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method testing1()
{
var a, b, c := {1,2}, {3, 4}, {5, 6};
assert a !! b !! c;
testing2(a, b, c);
assert !({1,2} !! {2,3});
assert !({1,2} !! {9} !! {2,3}); // tests the accumulation
assert !({1,2} !! {9} !! {2,3});
assert !({1,2} !! {9} !! {8} !! {2,3}); // doesn't break at 4. that seems like a good stopping place.
assert !({9} !! {1,2} !! {8} !! {2,3});
assert !({9} !! {1} + {2} !! {8} !! {2,3}); // mixing in some other operators
assert !({1} !! {1} + {2});
}
method testing2(a: set<int>, b: set<int>, c: set<int>)
requires a !! b !! c;
{
assert a !! b;
assert a !! c;
assert b !! c;
}
method testing3(a: set<int>, b: set<int>, c: set<int>, d: set<int>) // again with the four.
requires a !! b !! c !! d;
{
assert a !! b;
assert a !! c;
assert b !! c;
assert a !! d;
assert b !! d;
assert c !! d;
}
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