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DPvis – a tool to visualize the structure of SAT instances. (English) Zbl 1128.68484
Bacchus, Fahiem (ed.) et al., Theory and applications of satisfiability testing. 8th international conference, SAT 2005, St Andrews, UK, June 19–23, 2005. Proceedings. Berlin: Springer (ISBN 3-540-26276-8/pbk). Lecture Notes in Computer Science 3569, 257-268 (2005).
Summary: We present DPvis, a Java tool to visualize the structure of SAT instances and runs of the DPLL (Davis-Putnam-Logemann-Loveland) procedure. DPvis uses advanced graph layout algorithms to display the problem’s internal structure arising from its variable dependency (interaction) graph. DPvis is also able to generate animations showing the dynamic change of a problem’s structure during a typical DPLL run. Besides implementing a simple variant of the DPLL algorithm on its own, DPvis also features an interface to MiniSAT, a state-of-the-art DPLL implementation. Using this interface, runs of MiniSAT can be visualized – including the generated search tree and the effects of clause learning. DPvis is supposed to help in teaching the DPLL algorithm and in gaining new insights in the structure (and hardness) of SAT instances.
For the entire collection see [Zbl 1077.68002].

MSC:
68T20 Problem solving in the context of artificial intelligence (heuristics, search strategies, etc.)
Software:
DPvis; MiniSat
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