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Proof step 7 from proof inv-readpage (previous step)

# buf = VFS_PAGE_SIZE, boolvar0 ↔ boolvar, inode = mkinode(m, md, boolvar1, m0, m1, m2), ro.inodes?, fo.inodes?, file-node-cons(fs, ri), log-cons(log, fs), orphans-cons(fs, ri, ro), replay-cons-strong(fs, ri, ro, fi, fo, log), ri-inj(ri), ri-inj(fi), ubifs-cons(fs, ri, ro, fi, fo, log), inodekey(m) ∈ ri ⊦ ⟪choose key, boolvar, nd with true in {err := ESUCCESS; key := datakey(inode.ino, pageno); aubifs_core_index_lookup#(key, ri, fi, ro, fo, fs, log, boolvar0; boolvar, nd; err); if err = ESUCCESS then if boolvar then buf := copy(nd.data, 0, buf, 0, VFS_PAGE_SIZE) else buf := fill(buf, zero)}⟫ true, fs[ri[inodekey(m)]].directory

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

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