| ordered≤(a ' + x) ⊦ ins≤(a, x) = a ' + x |
Used simplifier rules: ins-e: ⊦ ins≤(a, []) = a ';%le-r: ⊦ ordered≤(a ' + b ' + x) ↔ ¬ b < a ∧ ordered≤(b + x);%ins-y: ⊦ ¬ b < a → ins≤(a, b ' + x) = a + b + x;%list freely generated by [], +;;%c: ⊦ a + x = a ' + x; from specification list%a: ⊦ (x + y) + z = x + y + z; from specification list%app-08: ⊦ a ' + x = a ' + y ↔ x = y; from specification list%app: ⊦ x + [] = x; from specification list%c-04: ⊦ a ' = b ' ↔ a = b; from specification list