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17900 commits 24 branches 48 tags 158 MiB
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2054 commits

Author SHA1 Message Date
Bruce Mitchener
1eb84fe4b9
Mark override methods appropriately. (#6207) 2022-07-29 23:29:15 +02:00
Jakob Rath
d65dc82ef0 bailout state: add premises of assignment 2022-07-25 13:49:21 +02:00
Bruce Mitchener
3e38bbb009
Make sure all headers do #pragma once. (#6188) 2022-07-23 10:41:14 -07:00
Jakob Rath
1b370727b1 remove redundant subst_val 2022-07-21 13:15:02 +02:00
Jakob Rath
4a3fe8ab82 fix 2022-07-21 13:00:36 +02:00
Jakob Rath
e168d8a2eb Merge branch 'master' into polysat 2022-07-21 12:56:50 +02:00
Jakob Rath
48c6bea331 umul 2 2022-07-21 12:38:00 +02:00
Jakob Rath
d4592f2abf umul 2022-07-21 11:57:27 +02:00
Jakob Rath
8d871bf8b5 dead code 2022-07-21 11:48:41 +02:00
Nikolaj Bjorner
6c5747a80e guard against lemmas that are already true 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-07-15 10:03:31 -07:00
Nikolaj Bjorner
4ecb61aeaa neatify 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-07-15 09:53:56 -07:00
Nikolaj Bjorner
2696775088 remove stale assertion 
with support for substitutions we allow the simplifier to change the state of equations.
 2022-07-15 04:03:25 -07:00
Nikolaj Bjorner
b29cdca936 integrate factorization to Grobner 2022-07-14 21:24:27 -07:00
Nikolaj Bjorner
7c177584f3 add propagators to grobner 2022-07-14 15:45:07 -07:00
Nikolaj Bjorner
4a192850f2 add var_factors 
Add routine to partially factor polynomials. It factors out variables.
 2022-07-14 11:06:53 -07:00
Jakob Rath
c31503f67d improve output 2022-07-14 10:47:35 +02:00
Nikolaj Bjorner
981c82c814 fix initialization order 2022-07-13 18:11:18 -07:00
Nikolaj Bjorner
894fb836e2 fix build break (debug assertion) and isolate gomory functionality 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-07-13 17:26:56 -07:00
Nikolaj Bjorner
b81f70f6fc split nla_grobner to separate file 2022-07-13 13:05:57 -07:00
Nikolaj Bjorner
8900db527f add diagnostics for grobner 2022-07-12 20:49:54 -07:00
Nikolaj Bjorner
d5779bf99c handle trivial equalities in simplify_leaf 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-07-11 21:05:26 -07:00
Nikolaj Bjorner
316ed778e0 Tune Grobner equations 
\brief convert p == 0 into a solved form v == r, such that
   v has bounds [lo, oo) iff r has bounds [lo', oo)
   v has bounds (oo,hi]  iff r has bounds (oo,hi']

   The solved form allows the Grobner solver identify more bounds conflicts.
   A bad leading term can miss bounds conflicts.
   For example for x + y + z == 0 where x, y : [0, oo) and z : (oo,0]
   we prefer to solve z == -x - y instead of x == -z - y
   because the solution -z - y has neither an upper, nor a lower bound.

The Grobner solver is augmented with a notion of a substitution that is applied before the solver is run.
 2022-07-11 16:14:26 -07:00
Nikolaj Bjorner
f33c933241 Add substitution routine to pdd 
For Grobner we want to preserve directions of intervals for finding sign conflicts. This means that it makes sense to have external control over linear solutions.
 2022-07-11 12:10:28 -07:00
Nikolaj Bjorner
b68af0c1e5 working on reconciling perf for arithmetic solvers 
this update integrates inferences to smt.arith.solver=6 related to grobner basis computation and handling of div/mod axioms to reconcile performance with smt.arith.solver=2.

The default of smt.arth.nl.grobner_subs_fixed is changed to 1 to make comparison with solver=2 more direct.

The selection of cluster equalities for solver=6 was reconciled with how it is done for solver=2.
 2022-07-11 07:38:51 -07:00
Jakob Rath
003896991d fix merge 2022-07-01 17:16:40 +02:00
Jakob Rath
e5e79c1d4b Merge branch 'master' into polysat 2022-07-01 16:11:17 +02:00
Jakob Rath
d473c23e5b bailout for saturation lemmas 2022-07-01 11:51:52 +02:00
Nikolaj Bjorner
ff265235c1 adjust trace output 2022-06-29 08:20:01 -07:00
Jakob Rath
c78007fd1a Use mul_ovfl constraint directly instead of approximating it with bounds 2022-06-29 14:28:59 +02:00
Jakob Rath
69a28a7740 fix check against looping 2022-06-29 14:27:11 +02:00
Jakob Rath
0fb8c72f50 print more information 2022-06-29 14:26:25 +02:00
Nuno Lopes
73a24ca0a9 remove '#include <iostream>' from headers and from unneeded places 
It's harmful to have iostream everywhere as it injects functions in the compiled files
 2022-06-17 14:10:19 +01:00
Nikolaj Bjorner
3d00d1d56b prepare for equality propagation from Grobner basis 
Attempt to remedy performance regressions from the new solver core for NLA. It misses easy lemmas, presumably due to weaker bounds information.
 2022-06-14 09:51:07 -07:00
Nikolaj Bjorner
35986f3979 fix #6084 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-06-07 11:29:57 -07:00
Nikolaj Bjorner
b629960afb proof format 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-06-06 07:18:33 -07:00
Nikolaj Bjorner
da3f31697b fix proof checking for bounds propagation 2022-05-30 10:18:16 -07:00
Nikolaj Bjorner
35db0ae58b workaround manylinux build failure (it is advertized as a compiler bug) 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-28 14:34:58 -07:00
Jakob Rath
2345fb6428 Support watching inactive constraints 
This allows us to handle non-redundant clauses (like we get from quot_rem)
 2022-05-27 15:49:54 +02:00
Nikolaj Bjorner
186a3c58e5 merge 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-15 12:00:25 -07:00
Arie Gurfinkel
7f62fa2b66
Sparse matrix kernel (#6035) 
* Subtle bug in kernel computation

Coefficient was being passed by reference and, therefore, was
being changed indirectly.

In the process, updated the code to be more generic to avoid rational
computation in the middle of matrix manipulation.

* sparse_matrix: fixed handling of 0 in add_var() and add()

particularly in add_var(), without the fix the user is responsible for checking
coefficients for 0.
 2022-05-13 17:30:35 -07:00
Nikolaj Bjorner
6deb4dee37 disable normalize 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-11 13:30:50 -07:00
Nikolaj Bjorner
5aec9b32bd check zero 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-11 10:13:07 -07:00
Nikolaj Bjorner
860d904699 check zero 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-11 10:11:17 -07:00
Nikolaj Bjorner
361155685c ensure abs 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-11 09:09:00 -07:00
Nikolaj Bjorner
cbaa16df57 lcm normalization 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-11 09:03:57 -07:00
Nikolaj Bjorner
5ca3bc3212 kernel 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-10 15:48:06 -07:00
Nikolaj Bjorner
2928cc261c fix 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-10 13:17:25 -07:00
Nikolaj Bjorner
805443c8ab wip 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-10 11:17:34 -07:00
Nikolaj Bjorner
0557d72d1c na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-10 07:42:32 -07:00
Nikolaj Bjorner
6a8ac5f9b1 adding K 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-05-09 16:47:26 -07:00