Cost Optimisation

[galvusdamor]

Does the plan optimiser support action costs?
From looking at the code (src/sat/plan_optimizer.cpp), it seems that the length of the plan - in terms of number of actions - is optimised.

[domschrei]

Hi Gregor,

you are correct, Lilotane only minimizes the number of actions (only if you use the option -of=-1, and by default just at the layer/depth where the initial plan was found). Handling integer-valued operator costs (i.e., cost that does not depend on an action's parameters) is something I've wanted to do for quite some time (it would be straight forward) but never got around to. Of course there's always the hacky approach to add k-1 dummy actions for each action of cost k ...

Are action/operator costs part of HDDL? Will they be? :)

[bhomaidan1990]

@domschrei are there any plans (in the near future) to support :action-costs by lilotane? thanks in advance.