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Proof step 14 from proof crash-exists-h (previous step)

dnode(md, sdt) = tree0, ∀ str. str ∈ sdt → (∀ fs0. ∃ fs1. (∀ fid. fid ∈ fs1 ↔ fid ∈ sdt[str].fids ∧ fid ∈ fs0) ∧ (∀ fid. fid ∈ fs1 → fs1[fid] = fs0[fid])) ⊦ ∃ fs1. (∀ fid0. fid0 ∈ fs1 ↔ fid0 ∈ sdt.fids ∧ fid0 ∈ fs0) ∧ (∀ fid. fid ∈ fs1 → fs1[fid] = fs0[fid])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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