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117 commits

Author SHA1 Message Date
Nikolaj Bjorner
27171591d1
Update sat_params.pyg 
spellcheck from https://github.com/microsoft/z3guide/pull/165
 2024-01-12 09:49:56 -08:00
Nikolaj Bjorner
fd97be0e3e move sat.smt.proof.check_rup into solver.proof.check_rup #6616 2023-03-01 21:03:27 -08:00
Nikolaj Bjorner
90a75866fb elaborating on local-search rephase strategy 2023-02-07 03:17:52 -08:00
Nikolaj Bjorner
dd1ca8f6bd move qhead to attribute on the state instead of the simplifier, 
- add sat.smt option to enable the new incremental core (it is not ready for mainstream consumption as cloning and other features are not implemented and it hasn't been tested in any detail yet).
- move "name" into attribute on simplifier so it can be reused for diagnostics by the seq-simplifier.
 2022-11-29 16:36:02 +07:00
Nikolaj Bjorner
c7781f346d move parameter sat.smt.proof to solver.proof.log 
this update breaks use cases that set sat.smt.proof to True.
As it is such a new feature and the change affects possibly at most the tutorial it is made without compatibility layers.
 2022-11-23 11:37:23 +07:00
Nikolaj Bjorner
e33e66212c propagate values should not flatten and/or 
also, elim_uncstr should only be disabled on recursive functions
 2022-11-12 18:03:47 -08:00
Nikolaj Bjorner
ac1552d194 wip - updates to proof logging and self-checking 
move self-checking functionality to inside sat/smt so it can be used on-line and not just off-line.

when self-validation fails, use vs, not clause, to check. It allows self-validation without checking and maintaining RUP validation.

new options sat.smt.proof.check_rup, sat.smt.proof.check for online validation.

z3 sat.smt.proof.check=true sat.euf=true /v:1 sat.smt.proof.check_rup=true /st file.smt2 sat.smt.proof=p.smt2
 2022-10-16 23:33:30 +02:00
Nikolaj Bjorner
e2f4fc2307 overhaul of proof format for new solver 
This commit overhauls the proof format (in development) for the new core.

NOTE: this functionality is work in progress with a long way to go.
It is shielded by the sat.euf option, which is off by default and in pre-release state.
It is too early to fuzz or use it. It is pushed into master to shed light on road-map for certifying inferences of sat.euf.

It retires the ad-hoc extension of DRUP used by the SAT solver.
Instead it relies on SMT with ad-hoc extensions for proof terms.
It adds the following commands (consumed by proof_cmds.cpp):

- assume  - for input clauses
- learn   - when a clause is learned (or redundant clause is added)
- del     - when a clause is deleted.

The commands take a list of expressions of type Bool and the
last argument can optionally be of type Proof.
When the last argument is of type Proof it is provided as a hint
to justify the learned clause.

Proof hints can be checked using a self-contained proof
checker. The sat/smt/euf_proof_checker.h class provides
a plugin dispatcher for checkers.
It is instantiated with a checker for arithmetic lemmas,
so far for Farkas proofs.

Use example:
```
(set-option :sat.euf true)
(set-option :tactic.default_tactic smt)
(set-option :sat.smt.proof f.proof)
(declare-const x Int)
(declare-const y Int)
(declare-const z Int)
(declare-const u Int)
(assert (< x y))
(assert (< y z))
(assert (< z x))
(check-sat)
```

Run z3 on a file with above content.
Then run z3 on f.proof

```
(verified-smt)
(verified-smt)
(verified-smt)
(verified-farkas)
(verified-smt)
```
 2022-08-28 17:44:33 -07:00
Nikolaj Bjorner
ce1f3987d9 fix unsoundness in quantifier propagation #6116 and add initial lemma logging 2022-08-23 19:10:01 -07:00
Nikolaj Bjorner
97437bce4c Update sat_params.pyg 2022-06-09 10:09:30 -07:00
Nikolaj Bjorner
828850f298 prepare for trim 2022-06-09 10:08:57 -07:00
Nikolaj Bjorner
ed7d969366 elaborate on smt/drat format outline, expose euf mode as config 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-08-31 19:29:23 -07:00
Nikolaj Bjorner
c21a2fcf9f sat solver setup 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-08-26 09:40:42 -07:00
Jack Yao
55cd1e996c
add sat option for doing a global simplification before the bounded search and the main CDCL search loop. The option is also used for the sat-preprocess tacitc (#4514) 
Co-authored-by: rainoftime <rainoftime@gmail.com>
 2020-06-12 16:45:50 -07:00
Nikolaj Bjorner
95a78b2450
updates to seq and bug fixes (#4056) 
* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #4037

* nicer output for skolem functions

* more overhaul of seq, some bug fixes

* na

* added offset_eq file

* na

* fix #4044

* fix #4040

* fix #4045

* updated ignore

* new rewrites for indexof based on #4036

* add shortcuts

* updated ne solver for seq, fix #4025

* use pair vectors for equalities that are reduced by seq_rewriter

* use erase_and_swap

* remove unit-walk

* na

* add check for #3200

* nits

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* name a type

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove fp check

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* remove unsound axiom instantiation for non-contains

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix rewrites

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #4053

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* fix #4052

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-04-22 13:18:55 -07:00
Nikolaj Bjorner
b4e7730034 fix #3938 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-04-13 13:05:53 -07:00
Nikolaj Bjorner
24dd047892 fix #3397, use it or lose it 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-03-18 11:06:19 -07:00
Nikolaj Bjorner
05158b3914 add cut redundancies 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-03-01 12:49:59 -08:00
Nikolaj Bjorner
e8f7a08289 add stubs for npn3 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-02-27 21:19:40 -08:00
Nikolaj Bjorner
dddd740846 make aig/ite extraction conditional 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-02-25 16:27:13 -08:00
Nikolaj Bjorner
c71da17a10 add output for inprocessing 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-02-22 11:50:51 -08:00
Nikolaj Bjorner
d1e95a133b add simplifiation pass 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-02-22 11:21:53 -08:00
Nikolaj Bjorner
dd3e77107e rename aig_simplifier to cut_simplifier 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-02-18 18:29:59 -08:00
Nikolaj Bjorner
c46e36ce58 bug fixes to LUT extraction, bug fix for real value case of freedom intervals 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-02-11 14:25:25 -08:00
Nikolaj Bjorner
e1fb74edc5 add ite-finder, profile 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-05 16:46:50 -08:00
Nikolaj Bjorner
d27a949ae9 add anf and aig simplifier modules, cut-set enumeration, aig_finder, hoist out xor_finder from ba_solver 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-05 16:46:49 -08:00
Nikolaj Bjorner
40a4326ad4 add anf 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-05 16:46:49 -08:00
Nikolaj Bjorner
a337a51374 fixes for #2513 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-08-23 23:29:24 +03:00
Bruce Mitchener
e2122c0d3d Fix whitespace issues in *.pyg. 2019-08-15 10:19:33 -07:00
Nikolaj Bjorner
364fbda925 expose reorder config 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-07-22 15:30:06 -07:00
Nikolaj Bjorner
a9a26e5f2e review comments by Elffers 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-07-21 06:52:02 -07:00
Nikolaj Bjorner
cd93cdd819 na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-07-09 07:40:29 +01:00
Nikolaj Bjorner
d17248821a include chronological backtracking, two-phase sat, xor inprocessing, probsat, ddfw 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-06-13 08:45:21 -07:00
Nikolaj Bjorner
4c76d43670 add binary_merge encoding option 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-02-28 08:35:22 -08:00
Nikolaj Bjorner
5cdfa7cd1c variations on unit-walk 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-02-13 17:43:15 -08:00
Nikolaj Bjorner
08ce6f7ac1 working on binary drat format 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-01-30 08:54:59 -08:00
Nikolaj Bjorner
dc77579707 delta faction to control double lookahead eagerness 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-12-04 23:41:03 -08:00
Nikolaj Bjorner
719bc5cd5d merge 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-10-30 17:23:31 -05:00
Nikolaj Bjorner
3c1c3d5987 fix #1908 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-10-30 14:15:29 -05:00
Nikolaj Bjorner
e9d615e309 merge 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-10-14 15:16:22 -07:00
Bruce Mitchener
5bd93b8a77 Typo fixes. 2018-10-12 23:38:53 +07:00
Nikolaj Bjorner
f5fea8ae30 add parameter to force sat-cleaning on initialization and on simplification phases 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-10-11 22:05:04 -07:00
Nikolaj Bjorner
9a09689dfa add documentation on the cuber 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-09-22 19:19:05 -07:00
Nikolaj Bjorner
9ad17296c2 update parameters 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-09-03 17:22:48 -07:00
Nikolaj Bjorner
c8730daea7 fix memory leak, add strengthening 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-09-03 16:56:07 -07:00
Nikolaj Bjorner
e4ae80b3f2 update documentation for renamed parameter 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-07-06 21:25:38 -07:00
Nikolaj Bjorner
3ae0ea8246 add circuit and unate encoding besides sorting option 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-07-06 21:09:13 -07:00
Nikolaj Bjorner
2aedaf315a fix removal bug, tune all-interval usage 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-05-09 16:32:38 +01:00
Nikolaj Bjorner
13b54f379c fix ema 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-05-05 13:58:47 +02:00
Nikolaj Bjorner
e940f53e9c n/a 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-04-30 07:57:33 -07:00