NDLI: Reasoning about Data: Bits, bit vectors, or words

Content Provider	IEEE Xplore Digital Library
Author	Bryant, R.E.
Copyright Year	2008
Description	Author affiliation: Carnegie Mellon Univ., Pittsburgh, PA (Bryant, R.E.)
Abstract	Summary form only given. Many techniques for test generation and verification require reasoning about data using automated mathematical or logical techniques. Classical methods for specifying and reasoning about programs consider each word to be an arbitrary numeric value. This has carried over into many program analysis tools, where decision procedures for integer or real arithmetic are used to reason about program behavior. At the other extreme, most automatic methods for reasoning about hardware operate at the bit level, viewing each signal as an independent Boolean function of the input and state bits. In between these extremes, data can be modeled by finite-precision arithmetic and bit-wise operations on fixed-width data words. A decision procedure for such a bit-vector model can accurately capture the behavior of actual systems, while also exploiting abstraction techniques that are difficult to recognize when the system is modeled purely at the bit level. Until recently, the best way to reason about bit vectors was to simply expand formulas into their bit-level representations and apply Boolean satisfiability (SAT) solvers. Several newer decision procedures have improved on this approach by combining SAT solving with word-level abstractions. Work in this area is already having major impact in both program analysis and hardware testing and verification.
Starting Page	2
Ending Page	2
File Size	119295
Page Count	1
File Format	PDF
ISBN	9781424416165
DOI	10.1109/VDAT.2008.4542396
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-23
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arithmetic Hardware USA Councils Automatic testing Logic testing Reasoning about programs Boolean functions
Content Type	Text
Resource Type	Article

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