LSV Seminar

The LSV seminar takes place on Tuesday at 11:00 AM. The usual location is the conference room at Pavillon des Jardins (venue). If you wish to be informed by e-mail about upcoming seminars, please contact Stéphane Le Roux and Matthias Fuegger.

The seminar is open to public and does not require any form of registration.

Past Seminars

Analyzing Timed Systems Using Tree Automata

 Paul Gastin
Tuesday, October 04 2016 at 11:00AM
Salle de Conférence (Pavillon des Jardins)
Paul Gastin (LSV)

Timed systems, such as timed automata, are usually analyzed using their operational semantics on timed words. The classical region abstraction for timed automata reduces them to (untimed) finite state automata with the same time-abstract properties, such as state reachability. We propose a new technique to analyze such timed systems. The main idea is to consider timed behaviors as graphs with matching edges capturing timing constraints. As an example, we develop the technique on timed pushdown systems. We show that their behaviors are graphs of bounded tree-width. Hence, they can be interpreted in trees opening the way to tree automata based techniques which are more powerful than analysis based on word automata. The technique is quite general and applies to many timed systems.

Joint work with S. Akshay and Shankar Narayanan Krishna from IIT Bombay, extended abstract at CONCUR'16.

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