surete tp1

surete/tp1/temp_prop/nodes.lus

@@ -0,0 +1,30 @@
+
+node after (a: bool) returns (o: bool);
+var prev_o: bool;
+let
+  prev_o = false -> pre o;
+  o = prev_o or a;
+tel;
+
+node always_since (a: bool; b: bool) returns (o: bool);
+var prev_o: bool;
+let
+  prev_o = false -> pre o;
+  o = if b then a else prev_o and a;
+tel;
+
+node once_since(a: bool; reset: bool) returns (o: bool);
+var a_happened: bool;
+let
+  a_happened = a -> if reset then false else (pre a_happened or a);
+  o = (a and not reset) -> a_happened;
+tel;
+
+node always_from_to(b: bool; reset: bool; c: bool) returns (x: bool);
+var
+  c_happened: bool;
+  prev_b: bool;
+let
+  c_happened = c -> if reset then false else (c or pre c_happened);*
+  prev_b = b -> if reset then true else (b and prev_b);
+tel;