Agree Research Area
Here, "research area" means something rather more specific than (say) Neuroinformatics, Natural Language Processing, Automated Reasoning, Compiler Optimisation, Computer Vision or Computer Security. If there is a conference with a title such as "Symposium on X" then X is not specific enough to be a research area in the sense referred to here.
By the end of Month 4 at the latest, student and supervisors should have converged on a research area on which to focus in the search for a thesis topic. Some students will already have made this decision before arrival and all that is necessary at this point is to confirm the decision.