Nikolaj Bjorner
8e3185ffe3
remove dual solver approach
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2022-01-03 14:08:01 -08:00
Nikolaj Bjorner
a71aa113e0
#5641
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2022-01-02 19:36:17 -08:00
Nikolaj Bjorner
8245935d41
#5641 add handlers for basic set operations to euf=true
2022-01-01 20:33:17 -08:00
Nikolaj Bjorner
9d3c8a6a2f
na
2022-01-01 17:59:31 -08:00
Nikolaj Bjorner
42219204ed
sketch replace_all
2022-01-01 17:39:37 -08:00
Nikolaj Bjorner
84f514a4f4
throttle ackerman on arrays
2022-01-01 15:33:33 -08:00
Nikolaj Bjorner
aa901c4e88
axiom solver improvements
2021-12-31 11:53:40 -08:00
Nikolaj Bjorner
fc77345bec
breaking change. Enforce append semantics everywhere for parameter updates #5744
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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
e8833f4dac
working on relevancy=3
2021-12-30 17:07:14 -08:00
Nikolaj Bjorner
b87b464e69
set relevancy flag on enode
2021-12-29 17:57:28 -08:00
Nikolaj Bjorner
28bce8f09c
working on relevant
2021-12-28 11:00:02 -08:00
Margus Veanes
5afb95b34a
improved subset checking for regexes with counters ( #5731 )
2021-12-22 17:53:34 -08:00
Nikolaj Bjorner
cf6486f990
bug in flatten/and/or introduced when skipping sub-expressions
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-12-22 07:43:37 -08:00
Margus Veanes
1d9aad6ea9
improved regex merging avoiding unsat nontermination ( #5728 )
2021-12-20 17:44:06 -08:00
Nikolaj Bjorner
f01d096fb5
fix again
2021-12-20 09:51:15 -08:00
Nikolaj Bjorner
ad91748b5f
Merge branch 'master' of https://github.com/z3prover/z3
2021-12-20 09:21:53 -08:00
Nikolaj Bjorner
83b47f1859
fix #5726
2021-12-20 09:21:40 -08:00
Margus Veanes
be38b256c8
fixed bug in is_char_const_range ( #5724 )
2021-12-19 17:46:42 -08:00
Margus Veanes
25d54ebb40
fixing regression of issue 1224 ( #5723 )
2021-12-19 14:07:53 -08:00
Margus Veanes
a7b1db611c
State graph dgml update and fixes in condition simplifier ( #5721 )
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* improved generated dgml graph
* fixed simplification of negated ranges and did some code cleanup
* do not make loops with lower=upper=0, this is epsilon
* do not add loops with lower=upper=1
* bug fix in normalization: forgotten eps case
2021-12-19 11:09:55 -08:00
Nikolaj Bjorner
4856581b68
na
2021-12-17 16:40:19 -08:00
Nikolaj Bjorner
8ca023d541
expose propagate created
2021-12-17 16:12:47 -08:00
Nikolaj Bjorner
e1ffaa7faf
na
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-12-17 11:34:57 -08:00
Nikolaj Bjorner
6963451704
na
2021-12-16 20:13:29 -08:00
Nikolaj Bjorner
5974200444
fixes to previous push and streamlining
2021-12-16 20:06:49 -08:00
Nikolaj Bjorner
4e82a9af5f
pin expressions
2021-12-16 19:41:32 -08:00
Margus Veanes
a288f9048a
Update regex union and intersection to maintain ANF ( #5717 )
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* added merge for unions and intersections
* added normalization rules to ensure ANF
* fixing PR comments related to merge
2021-12-16 19:19:36 -08:00
Nikolaj Bjorner
a099972354
fix #5714
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It is not unlike other fuzz bugs: it exercises some behavior that applications are unlikely to expose. In this case, a rule body expanded into a conjunction with more than 1M formulas (with a lot of repetition). The original rule representation assumed silently that the number of constraints in a body would fit within 20 bits, but reality allowed bodies with as many as 2^{32} - 1 constraints.
So "minimizing" the bug as @agurfinkel asks for seems not to make too much sense.
Just running the samples in debug mode points to the root cause.
Since fuzz bugs are not from applications and fuzz tools have the potential for creating a large number of issues, I find it reasonable to push some basic pro-active asks on filers:
- reproduce bug in debug builds to assess whether a debug assert triggers.
- minimize or keep it simpler when possible (in this case it does not apply)
- perform basic diagnostics/triage. I am basically asking to push this part of the work on to the fuzzer. Otherwise, addressing random bugs doesn't scale. Triaging should have pointed to the root cause.
Now, there tends to be something to learn from bugs. In this case, the question was: "can we avoid constraints with duplications"? In particular, it points to a basic inefficiency of extracting conjunctions (and disjunctions). The function didn't deduplicate. So I added deduplication into this function. It is used throughout z3 code base so could expose latent issues. We will see.
2021-12-16 10:20:53 -08:00
Margus Veanes
2be93870c8
Cleanup regex info and some fixes in Derivative code ( #5709 )
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* removed unused regex info fields
* cleanup of info and fixes in antimirov derivatives
* removed extra qualification on operator
2021-12-15 10:59:34 -08:00
Nikolaj Bjorner
03b5380a20
na
2021-12-14 13:39:52 -08:00
Nikolaj Bjorner
b1d167de5b
fix co-factoring'
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-12-14 10:12:38 -08:00
Nikolaj Bjorner
f40becf099
remove case for non-emptiness to combine with standard membership
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as part of revising engine for addressing #5693
2021-12-13 18:17:40 -08:00
Nikolaj Bjorner
96e871c826
add stub for testing updates to scoped_timer
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-12-12 12:31:23 -08:00
Nikolaj Bjorner
51fa40ece5
fix spelling
2021-12-09 10:23:37 -08:00
Nikolaj Bjorner
e45ae32685
unsound equality propagation #5676
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-12-08 09:02:05 -08:00
Nikolaj Bjorner
a5bd115235
replace_re axiom placeholder
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@ahelwer - illustrates placeholder for one approach for axiomatizing replace_re
2021-12-08 03:40:24 -08:00
Nikolaj Bjorner
87aec8819f
fix #5687
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-12-01 10:08:29 -08:00
Nikolaj Bjorner
c083aa82ee
add debug information in user-propagate #5687
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-11-29 08:59:53 -08:00
Nikolaj Bjorner
d50bfc6a50
#5641
2021-11-25 18:01:35 +01:00
Nikolaj Bjorner
e8f5a29c31
fix #5679
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-11-22 19:37:10 +01:00
Nikolaj Bjorner
518ef9f916
fix #5674
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2021-11-18 21:14:50 -08:00
Nikolaj Bjorner
b28a8013fe
#5653
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fix performance bottleneck in static features
2021-11-11 13:30:38 -08:00
Henrich Lauko
96671cfc73
Add and fix a few general compiler warnings. ( #5628 )
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* 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
Margus Veanes
efcad5ff35
fixed nullability bug in the if-then-else info ( #5620 )
2021-10-26 09:11:07 +02:00
Nikolaj Bjorner
bc2020a39b
#5604
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retain array interpretation when available
2021-10-17 20:24:26 -07:00
Margus Veanes
f78546cd7c
fixed bug of computing butlast of a sequence ( #5602 )
2021-10-15 18:02:51 -07:00
Nikolaj Bjorner
fb9fa1b7d2
updated printer
2021-10-15 17:56:54 -07:00
Margus Veanes
cb120c93f4
Regex range bug fix ( #5601 )
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* added a missing derivative case for nonground range
* further missing cases and a bug fix in re.to_str
2021-10-15 15:30:55 -07:00
Nikolaj Bjorner
c15968aa9e
fix #4901
2021-10-12 17:10:04 -07:00
Nikolaj Bjorner
9a76bf0aa2
#5591
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nth issue
2021-10-12 13:59:28 -07:00
