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Unified SAS and PDDL meta encodings.

This commit is contained in:
Patrick Lühne 2016-08-13 11:09:15 +02:00
parent f2d3aee662
commit d4c168af30
2 changed files with 3 additions and 36 deletions
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3
encodings/sas-meta-sequential-incremental.lp → encodings/meta-sequential-incremental.lp
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@ -10,6 +10,9 @@
% Establish initial state
holds(Variable, Value, 0) :- initialState(Variable, Value).
% Make unspecified initial state variables false by default (for PDDL)
holds(variable(Variable), value(Variable, false), 0) :- variable(variable(Variable)), {initialState(variable(Variable), _)} 0.
#program step(t).
% Perform actions

36
encodings/pddl-meta-sequential-incremental.lp
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@ -1,36 +0,0 @@
#include <incmode>.
#program base.
% Establish initial state
holds(Variable, Value, 0) :- initialState(Variable, Value).
holds(variable(Variable), value(Variable, false), 0) :- variable(variable(Variable)), {initialState(variable(Variable), _)} 0.
#program step(t).
% Perform actions
1 {occurs(Action, t) : action(Action)} 1.
% Check preconditions
:- occurs(Action, t), precondition(Action, Variable, Value), not holds(Variable, Value, t - 1).
% Apply effects
caused(Variable, Value, t) :- occurs(Action, t), postcondition(Action, _, Variable, Value).
modified(Variable, t) :- caused(Variable, Value, t).
holds(Variable, Value, t) :- caused(Variable, Value, t).
holds(Variable, Value, t) :- holds(Variable, Value, t - 1), not modified(Variable, t).
% Check that variables have unique values
:- variable(Variable), not 1 {holds(Variable, Value, t) : contains(Variable, Value)} 1.
% Check mutexes
%:- mutexGroup(MutexGroup), not {holds(Variable, Value, t) : contains(MutexGroup, Variable, Value)} 1.
#program check(t).
% Verify that goal is met
:- query(t), goal(Variable, Value), not holds(Variable, Value, t).
#show query/1.
#show occurs/2.