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Proof step 1 from proof inv-readdir (conclusion)

root.dir?, fids-cons(root, fs, ofh) ⊦ ⟪posix_readdir#(path, user, root, fs, ofh; strings, err)⟫ true

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 2:
⊦
Proof step 3:
err0 = err, root.dir?, fids-cons(root, fs, ofh) ⊦ ⟪choose err with pre-readdir(path, err, user, root, fs, ofh) in err0 := err; if err0 = ESUCCESS then strings := dom root[path].entries else strings := ?⟫ true

Rule argument

pos: right 1

Additional information

Used simplifier rules: readdir: ⊦ ;