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add unit walk engine

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-12-17 16:09:07 -08:00
parent 5adfae0fa8
commit a5b663c52d
16 changed files with 604 additions and 47 deletions
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2
src/sat/sat_params.pyg
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@ -38,6 +38,8 @@ def_module_params('sat',
('atmost1_encoding', SYMBOL, 'grouped', 'encoding used for at-most-1 constraints grouped, bimander, ordered'),
('local_search', BOOL, False, 'use local search instead of CDCL'),
('local_search_threads', UINT, 0, 'number of local search threads to find satisfiable solution'),
('unit_walk', BOOL, False, 'use unit-walk search instead of CDCL'),
('unit_walk_threads', UINT, 0, 'number of unit-walk search threads to find satisfiable solution'),
('lookahead.cube.cutoff', SYMBOL, 'adaptive_freevars', 'cutoff type used to create lookahead cubes: depth, freevars, psat, adaptive_freevars, adaptive_psat'),
('lookahead.cube.fraction', DOUBLE, 0.4, 'adaptive fraction to create lookahead cubes. Used when lookahead.cube.cutoff is adaptive_freevars or adaptive_psat'),
('lookahead.cube.depth', UINT, 10, 'cut-off depth to create cubes. Used when lookahead.cube.cutoff is depth.'),