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* Major restructuring of the code.Alan Mishchenko2012-01-211-357/+0
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* Implemented rollback in the main SAT solver and updated PDR to use it (saves ↵Alan Mishchenko2011-12-101-9/+10
| | | | about 5% of runtime).
* Improvements to timeout.Alan Mishchenko2011-05-111-0/+2
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* Unsuccessful attempt to improve PDR and a few minor changes.Alan Mishchenko2011-04-071-1/+1
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* New code since Dec 2010.Alan Mishchenko2011-01-131-0/+354