Hardness Results for Coverability Problem of Well-Structured Pushdown Systems

  • Chunmiao Li
  • Xiaojuan CaiEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10168)


Well-Structured Pushdown Systems (WSPDSs) are pushdown systems extended with states and stack alphabet to be vectors, for modeling (restricted) recursive concurrent programs. It has been considered to be “very close to the border of undecidability”. In this paper, we prove some hardness results for the coverability problem of WSPDSs. We show that for WSPDS with three dimensional vectors as states and WSPDS with three dimensional vectors as stack alphabet, the coverability problem becomes Ackermann-hard.


Automata and logic Coverability Lower bounds 



This research is partially supported by NSFC project 61472238, 61261130589, and 61511140100. The authors would like to thank Prof. Mizuhito Ogawa and anonymous reviewers for their helpful comments on the earlier version of this work.


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© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghaiChina

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