Abstraction Refinement for Large Scale Model Checking - download pdf or read online

By Chao Wang

ISBN-10: 0387341552

ISBN-13: 9780387341552

ISBN-10: 0387346007

ISBN-13: 9780387346007

Abstraction Refinement for big Scale version Checking summarizes contemporary learn on abstraction recommendations for version checking huge electronic process. contemplating either the scale of brand new electronic platforms and the ability of cutting-edge verification algorithms, abstraction is the one potential answer for the winning program of version checking concepts to industrial-scale designs. This e-book describes contemporary learn advancements in automated abstraction refinement suggestions. The suite of algorithms provided during this booklet has validated major development over earlier artwork; a few of them have already been followed through the EDA businesses of their commercial/in-house verification instruments.

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The solution to the latter problem is actually very straightforward [CLR90]. For instance, a two-input and gate Uj with inputs ui and Ur has the following set of clauses: {ui V ~^Uj) A {ur V ~^Uj) A {-^ui V -^Ur VUn'J J Finally, we review a procedure used in many modern SAT solvers [SS96, MMZ+01, GN02] to decide the satisfiabihty of a CNF formula. A formula is satisfiable if and only if there exists a set of assignments to the variables that makes the formula true. It is clear that for the entire CNF formula to be satisfiable, each individual clause must also be satisfiable.

Selecting a literal and making it true is called a decision. If a clause has only one unassigned literal and all the other literals are false, it is called a unit clause. Every unit clause triggers an implication—its only unassigned literal has to be true, otherwise, the clause is no longer satisfiable. The process of applying implications iteratively until no unit clause is left is called Boolean Constrain Propagation (BCP). A decision and the corresponding BCP restrict our attention into a subformula or a subset of the original clauses, since the rest of the clauses have been made true.

For our running example, Fo 70 Z^ = {aO, W, cO} _ = {aO, 60, cO, al, 61, cl, a2, 62, c2, a3, 63, c3} EXEZ^U(ZOAFO) = EX E{aO, 60, cO, al, 61, cl, a2,62, c2, a3, 63, c3} U {aO, 60, cO} - EX{al,60} = {al} Z2 ^ EXEZ^U{Z^ A Fo) = EXE{al}U{ } -EX{} -{} Symbolic Model Checking 25 Since no state in the composed system satisfies EGfairtrue, the language is empty. This method for deciding EGfair true is known as the Emerson and Lei algorithm [EL86], which is the representative of a class of SCO hull algorithms [SRB02].

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Abstraction Refinement for Large Scale Model Checking by Chao Wang

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