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Proof step 2 from proof ex2-shiftw-inst (previous step)

(((_∃ rrP -* P) * P0))(H) ⊦ (((rrP(r0, r1) -* P) * P0))(H)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ ((P0 * P1))(H) ↔ (∃ H0, H1. H0 ⊥ H1 ∧ H = H0 ∪ H1 ∧ P0(H0) ∧ P1(H1))
Proof step 4:
∃ H0, H1. H0 ⊥ H1 ∧ H = H0 ∪ H1 ∧ ((_∃ rrP -* P))(H0) ∧ P0(H1) ⊦ (((rrP(r0, r1) -* P) * P0))(H)

Rule argument

spec: heap-sep name: sep seq: ⊦ ((P0 * P1))(H) ↔ (∃ H0, H1. H0 ⊥ H1 ∧ H = H0 ∪ H1 ∧ P0(H0) ∧ P1(H1)) subst: [H, P1, P0] → [H, P0, _∃ rrP -* P] flags: <all paths>

Additional information

Used terms: H, P0, _∃ rrP -* P