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71 commits

Author SHA1 Message Date
Nikolaj Bjorner
d9e7b8c21f fixes to trim 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-07-03 19:26:19 +02:00
Nikolaj Bjorner
5f22e98396 fix #6766 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2023-06-18 10:05:34 -07:00
Nikolaj Bjorner
25b0b1430c move bound_manager to simplifiers, add bound manager to extract_eqs for solve-eqs #6532 2023-01-12 12:42:28 -08:00
Nikolaj Bjorner
fc30461828 unused variables 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-10-20 09:09:06 -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
d4885abdc0 fix #6400 
bi-implication was treated as an atomic formula leading to incorrect projection.
 2022-10-17 11:00:21 -07:00
Nikolaj Bjorner
d88384fd51 fix compiler warning 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-10-16 15:03:46 -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
993ff40826 fixes to proof logging and checking 2022-10-15 12:42:50 +02:00
Nikolaj Bjorner
a2e0646eed wip - proof checker 2022-10-12 09:34:49 +02:00
Nikolaj Bjorner
de69874076 wip - adding proof checkers, fixes to quantifier proof certificates 2022-10-10 09:46:22 +02:00
Nikolaj Bjorner
35639c5ac0 adding q proof hints 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-10-07 19:21:21 +02:00
Nikolaj Bjorner
5c9f69829b fixes to trim 2022-10-07 09:58:12 +02:00
Nikolaj Bjorner
9f78a96c1d wip - trim 2022-10-06 18:19:03 +02:00
Nikolaj Bjorner
4e780d0cc8 trim 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-10-05 05:43:48 +02:00
Nikolaj Bjorner
c1c659dc93 trying trim 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-10-04 16:25:40 +02:00
Nikolaj Bjorner
ab045f0645 fix build 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-09-30 16:52:19 -04:00
Nikolaj Bjorner
b9cba82531 work on proof checking 
- add outline of trim routine
- streamline how proof terms are checked and how residue units are extracted.
 2022-09-30 13:04:19 -04:00
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
6a61efbf99 add missing override 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-09-05 13:35:53 -07:00
Nikolaj Bjorner
3011b34b3b log E-matching based quantifier instantiations as hints 2022-08-31 18:59:02 -07:00
Nikolaj Bjorner
4abff18e8d fill in missing pieces of proof hint checker for Farkas and RUP 
The proof validator based on SMT format proof logs uses RUP to check propositional inferences and has plugins for theory axioms/lemmas.
 2022-08-31 05:29:15 -07:00
Nikolaj Bjorner
0f475f45b5 Add RUP checking mode to proof checker. 2022-08-30 09:45:19 -07:00
Nikolaj Bjorner
8b8caf9ded re-add smt-solver for proof_cmds 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-08-28 18:19:30 -07:00
Nikolaj Bjorner
f65a244385 move proof_cmds 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-08-28 18:11:26 -07:00
Bruce Mitchener
3e38bbb009
Make sure all headers do #pragma once. (#6188) 2022-07-23 10:41:14 -07:00
Nikolaj Bjorner
32614722ef fix #6176 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-07-20 21:19:20 -07:00
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
Nikolaj Bjorner
4a6083836a call it data instead of c_ptr for approaching C++11 std::vector convention. 2021-04-13 18:17:35 -07:00
Nikolaj Bjorner
937b61fc88 fix build, refactor 2021-02-02 05:26:57 -08:00
Nikolaj Bjorner
2f756da294
adding dt-solver (#4739) 
* adding dt-solver

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

* dt

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

* move mbp to self-contained module

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

* files

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

* Create CMakeLists.txt

* dt

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

* rename to bool_var2expr to indicate type class

* mbp

* na
 2020-10-18 15:28:21 -07:00
Nikolaj Bjorner
d0e20e44ff booyah 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-07-04 15:56:30 -07:00
Nikolaj Bjorner
794aafa6f8 fix warnings 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-23 12:14:34 -06:00
Nikolaj Bjorner
4e81085292 na 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-21 10:29:42 -06:00
Nikolaj Bjorner
78a1736bd2 prepare symbols to be more abstract, update mbi, delay initialize some modules 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-01-10 12:02:08 -08:00
Nikolaj Bjorner
9566d379d6 merge 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-06-12 19:44:56 -07:00
Nikolaj Bjorner
9bd4050e0c use ref-vector for shared occurrences to avoid hash-table overhead 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-01-11 13:43:39 -08:00
Nikolaj Bjorner
0d400a5ad6 fix bit2bool bug reported by Jianying Li 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-01-04 07:46:53 -08:00
Nikolaj Bjorner
bd53fa801e handle case input format 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-10-17 21:42:18 -07:00
Nikolaj Bjorner
20fc573d5b add laxer check for oeq_quant_intro 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-27 11:24:56 -07:00
Nikolaj Bjorner
520ce9a5ee integrate lambda expressions 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-26 07:23:04 -07:00
Nikolaj Bjorner
9ba76a1332 fixing eufi 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:52 -07:00
Nikolaj Bjorner
ec8e3f2aee consolidate use of plugin by moving declarations up front (separate from constructor at this point) 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:52 -07:00
Nikolaj Bjorner
ba504e4243 debugging mbi 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:52 -07:00
Nikolaj Bjorner
008f003aa0 initial working version 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:52 -07:00
Nikolaj Bjorner
da18f0e0b7 prepare term-graph unit testing 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:51 -07:00
Nikolaj Bjorner
d26609ebdd prepare term-graph for cc 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:51 -07:00
Nikolaj Bjorner
0784074b67 fixes 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:51 -07:00
Nikolaj Bjorner
688cf79619 working on mbi 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:51 -07:00
Arie Gurfinkel
275b99e408 Add missing override 2018-06-14 16:08:50 -07:00