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Cyber-Physical Systems (CPS) tightly integrate cyber and physical components and transcend discrete and continuous domains. It is greatly desired that the physical components being controlled and the software implementation of control algorithms can be verified together. We present an efficient approach to reachability analysis of Hybrid Automata Pushdown System (HAPS) models for cyber/physical co-verification...
Spectra-based fault localization (SFL) is an automatic fault-localization technique which has received a lot of attention due to its simplicity and effectiveness. SFL uses ranking metric (RM) to rank the risk of fault existence in each program entity after dynamically collecting the necessary information. The evaluation of RMs for SFL has recently become a research focus. To evaluate the average performance...
Almost every computer user has encountered an un-responsive system failure or system hang, which leaves the user no choice but to power off the computer. In this paper, the causes of such failures are analyzed in detail and one empirical hypothesis for detecting system hang is proposed. This hypothesis exploits a small set of system performance metrics provided by the OS itself, thereby avoiding modifying...
To generate test cases for the unit testing of business process written in BPEL, developers have to prepare input data for the BPEL process under test (PUT) and verification conditions for output data from the PUT. It could be a tedious task due to the complexity of the PUT which describes the Web flow of a distributed collaboration of individual service providers executing concurrently. This paper...
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