diff --git a/src/storage/BitVector.h b/src/storage/BitVector.h
index 66baf546e..df3f86600 100644
--- a/src/storage/BitVector.h
+++ b/src/storage/BitVector.h
@@ -387,11 +387,11 @@ public:
 	 * Returns the number of bits that are set (to one) in this bit vector.
 	 * @return The number of bits that are set (to one) in this bit vector.
 	 */
-	uint_fast64_t getNumberOfSetBits() {
+	uint_fast64_t getNumberOfSetBits() const {
 		return getNumberOfSetBitsBeforeIndex(bucketCount << 6);
 	}
 
-	uint_fast64_t getNumberOfSetBitsBeforeIndex(uint_fast64_t index) {
+	uint_fast64_t getNumberOfSetBitsBeforeIndex(uint_fast64_t index) const {
 		uint_fast64_t result = 0;
 		// First, count all full buckets.
 		uint_fast64_t bucket = index >> 6;
@@ -437,7 +437,7 @@ public:
 	/*!
 	 * Retrieves the number of bits this bit vector can store.
 	 */
-	uint_fast64_t getSize() {
+	uint_fast64_t getSize() const {
 		return bitCount;
 	}
 
@@ -445,7 +445,7 @@ public:
 	 * Returns the size of the bit vector in memory measured in bytes.
 	 * @return The size of the bit vector in memory measured in bytes.
 	 */
-	uint_fast64_t getSizeInMemory() {
+	uint_fast64_t getSizeInMemory() const {
 		return sizeof(*this) + sizeof(uint_fast64_t) * bucketCount;
 	}
 
@@ -463,6 +463,20 @@ public:
 		return endIterator;
 	}
 
+	/*!
+	 * Returns a string representation of the bit vector.
+	 */
+	std::string toString() const {
+		std::stringstream result;
+		result << "bit vector(" << this->getNumberOfSetBits() << ") [";
+		for (auto index : *this) {
+			result << index << " ";
+		}
+		result << "]";
+
+		return result.str();
+	}
+
 private:
 
 	/*!
diff --git a/src/storm.cpp b/src/storm.cpp
index 250163f70..9d2fff6d7 100644
--- a/src/storm.cpp
+++ b/src/storm.cpp
@@ -216,12 +216,12 @@ void testChecking() {
 	if (parser.getType() == storm::models::DTMC) {
 		std::shared_ptr<storm::models::Dtmc<double>> dtmc = parser.getModel<storm::models::Dtmc<double>>();
 		dtmc->printModelInformationToStream(std::cout);
+
+		// testCheckingDie(*dtmc);
+		// testCheckingCrowds(*dtmc);
+		// testCheckingSynchronousLeader(*dtmc, 4);
 	}
 	else std::cout << "Input is not DTMC" << std::endl;
-
-	// testCheckingDie(*dtmc);
-	// testCheckingCrowds(*dtmc);
-	// testCheckingSynchronousLeader(*dtmc, 4);
 }
 
 /*!