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Proof step 818 from proof refine-truncate (previous step)

boolvar1 ↔ boolvar2, boolvar ↔ boolvar2, VFS_PAGE_SIZE = n0 + m2 % VFS_PAGE_SIZE, fs[ri[inodekey(m)]] = inodenode(key, md0, false, m3, 0, m5), fs[ri[datakey(m, m2 / VFS_PAGE_SIZE)]] = datanode(key0, buf), buf-opt = buf-opt0, buf-opt1 = buf-opt0, dirs = abs-dirs(fs, ri), err = err1, files = abs-files(fs, ri), inode = p_inode, p_inode = mkinode(m, md, false, m3, 0, m2), pageno1 = m2 / VFS_PAGE_SIZE, key0.data?, orphans(fs, ri).inodes?, fo.inodes?, afs-cons(abs-dirs(fs, ri), abs-files(fs, ri)), file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, orphans(fs, ri)), pre-truncate(inode, n, pageno1, buf-opt, dirs, files), replay-cons-strong(fs, ri, orphans(fs, ri), fi, fo, log), ri-cons(ri, fs), ri-inj(ri), ri-inj(fi), ubifs-cons(fs, ri, orphans(fs, ri), fi, fo, log), datakey(m, m2 / VFS_PAGE_SIZE) ∈ ri, ri[datakey(m, m2 / VFS_PAGE_SIZE)] ∈ fs, inodekey(m) ∈ ri, ri[inodekey(m)] ∈ fs, m2 ≤ n, ⌊err0⌋ , asynced → boolvar0 ⊦ ⟨let pageno0 = 0, pageno = 0 in afs_truncate_internal#(n, pageno1; inode, buf-opt, pageno0, pageno, boolvar, err, dirs, files; asynced)⟩ ( dirs = abs-dirs(fs, ri) ∧ files = abs-files(fs, ri) ∧ (asynced → boolvar4) ∧ buf-opt1 = buf-opt ∧ mkinode(m, md, false, m3, 0, m2) = inode ∧ (boolvar1 ↔ boolvar) ∧ err0 = err), m2 % VFS_PAGE_SIZE = 0, VFS_PAGE_SIZE = 0, m = 0, buf-opt0.some?

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Rule argument

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