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Proof step 26 from proof inv-writepage (previous step)

# buf = VFS_PAGE_SIZE, fo.inodes?, ro.inodes?, file-node-cons(fs0, ri), log-cons(log0, fs0), orphans-cons(fs0, ri, ro), replay-cons-strong(fs0, ri, ro, fi, fo, log0), ri-inj(fi), ri-inj(ri), ubifs-cons(fs0, ri, ro, fi, fo, log0), inodekey(m) ∈ ri ⊦ fs0[ri[inodekey(m)]].directory, adr1 ∈ fs0, ubifs-cons(fs0[adr1, datanode(datakey(m, pageno), buf)], ri[datakey(m, pageno), adr1], ro, fi, fo, log0 + adr1 ') ∧ replay-cons-strong(fs0[adr1, datanode(datakey(m, pageno), buf)], ri[datakey(m, pageno), adr1], ro, fi, fo, log0 + adr1 ') ∧ file-node-cons(fs0[adr1, datanode(datakey(m, pageno), buf)], ri[datakey(m, pageno), adr1]) ∧ orphans-cons(fs0[adr1, datanode(datakey(m, pageno), buf)], ri[datakey(m, pageno), adr1], ro)

User applied rule case distinction

And obtained the following new goals

Rule argument

pos: right 3

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