Xiaojuan Cai (SJTU) Title: The Reachability/Coverability Problems of VAS - a survey Abstract: We survey 40 years (1976 - 2015) of research on reachabliity/coverability of VAS and its variants. We collect results on the decidability proofs and complexity lower/upper bounds. We also investigate the proof techniques that lead to some of these important results. This survey is based on the discussions in weekly seminars of BASICS lab.