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Proof step 30 from proof inv-truncate (previous step)

isdir ↔ false, err = (inode.directory ⊃ EISDIR;ENOTDIR), err0 = ESUCCESS, err1 = ESUCCESS, ino = ino0, inode = getinode(ino, dirs, files), mode = MODE_W, pageno = 0, afs-cons(dirs, files), ispath(p, ROOT_INO, ino0, dirs, files), of-cons(of, dirs, files), pre-iget(ino, dirs, files), px-parent(user, p, ROOT_INO, dirs, files) ⊦ ⟪if err = ESUCCESS then {buf-opt := none; afs_truncate#(n, pageno; buf-opt, inode, isdir0, err, dirs, files, asynced)}⟫ (of-cons(of, dirs, files) ∧ afs-cons(dirs, files)), inode.directory ↔ isdir

Heuristic symbolic execution applied rule if negative right

And obtained the following new goals

Proof step 31:
isdir ↔ false, err = (inode.directory ⊃ EISDIR;ENOTDIR), err0 = ESUCCESS, err1 = ESUCCESS, ino = ino0, inode = getinode(ino, dirs, files), mode = MODE_W, pageno = 0, afs-cons(dirs, files), ispath(p, ROOT_INO, ino0, dirs, files), of-cons(of, dirs, files), pre-iget(ino, dirs, files), px-parent(user, p, ROOT_INO, dirs, files) ⊦ ⟪skip⟫ (of-cons(of, dirs, files) ∧ afs-cons(dirs, files)), inode.directory ↔ isdir

Rule argument

Additional information

Used simplifier rules: ⊦ ESUCCESS ≠ EISDIR; (s)% ⊦ ESUCCESS ≠ ENOTDIR; (s)