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Proof step 8 from proof tr-unfold (previous step)

(((r => mknode(r0, a0, r1) * tr(r0, t2) * tr(r1, t3)) * P))(H) ⊦ r = null, ∃ t0, t1, a, r0, r1. branch(t2, a0, t3) = branch(t0, a, t1) ∧ ((r => mknode(r0, a, r1) * tr(r0, t0) * tr(r1, t1) * P))(H)

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

pos: right 2 terms: t2, t3, a0, r0, r1

Additional information

Used simplifier rules: sep-ass: ⊦ (P0 * P1) * P2 = P0 * P1 * P2; from specification heap-sep%sep-com: ⊦ P0 * P1 = P1 * P0; from specification heap-sep Used terms: t2, t3, a0, r0, r1