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Proof step 31 from proof eq-io-readpage (previous step)

⟨fail#(; ; err)⟩ (err = err1), # buf0 = VFS_PAGE_SIZE, files1[m] = mkfile(m3, md0, m4, content), pageno0 ∈ content, m ∈ files1 ⊦ ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ (err = err1), content[pageno0] = buf0 ∧ ESUCCESS = err1

Heuristic unfold applied rule call left

And obtained the following new goals

Proof step 32:
⟨choose err0 with ⌊err0⌋ in err := err0⟩ (err = err1), # buf0 = VFS_PAGE_SIZE, files1[m] = mkfile(m3, md0, m4, content), m ∈ files1, pageno0 ∈ content ⊦ ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ (err = err1), content[pageno0] = buf0 ∧ ESUCCESS = err1

Rule argument

pos: left 1

Additional information

Used simplifier rules: fail#(; ; ERR){choose ERR0 with ⌊ERR0⌋ in ERR := ERR0};