LTL translation improvements in Spot 1.0 Online publication date: Sun, 02-Mar-2014
by Alexandre Duret-Lutz
International Journal of Critical Computer-Based Systems (IJCCBS), Vol. 5, No. 1/2, 2014
Abstract: Spot is a library of model-checking algorithms started in 2003. This paper focuses on its module for translating linear-time temporal logic (LTL) formulas into Büchi automata: one of the steps required in the automata-theoretic approach to LTL model-checking. We detail the different algorithms involved in this translation: the core translation itself, which performs many simplifications thanks to its use of binary decision diagrams; the pre-processing of the LTL formulas with rewriting rules chosen to help their translation; and various post-processing algorithms whose use depends on the intent of the translation: do we favour deterministic automata, or small automata? Using different benchmarks, we show how Spot competes with other LTL translators, and how it has improved over the years.
Online publication date: Sun, 02-Mar-2014
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