#version 100

composite main() {}

primitive example(in a, out[] b) {
	while (true) {
		sync {
			if (fires(a)) {
				int i = 0;
				while (i < b.length) {
					if (fires(b[i])) {
						int j = i + 1;
						while (j < b.length)
							assert !fires(b[j++]);
						break;
					}
					i++;
				}
				assert i < b.length;
			} else {
				int i = 0;
				while (i < b.length)
					assert !fires(b[i++]);
			}
		}
	}
}