final double tolerance = 0.1;
EventState es = new EventState(closeEventsGenerator, 1.5 * gap, tolerance, 10);
AbstractStepInterpolator interpolator =
new DummyStepInterpolator(new double[0], new double[0], true);
interpolator.storeTime(r1 - 2.5 * gap);
interpolator.shift();
interpolator.storeTime(r1 - 1.5 * gap);
es.reinitializeBegin(interpolator);
interpolator.shift();