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LTL Model Checking of Parametric Timed Automata

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Abstract:

The parameter synthesis problem for timed automata is undecidable in general even for very simple reachability properties. In this paper we introduce restrictions on parameter valuations under which the parameter synthesis problem is decidable for LTL properties. The proposed problem could be solved using an explicit enumeration of all possible parameter valuations. However, we introduce a symbolic zone-based method for synthesising bounded integer parameters of parametric timed automata with an LTL specification. Our method extends the ideas of the standard automata-based approach to LTL model checking of timed automata. Our solution employs constrained parametric difference bound matrices and a suitable notion of extrapolation.

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