⌜x⌝ + σ0 = ⌜x0⌝ + ⌜x1⌝ , # x = # x0 ⊦ x = x0 ∧ σ0 = ⌜x1⌝
⌜x⌝ + σ0 = ⌜x0⌝ + ⌜nf⌝ , # x = # x0 ⊦ x = x0 ∧ σ0 = ⌜nf⌝
Used simplifier rules: stream freely generated by ⌜ ⌝, ⌜ ⌝;;