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Proof step 10 from proof eq-io-readpage (previous step)

⟨afs_readpage#(mkinode(m, md, boolvar, m0, m1, m2), pageno0, dirs1, files1, asynced0; buf, err)⟩ (buf = buf0 ∧ err = err0), # buf = VFS_PAGE_SIZE, files1[m] = mkfile(m3, md0, m4, content), m ∈ files1 ⊦ ⟨fail#(; ; err)⟩ (buf = buf0 ∧ err = err0), ⟨if pageno0 ∈ content then buf := content[pageno0] else buf := zeropage; err := ESUCCESS⟩ (buf = buf0 ∧ err = err0)

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 11:
⟨afs_readpage#(mkinode(m, md, boolvar, m0, m1, m2), pageno0, dirs1, files1, asynced0; buf, err)⟩ (buf = buf0 ∧ err = err0), # buf = VFS_PAGE_SIZE, files1[m] = mkfile(m3, md0, m4, content), m ∈ files1 ⊦ ⟨choose err0 with ⌊err0⌋ in err := err0⟩ (buf = buf0 ∧ err = err0), ⟨if pageno0 ∈ content then buf := content[pageno0] else buf := zeropage; err := ESUCCESS⟩ (buf = buf0 ∧ err = err0)

Rule argument

pos: right 1

Additional information

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