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
a628e4c4e5
updates to printer to get instantiations, take 1
2022-08-25 11:22:35 -07:00
Nikolaj Bjorner
78eaefe5a8
move solver-params to params
2022-08-08 11:34:41 +03:00
Nikolaj Bjorner
ea2a843325
flat only
...
remove option for uzers (users who are in reality fuzzers) to toggle flat option. The legacy arithmetic solver bakes in assumptions about flat format so it isn't helpful to expose this to fuzzers, I mean uzers.
2022-06-30 19:59:46 -07:00
Nikolaj Bjorner
431c3af409
fix #5929 - add parameter bv_le2extract to allow disabling the disassembly to extract
2022-03-27 18:23:41 -10:00
Nikolaj Bjorner
fc77345bec
breaking change. Enforce append semantics everywhere for parameter updates #5744
...
Replace semantics doesn't work with assumptions made elsewhere in code.
The remedy is to apply append (override) semantics for parameter changes.
2021-12-30 19:11:14 -08:00
CEisenhofer
47fdd6c060
Added 16 bit string-encoding ( #5540 )
2021-09-09 11:35:16 +02:00
Nikolaj Bjorner
cf9e55fa96
#5516
...
expose ability to expand select/store and select/ite (lambdas are always expanded) during pre-processing for N.P. Lopes.
2021-09-01 17:44:17 -07:00
Nuno Lopes
524dcd35f9
reorder fields of context_params to save memory
...
plus improve error checking in context_params::set_uint
2021-04-13 18:35:58 +01:00
Nikolaj Bjorner
4b3fecc35e
remove dependency on ast from params
2021-03-15 15:40:41 -07:00
Nikolaj Bjorner
8412ecbdbf
fixes to new solver, add mode for using nlsat solver eagerly from nla_core
2021-03-14 13:57:04 -07:00
Nikolaj Bjorner
3f93cc3f0b
use unicode by default
...
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-01-30 16:39:31 -08:00
Nikolaj Bjorner
dafee71500
reshuffle unicode support to use global parameter, and use bit-vectors on demand
2021-01-21 14:24:26 -08:00
Nikolaj Bjorner
299e1788b8
fix #4808
...
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2020-11-21 15:03:17 -08:00
Nikolaj Bjorner
f354671465
add parameter for scenario from #4743
2020-10-30 01:14:34 -07:00
Nikolaj Bjorner
35e3d8425c
move fpa
...
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2020-08-29 11:16:21 -07:00
Nikolaj Bjorner
11c90cc142
move parameters from ast/rewriter to params
...
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2020-08-29 11:11:16 -07:00
Nikolaj Bjorner
455d53ef27
missing cmakelists
...
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2020-08-29 10:46:17 -07:00
Nikolaj Bjorner
b9cbb08858
shuffle dependencies
...
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2020-08-29 09:51:39 -07:00
