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QLTL Model-Checking

Authors François Laroussinie, Loriane Leclercq , Arnaud Sangnier

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Author Details

François Laroussinie
  • IRIF, Université Paris Cité, France
Loriane Leclercq
  • Ecole Centrale de Nantes, CNRS, LS2N, Nantes, France
Arnaud Sangnier
  • DIBRIS, Università di Genova, Italy

Funding

  • Leclercq, Loriane: ANR project ProMiS ANR-19-CE25-0015

Cite As Get BibTex

François Laroussinie, Loriane Leclercq, and Arnaud Sangnier. QLTL Model-Checking. In 32nd EACSL Annual Conference on Computer Science Logic (CSL 2024). Leibniz International Proceedings in Informatics (LIPIcs), Volume 288, pp. 35:1-35:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024) https://doi.org/10.4230/LIPIcs.CSL.2024.35

Abstract

Quantified LTL (QLTL) extends the temporal logic LTL with quantifications over atomic propositions. Several semantics exist to handle these quantifications, depending on the definition of executions over which formulas are interpreted: either infinite sequences of subsets of atomic propositions (aka the "tree semantics") or infinite sequences of control states combined with a labelling function that associates atomic propositions to the control states (aka the "structure semantics"). The main difference being that in the latter different occurrences of a control state should be labelled similarly. The tree semantics has been intensively studied from the complexity and expressivity point of view (especially in the work of Sistla [Sistla, 1983; Sistla et al., 1987]) for which the satisfiability and model-checking problems are known to be TOWER-complete. For the structure semantics, French has shown that the satisfiability problem is undecidable [French, 2003]. We study here the model-checking problem for QLTL under this semantics and prove that it is EXPSPACE-complete. We also show that the complexity drops down to PSPACE-complete for two specific cases of structures, namely path and flat ones.

Subject Classification

ACM Subject Classification
  • Theory of computation → Logic and verification
Keywords
  • Quantified Linear-time temporal logic
  • Model-cheking
  • Verification
  • Automata theory

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