minimal semipositive place invariants=

1	|	13.O2		:1
2	|	5.S18		:1,
	|	6.S17		:1
3	|	3.S13		:1,
	|	7.S12		:1,
	|	9.S15		:1
4	|	0.S7		:1,
	|	11.S6		:1,
	|	12.S22		:1
5	|	0.S7		:1,
	|	1.S5		:1,
	|	8.S4		:1,
	|	9.S15		:1,
	|	10.S16		:1,
	|	12.S22		:1