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Proof step 59 from proof fits-subset (previous step)

st0 ⊆ st, fits(r, sks, st) ⊦ junkref(str, r, st0), fits(r, sks, st0)

User applied rule structural induction

And obtained the following new goals

Proof step 1:
⊦ fits(r, [], st)
Proof step 58:
∀ st0, st, r, str. st0 ⊆ st ∧ fits(r, sks0, st) → junkref(str, r, st0) ∨ fits(r, sks0, st0), st0 ⊆ st, fits(r, sk + sks0, st) ⊦ junkref(str, r, st0), fits(r, sk + sks0, st0)

Rule argument

[VARWITHVARSEQSARG : sks, ()]

Additional information

[[CONCRETESIMPRULES : ([CSIMPGEN : storekeys generated by [], +;])]]