Adapt simple regression test in Coq

testcases/regression/certificate_AdditionSimple.v

@@ -5,8 +5,9 @@ Definition e3 :expr Q := Binop Plus C12 u0.
 Definition Rete3 := Ret e3.
 
 
-Definition defVars_additionSimple :(nat -> option mType) := fun n =>
-if n =? 0 then Some M64 else None.
+Definition defVars_additionSimple :(FloverMap.t mType) :=
+  FloverMap.add (Var Q 0) M64 (FloverMap.empty mType).
+
 Definition thePrecondition_additionSimple:precond := fun (n:nat) =>
 if n =? 0 then ( (-100)#(1), (100)#(1)) else (0#1,0#1).