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Proof step 23 from proof write-loop-err (previous step)

VFS_PAGE_SIZE = n0 + (ino2 + ino0) % VFS_PAGE_SIZE, buf = mkbuf(VFS_PAGE_SIZE), err = ESUCCESS, pageno = (ino2 + ino0) / VFS_PAGE_SIZE, pre-readpage(inode, pageno, buf, dirs, files), pageno ∈ files[inode.ino].content, ino2 + ino0 ≤ ino1 ⊦ [buf := files[inode.ino].content[pageno]; err := ESUCCESS; if err = ESUCCESS then afs_check_commit#(dirs, files; err; asynced); if err = ESUCCESS then {buf := copy(buf0, ino0, buf, (ino2 + ino0) % VFS_PAGE_SIZE, min(ino1 - ino2 + ino0, n0)); afs_writepage#(inode, (ino2 + ino0) / VFS_PAGE_SIZE, buf, dirs; err, files; asynced)}; if err = ESUCCESS then ino3 := ino0 + min(ino1 - ino2 + ino0, n0)] (err = ESUCCESS ∨ ⌊err⌋ ), VFS_PAGE_SIZE = 0, min(ino1 - ino2 + ino0, n0) = 0

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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