Exploration of Language Specifications by Compilation to First-order Logic
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Abstract
Exploration of language specifications helps to discover errors and inconsistencies early during the development of a programming language. We propose exploration of language specifications via application of existing automated first-order theorem provers (ATPs). To this end, we translate language specifications and exploration tasks to first-order logic, which many ATPs accept as input. However, there are several different strategies for compiling a language specification to first-order logic, and even small variations in the translation may have a large impact on the time it takes ATPs to find proofs.
In this paper, we present a systematic empirical study on how to best compile language specifications to first-order logic such that existing ATPs can solve typical exploration tasks efficiently. We have developed a compiler product line that implements 36 different compilation strategies and used it to feed language specifications to 4 existing first-order theorem provers. As a benchmark, we developed a language specification for typed SQL with 50 exploration goals. Our study empirically confirms that the choice of a compilation strategy in general greatly influences prover performance and shows which strategies are advantageous for prover performance.
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