// Bug fixed in trunk rev 3520 : GCD computation when max clock constraint is 0

pta

module M

	s : [0..3];
	x : clock;
	
	invariant
		  (s=0 => x=0)
		//& (s=3 => x>=1)
	endinvariant
	
	[] s=0 -> (s'=1);
	[] s=1 & x<=0 -> (s'=3);
	[] s=3 -> (s'=3);

endmodule

label "target" = s=3;

rewards "time"
	true : 1;
endrewards