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Proof step 2 from proof inv-create (previous step)

root.dir?, fids-cons(root, fs, ofh) ⊦ ⟪posix_create#(path, md, user, ofh; err, root, fs; psynced)⟫ (root.dir? ∧ fids-cons(root, fs, ofh))

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 3:
⊦
Proof step 4:
err0 = err, root.dir?, fids-cons(root, fs, ofh) ⊦ ⟪choose err with pre-create(path, md, err, user, root, fs, ofh) in err0 := err; if err0 = ESUCCESS then choose fid with ¬ fid ∈ fs in {root[path] := fnode(fid); fs[fid] := mkfile(md, mkbuf(0))}; psynced := ?⟫ (root.dir? ∧ fids-cons(root, fs, ofh))

Rule argument

pos: right 1

Additional information

Used simplifier rules: create: ⊦ ;