Figure 4

Restricted search of the space of source combinations. The heuristics described in Section ‘Details on the information sharing protocol - Restricting the search space’ is illustrated. In this example, we assume 4 subtypes A, B, C, and D. In each line a source combination is given, with the source combination in each ${\bar{S}}_i$ being grouped. The most likely source combinations in each $\overline{S_i}$ is colored in red. The arrows indicate how the spaces ${\bar{S}}_1,\dots ,{\bar{S}}_4$ are traversed during the search process.