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98 commits

Author SHA1 Message Date
Nikolaj Bjorner
d3183fafc7 remove binspr experiment 2025-01-12 13:39:26 -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
75c573877d updates to ddfw, initial local search phase option 2023-02-05 21:35:22 -08:00
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
f6595c161f add examples with proof replay 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-10-19 17:43:56 -07:00
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
828850f298 prepare for trim 2022-06-09 10:08:57 -07:00
Nikolaj Bjorner
4455f6caf8 move to get_sort as method, add opt_lns pass, disable xor simplification unless configured, fix perf bug in model converter update trail 2021-02-02 03:58:19 -08:00
Nikolaj Bjorner
d0e20e44ff booyah 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-07-04 15:56:30 -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
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
Nikolaj Bjorner
364fbda925 expose reorder config 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-07-22 15:30:06 -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
a2dddbd7a5 check pb solver 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-02-28 14:28:03 -08:00
Nikolaj Bjorner
69d7d8ff87 local 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-02-28 11:42:17 -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
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
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
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
Nikolaj Bjorner
563f337997 testing memory defragmentation, prefetch, delay ate 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-04-27 17:59:03 +02:00
Nikolaj Bjorner
252fb4af6e add backtracking conquer 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-04-14 15:34:33 -07:00
Nikolaj Bjorner
f7e49501af updates 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-04-13 16:22:36 -07:00
Nikolaj Bjorner
59b142f803 fixing local search 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-03-15 06:48:26 -07:00
Nikolaj Bjorner
4c1379e8c9 bug fixes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-02-19 21:49:03 -08:00
Nikolaj Bjorner
eca250933d disable uhle from lookahead solver 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-02-01 19:56:01 -08:00
Nikolaj Bjorner
c80f34102f adding ad-hoc method for converting models 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-12-28 17:29:31 -08:00
Nikolaj Bjorner
a5b663c52d add unit walk engine 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-12-17 16:09:07 -08:00
Nikolaj Bjorner
b3e5fade32 remove cache reset that causes crash 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-12-15 11:22:50 -08:00
Nikolaj Bjorner
71c52396cb fix transitive reduction bug, eliminate blocked tag on binary clauses, separate BIG structure from scc 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-12-13 02:38:06 -08:00