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Code Activity
18418 commits 24 branches 48 tags 158 MiB
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1584 commits

Author SHA1 Message Date
Lev Nachmanson
fd2b6c62d1 bug fix in gomory polarity 
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
 2024-01-01 05:25:07 -10:00
Lev Nachmanson
53c95e3627 cleanup 2023-12-28 06:00:57 -10:00
Lev Nachmanson
0728b81e9e add parameter lp_settings.m_gomory_simplify 2023-12-28 06:00:57 -10:00
Lev Nachmanson
5796e8899f use vector instead of unordered_map in gomory 
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
 2023-12-28 06:00:57 -10:00
Lev Nachmanson
a3529a0046 create bounds for gomory cuts with big numbers 2023-12-28 06:00:57 -10:00
Lev Nachmanson
af7691224e adding the polarity bound 2023-12-28 06:00:57 -10:00
Lev Nachmanson
19f3ad46ce fix the build 2023-12-20 14:14:01 -10:00
Lev Nachmanson
a00eb08ddd Merge branch 'master' of https://github.com/z3prover/z3 2023-12-20 12:56:55 -10:00
Lev Nachmanson
4317d134bf refactor: move gomory functionaly from int_solver to gomory 2023-12-20 12:56:20 -10:00
Nuno Lopes
b2d5c24c1d remove a few string copies 2023-12-20 16:55:09 +00:00
Lev Nachmanson
e28b644a67 remove an empty line 2023-12-20 06:53:59 -10:00
Lev Nachmanson
d6365610d5 change some TRACE statements 2023-12-20 06:49:55 -10:00
Lev Nachmanson
9a18628b17 remove unnecessary assignments 2023-12-18 18:49:27 -10:00
Nikolaj Bjorner
d0a59f3740 intblast with lazy expansion of shl, ashr, lshr 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-12-16 15:12:57 -08:00
Bruce Mitchener
50e0fd3ba6
Use noexcept more. (#7058) 2023-12-16 12:14:53 +00:00
Nikolaj Bjorner
9293923b8a Add intblast solver 2023-12-15 13:50:38 -08:00
Nikolaj Bjorner
0520558fc0 port updated pdd from polysat 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-12-15 08:54:03 -08:00
Bruce Mitchener
e90a844508
Use override more. (#7059) 2023-12-15 08:44:57 +00:00
Lev Nachmanson
536f4f84bb Merge branch 'master' of https://github.com/z3prover/z3 2023-12-12 15:23:43 -10:00
Nikolaj Bjorner
4d1d067d42 fix divergence reported by Guido Martinez 2023-12-07 13:34:35 -08:00
Nikolaj Bjorner
4a9b38e531 clean up nla_grobner 2023-12-04 17:08:17 -08:00
Lev Nachmanson
fc23a498c4 a simple version of choosing a column for gomory cut 2023-12-04 15:06:50 -10:00
Nikolaj Bjorner
de75692cb0 install importlib-resources for ubuntu doc 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-12-04 10:32:02 -08:00
Nikolaj Bjorner
f7415bb677 install importlib-resources for ubuntu doc 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-12-04 10:32:02 -08:00
Nikolaj Bjorner
f06e07ad0a fix cone of influence computation for terms with nested variables 
exposed by #7027, but generally missing. It is less likely to be exposed if input is normalized by distributing multiplication over addition.
 2023-12-03 12:42:42 -08:00
Nikolaj Bjorner
25dd29907b refine no-effect predicate to include value of ret 2023-12-03 12:41:21 -08:00
Nikolaj Bjorner
585d027668 remove assert #7032 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-12-02 14:12:41 -08:00
Nikolaj Bjorner
7eab26e3ef try with missed bounds 2023-12-02 10:48:40 -08:00
Lev Nachmanson
5784c2da79 remove an unnecessary if 2023-11-30 08:59:05 -10:00
Nikolaj Bjorner
26440ed3d8 deal with ubuntu/clang warnings 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-11-29 15:45:19 -08:00
Nikolaj Bjorner
41a3196c89 fix #7024 2023-11-29 13:35:30 -08:00
Christoph M. Wintersteiger
16753e43f1
Add accessors for RCF numeral internals (#7013) 2023-11-23 17:54:23 +01:00
Nikolaj Bjorner
ac105b7d8c remove unused code 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-11-19 11:47:00 -08:00
Nikolaj Bjorner
4350bd77ac check cancel flag to avoid unsound conflicts 2023-11-19 11:43:52 -08:00
Nikolaj Bjorner
35bc522dae #7003 
minor tweaks to gomory and reset n3 within loop (but the entire function is dead code).
 2023-11-19 09:59:44 -08:00
Nikolaj Bjorner
5b9fdcf462 fix #6997 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-11-15 18:08:48 -08:00
Nikolaj Bjorner
8a4e857294 #6523 
regressions from changes inside math/lp/int_solver
 2023-11-13 14:28:03 -08:00
Nikolaj Bjorner
3de5af3cb0 fix bug in bound simplification in Gomory for mixed integer linear cuts, enable fixed variable redution after bugfix, add notes that rewriting bounds does not work 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-11-10 16:39:04 +01:00
EyalBrilling
aa9c7912dc
fixed possible undefined variable assigment (#6985) 2023-11-10 11:36:24 +01:00
Nikolaj Bjorner
bd4d580b17 fix #6986 2023-11-08 13:49:30 +01:00
Nikolaj Bjorner
e6385f8c85 disable bound validation in debug mode 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-11-07 20:49:26 +01:00
Nikolaj Bjorner
3d99ed9dd4 Gomory cut / branch and bound improvements 
Improve fairness of cut generation by switching to find_infeasible_int_var with cascading priorities, allow stronger cuts by inlining terms.
 2023-11-07 19:59:02 +01:00
Nikolaj Bjorner
9f0b3cdc25 Add utility to expand sub-terms 2023-11-07 19:58:32 +01:00
Nikolaj Bjorner
fb95760137 remove template 2023-11-07 19:57:50 +01:00
Nikolaj Bjorner
77dab53e9e track number of Gomory cuts 2023-11-07 19:57:49 +01:00
Lev Nachmanson
14312ef8a3 remove some warnings with clang 
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
 2023-11-02 15:34:41 -07:00
Lev Nachmanson
08d3a82ce0 simplify the jump on entering 2023-11-02 11:09:01 -07:00
Lev Nachmanson
bdf1fcf5c1 remove an assert 2023-11-02 09:59:03 -07:00
Lev Nachmanson
ca6cb0af95 add changes in lp with validate_bound and maximize_term 
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
 2023-11-02 09:59:03 -07:00
Nikolaj Bjorner
49a071988c remove temporary algebraic numbers from upper layers, move to owner module 2023-11-01 03:52:20 -07:00