Introduction to Bounded Model Checking Armin Biere FATS Seminar
Introduction to Bounded Model Checking Armin Biere FATS Seminar
Introduction to Bounded Model Checking Armin Biere FATS Seminar
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Interpolation in <strong>Model</strong> <strong>Checking</strong> BMC 20<br />
[McMillan’03]<br />
• SAT based technique <strong>to</strong> overapproximate frontiers Img(S C)<br />
– currently most effective technique <strong>to</strong> show that bad states are unreachable<br />
– better than BDDs and k-induction in many cases [HWMCC’08]<br />
• starts from a resolution proof refutation of a BMC problem with bound k + 1<br />
S C(s0) ∧ T (s0,s1) ∧ T (s1,s2) ∧ ··· ∧ T (s k,s k+1) ∧ B(s k+1)<br />
– result is a characteristic function f (s1) over variables of the second state s1<br />
– these states do not reach the bad state s k+1 in k steps<br />
– any state reachable from S C satisfies f : S C(s0) ∧ T (s0,s1) ⇒ f (s1)<br />
• k is bounded by the diameter (exponentially smaller than longest cycle free path)<br />
<strong>Introduction</strong> <strong>to</strong> <strong>Bounded</strong> <strong>Model</strong> <strong>Checking</strong> – <strong>FATS</strong> <strong>Seminar</strong> ETH 2009 <strong>Armin</strong> <strong>Biere</strong> – FMV – JKU Linz
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