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(set-info :smt-lib-version 2.6)
(set-logic SLIA)
(set-info :status unsat)
(set-option :strings-exp true)
(declare-fun var_0 () String)
(declare-fun var_1 () String)
(declare-fun var_2 () String)
(declare-fun var_3 () String)
(declare-fun var_4 () String)
(declare-fun var_5 () String)
(declare-fun var_6 () String)
(declare-fun var_7 () String)
(declare-fun var_8 () String)
(declare-fun var_9 () String)
(declare-fun var_10 () String)
(declare-fun var_11 () String)
(declare-fun var_12 () String)
(assert (str.in_re var_4 (re.++ (str.to_re "a") (re.* (str.to_re "b")))))
(assert (str.in_re var_4 (re.++ (re.* (str.to_re "a")) (str.to_re "b"))))
(assert (str.in_re var_4 (re.* (re.range "a" "u"))))
(assert (str.in_re var_4 (re.++ (re.* (str.to_re "a")) (re.++ (str.to_re "b") (re.* (str.to_re "b"))))))
(assert (not (str.in_re (str.++ "a" var_4 "b" ) (re.++ (re.* (str.to_re "a")) (re.++ (str.to_re "b") (re.* (str.to_re "b")))))))
(assert (and (<= 0 (str.len var_4)) (not (not (exists ((v Int)) (= (* v 2 ) (+ (str.len var_4) 2 )))))))
(check-sat)
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