As explained in Section 8.3.2, adequacy assessment and test enhancement could be done concurrently by two or more testers. While the testers share a common test database, it might be possible that two...

As explained in Section 8.3.2, adequacy assessment and test enhancement could be done concurrently by two or more testers. While the testers share a common test database, it might be possible that two or more testers derive tests that are redundant in the sense that a test already derived a by a tester might have distinguished a mutant that some other tester has not been able to distinguish. Given that adequacy assessment is done by two testers, sketch a sequence of events that reveal the possibility of a redundant test case being generated. You could include events such as: Tester 1 generates mutants, tester 2 executes mutants, Tester 1 adds a new test case to the database, Tester 2 removes a test case from the database, and so on. Assume that (a) tester TS is allowed to remove a test case from the data base but only if it was created by TS and (b) the adequacy assessment process is started all over when a fault is discovered and fixed.