Enable restart if null command is found

Author: Markoutte

utbot-junit-contest/src/main/kotlin/org/utbot/runtool/UtBotTool2.kt

@@ -34,7 +34,7 @@ class UtBotTool2 : ITestingTool {
             val line = inputChannel.readLine()
             if (line == null) {
                 log("INIT FAILED, INPUT LINE IS <NULL>")
-                continue
+                break
             }
 
             logUtbotOut(line)
@@ -131,9 +131,9 @@ class UtBotTool2 : ITestingTool {
             while (true) {
                 val line = inputChannel.readLine()
                 if (line == null) {
-                    log(">>> INPUT FROM UTBOT IS NULL <<<")
-//                    restartProcess()
-                    continue
+                    log("INPUT FROM UTBOT IS NULL, RESTARTING UTBOT")
+                    restartProcess()
+                    break
                 }
                 logUtbotOut(line)