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Code Activity
19340 commits 23 branches 48 tags 157 MiB
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26 commits

Author SHA1 Message Date
Nuno Lopes 8061765574 remove default destructors & some default constructors 
Another ~700 KB reduction in binary size
 2024-09-04 22:30:23 +01:00
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 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 78ebe0a94c fix #3701 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-04-02 06:22:32 -07:00
Nikolaj Bjorner 493671aa72 fix #3520 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-03-26 09:58:06 -07:00
Nikolaj Bjorner 498864c582 adding dump facility for cancelation #2095, easing dimacs in/out 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2019-01-24 12:21:23 -08:00
Bruce Mitchener cdfc19a885 Use nullptr. 2018-10-02 09:11:19 +07:00
Nikolaj Bjorner fdcedee887 hardening pop abuse and exception safety for #1776 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-07-30 09:56:16 -07:00
Nikolaj Bjorner bfeb15b876 move to list of clauses 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-06-14 16:08:50 -07:00
Arie Gurfinkel 26339119e4 solver::check_sat_cc : check_sat assuming cube and clause 
Extends check_sat with an ability to assume a single clause in
addition to assuming a cube of assumptions
 2018-06-14 16:08:50 -07:00
Nikolaj Bjorner fa0c75e76e rename to core2 to avoid overloaded virtual 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-02-07 15:13:13 -08:00
Nikolaj Bjorner 5a8154c156 fix errors 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2018-02-07 14:47:16 -08:00
Nikolaj Bjorner 0d15b6abb7 add stubs for converting assertions, consolidate filter_model_converter 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-11-17 14:51:13 -08:00
Nikolaj Bjorner b19f94ae5b make include paths uniformly use path relative to src. #534 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2017-07-31 13:24:11 -07:00
Nikolaj Bjorner 8d2b70a5e2 better encodings for at-most-1, #755 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2016-10-10 23:46:03 -07:00
Christoph M. Wintersteiger f54a7db108 Added debug traces. 2016-08-09 16:36:49 +01:00
Nikolaj Bjorner 8221a09659 fast path for antecedent extraction in smt_context 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2016-07-28 16:49:19 -07:00
Nikolaj Bjorner ec565ae7a0 fixes to #596 and #592: use exponential step increments on integer problems, align int.to.str with canonizer and disequality checker 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2016-05-17 01:00:42 -07:00
Nikolaj Bjorner 3d7eb12117 tracking use of assumptions in tactics 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2016-03-09 21:33:08 -08:00
Ken McMillan 51aa10821e fixed pop issue and interpolation proof mode issue 2014-08-26 13:46:53 -07:00
Leonardo de Moura 8198e62cbd solver factories, cleanup solver API, simplified strategic solver, added combined solver 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2012-12-11 17:47:27 -08:00
Leonardo de Moura 8d6a091083 fixed bugs found in regression tests 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2012-11-07 07:36:40 -08:00
Leonardo de Moura e2f6a65aa2 added support for named assertions 2012-11-02 14:00:43 -07:00
Leonardo de Moura e1eb3ee8ee fixed bug in solver_na2as 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2012-11-02 11:36:59 -07:00
Leonardo de Moura 33c165490c fixed solver_na2as 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2012-11-02 09:43:07 -07:00
Leonardo de Moura d545f187f8 working on named assertions support 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
 2012-11-02 08:28:34 -07:00