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Proof step 37 from proof eq-io-truncate (previous step)

⟨files := files[ino, files[ino].size:= inode.size][ino, files[ino, files[ino].size:= inode.size][ino].meta:= inode.meta]⟩ (dirs = dirs0 ∧ files = files0), # buf-opt.buf = VFS_PAGE_SIZE, VFS_PAGE_SIZE = n1 + m2 % VFS_PAGE_SIZE, files1[m] = mkfile(m0, md0, m1, content0), dirs = dirs1, files = files1[m, mkfile(m0, md0, m1, content0[m2 / VFS_PAGE_SIZE, fill(buf-opt.buf, zero, m2 % VFS_PAGE_SIZE, n1)] upto m2)], ino = inode.ino, inode = mkinode(m, md, false, m1, 0, n0), inode0 = mkinode(m, md, false, m1, 0, m2), some(fill(buf-opt.buf, zero, m2 % VFS_PAGE_SIZE, n1)) = buf-opt0, buf-opt.some?, ino ∈ files, m ∈ files1, m2 ≤ n0 ⊦ ⟨afs_truncate#(n0, m2 / VFS_PAGE_SIZE; buf-opt, inode0, boolvar1, err, dirs1, files1, boolvar2)⟩ ( buf-opt = buf-opt0 ∧ inode0 = (m ∈ dirs0 ⊃ mkinode(m, dirs0[m].meta, true, dirs0[m].nlink, dirs0[m].nsubdirs, dirs0[m].size) ;mkinode(m, files0[m].meta, false, files0[m].nlink, 0, files0[m].size) ) ∧ boolvar1 ∧ err = ESUCCESS ∧ dirs1 = dirs0 ∧ files1 = files0), m2 % VFS_PAGE_SIZE = 0

Heuristic symbolic execution applied rule assign left

And obtained the following new goals

Rule argument

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