Dataflows.FUNCTION_ENVEnvironment relative to the function being processed, and function to create them from Kf.
val to_ordered : Cil_types.stmt -> Ordered_stmt.ordered_stmtval to_stmt : Ordered_stmt.ordered_stmt -> Cil_types.stmtval connected_component : Ordered_stmt.ordered_stmt -> intval kf : Kernel_function.t