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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. % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % Problog Tabling: use Yap tabling for monte carlo % use probabilistic semantics tabling for exact % rest methods not benefited from tabling yet % % Look at: CICLOPS 2009 Mantadelis Theofrastos & Gerda Janssens % SRL 2009 Angelika Kimming & Vitor % % Currently: Exact handles ground goals only and loops % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% :- module(tabling, [problog_table/1, problog_tabled/1, problog_neg/1, init_tabling/0, clear_tabling/0, retain_tabling/0, clear_retained_tables/0, problog_chktabled/2, problog_abolish_table/1, problog_abolish_all_tables/0, problog_tabling_negated_synonym/2, problog_tabling_get_negated_from_pred/2, problog_tabling_get_negated_from_id/2, op(1150, fx, problog_table)]). :- use_module(library(lists), [memberchk/2]). :- use_module(extlists, _, [open_end_memberchk/2, open_end_add/3, open_end_add_unique/3, open_end_close_end/2]). :- use_module(flags, _, [problog_define_flag/4, problog_flag/2]). :- use_module(ptree, _, [init_ptree/1, delete_ptree/1, merge_ptree/2, empty_ptree/1]). :- op( 1150, fx, problog_table ). :- meta_predicate(problog_table(0)). :- meta_predicate(problog_neg(0)). :- dynamic(problog_tabled/1). :- dynamic(has_synonyms/0). :- dynamic(problog_tabling_retain/1). :- initialization(( problog_define_flag(max_depth, problog_flag_validate_integer, 'maximum proof depth', -1), problog_define_flag(retain_tables, problog_flag_validate_boolean, 'retain tables after query', false) )). init_tabling :- nb_setval(problog_current_depth, 0), nb_setval(problog_suspended_tries, []), nb_setval(problog_current_ptree, problog_completed_proofs), nb_setval(problog_nested_tries, false), nb_setval(problog_tabling_next_index, 1). clear_tabling:- nb_setval(problog_suspended_tries, []), nb_setval(problog_current_ptree, 1), nb_setval(problog_nested_tries, false), nb_setval(problog_tabling_next_index, 1), forall(problog_chktabled(_, Trie), (problog_tabling_retain(Trie) -> true ; delete_ptree(Trie) ) ), eraseall(problog_table), !. clear_tabling. retain_tabling:- forall(problog_chktabled(_, Trie), assertz(problog_tabling_retain(Trie))). clear_retained_tables:- forall(problog_tabling_retain(Trie), delete_ptree(Trie)), retractall(problog_tabling_retain(_)). problog_chktabled(Index, Trie):- recorded(problog_table, store(_, Index, Trie, _, _), _). problog_table_next_index(Index):- nb_getval(problog_tabling_next_index, Index), NIndex is Index + 1, nb_setval(problog_tabling_next_index, NIndex). problog_table(M:P) :- !, problog_table(P, M). problog_table(P) :- prolog_load_context(module, M), problog_table(P, M). problog_table(M:P, _) :- problog_table(P, M). problog_table((P1, P2), M) :- problog_table(P1, M), problog_table(P2, M). problog_table(Name/Arity, Module) :- length(Args,Arity), Head =.. [Name|Args], \+ predicate_property(Module:Head, dynamic), !, throw(error('problog_table: Problog tabling currently requires the predicate to be declared dynamic and compiles it to static.')). problog_table(Name/Arity, Module) :- length(Args,Arity), Head =.. [Name|Args], atom_concat(['problog_', Name, '_original'], OriginalName), atom_concat(['problog_', Name, '_mctabled'], MCName), atom_concat(['problog_', Name, '_tabled'], ExactName), % Monte carlo tabling catch((table(Module:MCName/Arity), assertz(problog_tabled(Module:Name/Arity))), _, (format(user_error, 'Warning: Tabling was not enabled over compilation, montecarlo tabling is disabled!~nPredicate: ~q~n', [Module:MCName/Arity]))), findall(_,( OriginalPred =.. [OriginalName|Args], MCPred =.. [MCName|Args], retract(Module:(Head:-Body)), assert_static(Module:(OriginalPred:-Body)), assert_static(Module:(MCPred:-Body)) ),_), OriginalPred =.. [OriginalName|Args], MCPred =.. [MCName|Args], ExactPred =.. [ExactName|Args], assertz(Module:( Head:- (problog:problog_control(check, exact) -> ExactPred ; problog:problog_control(check, mc) -> MCPred ; OriginalPred ) )), % Exact method tabling assert_static(( Module:ExactPred :- (user:problog_user_ground(Head) -> nb_setval(problog_nested_tries, true), get_negated_synonym_state(OriginalPred, State), (State = false -> true ; (recorded(problog_table, store(OriginalPred, Hash, HashTrie, SuspTrie, Finished), Ref)-> (Finished = false -> b_getval(problog_suspended_tries, Susp), b_setval(problog_suspended_tries, [Hash|Susp]) ; Finished ), b_getval(problog_current_proof, IDs), \+ open_end_memberchk(not(t(Hash)), IDs), open_end_add_unique(t(Hash), IDs, NIDs), b_setval(problog_current_proof, NIDs) ; b_getval(problog_current_proof, OIDs), b_getval(problog_current_ptree, CurrentControlTrie), b_getval(CurrentControlTrie, OCurTrie), init_ptree(HashTrie), init_ptree(SuspTrie), b_setval(problog_current_proof, []), b_setval(CurrentControlTrie, HashTrie), problog_table_next_index(Hash), recordz(problog_table, store(OriginalPred, Hash, HashTrie, SuspTrie, false), Ref), problog_flag(max_depth, MaxDepth), (MaxDepth > 0 -> nb_getval(problog_current_depth, CurDepth) ; CurDepth is MaxDepth - 1 ), (CurDepth < MaxDepth -> NewDepth is CurDepth + 1, b_setval(problog_current_depth, NewDepth), findall(_, ( Module:OriginalPred, b_getval(problog_suspended_tries, Susp), (memberchk(Hash, Susp) -> b_setval(CurrentControlTrie, SuspTrie) % maybe necessary to remove hash from susp ; true ), problog:add_solution ), _) % eager goal proofing (easier to expand for non-ground version) ; /* (empty_ptree(HashTrie) -> erase(Ref), fail ; true )*/ true ), erase(Ref), (empty_ptree(HashTrie) -> recordz(problog_table, store(OriginalPred, Hash, HashTrie, SuspTrie, fail), _NRef), delete_ptree(SuspTrie) %, %fail % no justification exists ; recordz(problog_table, store(OriginalPred, Hash, HashTrie, SuspTrie, true), _NRef), merge_ptree(HashTrie, SuspTrie), delete_ptree(SuspTrie) ), b_setval(CurrentControlTrie, OCurTrie), \+ open_end_memberchk(not(t(Hash)), OIDs), open_end_add_unique(t(Hash), OIDs, NOIDs), b_setval(problog_current_proof, NOIDs) ) ) ; % writeln(non_ground), Module:OriginalPred ) )). problog_abolish_all_tables:- abolish_all_tables. problog_abolish_table(M:P/A):- atom_concat(['problog_', P, '_mctabled'], MCName), abolish_table(M:MCName/A). % supports exact, monte-carlo, requires expansion of tabling for rest methods problog_neg(M:G):- problog:problog_control(check, exact), functor(G, Name, Arity), \+ problog_tabled(M:Name/Arity), \+ problog:problog_predicate(Name, Arity), \+ (Name == problog_neg, Arity == 1), throw(problog_neg_error('Error: goal must be dynamic and tabled', M:G)). problog_neg(M:G):- % exact inference problog:problog_control(check, exact), b_getval(problog_current_proof, IDs), b_setval(problog_current_proof, []), M:G, b_getval(problog_current_proof, L), open_end_close_end(L, [Trie]), \+ open_end_memberchk(Trie, IDs), open_end_add_unique(not(Trie), IDs, NIDs), b_setval(problog_current_proof, NIDs). problog_neg(M:G):- % monte carlo sampling problog:problog_control(check, mc), \+ M:G. % This predicate assigns a synonym for negation that means: NotName = problog_neg(Name) problog_tabling_negated_synonym(Name, NotName):- recorded(problog_table_synonyms, negated(Name, NotName), _), !. problog_tabling_negated_synonym(Name, NotName):- retractall(has_synonyms), assertz(has_synonyms), recordz(problog_table_synonyms, negated(Name, NotName), _). problog_tabling_get_negated_from_pred(Pred, Ref):- tabling:has_synonyms, Pred =.. [Name0|Args], atomic_concat(problog_, Name1, Name0), atomic_concat(Name, '_original', Name1), (recorded(problog_table_synonyms, negated(Name, NotName1), _); recorded(problog_table_synonyms, negated(NotName1, Name), _)), atomic_concat([problog_, NotName1, '_original'], NotName), NegPred =.. [NotName|Args], recorded(problog_table, store(NegPred, _, _, _, _), Ref), !. problog_tabling_get_negated_from_id(ID, Ref):- tabling:has_synonyms, recorded(problog_table, store(Pred, ID, _, _, _), _), Pred =.. [Name0|Args], atomic_concat(problog_, Name1, Name0), atomic_concat(Name, '_original', Name1), (recorded(problog_table_synonyms, negated(Name, NotName1), _); recorded(problog_table_synonyms, negated(NotName1, Name), _)), atomic_concat([problog_, NotName1, '_original'], NotName), NegPred =.. [NotName|Args], recorded(problog_table, store(NegPred, _, _, _, _), Ref), !. get_negated_synonym_state(Pred, Fin):- tabling:has_synonyms, Pred =.. [Name0|Args], atomic_concat(problog_, Name1, Name0), atomic_concat(Name, '_original', Name1), (recorded(problog_table_synonyms, negated(Name, NotName1), _); recorded(problog_table_synonyms, negated(NotName1, Name), _)), atomic_concat([problog_, NotName1, '_original'], NotName), NegPred =.. [NotName|Args], recorded(problog_table, store(NegPred, _, _, _, Fin), _), !. get_negated_synonym_state(_, true). /* get_negated_synonym_id(ID, NegID):- tabling:has_synonyms, recorded(problog_table, store(Pred, ID, _, _, _), _), Pred =.. [Name0|Args], atomic_concat(problog_, Name1, Name0), atomic_concat(Name, '_original', Name1), (recorded(problog_table_synonyms, negated(Name, NotName1), _); recorded(problog_table_synonyms, negated(NotName1, Name), _)), atomic_concat([problog_, NotName1, '_original'], NotName), NegPred =.. [NotName|Args], recorded(problog_table, store(NegPred, NegID, _, _, _), _). */