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Proof step 309 from proof refine-truncate (previous step)

# buf-opt0.buf = VFS_PAGE_SIZE, boolvar3 ↔ boolvar2, boolvar ↔ boolvar2, 0 = fs[ri[inodekey(m)]].nsubdirs, VFS_PAGE_SIZE = n0 + m2 % VFS_PAGE_SIZE, buf-opt = buf-opt0, buf-opt1 = buf-opt0, dirs = abs-dirs(fs, ri), err = err0, files = abs-files(fs, ri), inode = p_inode, p_inode = mkinode(m, md, false, fs[ri[inodekey(m)]].nlink, 0, m2), pageno1 = m2 / VFS_PAGE_SIZE, fo.inodes?, orphans(fs, ri).inodes?, buf-opt0.some?, 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-inj(fi), ri-inj(ri), ubifs-cons(fs, ri, orphans(fs, ri), fi, fo, log), inodekey(m) ∈ ri, m2 ≤ n, asynced → boolvar0, ∀ adr1, adr2, adr3. adr1 ∈ fs ∨ adr2 ∈ fs ∨ adr3 ∈ fs ∨ adr1 = adr2 ∨ adr1 = adr3 ∨ adr2 = adr3 ⊦ ⟨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, fs[ri[inodekey(m)]].nlink, 0, m2) = inode ∧ (boolvar3 ↔ boolvar) ∧ ENOSPC = err), m2 % VFS_PAGE_SIZE = 0, VFS_PAGE_SIZE = 0, fs[ri[inodekey(m)]].directory

Heuristic symbolic execution applied rule let right

And obtained the following new goals

Rule argument

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