作者: Witold Charatonik , Piotr Witkowski
DOI: 10.1007/978-3-642-16242-8_14
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摘要: The Bernays-Schonfinkel class with Datalog is a 2-variable fragment of the extended least fixed points expressible by certain monadic programs. It was used in bounded model checking procedure for programs manipulating dynamically allocated pointer structures, where problem reduced to satisfiability formulas this logic. best known upper bound on complexity logic 2NEXPTIME. In paper we extend more expressive -- two-variable counting quantifiers same kind points. We prove that both and entailment new are decidable NEXPTIME give matching lower original logic, which establishes NEXPTIME-completeness problems them. Our algorithm based translation quantifiers.