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affeq: optimize sparse affeq join #1773
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DrMichaelPetter
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Next step is the evaluation, whether the changes are sound, and how much this impacts the performance, by running this on SVCOMP. |
SV Comp shows no wrong verdicts, this is looking good. |
michael-schwarz
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Jul 3, 2025
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I did not really investigate the algorithm, but just left some code style remarks.
One big beautiful commit Co-authored-by: Michael Schwarz <[email protected]>
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performance
Analysis time, memory usage
relational
Relational analyses (Apron, affeq, lin2var)
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following #1625 , we can optimize the sparse affeq join even more: During join, we have several occasions where our implementation insists on accessing vectors via
nth
. By cleverly rewriting the the procedure for disjunction of linear equalities, we can get rid of the harmful instances of this, hopefully making affine equalities an even more viable domain.