704dc9375d
mini_ic3: fix generalize() returning empty/init-overlapping core ( #9245 )
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Two fixes in examples/python/mini_ic3.py:
1. generalize(): the polarity of the disjointness check was inverted,
and there was no guard against an empty unsat core. With an empty
core, And([])=True so check_disjoint(init, prev(True)) is always
False (init is sat), and the code returned the empty core. That
empty core then became cube2clause([])=Or([])=False, which got
added as a lemma to all frames. The frame became inconsistent and
is_valid() returned And(Or())=False as the "inductive invariant".
Fix: require len(core) > 0 AND check_disjoint(init, prev(core))
(without the spurious 'not'), so the core is only used when it
is genuinely disjoint from init.
2. is_transition(): when an init rule's body happens to be an And
without any Invariant predicate (e.g. (and (not A) (not B) ...)),
is_body() returns (And(...), None). is_transition then passed
inv0=None to subst_vars() which crashed inside get_vars(). Add an
explicit None check so the rule falls through to is_init().
Verified on horn1..5 (unchanged behavior), h_CRC and h_FIFO from the
blocksys benchmarks (now correctly return CEX matching z3 spacer),
and cache_coherence_three (no longer collapses to (and or)).
2026-04-09 02:01:07 -07:00
53f89a81c1
Fix some typos. ( #7115 )
2024-02-07 23:06:43 -08:00
ebe5ebf0ae
Add branch and bound solver, for fun
2023-12-23 11:58:29 -08:00
4fe423482a
bugfix on slack
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2023-12-21 15:36:26 -08:00
ae1d9270b5
improve add bin/item functions
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2023-12-21 15:27:11 -08:00
b09c237775
rudimentary bin cover solver using the user propagator
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2023-12-21 15:18:26 -08:00
f6595c161f
add examples with proof replay
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2022-10-19 17:43:56 -07:00
88d10f7fe4
add example for monitoring proof logs
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2022-10-19 13:37:51 -07:00
791ca02ab1
formula simplification example
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2022-08-11 09:33:36 +03:00
dd46224a1d
use structured proof hints
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2022-05-28 09:37:41 -07:00
a5d588ce09
add example for #5933
2022-04-05 04:26:40 +02:00
053cb72cc2
handle return status
2022-04-04 20:19:15 +02:00
4f6811a6a2
with simplification
2022-04-03 21:10:53 -07:00
53f72d9cbe
updated mini
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2022-01-26 15:44:49 -08:00
cbdd7b0696
three smt2 examples added and one python example updated ( #5690 )
2021-12-01 16:21:12 -08:00
b5deba8426
add EFSMT solving example ( #5654 )
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Co-authored-by: rainoftime <rainoftime@gmail.com >
2021-11-09 11:05:10 -08:00
a1b036a4fa
Update README.md
2021-04-25 17:02:34 -07:00
3ff5d4226a
Update README.md
2021-04-25 16:59:53 -07:00
a52b485d9c
marco: immediately shrink to core if not subset ( #5203 )
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Small improvement, found while translating it in another system
2021-04-20 12:29:52 -07:00
7fab0f5923
updated experiment
2021-03-26 14:58:23 -07:00
7eceeff349
move branch of unit variable
2021-03-08 10:09:04 -08:00
3c26a965e1
updated script, add comment to mk_eq_empty
2021-03-07 06:59:58 -08:00
8de96009cd
na
2021-03-06 12:36:19 -08:00
8d54e83567
updated hitting set sample
2021-03-06 10:18:52 -08:00
022a1fd3dd
fix #5080 assertion is violated on legal input, add an example
2021-03-05 15:01:39 -08:00
1bb9a02160
travis timeouts
2021-02-21 13:13:19 +00:00
785fab74f4
Create bubble_sort.py ( #4976 )
2021-01-26 09:42:17 -08:00
bb9cd5dd49
Ensure that the 'OUTPUT' locations in CMake for Python examples is accurate ( #4499 )
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Signed-off-by: Andrew V. Jones <andrew.jones@vector.com >
2020-06-04 15:04:01 -07:00
0edd587e5a
Fix typos in examples.
2019-08-14 22:00:50 -07:00
807095a344
fix #2375
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-07-03 10:04:00 +07:00
e5dffeace4
fix #2365
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-30 08:40:41 +03:00
b4bbe12ca1
set kernel to 3
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-11 10:41:51 -07:00
7bfb730fee
fix traffic jam
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-10 17:45:55 -07:00
b4daf8dcd8
adding advanced port
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-10 12:33:20 -07:00
9f426443ca
saving strategies tutorial from notebooks.azure.com
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-10 10:30:11 -07:00
6cd7169665
readme and link
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-09 11:10:35 -07:00
2861b10d58
update
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-08 09:26:15 -07:00
08528b3526
ported guide
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-08 09:20:55 -07:00
36e03db0f3
png
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-07 19:29:14 -07:00
e0a49dd556
html pages for z3 python tutorial
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-06-07 19:14:54 -07:00
167f968fa8
Change from BINARY_DIR to PROJECT_BINARY_DIR
2019-05-15 11:25:40 -07:00
56ac3f86a5
fix justification for implied equalities in special relations
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2019-04-03 17:08:10 -07:00
2f0d2ec385
PYTHON_PATH should say PYTHONPATH.
2019-01-18 16:18:16 -08:00
19471f9fa3
Implement mini_quip
2019-01-04 18:30:02 -05:00
83e3a79bd1
Remove testcase that takes long time to finish
2019-01-04 17:31:47 -05:00
4b29b208ad
Add few more testcases
2018-12-28 13:28:15 -05:00
300e99b67a
Make sure init is included when generalize
2018-12-28 13:21:40 -05:00
b083c7546e
Substitue Vars in queries
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Replace Vars that are representing primary inputs as "i#" when query
solvers.
2018-12-28 13:21:35 -05:00
f591e0948a
fix #1841
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2018-11-22 15:28:33 -08:00
498fa87993
seq rewriting fixes
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com >
2018-11-22 10:48:49 -08:00
Guangyu (Gary) HU