[Imprint][Data Privacy Statement][E-Mail]



View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 39 from proof inv-truncate-buff-some (previous step)

# buf-opt.buf = VFS_PAGE_SIZE, asynced0 ↔ inode.size ≤ n ∧ old_ino ≠ 0 ∧ (pageno ∈ content ∨ buf-opt.some?), files[m] = mkfile(m1, md1, # links(m, dirs), content0), asynced0, content = files[inode.ino].content, err = ESUCCESS, ino = inode.ino, inode = mkinode(m, md, false, # links(m, dirs), 0, m2), old_ino = inode.size % VFS_PAGE_SIZE, old_ino0 = 0, pageno = m2 / VFS_PAGE_SIZE, size = min(n, inode.size), size0 = 0, buf-opt.some?, afs-cons(dirs, files), dcache-cons(dcache, dirs, files), icache-cons(icache, dirs, files), pcache-cons(pcache, dirs, files), synced(dirs, icache, pcache), m ∈ files, old_ino + (VFS_PAGE_SIZE - old_ino) ≤ # buf-opt.buf, VFS_PAGE_SIZE ≥ old_ino, asynced1 → synced(files, icache, pcache) ⊦ [files[ino].content := content[pageno, fill(buf-opt.buf, zero, old_ino, VFS_PAGE_SIZE - old_ino)] upto size; let new_inode = inode in {new_inode.size := n; afs_inode_sync#(new_inode; dirs, files)}; inode := getinode(inode.ino, dirs, files); err := ESUCCESS; asynced := ?] ( afs-cons(dirs, files) → ⟪if err = ESUCCESS then let asynced = false in {icache_set#(inode, asynced; err, icache); pcache_truncate#(inode.ino, m2, n; err, pcache); if asynced0 then pcache_set# (inode.ino, m2 / VFS_PAGE_SIZE, some(fill(buf-opt.buf, zero, old_ino, VFS_PAGE_SIZE - old_ino)).buf, asynced; err, pcache)}; skip⟫ ( icache-cons(icache, dirs, files) ∧ dcache-cons(dcache, dirs, files) ∧ pcache-cons(pcache, dirs, files) ∧ synced(dirs, icache, pcache) ∧ (asynced1 → synced(files, icache, pcache)))), VFS_PAGE_SIZE = 0

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

Additional information