we do not support PVS 5.0 anymore

(does not make much sense without polymorphism)

configure.in

@@ -469,21 +469,15 @@ else
         PVSVERSION=`$PVS -version | sed -n -e 's|.*Version* *\([[^ ]]*\)$|\1|p' `
 
         case $PVSVERSION in
-          6.0)
-	        enable_pvs_support=yes
+          2.*|3.*|4.*|5.*)
                 AC_MSG_RESULT($PVSVERSION)
+                enable_pvs_support=no
+	        AC_MSG_WARN(You need PVS 6.0 or higher; PVS discarded)
+                reason_pvs_support=" (need version 6.0 or higher)"
                 ;;
-          5.0)
+          *)
 	        enable_pvs_support=yes
                 AC_MSG_RESULT($PVSVERSION)
-                enable_pvs_libs=no
-                AC_MSG_WARN(No PVS realizations)
-                reason_pvs_libs="(requires version 6.0 or higher)"
-                ;;
-          *)
-                enable_pvs_support=no
-	        AC_MSG_WARN(You need PVS 5.0 or higher; PVS discarded)
-                reason_pvs_support=" (need version 5.0 or higher)"
                 ;;
         esac
     fi

share/provers-detection-data.conf.in

@@ -286,8 +286,7 @@ exec = "pvs"
 version_switch = "-version"
 version_regexp = "PVS Version \\([^ \n]+\\)"
 version_ok = "6.0"
-version_ok = "5.0"
-version_old = "^[0-4]\..+$"
+version_bad = "^[0-5]\..+$"
 command = "'@LOCALBIN@why3-cpulimit' 0 %m -s @LOCALBIN@why3-check-pvs %l %f"
 driver = "drivers/pvs.drv"
 in_place = true