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Proof step 52 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) ⊦ m ∈ files1 ∧ # buf = VFS_PAGE_SIZE

Heuristic unfold applied rule call left

And obtained the following new goals

Proof step 53:
⟨if pre-readpage(inode, pageno, buf, dirs, files) then { {if pageno ∈ files[inode.ino].content then buf := files[inode.ino].content[pageno] else buf := zeropage; err := ESUCCESS} or fail#(; ; err)} else abort⟩ (buf = buf0 ∧ err = err0), asynced ↔ asynced0, dirs = dirs1, files = files1, inode = mkinode(m, md, boolvar, m0, m1, m2), pageno = pageno0 ⊦ m ∈ files1 ∧ # buf = VFS_PAGE_SIZE

Rule argument

pos: left 1

Additional information

Used simplifier rules: afs_readpage#(INODE, PAGENO, DIRS, FILES, ASYNCED; PBUF, ERR) {if pre-readpage(INODE, PAGENO, PBUF, DIRS, FILES) then { {if PAGENO ∈ FILES[INODE.ino].content then PBUF := FILES[INODE.ino].content[PAGENO] else PBUF := zeropage; ERR := ESUCCESS} or fail#(; ; ERR)} else abort };