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sav08:verification_as_science [2010/02/22 10:56] vkuncak |
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| - | ====== Verification as Science ====== | + | ====== A Methodological View ====== |
| - | In this course we study how to build software analysis and verification tools, which automatically answer certain classes of questions about software systems of interest: | + | In this course we study how to build software analysis, verification, and synthesis tools, which automatically answer certain classes of questions about software systems of interest: |
| <draw name=sav08_big_picture> | <draw name=sav08_big_picture> | ||
| - | Example questions (with sample links): | + | Example questions in analysis and verification (with sample links): |
| * [[http://www.praxis-his.com/sparkada/publications_journals.asp|Will the program crash?]] | * [[http://www.praxis-his.com/sparkada/publications_journals.asp|Will the program crash?]] | ||
| * [[http://www.key-project.org/|Does it compute the correct result?]] | * [[http://www.key-project.org/|Does it compute the correct result?]] | ||
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| * [[http://portal.acm.org/citation.cfm?id=963948.963960|How much power does it consume?]] | * [[http://portal.acm.org/citation.cfm?id=963948.963960|How much power does it consume?]] | ||
| * [[http://dx.doi.org/10.1016/j.conengprac.2004.04.002|Will it turn off automated cruise control?]] ([[http://abcnews.go.com/Blotter/toyota-recalls-prius-lexus-437000-vehicles/story?id=9784512|recall]] and [[http://abcnews.go.com/Blotter/RunawayToyotas|other runaway Toyota stories]]) | * [[http://dx.doi.org/10.1016/j.conengprac.2004.04.002|Will it turn off automated cruise control?]] ([[http://abcnews.go.com/Blotter/toyota-recalls-prius-lexus-437000-vehicles/story?id=9784512|recall]] and [[http://abcnews.go.com/Blotter/RunawayToyotas|other runaway Toyota stories]]) | ||
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| + | In synthesis: Given a specification, find a program that satisfies this specification. | ||
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| + | <draw name=sav08_synth_picture> | ||
| Key steps in building such tools: | Key steps in building such tools: | ||
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| * automation means implementing **algorithms** for processing representation of software (e.g. source code) and representation of properties (e.g. formulas expressing desired properties), the study of these algorithms leads to questions of **decidability**, **computational complexity**, and **heuristics** that work on software systems of interest | * automation means implementing **algorithms** for processing representation of software (e.g. source code) and representation of properties (e.g. formulas expressing desired properties), the study of these algorithms leads to questions of **decidability**, **computational complexity**, and **heuristics** that work on software systems of interest | ||
| - | ===== Why Focus on Software ===== | ||
| - | We focus on software because our examples come from software and it is easier evaluate these techniques on software. | + | ===== Why Focus on SAV for Software ===== |
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| + | We focus on software because software systems are the most complex human-made artifacts. | ||
| + | * and we can also write them ourselves and provide examples | ||
| Techniques we describe also apply to hardware and other systems: | Techniques we describe also apply to hardware and other systems: | ||