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Published in:
2007 | OriginalPaper | Chapter
On Commutativity Based Edge Lean Search
Authors : Dragan Bošnački, Edith Elkind, Blaise Genest, Doron Peled
Published in: Automata, Languages and Programming
Publisher: Springer Berlin Heidelberg
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Exploring a graph through search is one of the most basic building blocks of various applications. In a setting with a huge state space, such as in testing and verification, optimizing the search may be crucial. We consider the problem of visiting all states in a graph where edges are generated by actions and the (reachable) states are not known in advance. Some of the actions may commute, i.e., they result in the same state for every order in which they are taken (this is the case when the actions are performed independently by different processes). We show how to use commutativity to achieve full coverage of the states while traversing considerably fewer edges.