% EXPECT: unsat
OPTION "logic" "ALL_SUPPORTED";
IntPair: TYPE = [INT, INT];
x : SET OF IntPair;
y : SET OF IntPair;
ASSERT y = (TCLOSURE(x) JOIN x);
ASSERT (1,2) IS_IN ((x JOIN x) JOIN x);
ASSERT NOT (y <= TCLOSURE(x));

CHECKSAT;