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arXiv · 2001.09705

Layered Clause Selection for Theory Reasoning

Bernhard Gleiss·Martin Suda
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Abstract

Explicit theory axioms are added by a saturation-based theorem prover as one of the techniques for supporting theory reasoning. While simple and effective, adding theory axioms can also pollute the search space with many irrelevant consequences. As a result, the prover often gets lost in parts of the search space where the chance to find a proof is low. In this paper we describe a new strategy for controlling the amount of reasoning with explicit theory axioms. The strategy refines a recently proposed two-layer-queue clause selection and combines it with a heuristical measure of the amount of theory reasoning in the derivation of a clause. We implemented the new strategy in the automatic theorem prover Vampire and present an evaluation showing that our work dramatically improves the state-of-the-art clause-selection strategy in the presence of theory axioms.

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Bernhard Gleiss, Martin Suda. 2020-01-27. Layered Clause Selection for Theory Reasoning. https://arxiv.org/abs/2001.09705

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