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Proof step 2 from proof empty (previous step)

# st = 0 ⊦ st = ∅

Heuristic structural induction applied rule structural induction

And obtained the following new goals

Proof step 3:
# st0 = 0 → st0 = ∅, # st0[a, d] = 0 ⊦ st0[a, d] = ∅

Rule argument

term: st

Additional information

Used simplifier rules: gen-04: ⊦ ;