842 lines
29 KiB
Prolog
842 lines
29 KiB
Prolog
%%% -*- Mode: Prolog; -*-
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% $Date: 2010-08-24 15:14:21 +0200 (Di, 24. Aug 2010) $
|
|
% $Revision: 4671 $
|
|
%
|
|
% This file is part of ProbLog
|
|
% http://dtai.cs.kuleuven.be/problog
|
|
%
|
|
% ProbLog was developed at Katholieke Universiteit Leuven
|
|
%
|
|
% Copyright 2008, 2009, 2010
|
|
% Katholieke Universiteit Leuven
|
|
%
|
|
% Main authors of this file:
|
|
% Guy Van den Broeck
|
|
%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% Artistic License 2.0
|
|
%
|
|
% Copyright (c) 2000-2006, The Perl Foundation.
|
|
%
|
|
% Everyone is permitted to copy and distribute verbatim copies of this
|
|
% license document, but changing it is not allowed. Preamble
|
|
%
|
|
% This license establishes the terms under which a given free software
|
|
% Package may be copied, modified, distributed, and/or
|
|
% redistributed. The intent is that the Copyright Holder maintains some
|
|
% artistic control over the development of that Package while still
|
|
% keeping the Package available as open source and free software.
|
|
%
|
|
% You are always permitted to make arrangements wholly outside of this
|
|
% license directly with the Copyright Holder of a given Package. If the
|
|
% terms of this license do not permit the full use that you propose to
|
|
% make of the Package, you should contact the Copyright Holder and seek
|
|
% a different licensing arrangement. Definitions
|
|
%
|
|
% "Copyright Holder" means the individual(s) or organization(s) named in
|
|
% the copyright notice for the entire Package.
|
|
%
|
|
% "Contributor" means any party that has contributed code or other
|
|
% material to the Package, in accordance with the Copyright Holder's
|
|
% procedures.
|
|
%
|
|
% "You" and "your" means any person who would like to copy, distribute,
|
|
% or modify the Package.
|
|
%
|
|
% "Package" means the collection of files distributed by the Copyright
|
|
% Holder, and derivatives of that collection and/or of those files. A
|
|
% given Package may consist of either the Standard Version, or a
|
|
% Modified Version.
|
|
%
|
|
% "Distribute" means providing a copy of the Package or making it
|
|
% accessible to anyone else, or in the case of a company or
|
|
% organization, to others outside of your company or organization.
|
|
%
|
|
% "Distributor Fee" means any fee that you charge for Distributing this
|
|
% Package or providing support for this Package to another party. It
|
|
% does not mean licensing fees.
|
|
%
|
|
% "Standard Version" refers to the Package if it has not been modified,
|
|
% or has been modified only in ways explicitly requested by the
|
|
% Copyright Holder.
|
|
%
|
|
% "Modified Version" means the Package, if it has been changed, and such
|
|
% changes were not explicitly requested by the Copyright Holder.
|
|
%
|
|
% "Original License" means this Artistic License as Distributed with the
|
|
% Standard Version of the Package, in its current version or as it may
|
|
% be modified by The Perl Foundation in the future.
|
|
%
|
|
% "Source" form means the source code, documentation source, and
|
|
% configuration files for the Package.
|
|
%
|
|
% "Compiled" form means the compiled bytecode, object code, binary, or
|
|
% any other form resulting from mechanical transformation or translation
|
|
% of the Source form.
|
|
%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% Permission for Use and Modification Without Distribution
|
|
%
|
|
% (1) You are permitted to use the Standard Version and create and use
|
|
% Modified Versions for any purpose without restriction, provided that
|
|
% you do not Distribute the Modified Version.
|
|
%
|
|
% Permissions for Redistribution of the Standard Version
|
|
%
|
|
% (2) You may Distribute verbatim copies of the Source form of the
|
|
% Standard Version of this Package in any medium without restriction,
|
|
% either gratis or for a Distributor Fee, provided that you duplicate
|
|
% all of the original copyright notices and associated disclaimers. At
|
|
% your discretion, such verbatim copies may or may not include a
|
|
% Compiled form of the Package.
|
|
%
|
|
% (3) You may apply any bug fixes, portability changes, and other
|
|
% modifications made available from the Copyright Holder. The resulting
|
|
% Package will still be considered the Standard Version, and as such
|
|
% will be subject to the Original License.
|
|
%
|
|
% Distribution of Modified Versions of the Package as Source
|
|
%
|
|
% (4) You may Distribute your Modified Version as Source (either gratis
|
|
% or for a Distributor Fee, and with or without a Compiled form of the
|
|
% Modified Version) provided that you clearly document how it differs
|
|
% from the Standard Version, including, but not limited to, documenting
|
|
% any non-standard features, executables, or modules, and provided that
|
|
% you do at least ONE of the following:
|
|
%
|
|
% (a) make the Modified Version available to the Copyright Holder of the
|
|
% Standard Version, under the Original License, so that the Copyright
|
|
% Holder may include your modifications in the Standard Version. (b)
|
|
% ensure that installation of your Modified Version does not prevent the
|
|
% user installing or running the Standard Version. In addition, the
|
|
% modified Version must bear a name that is different from the name of
|
|
% the Standard Version. (c) allow anyone who receives a copy of the
|
|
% Modified Version to make the Source form of the Modified Version
|
|
% available to others under (i) the Original License or (ii) a license
|
|
% that permits the licensee to freely copy, modify and redistribute the
|
|
% Modified Version using the same licensing terms that apply to the copy
|
|
% that the licensee received, and requires that the Source form of the
|
|
% Modified Version, and of any works derived from it, be made freely
|
|
% available in that license fees are prohibited but Distributor Fees are
|
|
% allowed.
|
|
%
|
|
% Distribution of Compiled Forms of the Standard Version or
|
|
% Modified Versions without the Source
|
|
%
|
|
% (5) You may Distribute Compiled forms of the Standard Version without
|
|
% the Source, provided that you include complete instructions on how to
|
|
% get the Source of the Standard Version. Such instructions must be
|
|
% valid at the time of your distribution. If these instructions, at any
|
|
% time while you are carrying out such distribution, become invalid, you
|
|
% must provide new instructions on demand or cease further
|
|
% distribution. If you provide valid instructions or cease distribution
|
|
% within thirty days after you become aware that the instructions are
|
|
% invalid, then you do not forfeit any of your rights under this
|
|
% license.
|
|
%
|
|
% (6) You may Distribute a Modified Version in Compiled form without the
|
|
% Source, provided that you comply with Section 4 with respect to the
|
|
% Source of the Modified Version.
|
|
%
|
|
% Aggregating or Linking the Package
|
|
%
|
|
% (7) You may aggregate the Package (either the Standard Version or
|
|
% Modified Version) with other packages and Distribute the resulting
|
|
% aggregation provided that you do not charge a licensing fee for the
|
|
% Package. Distributor Fees are permitted, and licensing fees for other
|
|
% components in the aggregation are permitted. The terms of this license
|
|
% apply to the use and Distribution of the Standard or Modified Versions
|
|
% as included in the aggregation.
|
|
%
|
|
% (8) You are permitted to link Modified and Standard Versions with
|
|
% other works, to embed the Package in a larger work of your own, or to
|
|
% build stand-alone binary or bytecode versions of applications that
|
|
% include the Package, and Distribute the result without restriction,
|
|
% provided the result does not expose a direct interface to the Package.
|
|
%
|
|
% Items That are Not Considered Part of a Modified Version
|
|
%
|
|
% (9) Works (including, but not limited to, modules and scripts) that
|
|
% merely extend or make use of the Package, do not, by themselves, cause
|
|
% the Package to be a Modified Version. In addition, such works are not
|
|
% considered parts of the Package itself, and are not subject to the
|
|
% terms of this license.
|
|
%
|
|
% General Provisions
|
|
%
|
|
% (10) Any use, modification, and distribution of the Standard or
|
|
% Modified Versions is governed by this Artistic License. By using,
|
|
% modifying or distributing the Package, you accept this license. Do not
|
|
% use, modify, or distribute the Package, if you do not accept this
|
|
% license.
|
|
%
|
|
% (11) If your Modified Version has been derived from a Modified Version
|
|
% made by someone other than you, you are nevertheless required to
|
|
% ensure that your Modified Version complies with the requirements of
|
|
% this license.
|
|
%
|
|
% (12) This license does not grant you the right to use any trademark,
|
|
% service mark, tradename, or logo of the Copyright Holder.
|
|
%
|
|
% (13) This license includes the non-exclusive, worldwide,
|
|
% free-of-charge patent license to make, have made, use, offer to sell,
|
|
% sell, import and otherwise transfer the Package with respect to any
|
|
% patent claims licensable by the Copyright Holder that are necessarily
|
|
% infringed by the Package. If you institute patent litigation
|
|
% (including a cross-claim or counterclaim) against any party alleging
|
|
% that the Package constitutes direct or contributory patent
|
|
% infringement, then this Artistic License to you shall terminate on the
|
|
% date that such litigation is filed.
|
|
%
|
|
% (14) Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT
|
|
% HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
% WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
|
|
% PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT
|
|
% PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT
|
|
% HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
% INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE
|
|
% OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% DECISION-THEORETIC PROBLOG
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
:- module(dtproblog, [
|
|
problog_delta/5,
|
|
problog_threshold/5,
|
|
problog_low/4,
|
|
problog_kbest/4,
|
|
problog_kbest_save/6,
|
|
problog_max/3,
|
|
problog_exact/3,
|
|
problog_montecarlo/3,
|
|
problog_dnf_sampling/3,
|
|
problog_answers/2,
|
|
problog_kbest_answers/3,
|
|
problog_table/1,
|
|
clear_retained_tables/0,
|
|
problog_neg/1,
|
|
get_fact_probability/2,
|
|
set_fact_probability/2,
|
|
get_continuous_fact_parameters/2,
|
|
set_continuous_fact_parameters/2,
|
|
get_fact/2,
|
|
tunable_fact/2,
|
|
continuous_fact/1,
|
|
non_ground_fact/1,
|
|
export_facts/1,
|
|
problog_help/0,
|
|
show_inference/0,
|
|
problog_dir/1,
|
|
set_problog_flag/2,
|
|
problog_flag/2,
|
|
problog_flags/0,
|
|
reset_problog_flags/0,
|
|
problog_assert/1,
|
|
problog_assert/2,
|
|
problog_retractall/1,
|
|
problog_statistics/2,
|
|
problog_statistics/0,
|
|
grow_atom_table/1,
|
|
problog_exact_nested/3,
|
|
problog_tabling_negated_synonym/2,
|
|
build_trie/2,
|
|
build_trie/3,
|
|
problog_infer/2,
|
|
problog_infer/3,
|
|
problog_infer_forest/2,
|
|
write_bdd_struct_script/3,
|
|
problog_bdd_forest/1,
|
|
require/1,
|
|
unrequire/1,
|
|
'::'/2,
|
|
probabilistic_fact/3,
|
|
problog_real_kbest/4,
|
|
in_interval/3,
|
|
below/2,
|
|
above/2,
|
|
op( 550, yfx, :: ),
|
|
op( 550, fx, ?:: ),
|
|
op( 1150, fx, problog_table ),
|
|
|
|
% DTProbLog
|
|
set_strategy/1,
|
|
unset_strategy/1,
|
|
dtproblog_utility_facts/1,
|
|
dtproblog_utility_attributes/1,
|
|
dtproblog_ev/2,
|
|
dtproblog_ev/3,
|
|
dtproblog_ev/4,
|
|
dtproblog_decisions/1,
|
|
dtproblog_decision_ids/1,
|
|
dtproblog_decision_ids/2,
|
|
dtproblog_solve/2,
|
|
dtproblog_solve_specialized/2,
|
|
dtproblog_solve_general/2,
|
|
dtproblog_solve_local/4,
|
|
dtproblog_solve_naive/2,
|
|
op( 550, yfx, => )
|
|
]).
|
|
|
|
:- style_check(all).
|
|
:- yap_flag(unknown,error).
|
|
|
|
% problog-related modules
|
|
|
|
:- use_module('problog').
|
|
|
|
:- use_module('problog/flags',[
|
|
problog_define_flag/4,
|
|
problog_define_flag/5,
|
|
problog_define_flag/6,
|
|
set_problog_flag/2,
|
|
reset_problog_flags/0,
|
|
problog_flag/2
|
|
]).
|
|
|
|
:- use_module('problog/os', [convert_filename_to_working_path/2,
|
|
convert_filename_to_problog_path/2]).
|
|
|
|
:- use_module('problog/ptree', [delete_ptree/1]).
|
|
|
|
:- use_module('problog/tabling', [clear_tabling/0]).
|
|
|
|
|
|
% general yap modules
|
|
:- use_module(library(system), [delete_file/2, shell/2]).
|
|
|
|
:- initialization((
|
|
problog_define_flag(optimization, problog_flag_validate_atom, 'optimization algorithm [local/global]', global, dtproblog),
|
|
problog_define_flag(forest_type, problog_flag_validate_atom, 'type of BDD forest [dependent/independent]', dependent, dtproblog)
|
|
)).
|
|
|
|
init_dtproblog :-
|
|
problog_control(off,find_decisions),
|
|
problog_control(off,internal_strategy).
|
|
|
|
:- initialization(init_dtproblog).
|
|
|
|
:- op( 550, yfx, :: ).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Utility Attributes
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
% op for utility attributes
|
|
:- op( 550, yfx, => ).
|
|
|
|
% SETOF DOESNT WORK!!! BUT all/3 is A LOT slower because it doesn't sort the solutions?
|
|
dtproblog_utility_facts(Facts) :-
|
|
all((Attr => Util),user:(Attr => Util),Facts).
|
|
|
|
dtproblog_utility_attributes(Attrs) :-
|
|
dtproblog_utility_facts(Facts),
|
|
facts_to_attributes(Facts,Attrs).
|
|
|
|
facts_to_attributes([],[]).
|
|
facts_to_attributes([A => _|FR],[A|AR]) :- facts_to_attributes(FR,AR).
|
|
|
|
conditioned_utility_facts([],_,[],[]).
|
|
conditioned_utility_facts([(Attr => Reward)|Facts],Condition,[(Condition,Attr)|Attrs],[Reward|Rewards]):-
|
|
conditioned_utility_facts(Facts,Condition,Attrs,Rewards).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Strategies (getting/setting/transforming)
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
% Internal strategy representation
|
|
% for GROUND strategies (one can specify a ground strategy for a non-ground decision clause)
|
|
% e.g. 1 :: market(guy) for ? :: market(P).
|
|
set_ground_strategy(GID,LogProb) :- bb_put(GID,LogProb).
|
|
get_ground_strategy(GID,LogProb) :- bb_get(GID,LogProb),!.
|
|
get_ground_strategy(_,never).
|
|
|
|
% Internal strategy representation
|
|
% for NON-GROUND strategies
|
|
% e.g. 1 :: market(guy) for ? :: market(P)
|
|
:- dynamic(non_ground_strategy/2).
|
|
|
|
% Get Strategy
|
|
strategy(_,_,_) :-
|
|
\+ problog_control(check,internal_strategy),
|
|
throw(error('Trying to get a strategy that is not set.')).
|
|
strategy(ID,Decision,Prob) :-
|
|
grounding_id(ID,Decision,GID),
|
|
bb_get(GID,LogProb), % because we don't want the default, maybe there is a non-ground strategy
|
|
!,
|
|
logprob_prob(LogProb, Prob).
|
|
strategy(_,Decision,Prob) :-
|
|
non_ground_strategy(Decision,LogProb),
|
|
!,
|
|
logprob_prob(LogProb, Prob).
|
|
strategy(_,_,never).
|
|
|
|
strategy_log(ID,Decision,LogProb) :-
|
|
strategy(ID,Decision,Prob),
|
|
logprob_prob(LogProb, Prob).
|
|
|
|
% convert from/to probabilities and their logarithms
|
|
logprob_prob(always,always) :- !.
|
|
logprob_prob(never,never) :- !.
|
|
logprob_prob(0,always) :- !.
|
|
logprob_prob(-inf,never) :- !.
|
|
logprob_prob(always,1) :- !.
|
|
logprob_prob(never,0) :- !.
|
|
logprob_prob(LogP,P) :-
|
|
number(LogP),
|
|
!,
|
|
P is exp(LogP).
|
|
logprob_prob(LogP,P) :-
|
|
number(P),
|
|
!,
|
|
LogP is log(p).
|
|
|
|
% Set Strategy
|
|
% expects a list of (p :: decision) terms
|
|
% - (decision) is interpreted as (1 :: decision)
|
|
% - decisions that are not set will evaluate to (0 :: decision)
|
|
set_strategy(_) :-
|
|
problog_control(check,internal_strategy),
|
|
throw(error('A strategy is already set, unset first.')).
|
|
set_strategy([]) :- problog_control(on,internal_strategy).
|
|
set_strategy([Term|R]) :-
|
|
strategy_entry(Term,LogProb,Decision),
|
|
(user:problog_user_ground(Decision)->
|
|
decision_fact(ID,Decision),
|
|
grounding_id(ID,Decision,ID2),
|
|
%format("Setting ~q/~q to ~q~n",[Decision,ID2,Prob]),
|
|
set_ground_strategy(ID2,LogProb)
|
|
;
|
|
copy_term(Decision, Decision2),
|
|
assertz(non_ground_strategy(Decision2,LogProb))
|
|
),
|
|
set_strategy(R).
|
|
|
|
unset_strategy(_) :-
|
|
\+ problog_control(check,internal_strategy),
|
|
throw(error('Cannot unset a strategy when no strategy is set.')).
|
|
unset_strategy([]) :-
|
|
retractall(non_ground_strategy(_,_)),
|
|
problog_control(off,internal_strategy).
|
|
unset_strategy([Term|R]) :-
|
|
strategy_entry(Term,LogProb,Decision),
|
|
(user:problog_user_ground(Decision)->
|
|
decision_fact(ID,Decision),
|
|
grounding_id(ID,Decision,ID2),
|
|
%format("Unsetting ~q/~q to ~q~n",[Decision,ID2,Prob]),
|
|
bb_delete(ID2,LogProb)
|
|
;
|
|
true
|
|
),
|
|
unset_strategy(R).
|
|
|
|
strategy_entry('::'(Prob,Decision),LogProb,Decision) :-
|
|
!,logprob_prob(LogProb, Prob).
|
|
strategy_entry(Decision,always,Decision).
|
|
|
|
% Get strategy for a list of decision IDs
|
|
% only use when grounding ids are known and strategy is stored internally!
|
|
strategy_as_term_list(IDs,List) :- strategy_as_term_list(IDs,[],List).
|
|
strategy_as_term_list([],In,In).
|
|
strategy_as_term_list([ID|R],In,Out) :-
|
|
strategy_as_term(ID,In,In2),
|
|
strategy_as_term_list(R,In2,Out).
|
|
|
|
% Get strategy for a decision ID
|
|
strategy_as_term(ID,In,Out) :-
|
|
%findall(grounding_is_known(D,I),grounding_is_known(D,I),LGround),
|
|
%findall(decision_fact(D,I),decision_fact(D,I),LBasic),
|
|
%format("Known IDs: ~q~n",[LGround]),
|
|
%format("Known IDs: ~q~n",[LBasic]),
|
|
((recover_grounding_id(ID,GID),grounding_is_known(Decision,GID)) ->
|
|
%original fact was non-ground
|
|
true
|
|
;
|
|
% original fact was ground
|
|
decision_fact(ID,Decision)
|
|
),
|
|
strategy(ID,Decision,Prob),
|
|
strategy_as_term_entry(Decision,Prob,In,Out).
|
|
|
|
% Convert strategy for a decision to term representation
|
|
strategy_as_term_entry(_,0,In,In) :- !.
|
|
strategy_as_term_entry(Decision,1,In,[Decision|In]) :- !.
|
|
strategy_as_term_entry(_,never,In,In) :- !.
|
|
strategy_as_term_entry(Decision,always,In,[Decision|In]) :- !.
|
|
strategy_as_term_entry(Decision,P,In,[P'::'Decision|In]).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Utility inference
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
% Unconditional expected value for all utilities
|
|
dtproblog_ev(Strategy,Ev) :- dtproblog_ev(Strategy,true,Ev).
|
|
|
|
% Conditional expected value for a given strategy and all utility attributes
|
|
dtproblog_ev(Strategy,Condition,Ev) :-
|
|
(dtproblog_utility_facts(UtilFacts) ->
|
|
dtproblog_ev(Strategy,Condition,UtilFacts,Ev)
|
|
;
|
|
format('There are no utility facts in the program.~n',[]),
|
|
Ev = 0
|
|
).
|
|
|
|
% Conditional expected value for a given strategy and utility attributes
|
|
dtproblog_ev(Strategy,Condition,UtilFacts,Ev) :-
|
|
require(keep_ground_ids),
|
|
set_strategy(Strategy),
|
|
ev_for_internal_strategy(Condition,UtilFacts,Ev),
|
|
unset_strategy(Strategy),
|
|
unrequire(keep_ground_ids),
|
|
reset_non_ground_facts.
|
|
|
|
% Conditional expected value for internal strategy and given utility attributes
|
|
% assumes that problog_control(on,internal_strategy)
|
|
ev_for_internal_strategy(Condition,UtilFacts,Ev) :-
|
|
require(keep_ground_ids),
|
|
(problog_infer_forest_supported ->
|
|
% specialized version for inference using forests
|
|
conditioned_utility_facts(UtilFacts,Condition,Goals,Utilities),
|
|
problog_infer_forest([Condition|Goals],[CondProb|GoalProbs]),
|
|
!, % forest inference was supported, don't try general purpose
|
|
summed_utils(Utilities,GoalProbs,0,EvUncond),
|
|
Ev is EvUncond/CondProb
|
|
;
|
|
% general-purpose version
|
|
ev_loop(Condition, UtilFacts, 0, EvUnnormalized),
|
|
problog_infer(Condition, Prob),
|
|
%format("Dividing the utilities by the conditional probability ~q~n",[Prob]),
|
|
(Prob > 0.000001 ->
|
|
Ev is EvUnnormalized/Prob
|
|
;
|
|
format('Impossible condition: ~q has probability ~q.~n', [Condition,Prob]),
|
|
%throw(error(improbable_condition(Condition)))
|
|
Ev = -inf
|
|
)
|
|
),
|
|
unrequire(keep_ground_ids),
|
|
reset_non_ground_facts.
|
|
|
|
summed_utils([],[],Ev,Ev).
|
|
summed_utils([Util|Utils],[Prob|Probs],Acc,Ev) :-
|
|
Acc2 is Acc + (Util * Prob),
|
|
summed_utils(Utils,Probs,Acc2,Ev).
|
|
|
|
ev_loop(_, [],Acc,Acc).
|
|
ev_loop(Condition,[(Attr => Util)|R],Acc,Ev) :-
|
|
problog_infer((Condition,Attr), Prob),
|
|
Acc2 is Acc + (Prob * Util),
|
|
%format('The probability of ~q is ~q, yielding a utility of ~q.~n', [(Condition,Attr),Prob,Prob * Util]),
|
|
ev_loop(Condition,R,Acc2,Ev).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Finding all decisions used in proofs
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
% Finding all decisions used in proofs
|
|
dtproblog_decisions(Decisions) :-
|
|
require(keep_ground_ids),
|
|
dtproblog_decision_ids(IDs),
|
|
ids_as_decisions(IDs,Decisions),
|
|
unrequire(keep_ground_ids),
|
|
reset_non_ground_facts.
|
|
|
|
|
|
% Get decisions for a list of IDs
|
|
ids_as_decisions(IDs,List) :- ids_as_decisions(IDs,[],List).
|
|
|
|
ids_as_decisions([],In,In).
|
|
ids_as_decisions([ID|R],In,Out) :-
|
|
id_as_decision(ID,In,In2),
|
|
ids_as_decisions(R,In2,Out).
|
|
|
|
id_as_decision(ID,In,[Decision|In]) :-
|
|
%findall(grounding_is_known(D,I),grounding_is_known(D,I),LGround),
|
|
%findall(decision_fact(D,I),decision_fact(D,I),LBasic),
|
|
%format("Known IDs: ~q~n",[LGround]),
|
|
%format("Known IDs: ~q~n",[LBasic]),
|
|
((recover_grounding_id(ID,GID),grounding_is_known(Decision,GID)) ->
|
|
% original fact was non-ground
|
|
true
|
|
;
|
|
% original fact was ground
|
|
decision_fact(ID,Decision)
|
|
).
|
|
|
|
% Finding all decision IDs used in proofs
|
|
dtproblog_decision_ids(Decisions) :-
|
|
(dtproblog_utility_attributes(UtilityAttrs) ->
|
|
dtproblog_decision_ids(UtilityAttrs,Decisions)
|
|
;
|
|
Decisions = []
|
|
).
|
|
|
|
dtproblog_decision_ids(UtilityAttrs,Decisions) :-
|
|
require(keep_ground_ids),
|
|
problog_control(on,find_decisions),
|
|
reset_decisions,
|
|
add_decisions_all(UtilityAttrs),
|
|
unrequire(keep_ground_ids),
|
|
reset_non_ground_facts,
|
|
get_decisions(Decisions),
|
|
problog_control(off,find_decisions),
|
|
reset_decisions.
|
|
|
|
% TODO generalize so that it works with every inference method, not just exact.
|
|
add_decisions_all([]) :-
|
|
clear_tabling.
|
|
add_decisions_all([Goal|R]) :-
|
|
add_decisions(Goal),
|
|
add_decisions_all(R).
|
|
|
|
% UGLY - needs to actually build tries for tabling to work.
|
|
% TODO change tabling.yap to do nothing when problog_control(on,find_decisions)
|
|
% then, simplify this predicate so that it doesn't build tries
|
|
% setting problog_control(on,mc) might work, but will maybe prune some decisions away?
|
|
add_decisions(Goal) :-
|
|
problog_control(on, exact),
|
|
build_trie(exact, Goal, Trie),
|
|
delete_ptree(Trie),
|
|
problog_control(off, exact).
|
|
|
|
reset_decisions :- bb_put(problog:decisions,[]).
|
|
|
|
get_decisions(D) :- bb_get(problog:decisions,D).
|
|
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% Strategy optimization
|
|
%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
dtproblog_solve(Strategy,EV) :-
|
|
(dtproblog_solve_specialized_supported -> % try to go specialized
|
|
dtproblog_solve_specialized(Strategy,EV)
|
|
;
|
|
format('Flag settings not supported by specialized solution algorithm.~nTrying general purpose version.~n',[]),
|
|
(dtproblog_solve_general_supported -> % try to go general
|
|
dtproblog_solve_general(Strategy,EV)
|
|
;
|
|
throw(error('Flag settings not supported by dtproblog_solve/2.'))
|
|
)
|
|
).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Strategy optimization (specialized in BDD)
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
dtproblog_solve_specialized(Strategy,EV) :-
|
|
(dtproblog_solve_specialized_supported ->
|
|
require(keep_ground_ids),
|
|
dtproblog_utility_facts(UtilFacts),
|
|
conditioned_utility_facts(UtilFacts,true,Goals,Utilities),
|
|
write_util_file(Utilities),
|
|
problog_bdd_forest(Goals),
|
|
length(Goals,N),
|
|
bdd_optimization(N,EV,DecisionIDs,ok),
|
|
(problog_flag(save_bdd,true) -> true ; delete_util_file ),
|
|
strategy_as_term_list(DecisionIDs,Strategy),
|
|
unset_strategy(Strategy), % was set by bdd_optimization/4
|
|
require(keep_ground_ids),
|
|
reset_non_ground_facts
|
|
;
|
|
throw(error('Flag settings not supported by dtproblog_solve_specialized/2.'))
|
|
).
|
|
|
|
dtproblog_solve_specialized_supported :-
|
|
problog_bdd_forest_supported,
|
|
(
|
|
problog_flag(forest_type, dependent)
|
|
;
|
|
problog_flag(optimization, local)
|
|
).
|
|
|
|
|
|
% Write a utility file, with for every utility attribute BDD, its reward value on a new line
|
|
write_util_file(Utils) :-
|
|
bdd_util_file(UtilFile),
|
|
open(UtilFile,'write',UtilFileStream),
|
|
tell(UtilFileStream),
|
|
length(Utils,N),
|
|
format("~w~n",[N]),
|
|
write_util_file_line(Utils),
|
|
flush_output,
|
|
told.
|
|
|
|
write_util_file_line([]).
|
|
write_util_file_line([U|R]) :-
|
|
format("~w~n",[U]),
|
|
write_util_file_line(R).
|
|
|
|
bdd_util_file(UtilFile) :-
|
|
problog_flag(bdd_file,BDDFileFlag),
|
|
atomic_concat([BDDFileFlag,'_',utils],UtilFileName),
|
|
convert_filename_to_working_path(UtilFileName, UtilFile).
|
|
|
|
delete_util_file :-
|
|
bdd_util_file(UtilFile),
|
|
delete_file(UtilFile,[]).
|
|
|
|
bdd_optimization(N,EV,Decisions,Status) :-
|
|
bdd_files(BDDFile,BDDParFile),
|
|
problog_flag(bdd_time,BDDTime),
|
|
(problog_flag(dynamic_reorder, true) -> ParamD = '' ; ParamD = ' -dreorder'),
|
|
(problog_flag(bdd_static_order, true) ->
|
|
problog_flag(static_order_file, FileName),
|
|
convert_filename_to_working_path(FileName, SOFileName),
|
|
atomic_concat([ParamD, ' -sord ', SOFileName], Param)
|
|
;
|
|
Param = ParamD
|
|
),
|
|
convert_filename_to_problog_path('problogbdd', ProblogBDD),
|
|
problog_flag(bdd_result,ResultFileFlag),
|
|
convert_filename_to_working_path(ResultFileFlag, ResultFile),
|
|
bdd_util_file(UtilFile),
|
|
(problog_flag(optimization,local) -> LocalPar = ' -lo';LocalPar = ''),
|
|
(problog_flag(forest_type,independent) -> Forest = ' -if';Forest = ''),
|
|
%(problog_flag(verbose,true) -> Debug = ' -d';Debug = ''), % messes up result parsing
|
|
atomic_concat([ProblogBDD, Param, ' -l ',BDDFile,' -i ',BDDParFile,' -u ',UtilFile,' -m s',LocalPar,Forest,' -t ', BDDTime,' > ', ResultFile],Command),
|
|
statistics(walltime,_),
|
|
% format(user,'$ ~w~n',[Command]),
|
|
shell(Command,Return),
|
|
(Return =\= 0 ->
|
|
Status = timeout
|
|
;
|
|
statistics(walltime,[_,E3]),
|
|
(problog_flag(verbose,true) -> format(user,'~w ms BDD processing~n',[E3]);true),
|
|
see(ResultFile),
|
|
read(expected_value(EV)),
|
|
read_strategy(Decisions),
|
|
seen,
|
|
Status = ok,
|
|
% cleanup
|
|
(problog_flag(save_bdd,true) ->
|
|
true
|
|
;
|
|
delete_file(BDDFile,[]),
|
|
delete_file(BDDParFile,[]),
|
|
delete_file(ResultFile,[]),
|
|
delete_bdd_forest_files(N)
|
|
)
|
|
).
|
|
|
|
% set the strategy in the internal format and returns a list of all decisions
|
|
read_strategy(_) :-
|
|
problog_control(check,internal_strategy),
|
|
throw(error('A strategy is already set, unset first.')).
|
|
read_strategy(DecisionIDs) :-
|
|
problog_control(on,internal_strategy),
|
|
read_strategy_intern(DecisionIDs).
|
|
read_strategy_intern(DecisionIDs) :-
|
|
read(T),
|
|
(T = end_of_file ->
|
|
DecisionIDs = []
|
|
;
|
|
T = strategy(ID,Prob),
|
|
logprob_prob(LProb,Prob),
|
|
set_ground_strategy(ID,LProb),
|
|
DecisionIDs = [ID|Rest],
|
|
read_strategy_intern(Rest)
|
|
).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Strategy optimization (general purpose)
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
dtproblog_solve_general(Strategy,EV) :-
|
|
(dtproblog_solve_general_supported ->
|
|
dtproblog_utility_facts(UtilFacts),
|
|
dtproblog_solve_local(true,UtilFacts,Strategy,EV)
|
|
;
|
|
throw(error('Flag settings not supported by dtproblog_solve_specialized/2.'))
|
|
).
|
|
|
|
dtproblog_solve_general_supported :- problog_flag(optimization, local).
|
|
|
|
dtproblog_solve_local(Condition,Utils,Strategy,EV) :-
|
|
require(keep_ground_ids),
|
|
facts_to_attributes(Utils,Attrs),
|
|
dtproblog_decision_ids(Attrs,DecisionIDs),
|
|
problog_control(on,internal_strategy), % consider strategy set, even though everything is default
|
|
ev_for_internal_strategy(Condition,Utils,EvStart),
|
|
optimization_iteration_loop(DecisionIDs,Condition,Utils,EvStart,EV),
|
|
strategy_as_term_list(DecisionIDs,Strategy),
|
|
unset_strategy(Strategy),
|
|
unrequire(keep_ground_ids),
|
|
reset_non_ground_facts.
|
|
|
|
optimization_iteration_loop(Decisions,Condition,Utils,EVIn,EVOut) :-
|
|
optimization_decision_loop(Decisions,Condition,Utils,EVIn,EVTemp),
|
|
strategy_as_term_list(Decisions,Strategy),
|
|
(problog_flag(verbose,true) -> format("Found strategy ~q with EV=~q~n",[Strategy,EVTemp]);true),
|
|
(EVIn == EVTemp ->
|
|
EVOut = EVTemp
|
|
;
|
|
optimization_iteration_loop(Decisions,Condition,Utils,EVTemp,EVOut)
|
|
).
|
|
|
|
optimization_decision_loop([],_,_,Ev,Ev).
|
|
optimization_decision_loop([ID|Rest],Condition,Utils,EvIn,EvOut) :-
|
|
get_ground_strategy(ID,ProbBefore),
|
|
flip(ProbBefore, ProbAfter),
|
|
set_ground_strategy(ID,ProbAfter),
|
|
ev_for_internal_strategy(Condition,Utils,EvTest),
|
|
(EvTest>EvIn ->
|
|
EvTemp = EvTest,
|
|
(problog_flag(verbose,true) -> format("Changing strategy for #~q to ~q for EV of ~q~n",[ID,ProbAfter,EvTest]);true)
|
|
;
|
|
EvTemp = EvIn,
|
|
set_ground_strategy(ID,ProbBefore),
|
|
(problog_flag(verbose,true) -> format("Keeping strategy for #~q at ~q because EV is ~q~n",[ID,ProbBefore,EvTest]);true)
|
|
),
|
|
optimization_decision_loop(Rest,Condition,Utils,EvTemp,EvOut).
|
|
|
|
flip(always,never) :- !.
|
|
flip(never,always) :- !.
|
|
flip(P,always) :- P<1, !.
|
|
flip(_,never).
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Naive Search
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
|
dtproblog_solve_naive(Strategy,EV) :-
|
|
require(keep_ground_ids),
|
|
dtproblog_decisions(Decisions),
|
|
all_subsets(Decisions,Strategies),
|
|
max_strategy(Strategies,[],-inf,Strategy,EV),
|
|
unrequire(keep_ground_ids),
|
|
reset_non_ground_facts.
|
|
|
|
max_strategy([],Strategy,EV,Strategy,EV).
|
|
max_strategy([S1|Rest],S2,U2,S3,U3) :-
|
|
dtproblog_ev(S1,true,U1),
|
|
%format("EV of ~q is ~q~n",[S1,U1]),
|
|
(U1>U2 ->
|
|
max_strategy(Rest,S1,U1,S3,U3)
|
|
;
|
|
max_strategy(Rest,S2,U2,S3,U3)
|
|
).
|
|
|
|
% List of all sublists
|
|
all_subsets([], [[]]).
|
|
all_subsets([X|Xs], Subsets) :-
|
|
all_subsets(Xs, Subsets1),
|
|
attach_first_element(Subsets1, X, Subsets, Subsets1).
|
|
|
|
attach_first_element([], _, S, S).
|
|
attach_first_element([Sub|Subs], X, [[X|Sub]|XSubs], S) :-
|
|
attach_first_element(Subs, X, XSubs, S).
|
|
|
|
|