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Proof step 242 from proof eq-io-truncate (previous step)

⟨fail#(; ; err)⟩ (err = err1), boolvar ↔ boolvar0, asynced ↔ asynced1, files1[m] = mkfile(m0, md0, m1, content), buf-opt = buf-opt0, dirs = dirs1, dirs = dirs0, err1 = err0, files = files1, files = files0, inode = mkinode(m, md, false, m1, 0, m2), inode = p_inode, n = n0, pageno = 0, pageno = pageno4, pageno0 = 0, pageno0 = pageno2, pageno1 = m2 / VFS_PAGE_SIZE, m ∈ files1, buf-opt.some? → # buf-opt.buf = VFS_PAGE_SIZE ⊦ ⟨afs_truncate#(n0, m2 / VFS_PAGE_SIZE; buf-opt, inode, boolvar, err, dirs1, files1, boolvar2)⟩ (buf-opt = buf-opt0 ∧ inode = p_inode ∧ (boolvar ↔ boolvar0) ∧ err = err0 ∧ dirs1 = dirs0 ∧ files1 = files0), VFS_PAGE_SIZE = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 243:
⟨fail#(; ; err)⟩ (err = err0), boolvar ↔ boolvar0, files1[m] = mkfile(m0, md0, m1, content), buf-opt = buf-opt0, dirs0 = dirs1, files0 = files1, inode = mkinode(m, md, false, m1, 0, m2), m ∈ files1, buf-opt0.some? → # buf-opt0.buf = VFS_PAGE_SIZE ⊦ ⟨afs_truncate#(n0, m2 / VFS_PAGE_SIZE; buf-opt, inode, boolvar, err, dirs1, files1, boolvar2)⟩ (buf-opt = buf-opt0 ∧ inode = mkinode(m, md, false, m1, 0, m2) ∧ (boolvar ↔ boolvar0) ∧ err = err0 ∧ dirs1 = dirs0 ∧ files1 = files0)

Rule argument

Additional information

Used simplifier rules: ⊦ VFS_PAGE_SIZE ≠ 0; (s)