Level 1: .out_l[1] 
Level 2: .srt.state .srt.reg .in_f[1] .in_f[2] .out_l[2] .sim.state .sort_OK 
Level 3: .srt.tmp .in_f[3] .out_l[3] .sm.state 
Level 4: 
822fb98: IMPLIES	822fb88, 822fb78
822fb88: CONS	822fb38, 822fb48
822fb38: CONS	822e0f8, 0
822e0f8: DOT	0, 822e0e8
822e0e8: ATOM	lock, 0
822fb48: CONS	0, 0
822fb78: CONS	822fb58, 822fb68
822fb58: CONS	0, 0
822fb68: CONS	82227e0, 0
0 is not implemented

822fb18: IMPLIES	822fb08, 822faf8
822fb08: CONS	822fab8, 822fac8
822fab8: CONS	822e0a8, 0
822e0a8: DOT	0, 821e6f0
821e6f0: ATOM	sort_req, 0
822fac8: CONS	0, 0
822faf8: CONS	822fad8, 822fae8
822fad8: CONS	0, 0
822fae8: CONS	82227e0, 0
0 is not implemented

822fa98: IMPLIES	822fa88, 822fa78
822fa88: CONS	822fa38, 822fa48
822fa38: CONS	822e028, 0
822e028: DOT	0, 822e018
822e018: ATOM	pq_empty, 0
822fa48: CONS	0, 0
822fa78: CONS	822fa58, 822fa68
822fa58: CONS	0, 0
822fa68: CONS	82227e0, 0
0 is not implemented

822fa18: IMPLIES	822fa08, 822f9f8
822fa08: CONS	822f9b8, 822f9c8
822f9b8: CONS	822dfd8, 0
822dfd8: DOT	0, 822dfc8
822dfc8: ATOM	pq_full, 0
822f9c8: CONS	0, 0
822f9f8: CONS	822f9d8, 822f9e8
822f9d8: CONS	0, 0
822f9e8: CONS	82227e0, 0
0 is not implemented

822f998: IMPLIES	822f988, 822f978
822f988: CONS	822f938, 822f948
822f938: CONS	822dee8, 0
822dee8: DOT	822ddb8, 822ded8
822ddb8: DOT	0, 822dda8
822dda8: ATOM	srt, 0
822ded8: ATOM	tmp, 0
822f948: CONS	0, 0
822f978: CONS	822f958, 822f968
822f958: CONS	0, 0
822f968: CONS	82227e0, 0
0 is not implemented

822f918: IMPLIES	822f908, 822f8f8
822f908: CONS	822f8b8, 822f8c8
822f8b8: CONS	822dcf8, 0
822dcf8: DOT	822dc78, 822dbc8
822dc78: DOT	0, 822dc68
822dc68: ATOM	sm, 0
822dbc8: ATOM	state, 0
822f8c8: CONS	0, 0
822f8f8: CONS	822f8d8, 822f8e8
822f8d8: CONS	0, 0
822f8e8: CONS	82227e0, 0
0 is not implemented

822f898: IMPLIES	822f888, 822f878
822f888: CONS	822f838, 822f848
822f838: CONS	822da98, 0
822da98: ARRAY	822da08, 821dc40
822da08: DOT	0, 821ee20
821ee20: ATOM	out_l, 0
821dc40: NUMBER	3, 0
822f848: CONS	0, 0
822f878: CONS	822f858, 822f868
822f858: CONS	0, 0
822f868: CONS	82227e0, 0
0 is not implemented

822f818: IMPLIES	822f808, 822f7f8
822f808: CONS	822f7b8, 822f7c8
822f7b8: CONS	822d9c8, 0
822d9c8: ARRAY	822d938, 821dc40
822d938: DOT	0, 821e6c0
821e6c0: ATOM	in_f, 0
821dc40: NUMBER	3, 0
822f7c8: CONS	0, 0
822f7f8: CONS	822f7d8, 822f7e8
822f7d8: CONS	0, 0
822f7e8: CONS	82227e0, 0
0 is not implemented

The number of abstracted variables is 8
