@Test(expected=StackTooSmallException.class) // MSTORE OP
public void testMSTORE_5() {

    VM vm = new VM();
    program =  new Program(Hex.decode("61123454"), invoke);
    try {
        vm.step(program);
        vm.step(program);
    } finally {
        assertTrue(program.isStopped());
    }
}