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Proof step 36 from proof initialization (previous step)

⌊err⌋ ⊦ ⟨psynced := isdir, ofh := ofh1, fs := fs1, root := tree; choose err with ⌊err⌋ in err0 := err⟩ (tree = root ∧ fs1 = fs ∧ ofh1 = ofh ∧ (isdir ↔ psynced) ∧ err = err0)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 37:
psynced ↔ isdir, fs = fs1, ofh = ofh1, root = tree, ⌊err⌋ ⊦ ⟨choose err with ⌊err⌋ in err0 := err⟩ (tree = root ∧ fs1 = fs ∧ ofh1 = ofh ∧ (isdir ↔ psynced) ∧ err = err0)

Proof step 36 from proof initialization (previous step)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information