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Proof step 19 from proof inv-read (previous step)

of[fd] = mkfile(m, mode, m0), err = ESUCCESS, ino = m, dom of < ino2, afs-cons(dirs, files), of-cons(of, dirs, files), fd ∈ of, n ≤ # buf, mode ≠ MODE_R → fd ∈ of ⊦ ⟪if getinode(ino, dirs, files).directory then err := EISDIR else let ino1 = m0, ino0 = m0 + n, ino3 = 0 in if ino1 ≤ getinode(ino, dirs, files).size then {let isdir = false in {err := ESUCCESS; vfs_read_loop#(ino1, ino0, getinode(ino, dirs, files), isdir, dirs, files, asynced; buf, ino3, err)}; if ino3 ≠ 0 then err := ESUCCESS; of[fd].pos := of[fd].pos + ino3; n := ino3} else n := 0⟫ (of-cons(of, dirs, files) ∧ dom of < ino2), mode ≠ MODE_R ∧ mode ≠ MODE_RW

Heuristic symbolic execution applied rule if negative right

And obtained the following new goals

Proof step 20:
of[fd] = mkfile(m, mode, m0), err = ESUCCESS, ino = m, dom of < ino2, afs-cons(dirs, files), of-cons(of, dirs, files), fd ∈ of, n ≤ # buf, mode ≠ MODE_R → fd ∈ of ⊦ ⟪let ino1 = m0, ino0 = m0 + n, ino3 = 0 in if ino1 ≤ getinode(ino, dirs, files).size then {let isdir = false in {err := ESUCCESS; vfs_read_loop#(ino1, ino0, getinode(ino, dirs, files), isdir, dirs, files, asynced; buf, ino3, err)}; if ino3 ≠ 0 then err := ESUCCESS; of[fd].pos := of[fd].pos + ino3; n := ino3} else n := 0⟫ (of-cons(of, dirs, files) ∧ dom of < ino2), mode ≠ MODE_R ∧ mode ≠ MODE_RW

Rule argument

pos: right 1

Additional information

Used simplifier rules: ⊦ getinode(ino, dirs, files) = (ino ∈ dirs ⊃ mkinode (ino, dirs[ino].meta, true, dirs[ino].nlink, dirs[ino].nsubdirs, dirs[ino].size) ;mkinode (ino, files[ino].meta, false, files[ino].nlink, 0, files[ino].size) ); (s)%⊦ of-cons(of, dirs, files) ∧ fd ∈ of ∧ of[fd] = mkfile(ino, mode, n) ∧ afs-cons(dirs, files) → ¬ ino ∈ dirs; (s)% ⊦ mkinode(m, md, boolvar, m0, m1, m2).directory ↔ boolvar; (s)