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Proof step 3 from proof writepage-prepost (previous step)

files0 = files, inode = mkinode(m0, md0, boolvar, m2, m3, m4), ((m0 =>mkfile(n2, md, m1, σ) * F))(files), afs-cons(dirs, files), m0 ∈ files, m + n1 ≤ # buf, n0 + n1 ≤ VFS_PAGE_SIZE ⊦ [vfs_writepage#(inode, n, buf, m, n0, n1, dirs; err, files, asynced)] ( err = ESUCCESS ∧ ((m0 =>mkfile(n2, md, m1, (σ to n * VFS_PAGE_SIZE + n0) + ((⌜buf⌝ from m) to n1) + (σ from n * VFS_PAGE_SIZE + n0 + n1)) * F))(files) ∨ ⌊err⌋ ∧ files0 = files)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
files0 = files, ((m0 =>mkfile(n2, md, m1, σ) * F))(files), afs-cons(dirs, files), m0 ∈ files, n0 + n1 ≤ VFS_PAGE_SIZE, m + n1 ≤ # buf ⊦ [vfs_writepage#(mkinode(m0, md0, boolvar, m2, m3, m4), n, buf, m, n0, n1, dirs; err, files, asynced)] ( err = ESUCCESS ∧ ((m0 =>mkfile(n2, md, m1, (σ to n * VFS_PAGE_SIZE + n0) + ((⌜buf⌝ from m) to n1) + (σ from n * VFS_PAGE_SIZE + n0 + n1)) * F))(files) ∨ ⌊err⌋ ∧ files0 = files)

Proof step 3 from proof writepage-prepost (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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