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Proof step 25 from proof truncate-empty (previous step)

files[ino0] = mkfile(m, md0, # links(ino0, dirs), content0), buf-opt = none, content = files[inode.ino].content, ino = inode.ino, inode = mkinode(ino0, md1, false, # links(ino0, dirs), 0, n), old_ino = min(n, inode.size), old_ino0 = inode.size % VFS_PAGE_SIZE, old_ino1 = 0, old_ino2 = 0, pageno = n / VFS_PAGE_SIZE, afs-cons(dirs, files), pageno ∈ files[ino].content, ino0 ∈ files, inode.size ≤ n, old_ino0 + (VFS_PAGE_SIZE - old_ino0) ≤ # files[ino].content[pageno], VFS_PAGE_SIZE ≥ old_ino0, pageno ∈ content ∨ buf-opt.some? ⊦ [let new_inode = inode in {new_inode.size := n; files0 := files[ino, files[ino].content:= (content[pageno, fill(files[ino].content[pageno], zero, old_ino0, VFS_PAGE_SIZE - old_ino0)] upto old_ino)]; afs_inode_sync#(new_inode; dirs, files0)}; inode := getinode(inode.ino, dirs, files0); err := ESUCCESS; asynced := ?] (err = ESUCCESS → files0[ino0].content.stream from n = σ⊥), VFS_PAGE_SIZE = 0, old_ino0 = 0

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Rule argument

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