Combining structural and symbolic methods for the verification of concurrent systems

The contributions during the last few years on the structural theory of Petri nets can now be applied to formal verification. The structural theory provides methods to find efficient encoding schemes for symbolic representations of the reachable markings. It also provides approximations of the state space that allow to alleviate many bottlenecks in the calculation of the reachability set by breadth or depth first search algorithms. The paper reviews some of the results on the structural theory and explains how they can be incorporated in a model-checking verification framework for concurrent systems.