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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/13503

Title: Termination and Boundedness for Well-Structured Pushdown Systems
Authors: Lei, Suhua
Cai, Xiaojuan
Ogawa, Mizuhito
Issue Date: 2016-05-17
Publisher: 北陸先端科学技術大学院大学先端科学技術研究科情報科学系
Magazine name: Research report (School of Information Science, Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology)
Volume: IS-RR-2016-001
Start page: 1
End page: 25
Abstract: Well-structured pushdown systems (WSPDSs) extend pushdown systems with well-quasi-ordered (possibly in_nitely many) states and stack alphabet. As an expressive model for concurrent recursive computations, WSPDSs are believed to “be close the border of undecidability” [11]. Most of the decidability results are known only on subclasses. In this paper, we investigate the decidability of the termination and boundedness problems for WSPDSs using two algorithms: One is an extension of the reduced reachability tree technique proposed by Leroux et. al. in [11]. The other is based on Post^*-automata technique which has been successfully applied in the model checking of pushdown systems. The complexity of both are Hyper-Ackermannian for bounded WSPDSs. We implement both algorithms and make experiments on a large number of randomly generated WSPDSs. The results illustrate that the Post^*_automata based algorithm sometimes behaves an order of magnitude faster.
URI: http://hdl.handle.net/10119/13503
Material Type: publisher
Appears in Collections:IS-RR-2016

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