Remove default limit

src/bin/options.ml

@@ -240,13 +240,13 @@ let state =
     let doc = "Stop the program after a time lapse of $(docv).
                  Accepts usual suffixes for durations : s,m,h,d.
                  Without suffix, default to a time in seconds." in
-    Arg.(value & opt c_time 300. & info ["t"; "time"] ~docv:"TIME" ~doc ~docs)
+    Arg.(value & opt c_time infinity & info ["t"; "time"] ~docv:"TIME" ~doc ~docs)
   in
   let size =
     let doc = "Stop the program if it tries and use more the $(docv) memory space. " ^
               "Accepts usual suffixes for sizes : k,M,G,T. " ^
               "Without suffix, default to a size in octet." in
-    Arg.(value & opt c_size 1_000_000_000. & info ["s"; "size"] ~docv:"SIZE" ~doc ~docs)
+    Arg.(value & opt c_size infinity & info ["s"; "size"] ~docv:"SIZE" ~doc ~docs)
   in
   let in_lang =
     let doc = Format.asprintf