#no update for variables
{
init
	node ini; true
	[ 
	send1||tran  transmit; true; y1=0; 1
	]
	[
	send2||tran  transmit; true; y2=0; 1
	 ] 
}
{
	node transmit; true
	[ 
	end1||tran  ini; true; y1=0; 1
	 ] 
	[ 
	end2||tran  ini; true; y2=0; 1
	 ] 
	[ 
	busy1||tran  transmit; y2>26; null; 1
	 ] 
	[ 
	busy2||tran  transmit; y1>26; null; 1
	 ] 
	[ 
	csend1||tran  collide; y2<=26; y1=0; 1
	 ] 
	[ 
	csend2||tran  collide; y1<=26; y2=0; 1
	 ] 
}
{
	node collide; y1<=26,y2<=26
	[ 
	cd1||tran  collide2; y1>=26; y1=0; 1
	 ] 
	[ 
	cd2||tran  collide1; y2>=26; y2=0; 1
	 ] 
}
{
	node collide1; y1<=26
	[ 
	cd1||tran  ini; y1>=26; y1=0,y2=0; 1
	 ] 
}
{
	node collide2; y2<=26
	[ 
	cd2||tran  ini; y2>=26; y1=0,y2=0; 1
	 ] 
*