Initial point: 1
Final point: 1
# the first flow
1/a -triggered off ['0/a'] in flow 1
2/a -triggered off ['1/a'] in flow 1
3/a -triggered off ['2/a'] in flow 1
4/a -triggered off ['3/a'] in flow 1
# the second flow
3/a -triggered off ['2/a'] in flow 2
4/a -triggered off ['3/a'] in flow 2
# the joined flow
5/a -triggered off ['4/a'] in flow 1,2
6/a -triggered off ['5/a'] in flow 1,2
7/a -triggered off ['6/a'] in flow 1,2
