3 results
Philippe Darondeau ; Stephane Demri ; Roland Meyer ; Christophe Morvan.
We investigate the decidability and complexity status of model-checking problems on unlabelled reachability graphs of Petri nets by considering first-order and modal languages without labels on transitions or atomic propositions on markings. We consider several parameters to separate decidable […]
Published on October 22, 2012
Stephane Demri ; Alexander Rabinovich.
We consider the temporal logic with since and until modalities. This temporal logic is expressively equivalent over the class of ordinals to first-order logic by Kamp's theorem. We show that it has a PSPACE-complete satisfiability problem over the class of ordinals. Among the consequences of our […]
Published on December 21, 2010
Bartosz Bednarczyk ; Stéphane Demri.
Adding propositional quantification to the modal logics K, T or S4 is known to lead to undecidability but CTL with propositional quantification under the tree semantics (tQCTL) admits a non-elementary Tower-complete satisfiability problem. We investigate the complexity of strict fragments of tQCTL […]
Published on July 28, 2022