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71 commits

Author SHA1 Message Date
Nikolaj Bjorner
99e2794a6d update output 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-11-30 17:20:43 -08:00
Nikolaj Bjorner
42076a3c13 bug fixes to new core, elim_predicates and elim_unconstrained 2023-03-05 22:26:37 -08:00
Nikolaj Bjorner
1b0c76e3f0 fixes to mbqi in the new core based on #6575 2023-02-10 16:56:06 -08:00
Nikolaj Bjorner
c3e31149a5 fix #6530 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-01-10 13:43:17 -08:00
Nikolaj Bjorner
a4d4e2e483 track assertions 2023-01-09 15:18:33 -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
842e8057bc log also quantifier generation (besides binding) 
We add also logging for quantifier generation.
It is auxiliary information that is of use for diagnostics (axiom profiler).
 2022-10-20 17:49:15 -07:00
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