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Tuesday 06 July 2010, 13:00-14:00
A Mechanically Verified AIG-to-BDD Conversion Algorithm
- đ¤ Speaker: Sol Swords (University of Texas)
- đ Date & Time: Tuesday 06 July 2010, 13:00 - 14:00
- đ Venue: Computer Laboratory, William Gates Building, Room SS03
Abstract
We present the mechanical verification of an algorithm for building a BDD from an AND /INVERTER graph (AIG). The algorithm uses two methods to simplify an input AIG using BDDs of limited size; it repeatedly applies these methods while varying the BDD size limit.
One method is similar to dynamic weakening in that it replaces oversized BDDs by a conservative approximation; the other method introduces fresh variables to represent oversized BDDs. This algorithm is written in the executable logic of the ACL2 theorem prover. The primary contribution is the verification of our conversion algorithm. We state its correctness theorem and outline the major steps needed to prove it.
Series This talk is part of the Computer Laboratory Automated Reasoning Group Lunches series.
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