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SLS #192

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SLS #192

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shnarazk
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@shnarazk shnarazk commented Oct 11, 2022 •
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  • main objective: Stochastic Local Search in Splr #159
  • side effect: 'reluctant', memory pressure based reduction = delete a clause $C$ if $$A_{1} \times (\overline{LBD} + \overline{entanglement})^{0.5} + A_{2}\times|database|^{-0.5} < LBD_{C}$$
  • side effect: Luby reinitialization

base line

$ sat-bench splr-016
# 0.14.1, timeout:2000 on demorgan @ 2022-10-02T09:11:15
# ~/.cargo/bin/splr-016 (0.16.3) @ 2022-09-16T22:26:35
solver,       num,                       target,     time
"splr-016",     1,                 "UF250(100)",   61.353
"splr-016",     2,                "UUF250(100)",  197.929
"splr-016",     3,   "3SAT/360  S722433227-030",  169.532
"splr-016",     4,   "3SAT/360 S2032263657-035",    2.434
"splr-016",     5,   "3SAT/360  S368632549-051",    2.459
"splr-016",     6,   "3SAT/360 S1684547485-073",   12.344
"splr-016",     7,   "3SAT/360 S1711406314-093",   19.522
"splr-016",     8,   "3UNS/360 S1369720750-015",  172.912
"splr-016",     9,   "3UNS/360  S367138237-029",  617.952
"splr-016",    10,   "3UNS/360  S680239195-053",  259.947
"splr-016",    11,   "3UNS/360  S253750560-086",  194.485
"splr-016",    12,   "3UNS/360 S1028159446-096",  253.592
"splr-016",    13,   "[SAT] SR2015/m283,  3553",   46.279
"splr-016",    14,   "[SAT] SR2015/38b,    448",   58.293
"splr-016",    15,   "[SAT] SR2015/44b,    609",   86.086
"splr-016",    16,   "[SAT] SC21/b04_s_unknown",   90.473
"splr-016",    17,   "[SAT] SC21/quad_r21_m22 ",   49.054
"splr-016",    18,   "[SAT] SC21/toughsat_895s",  146.428
"splr-016",    19,   "[UNS] SC21/assoc_mult_e3",  224.545
"splr-016",    20,   "[UNS] SC21/dist4.c      ",  279.228
"splr-016",    21,   "[UNS] SC21/p01_lb_05    ",  237.824
"splr-016",    22,   "[UNS] SC21/shift1add    ",   22.143
med:   118.451, max:   617.952,           total: 3204.814

@shnarazk shnarazk self-assigned this Oct 11, 2022
@shnarazk shnarazk mentioned this pull request Oct 11, 2022
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@shnarazk shnarazk linked an issue Oct 11, 2022 that may be closed by this pull request
Stochastic Local Search in Splr #159
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@shnarazk shnarazk added the new scheme import some idea on papers label Oct 11, 2022
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$ sat-bench splr
# 0.14.2, timeout:2000 on demorgan @ 2022-10-19T07:15:48
# ~/.cargo/bin/splr (0.17.0-alpha.3) @ 2022-10-18T23:16:14
solver,       num,                       target,     time
"splr",         1,                 "UF250(100)",  100.086
"splr",         2,                "UUF250(100)",  252.458
"splr",         3,   "3SAT/360  S722433227-030",   16.210
"splr",         4,   "3SAT/360 S2032263657-035",    3.162
"splr",         5,   "3SAT/360  S368632549-051",  419.085
"splr",         6,   "3SAT/360 S1684547485-073",   20.101
"splr",         7,   "3SAT/360 S1711406314-093",    5.807
"splr",         8,   "3UNS/360 S1369720750-015",  198.255
"splr",         9,   "3UNS/360  S367138237-029",  469.281
"splr",        10,   "3UNS/360  S680239195-053",  210.391
"splr",        11,   "3UNS/360  S253750560-086",  177.642
"splr",        12,   "3UNS/360 S1028159446-096",  187.147
"splr",        13,   "[SAT] SR2015/m283,  3553",   41.761
"splr",        14,   "[SAT] SR2015/38b,    448",   37.090
"splr",        15,   "[SAT] SR2015/44b,    609",  259.361
"splr",        16,   "[SAT] SC21/b04_s_unknown",  276.338
"splr",        17,   "[SAT] SC21/quad_r21_m22 ",  190.516
"splr",        18,   "[SAT] SC21/toughsat_895s",  437.878
"splr",        19,   "[UNS] SC21/assoc_mult_e3",  142.669
"splr",        20,   "[UNS] SC21/dist4.c      ",  268.590
"splr",        21,   "[UNS] SC21/p01_lb_05    ",  291.744
"splr",        22,   "[UNS] SC21/shift1add    ",   80.216
med:   188.832, max:   469.281,           total: 4085.788
# ~/Repositories/splr@10-19T07:45:44 7e3ebf68@20221011-SLS*

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shnarazk commented Oct 19, 2022 •
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greedy DB

--- a/src/cdb/db.rs
+++ b/src/cdb/db.rs
@@ -1025,7 +1025,9 @@ impl ClauseDBIF for ClauseDB {
         // there're exception. Since this is the pre-stage of clause vivification,
         // we want keep usefull clauses as many as possible.
         // Therefore I save the clauses which will become vivification targets.
-        let thr = (self.lb_entanglement.get_slow() + 1.0).min(self.lbd.get_fast().max(5.0)) as u16;
+        // let thr = (self.lb_entanglement.get_slow() + 1.0).min(self.lbd.get_fast().max(5.0)) as u16;
+        let extra = 100.0 / (self.num_learnt as f64).log2();
+        let thr = ((self.lb_entanglement.get_slow() + self.lbd.get_slow()).log2() + extra) as u16;
         for i in &perm[keep..] {
# 0.14.2, timeout:2000 on demorgan @ 2022-10-19T17:22:03
# ~/.cargo/bin/splr (0.17.0-alpha.3) @ 2022-10-19T14:07:39
solver,       num,                       target,     time
"splr",         1,                 "UF250(100)",   89.492
"splr",         2,                "UUF250(100)",  251.203
"splr",         3,   "3SAT/360  S722433227-030",    5.085
"splr",         4,   "3SAT/360 S2032263657-035",    2.559
"splr",         5,   "3SAT/360  S368632549-051",   84.813
"splr",         6,   "3SAT/360 S1684547485-073",    0.858
"splr",         7,   "3SAT/360 S1711406314-093",   35.819
"splr",         8,   "3UNS/360 S1369720750-015",  173.099
"splr",         9,   "3UNS/360  S367138237-029",  471.490
"splr",        10,   "3UNS/360  S680239195-053",  199.083
"splr",        11,   "3UNS/360  S253750560-086",  171.898
"splr",        12,   "3UNS/360 S1028159446-096",  170.747
"splr",        13,   "[SAT] SR2015/m283,  3553",    8.103
"splr",        14,   "[SAT] SR2015/38b,    448",   31.943
"splr",        15,   "[SAT] SR2015/44b,    609",  328.733
"splr",        16,   "[SAT] SC21/b04_s_unknown",  213.892
"splr",        17,   "[SAT] SC21/quad_r21_m22 ",  198.397
"splr",        18,   "[SAT] SC21/toughsat_895s",  353.960
"splr",        19,   "[UNS] SC21/assoc_mult_e3",  158.588
"splr",        20,   "[UNS] SC21/dist4.c      ",  244.254
"splr",        21,   "[UNS] SC21/p01_lb_05    ",  307.361
"splr",        22,   "[UNS] SC21/shift1add    ",   56.706
med:   171.322, max:   471.490,           total: 3558.083
# ~/Repositories/splr@10-19T17:42:37 09a1739f@20221011-SLS*

@shnarazk shnarazk added the idea My original idea label Oct 20, 2022
@shnarazk shnarazk closed this Nov 2, 2022
shnarazk added a commit that referenced this pull request Jan 30, 2023
@shnarazk
Splr-0.17.0 (#185)
89ce01a 
- fix #188 
- feature 'reward_annealing' #187
- `Certificate` handles empty clauses correctly #191 
- fix stage calculations #194 
- a better clause reduction #195
- SolverError::OutOfRange -> SolverError::InvalidLiteral #198 
- SLS #159 #192 #199
- fix a build error without feature 'trail_saving' #202
- fix a build error without feature 'rephase' #205 
- two-mode reduction (#208)
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Stochastic Local Search in Splr
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