Improved WD Support. To improve generated WD lemmas, the generating algorithm has not been changed (to ensure safety) but enhanced by a back-end that simplifies the generated lemma after the fact. The enhancement consists in removing all sub-predicates that are subsumed within the ▇▇ ▇▇▇▇▇. Also, as WD lemmas were changing between two releases of the platform, the automated proof replay mechanism needed to better tackle changes in proof obligations (when they get simpler). This allows user to retain their proof status, although proof obligations have changed. As concerns automated support, it has been chosen not to add new reasoners (to avoid expanding the trusted base of the sequent prover) but rather to work on the outside by adding new tactics that schedule the existing reasoners to discharge the WD subgoals. This approach also allowed to start introducing speculative reasoning within tactics (attempt proofs).
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Sources: Grant Agreement, Grant Agreement