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515 commits

Author SHA1 Message Date
Nikolaj Bjorner
e2f4fc2307 overhaul of proof format for new solver 
This commit overhauls the proof format (in development) for the new core.

NOTE: this functionality is work in progress with a long way to go.
It is shielded by the sat.euf option, which is off by default and in pre-release state.
It is too early to fuzz or use it. It is pushed into master to shed light on road-map for certifying inferences of sat.euf.

It retires the ad-hoc extension of DRUP used by the SAT solver.
Instead it relies on SMT with ad-hoc extensions for proof terms.
It adds the following commands (consumed by proof_cmds.cpp):

- assume  - for input clauses
- learn   - when a clause is learned (or redundant clause is added)
- del     - when a clause is deleted.

The commands take a list of expressions of type Bool and the
last argument can optionally be of type Proof.
When the last argument is of type Proof it is provided as a hint
to justify the learned clause.

Proof hints can be checked using a self-contained proof
checker. The sat/smt/euf_proof_checker.h class provides
a plugin dispatcher for checkers.
It is instantiated with a checker for arithmetic lemmas,
so far for Farkas proofs.

Use example:
```
(set-option :sat.euf true)
(set-option :tactic.default_tactic smt)
(set-option :sat.smt.proof f.proof)
(declare-const x Int)
(declare-const y Int)
(declare-const z Int)
(declare-const u Int)
(assert (< x y))
(assert (< y z))
(assert (< z x))
(check-sat)
```

Run z3 on a file with above content.
Then run z3 on f.proof

```
(verified-smt)
(verified-smt)
(verified-smt)
(verified-farkas)
(verified-smt)
```
 2022-08-28 17:44:33 -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
8e167aa213 #6116 
fix unsoundness issue due to book-keeping changes for whether the solver uses assumptions.
 2022-08-18 03:58:06 -07:00
Nikolaj Bjorner
61f5489223 fix #6107 2022-06-27 16:53:18 -07:00
Clemens Eisenhofer
2fa60aa43c
Added function to select the next variable to split on (User-Propagator) (#6096) 
* Added function to select the next variable to split on

* Fixed typo

* Small fixes

* uint -> int
 2022-06-19 10:49:25 -07:00
Nikolaj Bjorner
25ad5cb073 prepare ground for drup trim 
By not deleting justifications in base level unit literals it is possible for drup-trim to inspect the trail for dependencies - which clauses were used to derive a literal.
 2022-06-14 09:51:06 -07:00
Nikolaj Bjorner
5db133f875 add a way to supress lambdas 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-06-10 14:35:20 -07:00
Nikolaj Bjorner
3cc9d7f443 improve pre-processing 2022-04-15 12:55:26 +02:00
Nikolaj Bjorner
a634876180 sort muxes 2022-04-15 12:55:26 +02:00
Nikolaj Bjorner
405a26c585 allow adding constraints during on_model 2022-04-09 09:55:02 +02:00
Nikolaj Bjorner
6d836e7e2f expose model update 2022-03-19 09:23:08 -07:00
Nikolaj Bjorner
1e0d49512b call mux finder 2022-01-31 12:00:16 -08:00
Nikolaj Bjorner
d777306bb6 #5778 2022-01-17 10:43:15 -08:00
Nikolaj Bjorner
ea93345b75 #5777 2022-01-16 10:52:25 -08:00
Nikolaj Bjorner
8e3185ffe3 remove dual solver approach 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2022-01-03 14:08:01 -08:00
Nikolaj Bjorner
2944449884 #5641 2022-01-03 11:12:09 -08:00
Nikolaj Bjorner
d50bfc6a50 #5641 2021-11-25 18:01:35 +01:00
Henrich Lauko
96671cfc73
Add and fix a few general compiler warnings. (#5628) 
* rewriter: fix unused variable warnings

* cmake: make missing non-virtual dtors error

* treewide: add missing virtual destructors

* cmake: add a few more checks

* api: add missing virtual destructor to user_propagator_base

* examples: compile cpp example with compiler warnings

* model: fix unused variable warnings

* rewriter: fix logical-op-parentheses warnings

* sat: fix unused variable warnings

* smt: fix unused variable warnings
 2021-10-29 15:42:32 +02:00
Nikolaj Bjorner
b016465ad2 #5454 2021-08-11 20:31:53 -07:00
Nikolaj Bjorner
46107022f7 #5454 2021-08-11 17:06:42 -07:00
Nikolaj Bjorner
f3f83d0445 #5429 2021-07-30 13:43:02 -07:00
Nikolaj Bjorner
ed49c1eae3 #5324 2021-06-06 15:14:38 -07:00
Nikolaj Bjorner
c388d99c35 #5324 2021-06-06 10:58:47 -07:00
Nikolaj Bjorner
fb75dac63f #5223 2021-05-31 12:01:33 -07:00
Nikolaj Bjorner
30e904bfa4 disable threads for extensions 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-04-27 21:46:56 -07:00
Nikolaj Bjorner
892e6d9ed5 build 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2021-04-14 05:06:46 -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
38737db802 fixes and more porting seq_eq_solver to self-contained module 2021-03-04 16:23:22 -08:00
Nikolaj Bjorner
69070a7486 align translation cache with scopes and variable elimination 2021-03-03 11:22:17 -08:00
Nikolaj Bjorner
13f05ae9dc enable wcnf output for weighted maxsat problems 2021-02-28 09:59:36 -08:00
Nikolaj Bjorner
083d09aa81 fix #5016 2021-02-14 13:52:10 -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
0ec567fe15 integrate v2 of lns 2021-02-04 15:47:40 -08:00
Nikolaj Bjorner
4455f6caf8 move to get_sort as method, add opt_lns pass, disable xor simplification unless configured, fix perf bug in model converter update trail 2021-02-02 03:58:19 -08:00
Nikolaj Bjorner
b87405cc92 tune user-pop 2021-01-18 16:51:34 -08:00
Nikolaj Bjorner
374ae52d70 testing mbi 2020-12-26 13:49:59 -08:00
Nikolaj Bjorner
12198d13ac fix #4794 2020-12-02 12:24:35 -08:00
Nikolaj Bjorner
9f34af5e18 update justifications only at level 0 2020-11-20 11:12:55 -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
a764d528a1 'clean 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-10-30 13:14:48 -07:00
Pierre Bouvier
24321e311b
Add support of the SunOS platform (Solaris, OpenSolaris, OpenIndiana) (#4757) 
* Add support of the SunOS plateform (OpenSolaris, OpenIndiana) in scripts/mk_util.py

* Add missing casts for the SunOS plateform (OpenSolaris, OpenIndiana) for the pow function
 2020-10-27 11:39:21 -07:00
Nikolaj Bjorner
8d76470a8a fixes to mostly solver arith/euf and backtracking scopes 2020-10-26 11:06:41 -07:00
Nikolaj Bjorner
72d407a49f
mbp (#4741) 
* 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

* add projection

* na

* na

* na

* na

* na

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

* deps

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

* testing arith/q

* na

* newline for model printing

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-10-21 15:48:40 -07:00
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
367e5fdd52
delay internalize (#4714) 
* adding array solver

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

* use default in model construction

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

* debug delay internalization

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

* bv

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

* arrays

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

* get rid of implied values and bounds

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

* redo egraph

* remove out

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

* remove files

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-28 19:24:16 -07:00
Nikolaj Bjorner
b7ec4489a6
bv fixes and tuning (#4703) 
* heap size information

* bv tuning

* fix #4701

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

* throw on set-has-size #4700

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-21 19:54:53 -07:00
Nikolaj Bjorner
6f63f8761c
optimizations to bv-solver and euf-egraph (#4698) 
* additional bit-vector propagators

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

* rename restrict (not a keyword, but well) #4694, tune euf

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

* merge

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

* add pb rewriting to pb2bv #4697

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-20 06:47:27 -07:00
Nikolaj Bjorner
8691ef1d4d
additional bit-vector propagators (#4695) 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-18 12:38:29 -07:00
Nikolaj Bjorner
549753845e
bv and gc of literals (#4692) 
* bv and gc of literals

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

* overload

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

* diseq

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

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-17 14:24:07 -07:00
Nikolaj Bjorner
2328a6e839 add a way to use new smt core for selected logics 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
 2020-09-14 10:43:52 -07:00