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Proof step 20 from proof inv-writepage (previous step)

# buf = VFS_PAGE_SIZE, err = ESUCCESS, inode = mkinode(m, md, boolvar, m0, m1, m2), afs-cons(dirs, files), dcache-cons(dcache, dirs, files), icache-cons(icache, dirs, files), pcache-cons(pcache, dirs, files), synced(files, icache, pcache), synced(dirs, icache, pcache), m ∈ files ⊦ [asynced := ?] ( afs-cons(dirs, files[inode.ino, files[inode.ino].content:= files[inode.ino].content[pageno, buf]]) → ⟪asynced2 := false; if err = ESUCCESS then pcache_set#(m, pageno, buf, asynced2; err, pcache)⟫ ( icache-cons(icache, dirs, files[inode.ino, files[inode.ino].content:= files[inode.ino].content[pageno, buf]]) ∧ dcache-cons(dcache, dirs, files[inode.ino, files[inode.ino].content:= files[inode.ino].content[pageno, buf]]) ∧ pcache-cons(pcache, dirs, files[inode.ino, files[inode.ino].content:= files[inode.ino].content[pageno, buf]]) ∧ synced(dirs, icache, pcache) ∧ synced(files[inode.ino, files[inode.ino].content:= files[inode.ino].content[pageno, buf]], icache, pcache)))

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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