mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-11 19:53:34 +00:00
Code Activity
17150 commits 23 branches 48 tags 156 MiB
Commit graph

64 commits

Author SHA1 Message Date
Nikolaj Bjorner 6d6752b2aa #6364 2022-10-20 16:39:43 -07:00
Nikolaj Bjorner e2cfc53c9f #6364 
skip proof hint unless proofs are on
 2022-10-13 15:31:58 +02:00
Nikolaj Bjorner fceedf60dc wip - proofs 2022-10-10 16:41:09 +02:00
Nikolaj Bjorner de69874076 wip - adding proof checkers, fixes to quantifier proof certificates 2022-10-10 09:46:22 +02:00
Nikolaj Bjorner 107981f099 update proof formats for new core 
- update proof format for quantifier instantiation to track original literals
- update proof replay tools with ability to extract proof object

The formats and features are subject to heavy revisions.

Example
```
(set-option :sat.euf true)
(set-option :sat.smt.proof eufproof.smt2)
(declare-fun f (Int) Int)
(declare-const x Int)
(assert (or (= (f (f (f x))) x) (= (f (f x)) x)))
(assert (not (= (f (f (f (f (f (f x)))))) x)))
(check-sat)
```

eufproof.smt2 is:
```
(declare-fun x () Int)
(declare-fun f (Int) Int)
(define-const $24 Int (f x))
(define-const $25 Int (f $24))
(define-const $26 Int (f $25))
(define-const $27 Bool (= $26 x))
(define-const $28 Bool (= $25 x))
(assume $27 $28)
(define-const $30 Int (f $26))
(define-const $31 Int (f $30))
(define-const $32 Int (f $31))
(define-const $33 Bool (= $32 x))
(assume (not $33))
(declare-fun rup () Proof)
(infer (not $33) rup)
(declare-fun euf (Bool Bool Proof Proof Proof Proof) Proof)
(declare-fun cc (Bool) Proof)
(define-const $42 Bool (= $32 $30))
(define-const $43 Proof (cc $42))
(define-const $40 Bool (= $31 $24))
(define-const $41 Proof (cc $40))
(define-const $38 Bool (= $30 $25))
(define-const $39 Proof (cc $38))
(define-const $36 Bool (= $24 $26))
(define-const $37 Proof (cc $36))
(define-const $34 Bool (not $33))
(define-const $44 Proof (euf $34 $28 $37 $39 $41 $43))
(infer (not $28) $33 $44)
(infer (not $28) rup)
(infer $27 rup)
(declare-fun euf (Bool Bool Proof Proof Proof) Proof)
(define-const $49 Bool (= $32 $26))
(define-const $50 Proof (cc $49))
(define-const $47 Bool (= $31 $25))
(define-const $48 Proof (cc $47))
(define-const $45 Bool (= $24 $30))
(define-const $46 Proof (cc $45))
(define-const $51 Proof (euf $34 $27 $46 $48 $50))
(infer $33 $51)
(infer rup)
```

Example of inspecting proof from Python:

```
from z3 import *

def parse(file):
    s = Solver()
    set_option("solver.proof.save", True)
    set_option("solver.proof.check", False)
    s.from_file(file)
    for step in s.proof().children():
        print(step)

parse("../eufproof.smt2")
```

Proof checking (self-validation) is on by default.
Proof saving is off by default.

You can use the proof logs and the proof terms to retrieve quantifier instantiations from the new core.

The self-checker contains a few built-in tuned checkers but falls back to self-checking inferred clauses using SMT.
 2022-09-28 10:40:43 -07:00
Nikolaj Bjorner d7b9cc70d0 smc 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-09-25 18:03:16 -07:00
Nikolaj Bjorner 1f150ecd52 #6319 
#6319 - fix incompleteness in propagation of default to all array terms in the equivalence class.

Fix bug with q_mbi where domain restrictions are not using values because the current model does not evaluate certain bound variables to values. Set model completion when adding these bound variables to the model to ensure their values are not missed.

Add better propagation of diagnostics when tactics and the new solver return unknown. The reason for unknown can now be traced to what theory was culprit (currently no additional information)
 2022-09-23 22:22:34 -05:00
Nikolaj Bjorner e54635e0ed rename statistics to something more meaningful: instantiations from MBQI are tagged with mbi 2022-09-18 17:23:00 -07:00
Nikolaj Bjorner ac5b190a72 track instantiations from MBQI in proof logging for new solver 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-09-01 08:51:53 -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 2fedcbd41e #5778 2022-04-02 01:27:56 -07:00
Nikolaj Bjorner 90fd3d82fc enable propagation 2022-01-08 19:00:56 -08:00
Nikolaj Bjorner 9cbec3b0ca #5641 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-01-02 19:15:23 -08:00
Nikolaj Bjorner 43e449a805 #5641 2022-01-02 17:53:26 -08:00
Nikolaj Bjorner d0fb3cba15 #5641 - projection that skips interpreted functions can violate model evaluation. 2022-01-02 17:45:43 -08:00
Nikolaj Bjorner b87b464e69 set relevancy flag on enode 2021-12-29 17:57:28 -08:00
Nikolaj Bjorner a90b66134d make roots uniform for theory lemmas 2021-12-29 13:42:11 -08:00
Nikolaj Bjorner 6f31d83633 fix #5541 2021-09-20 10:10:28 -07:00
Nikolaj Bjorner fea14245a0 #5454 2021-08-11 19:43:42 -07:00
Nikolaj Bjorner 7ae4e93e86 Sharon & Neta notes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-08-03 16:45:25 -07:00
Nikolaj Bjorner bcf0f671b8 disable drat inside of quantifier elaboration 2021-07-30 23:27:37 -07:00
Nikolaj Bjorner b8a437bd8a #5429 
relevancy propagation applies to quantifier unfolding.
 2021-07-29 15:05:06 -07:00
Nikolaj Bjorner 16413b4f9a #5429 2021-07-27 17:18:22 -07:00
Nikolaj Bjorner 574246ff7a #5420 2021-07-20 15:29:24 -07:00
Nikolaj Bjorner 36d265a32c na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-07-18 12:06:45 +02:00
Nikolaj Bjorner 6f2bf37268 #5336 missing theory variable creation in fpa_solver 2021-07-17 20:31:11 +02:00
Nikolaj Bjorner ed9341e3b0 #5336 2021-06-19 22:22:56 -07:00
Nikolaj Bjorner df9084ba23 #5336 2021-06-16 19:12:50 -05:00
Nikolaj Bjorner c6f0afa008 #5324 2021-06-08 12:29:16 -07:00
Nikolaj Bjorner 85b672ee85 #5324 2021-06-04 17:54:19 -07:00
Nuno Lopes 5e034e495f fix compiler warnings 2021-02-19 10:33:41 +00:00
Nikolaj Bjorner 83f4a006c6 wreckfun 2021-02-12 19:46:47 -08:00
Nikolaj Bjorner 25f53c0467 deal with warnings reported in https://launchpadlibrarian.net/522361319/buildlog_ubuntu-groovy-s390x.z3_4.8.10-1ubuntu4ppa1_BUILDING.txt.gz 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-02-11 13:49:47 -08:00
Nikolaj Bjorner a152bb1e80 remove template Context dependency in every trail object 2021-02-08 15:41:57 -08:00
Nikolaj Bjorner 937b61fc88 fix build, refactor 2021-02-02 05:26:57 -08:00
Nikolaj Bjorner 3ae4c6e9de refactor get_sort 2021-02-02 04:45:54 -08:00
Nikolaj Bjorner 80033a5527 na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-01-19 23:21:47 -08:00
Nikolaj Bjorner 7c34a54e8a try different command-line 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-01-19 04:28:22 -08:00
Nikolaj Bjorner 01418a06a3 better staging of mbi based on generation 2021-01-18 16:55:58 -08:00
Nikolaj Bjorner d1dab327cd fix build 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-01-11 23:51:40 -08:00
Nikolaj Bjorner 0173359a50 debugging/testing mbi 2021-01-07 17:32:05 -08:00
Nikolaj Bjorner 523578e3f6 working on new solver core 2020-12-30 14:38:41 -08:00
Nikolaj Bjorner 374ae52d70 testing mbi 2020-12-26 13:49:59 -08:00
Nikolaj Bjorner 372e5ca569 fixes in new solver 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-12-25 11:19:31 -08:00
Nikolaj Bjorner a4354c960c na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-11-08 17:18:17 -08:00
Nikolaj Bjorner ab199dedf9 debug arith/mbi 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-11-02 12:13:19 -08:00
Nikolaj Bjorner fb6e7e146b test mbi 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-10-30 17:03:04 -07:00
Nikolaj Bjorner a764d528a1 'clean 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-10-30 13:14:48 -07:00
Nikolaj Bjorner d64bc795f0 wrong assert, compiler warnings 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-10-30 10:10:59 -07:00
Nikolaj Bjorner 2e684d58d2 redo purification 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-10-29 11:06:31 -07:00