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Proof step 1 from proof abs-files-gc-copy (conclusion)

# ax = # kx ⊦ new(ax, fs) ∧ kx.toSet ⊆ dom ri ∧ ¬ dups(kx) ∧ ¬ dups(ax) ∧ ri-cons(ri, fs) → abs-files(fs[ax, fs[ri[kx]]], ri[kx, ax]) = abs-files(fs, ri)

System applied rule normalize

And obtained the following new goals

Proof step 2:
# ax = # kx, new(ax, fs), ri-cons(ri, fs), kx.toSet ⊆ dom ri ⊦ abs-files(fs[ax, fs[ri[kx]]], ri[kx, ax]) = abs-files(fs, ri), dups(ax), dups(kx)

Proof step 1 from proof abs-files-gc-copy (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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