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add to release notes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2015-10-05 09:31:14 -07:00
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RELEASE_NOTES
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@ -7,6 +7,14 @@ Version 4.4.1
- A multitude of bugs has been fixed.
- New Feature: Support for optimization queries. The SMT-LIB2 command language
is augmented by three commands (maximize <expr>), (minimize <expr)
and (assert-soft <expr> [:weight <numeral>] [:id <identifier>]).
The programmatic API also contains a dedicated context for solving
optimization queries. The TACAS 2015 tool paper by Bjorner, Dung and
Fleckenstein describes additional details and the online tutorial on
http://rise4fun.com/z3opt illustrates some uses.
Version 4.4.0
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