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Thu 12 Nov 2020 08:33 - 08:34 at Virtual room 1 - Analysis 4

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.

Thu 12 Nov

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08:30 - 09:00
08:30
2m
Talk
Domain-Independent Interprocedural Program Analysis using Block-Abstraction Memoization
Research Papers
Dirk Beyer LMU Munich, Germany, Karlheinz Friedberger LMU Munich, Germany
DOI Pre-print Media Attached
08:33
1m
Talk
Inherent Vacuity for GR(1) Specifications
Research Papers
Shahar Maoz Tel Aviv University, Israel, Rafi Shalom Tel Aviv University, Israel
DOI
08:35
1m
Talk
Interval Counterexamples for Loop Invariant Learning
Research Papers
Rongchen Xu Tsinghua University, China, Fei He Tsinghua University, Bow-Yaw Wang Academia Sinica
DOI
08:37
1m
Talk
Modular Collaborative Program Analysis in OPAL
Research Papers
Dominik Helm TU Darmstadt, Germany, Florian K├╝bler TU Darmstadt, Germany, Michael Reif TU Darmstadt, Germany, Michael Eichberg TU Darmstadt, Germany, Mira Mezini TU Darmstadt, Germany
DOI
08:39
1m
Talk
Past-Sensitive Pointer Analysis for Symbolic Execution
Research Papers
David Trabish Tel Aviv University, Israel, Timotej Kapus Imperial College London, UK, Noam Rinetzky Tel Aviv University, Cristian Cadar Imperial College London, UK
DOI Pre-print Media Attached
08:41
19m
Talk
Conversations on Analysis 4
Paper Presentations
David Trabish Tel Aviv University, Israel, Dominik Helm TU Darmstadt, Germany, Rafi Shalom Tel Aviv University, Israel, Rongchen Xu Tsinghua University, China, Shahar Maoz Tel Aviv University, Israel, M: Rachel Tzoref-Brill IBM Research