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Level-Up - From Bits to Words

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Formal Methods: Foundations and Applications (SBMF 2022)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 13768))

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Abstract

Model checking based on SAT solving has been successfully applied to hardware and software verification. Most of the time the verification is done on the single bit-level using Boolean logic to represent operations on atomic data types.

With the extension of SAT solving to SMT solving, there exist solvers which can use more abstract reasoning on the word-level. SMT solvers support richer theories and allow for adding additional lemmas that can speed up verification.

In this paper we show how a combination of bit and word-level analysis can speed up the verification of hardware models specified on the word-level. We combine the analysis efficiency of SAT solvers to identify bit-level information that is added to the word-level model. Effectively we use different bit-level invariant generation to augment word-level models. We validate the approach on the HWMCC word-level benchmarks using different integration strategies and state-of-the-art model-checkers.

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Notes

  1. 1.

    http://fmv.jku.at/hwmcc20/.

  2. 2.

    http://fmv.jku.at/hwmcc20/hwmcc20benchmarks.tar.xz.

  3. 3.

    https://github.com/aman-goel/avr.

  4. 4.

    https://github.com/upscale-project/pono.

  5. 5.

    https://upscale.stanford.edu/.

  6. 6.

    https://github.com/boolector/btor2tools.

  7. 7.

    https://github.com/arbrad/IC3ref.

  8. 8.

    https://www.dropbox.com/s/ny9fu0va1bz2zls/extended_models.tar.xz?dl=0.

  9. 9.

    tag HWMCC of https://github.com/aman-goel/avr.

  10. 10.

    8b2a94649f5ea1161260a611de4b49e6f5d92b98 of https://github.com/upscale-project/pono.

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Authors and Affiliations

  1. University of Applied Sciences Munich HM, Lothstrasse 64, 80335, Munich, Germany

    Matthias Güdemann & Klaus Riedl

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  1. Matthias Güdemann
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  2. Klaus Riedl
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Correspondence to Matthias Güdemann .

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Editors and Affiliations

  1. Federal Rural University of Pernambuco, Recife, Brazil

    Lucas Lima

  2. Budapest University of Technology and Economics, Budapest, Hungary

    Vince Molnár

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Güdemann, M., Riedl, K. (2022). Level-Up - From Bits to Words. In: Lima, L., Molnár, V. (eds) Formal Methods: Foundations and Applications. SBMF 2022. Lecture Notes in Computer Science, vol 13768. Springer, Cham. https://doi.org/10.1007/978-3-031-22476-8_8

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