Choices / Decisions. For constraint-based deadlock checking we had the choice of either generating the deadlock freedom proof obligation with ProB or using ProB as a disprover on a generated proof obligation. Currently, the core of Rodin does not generate the deadlock freedom proof obligation. The flow plugin can be used to generate deadlock freedom proof obligations. The advantage, however, of generating them within ProB are the following: • ProB knows which parts of the axioms are theorems (and can thus be ignored; they are often added for simplifying proof but can make constraint solving more difficult) • the techniques can also be applied to classical B For record detection we decided not to use any potential "hints" provided by the records plugin, but infer the information from the axioms. In this way, the improvement can also be applied to records generated manually (as was the case in the Bosch case study) or in a classical B setting.
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Sources: Grant Agreement, Grant Agreement