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AutoModSAT demonstrates that LLM-guided heuristic discovery can significantly outperform traditional parameter-tuning methods, achieving up to 40% performance gains and notable speedups on complex SAT solvers. By combining modular solver design with unsupervised prompt optimization, this approach effectively bypasses the limitations of manually constrained search spaces in automatic configuration. The results suggest a promising new direction for optimizing intricate computational architectures without relying on human-defined constraints.
Source coveringarXiv

Discovering heuristics in a complex SAT solver with large language models

arXiv2 min read

arXiv:2507.22876v2 Announce Type: replace Abstract: The Satisfiability problem (SAT) is fundamental in computational complexity theory and has a wide range of industrial applications. Optimizing modern SAT solvers in real-world settings is quite challenging due to their intricate architectures. While automatic configuration frameworks have been developed, they rely on manually constrained search spaces. Here we develop AutoModSAT, a framework that uses large language models (LLMs) to automatically optimize SAT solvers. AutoModSAT combines an LLM-compatible modular solver design, unsupervised prompt optimization to diversify generated functions, and an efficient search procedure based on presearch strategy and a $(1+\lambda)$ evolutionary algorithm. Extensive experiments across a wide range of datasets demonstrate that AutoModSAT achieves $40\%$ performance improvement over the baseline solver and $30\%$ improvement over the state-of-the-art solvers. Moreover, AutoModSAT also attains a notable speedup compared to the parameter-tuned alternatives of the state-of-the-art solvers over most of the test datasets. These results demonstrate the potential of LLM-guided heuristic discovery for optimizing complex SAT solvers.

Abstract:The Satisfiability problem (SAT) is fundamental in computational complexity theory and has a wide range of industrial applications. Optimizing modern SAT solvers in real-world settings is quite challenging due to their intricate architectures. While automatic configuration frameworks have been developed, they rely on manually constrained search spaces. Here we develop AutoModSAT, a framework that uses large language models (LLMs) to automatically optimize SAT solvers. AutoModSAT combines an LLM-compatible modular solver design, unsupervised prompt optimization to diversify generated functions, and an efficient search procedure based on presearch strategy and a $(1+\lambda)$ evolutionary algorithm. Extensive experiments across a wide range of datasets demonstrate that AutoModSAT achieves $40\%$ performance improvement over the baseline solver and $30\%$ improvement over the state-of-the-art solvers. Moreover, AutoModSAT also attains a notable speedup compared to the parameter-tuned alternatives of the state-of-the-art solvers over most of the test datasets. These results demonstrate the potential of LLM-guided heuristic discovery for optimizing complex SAT solvers.

Artificial Intelligence (cs.AI); Logic in Computer Science (cs.LO)

arXiv:2507.22876 [cs.AI]

(or arXiv:2507.22876v2 [cs.AI] for this version)

https://doi.org/10.48550/arXiv.2507.22876 Focus to learn more arXiv-issued DOI via DataCite

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Full text under the publisher's open licence · 251 words

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