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updated release notes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-05-05 10:33:25 -07:00
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RELEASE_NOTES
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@ -3,12 +3,34 @@ RELEASE NOTES
Version 4.8.next
================
- Planned features
- rewritten NIA (non-linear integer arithmetic) core solver
- rewritten arithmetic solver replacing legacy arithmetic solver and on by default
- self-contained character theory, direct support for UTF8, Unicode character sets
- recursive function representation without hoisting ite expressions. Issue #2601
- improvements to regular expression processing
- specialized solver support for QF_ABV and ABV based on lazy SMT and dual reduction
- model-based interpolation for quantifier-free UF, arithmetic, arrays
- circuit optimization techniques for BV pre-processing
- the smtfd solver and tactic implement this strategy, but is not prime for users.
- introduction of simple induction lemmas to handle a limited repertoire of induction proofs.
- circuit optimization techniques for BV in-processing are available as the sat.cut
option, but at this point does not translate into benefits. It is currently
turned off by default.
Version 4.8.8
=============
- New features
- rewritten NIA (non-linear integer arithmetic) core solver
It is enabled in selected theories as default.
The legacy arithmetic solver remains the overall default in this release
as the rewritten solver shows regressions (on mainly NRA problems).
- recursive function representation without hoisting ite expressions. Issue #2601
- model-based interpolation for quantifier-free UF, arithmetic
- Julia bindings over the C++ API, thanks to ahumenberger
- Bug fixes
- numerous, many based on extensive fuzz testing.
Thanks to 5hadowblad3, muchang, numairmansur, rainoftime, wintered
- Notes
- recursive functions are unfolded with separate increments based on unsat core
analysis of blocking literals that are separate for different recursive functions.
- the seq (string) solver has been revised in several ways and likely shows some
regressions in this release.
Version 4.8.7
=============