%0 Conference Proceedings %F morvan11a %A Darondeau, Ph. %A Demri, S. %A Meyer, R. %A Morvan, Ch. %T {Petri Net Reachability Graphs: Decidability Status of FO Properties} %B IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2011) %V 13 %P 140-151 %S Leibniz International Proceedings in Informatics (LIPIcs) %I Schloss Dagstuhl-Leibniz-Zentrum fuer Informatik %C Bombay, India %X We investigate the decidability and complexity status of model-checking problems on unlabelled reachability graphs of Petri nets by considering first-order, modal and pattern-based languages without labels on transitions or atomic propositions on markings. We consider several parameters to separate decidable problems from undecidable ones. Not only are we able to provide precise borders and a systematic analysis, but we also demonstrate the robustness of our proof techniques %U http://drops.dagstuhl.de/opus/volltexte/2011/3356 %U http://dx.doi.org/10.4230/LIPIcs.FSTTCS.2011.140 %D 2011