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Proof step 4 from proof links-del-entry (previous step)

ino0 ∈ dirs, str ∈ entries ⊦ links(ino, dirs[ino0, mkdir(m, md, n0, n1, entries -- str)]) = (str ∈ entries ∧ entries[str] = ino ⊃ links(entries[str], dirs[ino0, mkdir(m, md, n0, n1, entries)]) -- mklink(ino0, str) ;links(ino, dirs[ino0, mkdir(m, md, n0, n1, entries)]) )

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
str ∈ entries, ino0 ∈ dirs ⊦ links(ino, dirs[ino0, mkdir(m, md, n0, n1, entries -- str)]) = (entries[str] = ino ⊃ links(entries[str], dirs[ino0, mkdir(m, md, n0, n1, entries)]) -- mklink(ino0, str) ;links(ino, dirs[ino0, mkdir(m, md, n0, n1, entries)]) )

Proof step 4 from proof links-del-entry (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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