Department of Information Technology

An Integrated Specification and Verification Technique for Highly Concurrent Data Structures

Date and Time

Thursday, May 23rd, 2013 at 10:30.

Location

Polacksbacken, room 1145

Abstract

We present a technique for automatically verifying safety properties of concurrent programs, in particular programs which rely on subtle dependencies of local states of different threads, such as lock-free implementations of stacks and queues in an environment without garbage collection. Our technique addresses the joint challenges of infinite-state specifications, an unbounded number of threads, and an unbounded heap managed by explicit memory allocation. Our technique builds on the automata-theoretic approach to model checking, in which a specification is given by an automaton that observes the execution of a program and accepts executions that violate the intended specification. We extend this approach by allowing specifications to be given by a class of infinite-state automata. We show how such automata can be used to specify queues, stacks, and other data structures, by extending a data-independence argument. For verification, we develop a shape analysis, which tracks correlations between pairs of threads, and a novel abstraction to make the analysis practical. We have implemented our method and used it to verify programs, some of which have not been verified by any other automatic method before.

Nota Bene

This presentation was given at TACAS'13 as part of the ETAPS joint conferences in Rome, Italy.
This article received the EASST Best Paper Award.

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Updated  2013-04-22 13:26:56 by Frédéric Haziza.