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Code Activity
19295 commits 50 branches 53 tags 183 MiB
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181 commits

Author SHA1 Message Date
Jakob Rath
ffa12eb37c flip args to match description 2023-01-05 16:43:01 +01:00
Clemens Eisenhofer
79e7380ffc Pseudo-inverse op_constraint 2023-01-03 17:47:54 +01:00
Nikolaj Bjorner
84a5ec221f diagnostics 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-02 18:11:00 -08:00
Nikolaj Bjorner
824c10711c testing inference based on complementary bounds 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-02 17:30:08 -08:00
Nikolaj Bjorner
56bda59de9 bugfix in parity code, add try_infer_parity_equality per status notes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-02 15:01:05 -08:00
Clemens Eisenhofer
0301686856 Variant of variable elimination 2023-01-02 20:05:13 +01:00
Nikolaj Bjorner
1c7ac12af8 wip 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-29 20:07:14 -08:00
Nikolaj Bjorner
f8a3e428ff wip 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-29 19:30:14 -08:00
Nikolaj Bjorner
96341d7f0a wip try_add_mul_bound2 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-29 18:31:39 -08:00
Nikolaj Bjorner
ed76da1458 Merge branch 'polysat' of https://github.com/z3prover/z3 into polysat 2022-12-29 16:55:56 -08:00
Nikolaj Bjorner
10589d59ba wip based on notes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-29 16:55:46 -08:00
Clemens Eisenhofer
6f78c33558 Generalized variable elimination 2022-12-29 22:36:04 +01:00
Nikolaj Bjorner
ab9a9d2308 wip - more general ranges for add_mul_bound 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-28 14:09:51 -08:00
Clemens Eisenhofer
658877365c Moved "easy part" of variable elimination to saturation.cpp 2022-12-28 15:07:03 +01:00
Nikolaj Bjorner
b4f5225ab3 outline 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-27 21:40:31 -08:00
Nikolaj Bjorner
b52379fe88 update 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-27 20:20:51 -08:00
Nikolaj Bjorner
67b9ecbd97 missing disequality parity constraint 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-25 16:13:26 -08:00
Nikolaj Bjorner
4c6499f28b updated notes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-25 15:28:34 -08:00
Nikolaj Bjorner
be5b6f2839 add analysis 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-25 15:14:40 -08:00
Nikolaj Bjorner
403a126642 remove try_factor_equality1 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-25 11:37:55 -08:00
Nikolaj Bjorner
49a7f8446d disable match_non_max and match_non_zero 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-24 15:19:37 -08:00
Nikolaj Bjorner
e978b81c7a add review comment to bug location 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-24 12:40:47 -08:00
Nikolaj Bjorner
48cd05c725 introduce try_factor_equality2, disabled as it exposes new bugs. Old bug on bench15.smt2 exposed in debug mode 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-24 12:05:54 -08:00
Nikolaj Bjorner
4e0604bc22 add hooks for multiplication overflow 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-23 15:48:03 -08:00
Nikolaj Bjorner
d18a2427a4 notes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-23 14:57:56 -08:00
Nikolaj Bjorner
50cbe2659a extract multiple bounds for upper/lower bound 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-23 14:52:41 -08:00
Nikolaj Bjorner
9275930f50 fix bug in add-overflow propagation, move to use viable to mind for bounds 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-23 13:38:51 -08:00
Nikolaj Bjorner
9fefa0040f added updated bounds propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-23 12:47:17 -08:00
Nikolaj Bjorner
6f8fb39bc9 added updated bounds propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-23 12:29:47 -08:00
Jakob Rath
fda93c97f5 Try bounds propagation for the example case 2022-12-23 18:15:40 +01:00
Jakob Rath
993996c8a5 Negate premise in lemma; fixes (or at least hides) the segfault 2022-12-23 17:18:10 +01:00
Jakob Rath
68b74ca6a7 parity debugging 2022-12-23 11:42:45 +01:00
Nikolaj Bjorner
1434c1117c wip - initial stab at bounds propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-22 21:49:33 -08:00
Nikolaj Bjorner
ce5cbefc56 fix missing parity propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-22 17:54:40 -08:00
Nikolaj Bjorner
ed6f7ee9ff adding addition overflow bounds propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-22 12:10:24 -08:00
Nikolaj Bjorner
0a75585073 revamp parity propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-20 17:45:33 -08:00
Nikolaj Bjorner
ca855fbad3 redoing parity lemmas 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-20 15:46:25 -08:00
Nikolaj Bjorner
a8d401864b review 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-20 12:46:15 -08:00
Nikolaj Bjorner
30bbb5399f add stub 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-18 22:02:42 -08:00
Nikolaj Bjorner
1c884c8d72 allow multiple lemmas during processing 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-18 19:03:28 -08:00
Nikolaj Bjorner
8c775f55a1 adding stub for non-overflow lemma (disabled as not seen to be of use) 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-18 12:26:30 -08:00
Nikolaj Bjorner
3c035daaa6 fix missing parity propagation 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-17 19:08:40 -08:00
Nikolaj Bjorner
b581cbf062 add lemmas 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-17 18:25:21 -08:00
Nikolaj Bjorner
a5f12e9d57 add parity constraint for disequality 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-12 19:40:19 -08:00
Nikolaj Bjorner
5a27ae6b53 disable tangent lemma, which appears to be counter-productive 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-11 12:56:21 -08:00
Nikolaj Bjorner
d092523733 bugfixes to try_factor_equality 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-10 10:51:21 -08:00
Nikolaj Bjorner
c27bd0d650 added try_factor 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-09 14:58:37 -08:00
Nikolaj Bjorner
a6b49d8b4e provide access to saturation for selected constraints 2022-12-08 19:17:35 -08:00
Nikolaj Bjorner
33902c7c9e fix parity propagation code, add tail-spin unit tests. The unit tests diverge because conflict resolution removes conflicting literals from the conflict clause before the decision variable gets processed. We have to change how conflict resolution is processed for such conflict clauses 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-12-08 09:57:38 -08:00
Jakob Rath
a81e05e660 We shouldn't assume that v is assigned 
Happens if it is a viable conflict for v
 2022-12-08 16:19:11 +01:00