NDLI: Lifting Propositional Interpolants to the Word-Level

Content Provider	IEEE Xplore Digital Library
Author	Kroening, Daniel Weissenbacher, Georg
Copyright Year	2007
Abstract	Craig interpolants are often used to approximate inductive invariants of transition systems. Arithmetic relationships between numeric variables require word-level interpolants, which are derived from word-level proofs of unsatisfiability. While word-level theorem provers have made significant progress in the past few years, competitive solvers for many logics are based on flattening the word-level structure to the bit-level. We propose an algorithm that lifts a resolution proof obtained from a bit-flattened formula up to the word-level, which enables the computation of word-level interpolants. Experimental results for equality logic suggest that the overhead of lifting the propositional proof is very low compared to the solving time of a state-of-the-art solver.
Starting Page	85
Ending Page	89
File Size	193376
Page Count	5
File Format	PDF
ISBN	9780769530239
DOI	10.1109/FAMCAD.2007.13
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-11-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interpolation Design automation Scholarships Decision feedback equalizers Hardware Logic Application software Cost accounting Contracts Arithmetic
Content Type	Text
Resource Type	Article

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Lifting Propositional Interpolants to the Word-Level