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Proof step 7 from proof readpage-get (previous step)

files[m] = mkfile(m3, md0, m4, content), inode = mkinode(m, md, boolvar, m0, m1, m2), pageno = n, pre-readpage(inode, pageno, buf, dirs, files) ⊦ [{if pageno ∈ files[inode.ino].content then buf := files[inode.ino].content[pageno] else buf := zeropage; err := ESUCCESS} or fail#(; ; err)] (err = ESUCCESS ∧ buf = getpage(n, content) ∨ ⌊err⌋ )

Heuristic conditional right split applied rule or split right

And obtained the following new goals

Proof step 8:
files[m] = mkfile(m3, md0, m4, content), inode = mkinode(m, md, boolvar, m0, m1, m2), pageno = n, pre-readpage(inode, pageno, buf, dirs, files) ⊦ [if pageno ∈ files[inode.ino].content then buf := files[inode.ino].content[pageno] else buf := zeropage; err := ESUCCESS] (err = ESUCCESS ∧ buf = getpage(n, content) ∨ ⌊err⌋ )
Proof step 19:
files[m] = mkfile(m3, md0, m4, content), inode = mkinode(m, md, boolvar, m0, m1, m2), pageno = n, pre-readpage(inode, pageno, buf, dirs, files) ⊦ [fail#(; ; err)] (err = ESUCCESS ∧ buf = getpage(n, content) ∨ ⌊err⌋ )

Proof step 7 from proof readpage-get (previous step)

Heuristic conditional right split applied rule or split right

And obtained the following new goals

Rule argument

Additional information