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

Modal Interface Automata

 Walter Vogler
Wednesday, December 12 2012 at 11:00AM
Salle de Conférence (Pavillon des Jardins)
Walter Vogler (Institut für Informatik, University Augsburg)

De Alfaro and Henzinger's Interface Automata (IA) and Nyman et al.'s recent combination IOMTS of IA and Larsen's Modal Transition Systems (MTS) are established frameworks for specifying interfaces of system components. However, neither IA nor IOMTS consider conjunction that is needed in practice when a component satisfies multiple interfaces, while Larsen's MTS-conjunction is not closed. In addition, IOMTS-parallel composition exhibits a compositionality defect.

In our work, we define conjunction (and also disjunction) on IA and MTS and prove the operators to be `correct', i.e., the greatest lower bounds (least upper bounds) with respect to IA- and respectively MTS-refinement. As its main contribution, a novel interface theory called Modal Interface Automata (MIA) is introduced: MIA is a rich subset of IOMTS, is equipped with compositional parallel, conjunction and disjunction operators, and allows a simpler embedding of IA than Nyman's. Thus, it fixes the shortcomings of related work, without restricting designers to deterministic interfaces as Raclet et al.'s modal interface theory does.

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