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Proof step 540 from proof refine-readpage (previous step)

# buf0 = VFS_PAGE_SIZE, asynced ↔ cache_asynced, buf = buf0, buf1 = buf0, dirs = cache_dirs, err = err1, files = (cache_files ⊕ cache_pcache) ⊕ cache_icache, inode = mkinode(m, md, boolvar, m0, m1, m2), afs-cons(cache_dirs, (cache_files ⊕ cache_pcache) ⊕ cache_icache), afs-cons(cache_dirs, cache_files), dcache-cons(cache_dcache, cache_dirs, cache_files), icache-cons(cache_icache, cache_dirs, cache_files), pcache-cons(cache_pcache, cache_dirs, cache_files), synced(cache_dirs, cache_icache, cache_pcache), m ∈ cache_files, ⌊err0⌋ , cache_sync → synced(cache_files, cache_icache, cache_pcache) ⊦ ⟨{if pageno ∈ files[inode.ino].content then buf := files[inode.ino].content[pageno] else buf := zeropage; err := ESUCCESS} or fail#(; ; err)⟩ (buf1 = buf ∧ err0 = err), datakey(m, pageno) ∈ cache_pcache

Heuristic symbolic execution applied rule or right

And obtained the following new goals

Rule argument

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