(set-logic QF_S) (declare-fun a () String) (assert (= (str.substr (str.++ a a "0") 0 6) (str.++ a "a"))) (check-sat) (get-model) Here's the behavior > z3 bug.smt2 ...
4G Network LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 6(900), 7(2600), 8(900), 9(1800), 10(1700/2100), 11(1500), 12(700), 13(700), 14(700), 17(700), 18 ...
4G Network 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29 ...