Okay so there was another article recently which talked about a new fuzzing tool implemented by google that revealed thousands of bugs in safari and open source

Okay so there was another article recently which talked about a new fuzzing tool implemented by google that revealed thousands of bugs in safari and open source projects. I assume the exploitable edge cases are so numerous and so hard to have 100% test coverage on (is it even possible?) that it is hard enough for Intel to deal with correct execution on their own platform.