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Verifying concurrent programs by memory unwinding

Tomasco, Ermenegildo, Inverso, Omar, Fischer, Bernd, La Torre, Salvatore and Parlato, Gennaro (2015) Verifying concurrent programs by memory unwinding At 21st International Conference on Tools and Algorithms for the Construction and Analysis of Systems (TACAS), United Kingdom. 11 - 18 Apr 2015. 15 pp.

Record type: Conference or Workshop Item (Paper)

Abstract

We describe a new sequentialization-based approach to the symbolic verification of multi-threaded programs with shared memory and dynamic thread creation. Its main novelty is the idea of memory unwinding, i.e., an explicit representation of the sequence of write operations into the shared memory. For the verification, we nondeterministically guess this unwinding and then simulate the behavior of the program according to any scheduling that respects this guess. This approach is complementary to other sequentializations and explores an orthogonal dimension, i.e., the number of write operations. It also simplifies the implementation of several important optimizations, in particular the targeted exposure of individual writes. We implemented this approach as code-to-code transformation from multi-threaded into nondeterministic sequential programs, which allows the reuse of sequential verification tools. Experiments show that our approach is very promising: it found all errors in the concurrency category of SV-COMP15.

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More information

Published date: April 2015
Venue - Dates: 21st International Conference on Tools and Algorithms for the Construction and Analysis of Systems (TACAS), United Kingdom, 2015-04-11 - 2015-04-18
Organisations: Electronic & Software Systems

Identifiers

Local EPrints ID: 370322
URI: http://eprints.soton.ac.uk/id/eprint/370322
PURE UUID: 4c9cd012-4499-4664-9809-1f729a52cecc

Catalogue record

Date deposited: 21 Oct 2014 21:54
Last modified: 17 Jul 2017 21:51

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Contributors

Author: Ermenegildo Tomasco
Author: Omar Inverso
Author: Bernd Fischer
Author: Salvatore La Torre
Author: Gennaro Parlato

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