ctmc

module M

	x : [0..3];
	
	[] x=0 -> 3 : (x'=1) + 3 : (x'=3);
	[] x=1 -> 1 : (x'=2);
	[] x=2 -> 0.5 : (x'=1);
	[] x=3 -> 2 : (x'=3);

endmodule

label "a" = x=1 | x=3;
label "b" = x=2 | x=3;