contract C {
	function test_addmod(uint x, uint y) public pure {
		require(x % 13 == 0);
		require(y % 13 == 0);

		uint z = addmod(x, y, 13);
		assert(z == 0);
	}
	function test_mulmod(uint x, uint y) public pure {
		require(x % 13 == 0);
		require(y % 13 == 0);

		uint z = mulmod(x, y, 13);
		assert(z == 0);
	}
}
// ====
// SMTEngine: all
// ----
// Info 1391: CHC: 8 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.