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Proof step 2 from proof inv-crash (previous step)

dirs = dirs0 \ orphans(dirs0, files), files0 = files \ orphans(dirs0, files), afs-cons(dirs0, files) ⊦ ⟪skip⟫ ((true → afs-cons(dirs, files0)) ∧ true)

Heuristic symbolic execution applied rule skip right

And obtained the following new goals

Proof step 3:
dirs = dirs0 \ orphans(dirs0, files), files0 = files \ orphans(dirs0, files), afs-cons(dirs0, files) ⊦ (true → afs-cons(dirs, files0)) ∧ true

Proof step 2 from proof inv-crash (previous step)

Heuristic symbolic execution applied rule skip right

And obtained the following new goals

Rule argument

Additional information