trace.icn: 3	| p1()
trace.icn: 9	| p1 suspended 1
trace.icn: 4	| p2()
trace.icn: 13	| p2 suspended 3
trace.icn: 5	| p3()
trace.icn: 17	| | p1()
trace.icn: 9	| | p1 suspended 1
trace.icn: 18	| | p2()
trace.icn: 13	| | p2 suspended 3
trace.icn: 19	| p3 failed
trace.icn: 6	main failed