Executable test sequence for the protocol control and data flow property with overlapping

We improve an earlier test sequence generation method for testing the conformance of a protocol implementation to its specification modeled by an extended finite state machine (EFSM) represented by a flow digraph. The earlier method produces an executable test sequence (i.e., one that has feasible parameter values) that covers a set of define-clear-use paths of the flow digraph for testing the data portion of the EFSM. We first overlap these define-clear-use paths into a shorter executable test sequence that tests the data portion. Second, we overlap the new test sequence with a set of transition-verifying paths for testing the control portion.