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Proof step 56 from proof fits-superset (previous step)

∀ 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)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 55:
st ⊆ st0, fits(r, sk ' + sks0, st), ∀ st, st0, r, str. st ⊆ st0 ∧ fits(r, sks0, st) → junkref(str, r, st) ∨ fits(r, sks0, st0) ⊦ junkref(str, r, st), fits(r, sk ' + sks0, st0)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ sk + sks = sk ' + sks])]]