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Proof step 263 from proof eq-io-truncate (previous step)

boolvar ↔ m2 ≤ n ∧ pageno0 ≠ 0 ∧ (m2 / VFS_PAGE_SIZE ∈ content ∨ buf-opt0.some?), files1[m] = mkfile(m3, md1, m4, content0), content = content0, ino = m, pageno = min(n, m2), pageno0 = m2 % VFS_PAGE_SIZE, m ∈ files1, ⌊err1⌋ , buf-opt0.some? → # buf-opt0.buf = VFS_PAGE_SIZE, m2 ≤ n → pageno0 ≠ 0 → VFS_PAGE_SIZE ≠ 0 ⊦ ⟨files := files1; buf-opt := buf-opt0; if boolvar then {pageno1 := m2 / VFS_PAGE_SIZE; if buf-opt.some? then buf := buf-opt.buf else buf := files[ino].content[pageno1]; buf := fill(buf, zero, pageno0, VFS_PAGE_SIZE - pageno0); content[pageno1] := buf; buf-opt := some(buf)}; files[ino].content := content upto pageno; let new_inode = mkinode(m, md, false, m4, 0, m2) in {new_inode.size := n; dirs0 := dirs1; afs_inode_sync#(new_inode; dirs1, files)}; inode := (m ∈ dirs1 ⊃ mkinode(m, dirs1[m].meta, true, dirs1[m].nlink, dirs1[m].nsubdirs, dirs1[m].size) ;mkinode(m, files[m].meta, false, files[m].nlink, 0, files[m].size) ); err := ESUCCESS; asynced := ?⟩ (buf-opt = buf-opt0 ∧ inode = mkinode(m, md, false, m4, 0, m2) ∧ (boolvar ↔ boolvar0) ∧ err = err1 ∧ dirs1 = dirs0 ∧ files = files1), ⟨err := err1; asynced := ?⟩ (err = err1), VFS_PAGE_SIZE = 0

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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