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Proof step 243 from proof eq-io-truncate (previous step)

⟨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)

Heuristic unfold applied rule call left

And obtained the following new goals

Proof step 244:
⟨choose err0 with ⌊err0⌋ in err := err0⟩ (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

pos: left 1

Additional information

Used simplifier rules: fail#(; ; ERR){choose ERR0 with ⌊ERR0⌋ in ERR := ERR0};