Justifying All Differences Using Pseudo-Boolean Reasoning
Aus International Center for Computational Logic
Justifying All Differences Using Pseudo-Boolean Reasoning
Vortrag von Stephan Gocht
- Veranstaltungsort: APB 2028
- Beginn: 17. Dezember 2019 um 15:00
- Ende: 17. Dezember 2019 um 16:00
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Constraint programming solvers support rich global constraints and propagators, which make them both powerful and hard to debug. In the Boolean satisfiability community, prooflogging is the standard solution for generating trustworthy outputs, and this has become key to the social acceptability of computer-generated proofs. However, reusing this technology for constraint programming requires either much weaker propagation, or an impractical blowup in proof length.
This paper demonstrates that simple, clean, and efficient proof logging is still possible for the all-different constraint, through pseudo-Boolean reasoning. We explain how such proofs can be expressed and verified mechanistically, describe an implementation, and discuss the broader implications for proof logging in constraint programming.
