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Proof step 7 from proof crash-neutral-erase (previous step)

m < # avols[v], ebm-cons(avols0), ebm-cons(avols), v ∈ avols, avols ⊆ avols0 ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; if err = ESUCCESS then avols[v][m] := erased else {skip or avols[v][m] := unmapped}⟩ (avols ⊆ avols0)

User applied rule exists right

And obtained the following new goals

Proof step 8:
m < # avols[v], ebm-cons(avols), ebm-cons(avols0), v ∈ avols, avols ⊆ avols0 ⊦ (⌊EIO⌋ ∨ EIO = ESUCCESS) ∧ ⟨err := EIO; if err = ESUCCESS then avols[v][m] := erased else {skip or avols[v][m] := unmapped}⟩ (avols ⊆ avols0)

Rule argument

pos: right 1 terms: EIO abort: F discard: T computed: F

Additional information

Used terms: EIO