Hourglass Automata

Yuki Osada
(The University of Western Australia)
Tim French
(The University of Western Australia)
Mark Reynolds
(The University of Western Australia)
Harry Smallbone
(The University of Western Australia)

In this paper, we define the class of hourglass automata, which are timed automata with bounded clocks that can be made to progress backwards as well as forwards at a constant rate. We then introduce a new clock update for timed automata that allows hourglass automata to be expressed. This allows us to show that language emptiness remains decidable with this update when the number of clocks is two or less. This is done by showing that we can construct a finite untimed graph using clock regions from any timed automaton that use this new update.

In Adriano Peron and Carla Piazza: Proceedings Fifth International Symposium on Games, Automata, Logics and Formal Verification (GandALF 2014), Verona, Italy, 10th - 12th September 2014, Electronic Proceedings in Theoretical Computer Science 161, pp. 175–188.
Published: 24th August 2014.

ArXived at: http://dx.doi.org/10.4204/EPTCS.161.16 bibtex PDF
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