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Proof step 40 from proof refine-readpage (previous step)

# buf0 = VFS_PAGE_SIZE, fs[ri[datakey(m, pageno)]] = datanode(key, buf1), copy(buf1, 0, buf0, 0, VFS_PAGE_SIZE) ≠ buf1, orphans(fs, ri).inodes?, fo.inodes?, afs-cons(abs-dirs(fs, ri), abs-files(fs, ri)), file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, orphans(fs, ri)), replay-cons-strong(fs, ri, orphans(fs, ri), fi, fo, log), ri-inj(ri), ri-inj(fi), ubifs-cons(fs, ri, orphans(fs, ri), fi, fo, log), inodekey(m) ∈ ri, datakey(m, pageno) ∈ ri, ri[datakey(m, pageno)] ∈ fs, ¬ fs[ri[inodekey(m)]].directory, asynced → boolvar2 ⊦ ∃ err0. ⌊err0⌋ ∧ ⟨err := err0⟩ ((asynced → boolvar2) ∧ copy(buf1, 0, buf0, 0, VFS_PAGE_SIZE) = buf0 ∧ ESUCCESS = err)

User applied rule weakening

And obtained the following new goals

Rule argument

poslist: right 1

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