Stages that control activity, elimination, reduction, restart, trail-saving and vivification #163
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shnarazk
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…against problems with small N
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Mar 5, 2022
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after changing trail_saving, lbd_of_dq
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* Cargo.toml: disable "dynamci_restart_threshold" temporally * All generated clauses are supposed to be killed unless ... * splr-ema: version 0.1.1; add `EmaIF::set_value` and `Ema::with_value` * (search) fix type * (trail_saving.rs) parameter tuning * a bad direction * quick fix * (Eliminator::eliminate_combination_limit) delete and define as a local constant * renamed: src/processor/eliminator.rs -> src/processor/simplify.rs * rename 'lbd of dp' to 'literal block entanglement' * move Restarter::lbd to ClauseDB * move Restarter::asg to AssignStack as `assign_rate` * splr-ema::Ewa2: add a cache field to hold `1.0 - decay` * restart.rs: reorganize `cfg(feature = "Luby_restart")` * remove meaningless dereference of `as_view` * tweak the initial values of `AssignStack::level` to set valid values to given clauses * increase `ClauseDB:;lbd` when a new assignment is found * update the initial value of `rst_lbd_thr` based on experimentation * increase `ClauseDB:;lbd` when a new assignment is found (part 2) * cargo test
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Experiment on stage reduction rate, based on ec7f4c0
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trail refinement
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Survey on stage-based var activity compression
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* a new branch ditch-fast-EMA-20220226 * (types.rs) add `EEA` * silly typo * rename EWA to Ewa * (types.rs) add `Ewa2` * add splr-ema crate * tiny change; ready to comparison * tweak history lengths; comment out fast EMA settings * Stages that control activity, elimination, reduction, restart, trail-saving and vivification (#163) * (reduce) implement dynamic reduction rate * tweak processor parameters * +Luby reduction * keep very small learnt clauses after clause reduction * (search) rename local variables * the best * probably better setting * refactored and tweak parameters * add splr-luby * use splr_luby * ditto * select reduction targets based on Luby stabilization span; very fast against problems with small N * new file: src/solver/stage.rs; introduce StageManager * splr-luby/src/lib.rs: add more methods * refactor StageManager and State * (reduce) revert some changes * (RestartIF) s/set_stabilization/set_sensibility/ * tiny refactor * (search) tiny changes * (search) StageManager controls simplify invocation directly * types.rs export SolverEvent; implement Instantiate for StageManager * (StageManager) s/threshold/end_of_stage/ * (StageManager) reorganize local names * more refactoring (#164) * Cargo.toml: disable "dynamci_restart_threshold" temporally * All generated clauses are supposed to be killed unless ... * splr-ema: version 0.1.1; add `EmaIF::set_value` and `Ema::with_value` * (search) fix type * (trail_saving.rs) parameter tuning * a bad direction * quick fix * (Eliminator::eliminate_combination_limit) delete and define as a local constant * renamed: src/processor/eliminator.rs -> src/processor/simplify.rs * rename 'lbd of dp' to 'literal block entanglement' * move Restarter::lbd to ClauseDB * move Restarter::asg to AssignStack as `assign_rate` * splr-ema::Ewa2: add a cache field to hold `1.0 - decay` * restart.rs: reorganize `cfg(feature = "Luby_restart")` * remove meaningless dereference of `as_view` * tweak the initial values of `AssignStack::level` to set valid values to given clauses * increase `ClauseDB:;lbd` when a new assignment is found * update the initial value of `rst_lbd_thr` based on experimentation * increase `ClauseDB:;lbd` when a new assignment is found (part 2) * cargo test * parameter tuning; use cfg! macro instead of cfg attribute * rename 'depG' label to 'entg' * (num_reducible) parameter tuning * (num_reducible) tiny parameter change * AssignStack: add stage_scale * implement stage-controlled trail-saving * implement stage-controlled var activity rescaling * renamed: misc/search.tex -> misc/algorithm.tex * bump version up to 0.15.0-alpha2
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- Add `RestartManager` and Remove `GeometricStabilizer` #161 - Switch from a decision-making model to a simple dynamics model for restart #164 - `RestartManager` is stored in `State`. - revise the definition of 'literal block entanglement' to accumulate only inter-block clauses (1 < LBD). - Move some EMAs in `rst` to `asg' and `cdb`. #164 - Rescale var activity after the end of the 2nd-level cycle of the Luby series. #163 - Restart stages change the trail-saving setting. #163 - The pre/in processor was demoted as an on-the-fly module. - Add `StageManager`, which compresses var activity after the end of each 2nd-level Luby cycle in order to diversify the direction of search. #161 - Drop refinement on trail_saving; restarts reset dependency. It's enough. - Change the definition of `ProgressASG`. It counts the number of assigned literals after restarts instead of unassigned ones.
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Forked from #161 and spawned and merged #164.
dynamic_restart_thresholdmore refactoring #164lbd_of_dpholds too small values, revise the definitions of parameters used in trail saver and clause eliminator.cdbfromrst. more refactoring #164Design Decisions to be noted