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Proof step 57 from proof fits-superset (previous step)

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

User applied rule structural induction

And obtained the following new goals

Proof step 1:
⊦ fits(r, [], st)
Proof step 56:
∀ st, st0, r, str. st ⊆ st0 ∧ fits(r, sks0, st) → junkref(str, r, st) ∨ fits(r, sks0, st0), st ⊆ st0, fits(r, sk + sks0, st) ⊦ junkref(str, r, st), fits(r, sk + sks0, st0)

Rule argument

[VARWITHVARSEQSARG : sks, ()]

Additional information

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