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Adjacent Ordered Multi-Pushdown Systems
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Systems.
2014 (English)In: International Journal of Foundations of Computer Science, ISSN 0129-0541, Vol. 25, no 8, 1083-1096 p.Article in journal (Refereed) Published
Abstract [en]

Multi-pushdown systems are formal models of multi-threaded programs. As they are Turing powerful in their full generality, several decidable subclasses, constituting under-approximations of the original system, have been studied in the recent years. Ordered Multi-Pushdown Systems (OMPDSs) impose an order on the stacks and limit pop actions to the lowest non-empty stack. The control state reachability for OMPDSs is 2-ETIME-COMPLETE. We propose a restriction on OMPDSs, called Adjacent OMPDSs (AOMPDS), where values may be pushed only on the lowest non-empty stack or one of its two neighbours. We describe EXPTIME decision procedures for reachability and LTL model-checking and establish matching lower bounds. We demonstrate the utility of this model as an algorithmic tool via optimal reductions from other models.

Place, publisher, year, edition, pages
2014. Vol. 25, no 8, 1083-1096 p.
Keyword [en]
Concurrent pushdown systems, reachability problem, LTL model-checking, recursive Boolean programs
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:uu:diva-248656DOI: 10.1142/S0129054114400255ISI: 000350333300011OAI: oai:DiVA.org:uu-248656DiVA: diva2:802277
Available from: 2015-04-12 Created: 2015-04-06 Last updated: 2017-12-04Bibliographically approved

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Atig, Mohamed Faouzi

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