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Proof step 5 from proof dom-istore-crash-refm-refsize0 (previous step)

remove-refsize0(istore0) = istore0 ⊦ ∀ n. n ∈ dom remove-refsize0(crash(istore, istore0)) ↔ n ∈ dom istore0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
remove-refsize0(istore0) = istore0 ⊦ n ∈ remove-refsize0(crash(istore, istore0)) ↔ n ∈ istore0

Rule argument

Additional information

Used simplifier rules: ⊦ n ∈ dom istore ↔ n ∈ istore; (s)