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diff --git a/FreeRTOS/Test/CBMC/proofs/Queue/QueueGetMutexHolder/QueueGetMutexHolder_harness.c b/FreeRTOS/Test/CBMC/proofs/Queue/QueueGetMutexHolder/QueueGetMutexHolder_harness.c
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+++ b/FreeRTOS/Test/CBMC/proofs/Queue/QueueGetMutexHolder/QueueGetMutexHolder_harness.c
@@ -0,0 +1,41 @@
+/*
+ * FreeRTOS memory safety proofs with CBMC.
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * http://aws.amazon.com/freertos
+ * http://www.FreeRTOS.org
+ */
+
+#include "FreeRTOS.h"
+#include "queue_init.h"
+#include "queue.h"
+
+#include "cbmc.h"
+
+void harness() {
+  QueueHandle_t xSemaphore = xUnconstrainedQueue();
+  if (xSemaphore) {
+    xSemaphore->uxQueueType = nondet_uint8_t();
+    xQueueGetMutexHolder(xSemaphore);
+  }
+}