(*******************************************************************************
 *                                IMITATOR MODEL                               
 * 
 * Title            : ALR15_fig1
 * Description      : Toy example for which reachability synthesis does not terminate. Expected result p \in (0, 1]
 * Correctness      : Reachability
 * Scalable         : no
 * Generated        : no
 * Categories       : Academic ; Toy ; Unsolvable
 * Source           : Own work
 * bibkey           : ALR15
 * Author           : Étienne André
 * Modeling         : Étienne André
 * Input by         : Étienne André
 * License          : Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
 * 
 * Created          : 2021/02/08
 * Last modified    : 2021/02/08
 * Model version    : 
 * 
 * IMITATOR version : 3
 ******************************************************************************)

var

(* Clocks *)
 	x, y,
		: clock;

(* Parameters *)
	p,
		: parameter;



(************************************************************)
  automaton pta
(************************************************************)
synclabs: ;

loc l1: invariant True
	when x = 1 do {x := 0} goto l2;
	when x >= 1 & y = 0 goto l4;

loc l2: invariant True
	when y = 1 do {y := 0} goto l3;

loc l3: invariant True
	when y <= p do {y := 0} goto l1;

loc l4: invariant True

end (* pta *)



(************************************************************)
(* Initial state *)
(************************************************************)

init :=
	(*------------------------------------------------------------*)
	(* Initial location *)
	(*------------------------------------------------------------*)
	& loc[pta] = l1

	(*------------------------------------------------------------*)
	(* Initial clock constraints *)
	(*------------------------------------------------------------*)
	& x = 0
	& y = 0

	(*------------------------------------------------------------*)
	(* Parameter constraints *)
	(*------------------------------------------------------------*)
	& 0 <= p & p <= 1
;


(************************************************************)
(* The end *)
(************************************************************)
end