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Proof step 60 from proof readpage-prepost (previous step)

# buf = VFS_PAGE_SIZE, ((m0 =>mkfile(n0, md, m, σ) * F))(files), afs-cons(dirs, files), m0 ∈ files ⊦ [choose err0 with ⌊err0⌋ in err := err0] (err = ESUCCESS ∧ ⌜buf⌝ = (σ from n * VFS_PAGE_SIZE) to VFS_PAGE_SIZE ∨ ⌊err⌋ )

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Proof step 61:
# buf = VFS_PAGE_SIZE, ((m0 =>mkfile(n0, md, m, σ) * F))(files), afs-cons(dirs, files), m0 ∈ files, ⌊err0⌋ ⊦ [err := err0] (err = ESUCCESS ∧ ⌜buf⌝ = (σ from n * VFS_PAGE_SIZE) to VFS_PAGE_SIZE ∨ ⌊err⌋ )

Proof step 60 from proof readpage-prepost (previous step)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

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