diff --git a/subprojects/xcfa/xcfa-analysis/src/main/java/hu/bme/mit/theta/xcfa/analysis/oc/XcfaOcChecker.kt b/subprojects/xcfa/xcfa-analysis/src/main/java/hu/bme/mit/theta/xcfa/analysis/oc/XcfaOcChecker.kt
index 7cbe0ca397..667514fd03 100644
--- a/subprojects/xcfa/xcfa-analysis/src/main/java/hu/bme/mit/theta/xcfa/analysis/oc/XcfaOcChecker.kt
+++ b/subprojects/xcfa/xcfa-analysis/src/main/java/hu/bme/mit/theta/xcfa/analysis/oc/XcfaOcChecker.kt
@@ -154,7 +154,7 @@ class XcfaOcChecker(
       }
       .also {
         logger.writeln(Logger.Level.MAINSTEP, "OC checker result: $it")
-        if (xcfa.unsafeUnrollUsed && !acceptUnreliableSafe) {
+        if (it.isSafe && xcfa.unsafeUnrollUsed && !acceptUnreliableSafe) {
           logger.writeln(
             Logger.Level.MAINSTEP,
             "Incomplete loop unroll used: safe result is unreliable.",