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Proof step 25 from proof modify-sym (previous step)

r0 ∈ H0 ⊦ H0 = H0[r0, H0[r0]], r0 ∈ rs, ∃ r. ¬ r ∈ rs ∧ r ∈ H0 ∧ H0 = H0[r0, o] -- r, ∃ r. ¬ r ∈ rs ∧ r ≠ null ∧ ¬ r ∈ H0 ∧ H0 = H0[r0, o] ++ r

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 26:
r ∈ H ⊦ H[r] = o → H[r, o] = H

Rule argument

spec: heap name: write-again seq: r ∈ H ⊦ H[r] = o → H[r, o] = H subst: [o, r, H] → [H0[r0], r0, H0] flags: <all paths>

Additional information

Used terms: H0[r0], r0, H0