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Proof step 7 from proof crash-neutral-truncate (previous step)

files[m] = mkfile(m0, md0, # links(m, dirs), content), asynced, dirs0 = dirs \ orphans(dirs, files), files0 = files \ orphans(dirs, files), inode = mkinode(m, md, false, # links(m, dirs), 0, m2), afs-cons(dirs, files), m ∈ files, buf-opt.some? → # buf-opt.buf = VFS_PAGE_SIZE ⊦ ⟨afs_truncate#(n, m2 / VFS_PAGE_SIZE; buf-opt, inode, asynced0, err, dirs, files, asynced)⟩ (asynced ∧ dirs0 = dirs \ orphans(dirs, files) ∧ files0 = files \ orphans(dirs, files))

User applied rule call right

And obtained the following new goals

Proof step 8:
files[m] = mkfile(m0, md0, # links(m, dirs), content), asynced, dirs0 = dirs \ orphans(dirs, files), files0 = files \ orphans(dirs, files), inode = mkinode(m, md, false, # links(m, dirs), 0, m2), pageno = m2 / VFS_PAGE_SIZE, afs-cons(dirs, files), m ∈ files, buf-opt.some? → # buf-opt.buf = VFS_PAGE_SIZE ⊦ ⟨if pre-truncate(inode, n, pageno, buf-opt, dirs, files) then let old_ino0 = 0, old_ino = 0 in afs_truncate_internal#(n, pageno; inode, buf-opt, old_ino0, old_ino, asynced0, err, dirs, files; asynced) else abort⟩ (asynced ∧ dirs0 = dirs \ orphans(dirs, files) ∧ files0 = files \ orphans(dirs, files)), VFS_PAGE_SIZE = 0

Rule argument

pos: right 1

Additional information

Used simplifier rules: truncate: ⊦ ;% ⊦ VFS_PAGE_SIZE ≠ 0; (s)