Inherent vacuity for GR(1) specifications

Shahar Maoz, Rafi Shalom

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Vacuity is a well-known quality issue in formal specifications, studied mostly in the context of model checking. Inherent vacuity is a type of vacuity that applies to specifications, without the context of a model. GR(1) is an expressive assume-guarantee fragment of LTL, which enables efficient symbolic synthesis. In this work we investigate inherent vacuity for GR(1) specifications. We define several general types of inherent vacuity for GR(1), including specification element vacuity and domain value vacuity. We detect vacuities using a reduction to LTL satisfiability, specialized for the context of GR(1). We further extend vacuity detection to handle GR(1) specifications that are enriched with past LTL, monitors, and patterns. Finally, we define a novel notion of vacuity core, which provides means to localize the cause of vacuity. We implemented our work and evaluated it on benchmarks from the literature. The evaluation shows that vacuities are indeed common in GR(1) specifications, and that we are able to efficiently detect them and effectively localize their causes. Moreover, our evaluation shows that removal of vacuous specification elements may significantly reduce synthesis time.

Original languageEnglish
Title of host publicationESEC/FSE 2020 - Proceedings of the 28th ACM Joint Meeting European Software Engineering Conference and Symposium on the Foundations of Software Engineering
EditorsPrem Devanbu, Myra Cohen, Thomas Zimmermann
PublisherAssociation for Computing Machinery, Inc
Pages99-110
Number of pages12
ISBN (Electronic)9781450370431
DOIs
StatePublished - 8 Nov 2020
Event28th ACM Joint Meeting European Software Engineering Conference and Symposium on the Foundations of Software Engineering, ESEC/FSE 2020 - Virtual, Online, United States
Duration: 8 Nov 202013 Nov 2020

Publication series

NameESEC/FSE 2020 - Proceedings of the 28th ACM Joint Meeting European Software Engineering Conference and Symposium on the Foundations of Software Engineering

Conference

Conference28th ACM Joint Meeting European Software Engineering Conference and Symposium on the Foundations of Software Engineering, ESEC/FSE 2020
Country/TerritoryUnited States
CityVirtual, Online
Period8/11/2013/11/20

Keywords

  • GR(1)
  • Reactive synthesis
  • Vacuity

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