Nikolaj Bjorner
9fc4015c46
remove ternary clause optimization
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Removing ternary clause optimization from sat_solver simplifies special case handling of ternary clauses throughout the sat solver and dependent solvers (pb_solver). Benchmarking on QF_BV suggests the ternary clause optimization does not have any effect. While removing ternary clause optimization two bugs in unit propagation were also uncovered: it missed propagations when the only a single undef literal remained in the non-watched literals and it did not update blocked literals in cases where it could in the watch list. These performance bugs were for general clauses, ternary clause propagation did not miss propagations (and don't use blocked literals), but fixing these issues for general clauses appear to have made ternary clause optimization irrelevant based on what was measured.
2022-10-30 03:57:39 -07:00
Nikolaj Bjorner
fe1b4bf5ce
disable ternary, fixes to propagation, make bv_rewrites for multiplier n-ary
2022-10-26 23:44:38 -07:00
Nikolaj Bjorner
4c799c144a
fix gc to not remove ternary clauses that are on assignment trail. This addresses issue with drat proofs that don't pass drat-trim due to deletion during gc, but use in conflicts
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2019-02-22 11:14:20 +01:00
Nikolaj Bjorner
93ee05648e
add shortcuts for unit assertions, conflicts
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2019-02-11 10:56:36 -08:00
Nikolaj Bjorner
43441d0fd5
add LP parser option to front-end and opt context
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2018-02-06 14:02:44 -08:00
Nikolaj Bjorner
2739342aba
fix updates to cce
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2018-01-30 23:41:04 -08:00
Nikolaj Bjorner
ede12553f2
fix learned annotation on ternary
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2018-01-30 03:31:28 -08:00
Nikolaj Bjorner
a5b663c52d
add unit walk engine
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-12-17 16:09:07 -08:00
Nikolaj Bjorner
71c52396cb
fix transitive reduction bug, eliminate blocked tag on binary clauses, separate BIG structure from scc
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-12-13 02:38:06 -08:00
Nikolaj Bjorner
a6da207b65
fix crash bugs in sat solver
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-11-11 11:25:43 -08:00
Nikolaj Bjorner
651587ce01
merge with master branch
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-09-19 09:39:22 -07:00
Nikolaj Bjorner
b19f94ae5b
make include paths uniformly use path relative to src. #534
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-07-31 13:24:11 -07:00
Nikolaj Bjorner
bcf0ee7709
n/a
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-06-29 18:53:58 -07:00
Nikolaj Bjorner
c3d29e75ef
adding in-processing
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-06-24 18:27:32 -07:00
Nikolaj Bjorner
2afd45b3c2
working on lookahead
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2017-03-27 04:53:27 +02:00
Leonardo de Moura
c66b9ab615
Reorganizing the code
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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2012-10-20 15:30:42 -07:00
