assertTrue(a41.state().startsWith("open.not_running.suspended"));
a41.resume();
Thread.sleep (1000);
assertTrue(a42.state().startsWith("open.not_running.suspended"));
assertTrue(a43.state().startsWith("open.not_running.not_started"));
assertTrue(a44.state().startsWith("open.not_running.not_started"));
// start A42
a42.resume();
Thread.sleep (1000);
assertTrue(a43.state().startsWith("open.not_running.not_started"));
assertTrue(a44.state().startsWith("open.not_running.suspended"));