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Rice's theorem表示,静态分析对于一些有意义的分析,不能得出 exact answer
Rice's Theorem对于non-trivial properties不存在精确答案。所以就有了sound、complete两个概念。
因为不存在exact answer,所以有两个选择:
静态分析一般的应用是compromise completeness的,及是sound的,可以有误报,但不能漏报。比如做一些bug的检测,宁可信其有,不可信其无,限定可能范围,排查错误。
在技术上实现 : Abstraction + Over-approximation
Static analysis:ensure(or get close to)soundness, while making good trade-offs between analysis precision and analysis speed.
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