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on-restart-benchmarks/tests/spec/unit/globals/regular/globals_regular_regex_6.mzn
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MiniZinc

/***
!Test
expected: !Result
solution: !Solution
x: [A, B, A, C, A, D, A]
***/
include "regular_regexp.mzn";
int: n = 7;
enum Letter = {A, B, C, D};
array [1..n] of var Letter: x :: add_to_output;
constraint regular(x, "A ((B|C|D) A)*");
constraint forall (i in 1..n-2 where i mod 2 = 0) (x[i] < x[i+2]);