relation: http://eprints.imtlucca.it/168/ title: Partial-order reduction and trail improvement in directed model checking creator: Edelkamp, Stefan creator: Leue, Stefan creator: Lluch-Lafuente, Alberto subject: QA75 Electronic computers. Computer science description: In this paper we present work on trail improvement and partial-order reduction in the context of directed explicit-state model checking. Directed explicit-state model checking employs directed heuristic search algorithms such as A* or best-first search to improve the error-detection capabilities of explicit-state model checking. We first present the use of directed explicit-state model checking to improve the length of already established error trails. Second, we show that partial-order reduction, which aims at reducing the size of the state space by exploiting the commutativity of concurrent transitions in asynchronous systems, can coexist well with directed explicit-state model checking. Finally, we illustrate how to mitigate the excessive length of error trails produced by partial-order reduction in explicit-state model checking. In this context we also propose a combination of heuristic search and partial-order reduction to improve the length to already provided counterexamples. publisher: Springer Berlin / Heidelberg date: 2004 type: Article type: PeerReviewed identifier: Edelkamp, Stefan and Leue, Stefan and Lluch-Lafuente, Alberto Partial-order reduction and trail improvement in directed model checking. International Journal on Software Tools for Technology Transfer (STTT), 6 (4). pp. 277-301. ISSN 1433-2779 (2004) relation: http://dx.doi.org/10.1007/s10009-004-0151-z relation: 10.1007/s10009-004-0151-z