issue2958.smt2 « strings « regress0 « regress « test - cvc5.git - CVC4 is an efficient open-source automatic theorem prover for satisfiability modulo theories (SMT) problems.

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CVC4 is an efficient open-source automatic theorem prover for satisfiability modulo theories (SMT) problems.

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(set-info :smt-lib-version 2.5)
(set-logic QF_SLIA)
(set-info :status unsat)
(declare-const x String)
(assert (not (str.prefixof "ab" x)))
(assert (str.in.re (str.substr x 0 2) (re.++ (str.to.re "ab") (re.* (str.to.re "dcab")))))
(check-sat)

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