issue6604-2.smt2 « strings « regress1 « 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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; COMMAND-LINE: --strings-exp --re-elim
; EXPECT: unsat
(set-logic ALL)
(declare-const a String)
(assert (str.in_re a (re.++ (str.to_re "A") re.allchar (str.to_re "A"))))
(assert (not (str.in_re a (re.++ (str.to_re "A") (re.* (re.++ (str.to_re "A") re.allchar)) re.allchar (str.to_re "A")))))
(check-sat)

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