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Proof step 1 from proof btree-inv-root-null (conclusion)

⊦ istore0 ⊑ istore ∧ btree-inv(null, adr, istore, istore0, zh, ri, fi) → ri = fi

System applied rule normalize

And obtained the following new goals

Proof step 2:
btree-inv(null, adr, istore, istore0, zh, ri, fi), istore0 ⊑ istore ⊦ ri = fi

Rule argument

Additional information