog Reasoning with Lean
Vortrag von Lukas Gerlach
- Veranstaltungsort: APB-2026
- Beginn: 23. Oktober 2025 um 11:00
- Ende: 23. Oktober 2025 um 12:00
- Forschungsgruppe: Wissensbasierte Systeme
- Event series: Research Seminar Logic and AI
- iCal
Datalog is an essential logical rule language with many applications, and modern rule engines compute logical consequences for Datalog with high performance and scalability. While Datalog is rather simple and, in principle, explainable by design, such sophisticated implementations and optimizations are hard to verify. We therefore propose a certificate-based approach to validate results of Datalog reasoners in a formally verified checker for Datalog proofs. Using the proof assistant Lean, we implement such a checker and verify its correctness against direct formalizations of the Datalog semantics. We propose two JSON encodings for Datalog proofs: one using the widely supported Datalog proof trees, and one using directed acyclic graphs for succinctness. To evaluate the practical feasibility and performance of our approach, we validate proofs that we obtain by converting derivation traces of an existing Datalog reasoner into our tool-independent format.
