If testing reveals that only three of 25 … [to a bug], for example, you can focus your search for the failure's … search process, so much the better. This is … narrow the set of failure-inducing circumstances. Programmers supply … checks a set of changes to determine if … Delta Debugging code. … [p. 27] [For example] My colleagues and I used the … [we used Wynot to @ simplify HTML input that causes the Mozilla browser to fail-- after 57 test runs, only one of 896 HTML lines remained ...
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