Formal Modelling of PBFT Consensus Algorithm in Event-B

Table 2

Proof statistics.

Model	Number of proof obligations	Automatically discharged	Interactively discharged
Context	7	3	4
Initial model	45	15	30
1^st refinement	44	34	10
2^nd refinement	87	52	35
3^rd refinement	36	19	17
Total	219	123	96