Differential static analysis
Shuvendu K. Lahiri, Kapil Vaswani, C. A. R. Hoare · 2010
It is widely believed that program analysis can be more closely targeted to the needs of programmers if the program is accompanied by further redundant documentation. This may include regression test suites, API protocol usage, and code contracts. To this should be added the largest and most redundant text of all: the previous version of the same program. It is the differences between successive versions of a legacy program already in use which occupy most of a programmer's time. Although differential analysis in the form of equivalence checking has been quite successful for hardware designs, it has not received as much attention in the static program analysis community.