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add backtracking conquer

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-04-14 15:34:33 -07:00
parent d58a9d2528
commit 252fb4af6e
6 changed files with 192 additions and 153 deletions
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5
src/sat/sat_params.pyg
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@ -24,6 +24,7 @@ def_module_params('sat',
('gc.small_lbd', UINT, 3, 'learned clauses with small LBD are never deleted (only used in dyn_psm)'),
('gc.k', UINT, 7, 'learned clauses that are inactive for k gc rounds are permanently deleted (only used in dyn_psm)'),
('gc.burst', BOOL, True, 'perform eager garbage collection during initialization'),
('simplify.delay', UINT, 0, 'set initial delay of simplification by a conflict count'),
('minimize_lemmas', BOOL, True, 'minimize learned clauses'),
('dyn_sub_res', BOOL, True, 'dynamic subsumption resolution for minimizing learned clauses'),
('core.minimize', BOOL, False, 'minimize computed core'),
@ -42,9 +43,9 @@ def_module_params('sat',
('local_search_mode', SYMBOL, 'wsat', 'local search algorithm, either default wsat or qsat'),
('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.cutoff', SYMBOL, 'depth', '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.'),
('lookahead.cube.depth', UINT, 1, 'cut-off depth to create cubes. Used when lookahead.cube.cutoff is depth.'),
('lookahead.cube.freevars', DOUBLE, 0.8, 'cube free fariable fraction. Used when lookahead.cube.cutoff is freevars'),
('lookahead.cube.psat.var_exp', DOUBLE, 1, 'free variable exponent for PSAT cutoff'),
('lookahead.cube.psat.clause_base', DOUBLE, 2, 'clause base for PSAT cutoff'),