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Proof step 9 from proof elim-fromto (previous step)

σ1 = ⌜nf⌝ , ⌜x⌝ = ⌜x0⌝ + σ1, # x0 ≤ # x ⊦ x0 = x to # x0 ∧ σ1 = ⌜x from # x0⌝

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: neq-fin-inf-01: ⊦ ⌜x⌝ ≠ σ + ⌜nf0⌝ ;%append-assoc: ⊦ (σ + σ1) + σ2 = σ + σ1 + σ2;