4. The processor-implemented method of claim 1 , wherein the generating of each cluster of each instance and respective leaf module includes performing a traversal of the hierarchical tree structure, upon visiting each respective leaf module the traversal generating the cluster that includes the action of the respective leaf module, and upon visiting each instance module the traversal generating the at least one cluster of the instance module.
5. The processor-implemented method of claim 4 , wherein the generating of the at least one cluster upon visiting each instance module includes merging the clusters of each child of the instance module.