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Proof step 1 from proof inv-format (conclusion)

m = LEB_SIZE ⊦ ⟪posix_format#(n, psynced, m, md; ; root, fs, ofh, psynced0, err)⟫ (err = ESUCCESS → psynced0 ∧ root.dir? ∧ fids-cons(root, fs, ofh))

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 2:
⊦
Proof step 3:
psynced0 ↔ psynced, m = LEB_SIZE ⊦ ⟪if m = LEB_SIZE then { root := dnode(md, ∅), fs := ∅, ofh := ∅, psynced := true, err0 := ESUCCESS or {root := ?, fs := ?, ofh := ?, psynced := ?; choose err with ⌊err⌋ in err0 := err}} else abort⟫ (err0 = ESUCCESS → psynced ∧ root.dir? ∧ fids-cons(root, fs, ofh))

Rule argument

pos: right 1

Additional information

Used simplifier rules: format: ⊦ ;