more work towards steady state for CTMCs

Former-commit-id: c3e17d1fc0

src/modelchecker/csl/SparseCtmcCslModelChecker.cpp

@@ -459,6 +459,7 @@ namespace storm {
         std::unique_ptr<CheckResult> SparseCtmcCslModelChecker<ValueType>::computeLongRunAverage(storm::logic::StateFormula const& stateFormula, bool qualitative, boost::optional<storm::logic::OptimalityType> const& optimalityType) {
             std::unique_ptr<CheckResult> subResultPointer = this->check(stateFormula);
             ExplicitQualitativeCheckResult const& subResult = subResultPointer->asExplicitQualitativeCheckResult();
+            std::cout << this->getModel().getTransitionMatrix() << std::endl;
             storm::storage::SparseMatrix<ValueType> probabilityMatrix = computeProbabilityMatrix(this->getModel().getTransitionMatrix(), this->getModel().getExitRateVector());
                         
             return std::unique_ptr<CheckResult>(new ExplicitQuantitativeCheckResult<ValueType>(SparseDtmcPrctlModelChecker<ValueType>::computeLongRunAverageHelper(this->getModel(), probabilityMatrix, subResult.getTruthValuesVector(), qualitative, *linearEquationSolverFactory)));

src/modelchecker/prctl/SparseDtmcPrctlModelChecker.cpp

@@ -357,13 +357,29 @@ namespace storm {
             // introduced when subtracting the identity matrix.
 			bsccEquationSystem = bsccEquationSystem.transpose();
 
+            std::cout << bsccEquationSystem << std::endl;
+
+            // Add a row to the matrix that expresses that the sum over all entries needs to be one.
+            storm::storage::SparseMatrixBuilder<ValueType> builder(std::move(bsccEquationSystem));
+            typename storm::storage::SparseMatrixBuilder<ValueType>::index_type row = builder.getLastRow();
+            for (uint_fast64_t i = 0; i <= row; ++i) {
+                builder.addNextValue(row + 1, i, 1);
+            }
+            bsccEquationSystem = builder.build();
+            std::cout << bsccEquationSystem << std::endl;
+            
 			std::vector<ValueType> bsccEquationSystemRightSide(bsccEquationSystem.getColumnCount(), zero);
+            bsccEquationSystemRightSide.back() = one;
 			std::vector<ValueType> bsccEquationSystemSolution(bsccEquationSystem.getColumnCount(), one);
 			{
                 std::unique_ptr<storm::solver::LinearEquationSolver<ValueType>> solver = linearEquationSolverFactory.create(bsccEquationSystem);
 				solver->solveEquationSystem(bsccEquationSystemSolution, bsccEquationSystemRightSide);
 			}
             
+            for (auto const& elem : bsccEquationSystemSolution) {
+                std::cout << "sol " << elem << std::endl;
+            }
+
 			// Calculate LRA Value for each BSCC from steady state distribution in BSCCs.
 			// We have to scale the results, as the probabilities for each BSCC have to sum up to one, which they don't
             // necessarily do in the solution of the equation system.

src/storage/SparseMatrix.cpp

@@ -82,6 +82,20 @@ namespace storm {
             rowIndications.push_back(0);
         }
         
+        template<typename ValueType>
+        SparseMatrixBuilder<ValueType>::SparseMatrixBuilder(SparseMatrix<ValueType>&& matrix) :  initialRowCountSet(false), initialRowCount(0), initialColumnCountSet(false), initialColumnCount(0), initialEntryCountSet(false), initialEntryCount(0), forceInitialDimensions(false), hasCustomRowGrouping(matrix.nontrivialRowGrouping), initialRowGroupCountSet(false), initialRowGroupCount(0), rowGroupIndices(), columnsAndValues(std::move(matrix.columnsAndValues)), rowIndications(std::move(matrix.rowIndications)), currentEntryCount(matrix.entryCount), lastRow(matrix.rowCount - 1), lastColumn(columnsAndValues.back().getColumn()), highestColumn(matrix.getColumnCount()), currentRowGroup() {
+            
+            // If the matrix has a custom row grouping, we move it and remove the last element to make it 'open' again.
+            if (hasCustomRowGrouping) {
+                rowGroupIndices = std::move(matrix.rowGroupIndices);
+                rowGroupIndices.pop_back();
+                currentRowGroup = rowGroupIndices.size() - 1;
+            }
+            
+            // Likewise, we need to 'open' the row indications again.
+            rowIndications.pop_back();
+        }
+        
         template<typename ValueType>
         void SparseMatrixBuilder<ValueType>::addNextValue(index_type row, index_type column, ValueType const& value) {
             // Check that we did not move backwards wrt. the row.
@@ -176,7 +190,17 @@ namespace storm {
                 }
             }
 
-            return SparseMatrix<ValueType>(columnCount, std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices));
+            return SparseMatrix<ValueType>(columnCount, std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices), hasCustomRowGrouping);
+        }
+        
+        template<typename ValueType>
+        typename SparseMatrixBuilder<ValueType>::index_type SparseMatrixBuilder<ValueType>::getLastRow() const {
+            return lastRow;
+        }
+        
+        template<typename ValueType>
+        typename SparseMatrixBuilder<ValueType>::index_type SparseMatrixBuilder<ValueType>::getLastColumn() const {
+            return lastColumn;
         }
         
         template<typename ValueType>
@@ -220,17 +244,17 @@ namespace storm {
         }
         
         template<typename ValueType>
-        SparseMatrix<ValueType>::SparseMatrix() : rowCount(0), columnCount(0), entryCount(0), nonzeroEntryCount(0), columnsAndValues(), rowIndications(), rowGroupIndices() {
+        SparseMatrix<ValueType>::SparseMatrix() : rowCount(0), columnCount(0), entryCount(0), nonzeroEntryCount(0), columnsAndValues(), rowIndications(), nontrivialRowGrouping(false), rowGroupIndices() {
             // Intentionally left empty.
         }
         
         template<typename ValueType>
-        SparseMatrix<ValueType>::SparseMatrix(SparseMatrix<ValueType> const& other) : rowCount(other.rowCount), columnCount(other.columnCount), entryCount(other.entryCount), nonzeroEntryCount(other.nonzeroEntryCount), columnsAndValues(other.columnsAndValues), rowIndications(other.rowIndications), rowGroupIndices(other.rowGroupIndices) {
+        SparseMatrix<ValueType>::SparseMatrix(SparseMatrix<ValueType> const& other) : rowCount(other.rowCount), columnCount(other.columnCount), entryCount(other.entryCount), nonzeroEntryCount(other.nonzeroEntryCount), columnsAndValues(other.columnsAndValues), rowIndications(other.rowIndications), nontrivialRowGrouping(other.nontrivialRowGrouping), rowGroupIndices(other.rowGroupIndices) {
             // Intentionally left empty.
         }
         
         template<typename ValueType>
-        SparseMatrix<ValueType>::SparseMatrix(SparseMatrix<ValueType>&& other) : rowCount(other.rowCount), columnCount(other.columnCount), entryCount(other.entryCount), nonzeroEntryCount(other.nonzeroEntryCount), columnsAndValues(std::move(other.columnsAndValues)), rowIndications(std::move(other.rowIndications)), rowGroupIndices(std::move(other.rowGroupIndices)) {
+        SparseMatrix<ValueType>::SparseMatrix(SparseMatrix<ValueType>&& other) : rowCount(other.rowCount), columnCount(other.columnCount), entryCount(other.entryCount), nonzeroEntryCount(other.nonzeroEntryCount), columnsAndValues(std::move(other.columnsAndValues)), rowIndications(std::move(other.rowIndications)), nontrivialRowGrouping(other.nontrivialRowGrouping), rowGroupIndices(std::move(other.rowGroupIndices)) {
             // Now update the source matrix
             other.rowCount = 0;
             other.columnCount = 0;
@@ -238,12 +262,12 @@ namespace storm {
         }
         
         template<typename ValueType>
-        SparseMatrix<ValueType>::SparseMatrix(index_type columnCount, std::vector<index_type> const& rowIndications, std::vector<MatrixEntry<index_type, ValueType>> const& columnsAndValues, std::vector<index_type> const& rowGroupIndices) : rowCount(rowIndications.size() - 1), columnCount(columnCount), entryCount(columnsAndValues.size()), nonzeroEntryCount(0), columnsAndValues(columnsAndValues), rowIndications(rowIndications), rowGroupIndices(rowGroupIndices) {
+        SparseMatrix<ValueType>::SparseMatrix(index_type columnCount, std::vector<index_type> const& rowIndications, std::vector<MatrixEntry<index_type, ValueType>> const& columnsAndValues, std::vector<index_type> const& rowGroupIndices, bool nontrivialRowGrouping) : rowCount(rowIndications.size() - 1), columnCount(columnCount), entryCount(columnsAndValues.size()), nonzeroEntryCount(0), columnsAndValues(columnsAndValues), rowIndications(rowIndications), nontrivialRowGrouping(nontrivialRowGrouping), rowGroupIndices(rowGroupIndices) {
 			this->updateNonzeroEntryCount();
         }
         
         template<typename ValueType>
-        SparseMatrix<ValueType>::SparseMatrix(index_type columnCount, std::vector<index_type>&& rowIndications, std::vector<MatrixEntry<index_type, ValueType>>&& columnsAndValues, std::vector<index_type>&& rowGroupIndices) : rowCount(rowIndications.size() - 1), columnCount(columnCount), entryCount(columnsAndValues.size()), nonzeroEntryCount(0), columnsAndValues(std::move(columnsAndValues)), rowIndications(std::move(rowIndications)), rowGroupIndices(std::move(rowGroupIndices)) {
+        SparseMatrix<ValueType>::SparseMatrix(index_type columnCount, std::vector<index_type>&& rowIndications, std::vector<MatrixEntry<index_type, ValueType>>&& columnsAndValues, std::vector<index_type>&& rowGroupIndices, bool nontrivialRowGrouping) : rowCount(rowIndications.size() - 1), columnCount(columnCount), entryCount(columnsAndValues.size()), nonzeroEntryCount(0), columnsAndValues(std::move(columnsAndValues)), rowIndications(std::move(rowIndications)), nontrivialRowGrouping(nontrivialRowGrouping), rowGroupIndices(std::move(rowGroupIndices)) {
 			this->updateNonzeroEntryCount();
         }
                 
@@ -259,6 +283,7 @@ namespace storm {
                 columnsAndValues = other.columnsAndValues;
                 rowIndications = other.rowIndications;
                 rowGroupIndices = other.rowGroupIndices;
+                nontrivialRowGrouping = other.nontrivialRowGrouping;
             }
             
             return *this;
@@ -276,6 +301,7 @@ namespace storm {
                 columnsAndValues = std::move(other.columnsAndValues);
                 rowIndications = std::move(other.rowIndications);
                 rowGroupIndices = std::move(other.rowGroupIndices);
+                nontrivialRowGrouping = other.nontrivialRowGrouping;
             }
             
             return *this;
@@ -506,7 +532,7 @@ namespace storm {
             }
             
             // Create and initialize resulting matrix.
-            SparseMatrixBuilder<ValueType> matrixBuilder(subRows, columnConstraint.getNumberOfSetBits(), subEntries, true, true);
+            SparseMatrixBuilder<ValueType> matrixBuilder(subRows, columnConstraint.getNumberOfSetBits(), subEntries, true, this->hasNontrivialRowGrouping());
             
             // Create a temporary vector that stores for each index whose bit is set to true the number of bits that
             // were set before that particular index.
@@ -534,7 +560,9 @@ namespace storm {
             // Copy over selected entries.
             index_type rowCount = 0;
             for (auto index : rowGroupConstraint) {
+                if (this->hasNontrivialRowGrouping()) {
                     matrixBuilder.newRowGroup(rowCount);
+                }
                 for (index_type i = rowGroupIndices[index]; i < rowGroupIndices[index + 1]; ++i) {
                     bool insertedDiagonalElement = false;
                     
@@ -659,7 +687,7 @@ namespace storm {
                 rowGroupIndices[i] = i;
             }
             
-            storm::storage::SparseMatrix<ValueType> transposedMatrix(columnCount, std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices));
+            storm::storage::SparseMatrix<ValueType> transposedMatrix(columnCount, std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices), false);
                         
             return transposedMatrix;
         }
@@ -906,6 +934,11 @@ namespace storm {
             return this->columnsAndValues.begin() + this->rowIndications[rowCount];
         }
         
+        template<typename ValueType>
+        bool SparseMatrix<ValueType>::hasNontrivialRowGrouping() const {
+            return nontrivialRowGrouping;
+        }
+        
         template<typename ValueType>
         ValueType SparseMatrix<ValueType>::getRowSum(index_type row) const {
             ValueType sum = storm::utility::zero<ValueType>();

src/storage/SparseMatrix.h

@@ -149,6 +149,14 @@ namespace storm {
              */
             SparseMatrixBuilder(index_type rows = 0, index_type columns = 0, index_type entries = 0, bool forceDimensions = true, bool hasCustomRowGrouping = false, index_type rowGroups = 0);
             
+            /*!
+             * Moves the contents of the given matrix into the matrix builder so that its contents can be modified again.
+             * This is, for example, useful if rows need to be added to the matrix.
+             *
+             * @param matrix The matrix that is to be made editable again.
+             */
+            SparseMatrixBuilder(SparseMatrix<ValueType>&& matrix);
+            
             /*!
              * Sets the matrix entry at the given row and column to the given value. After all entries have been added,
              * a call to finalize(false) is mandatory.
@@ -193,6 +201,20 @@ namespace storm {
              */
             SparseMatrix<value_type> build(index_type overriddenRowCount = 0, index_type overriddenColumnCount = 0, index_type overriddenRowGroupCount = 0);
             
+            /*!
+             * Retrieves the most recently used row.
+             * 
+             * @return The most recently used row.
+             */
+            index_type getLastRow() const;
+
+            /*!
+             * Retrieves the most recently used row.
+             *
+             * @return The most recently used row.
+             */
+            index_type getLastColumn() const;
+            
         private:
             // A flag indicating whether a row count was set upon construction.
             bool initialRowCountSet;
@@ -277,6 +299,7 @@ namespace storm {
             friend class storm::adapters::EigenAdapter;
             friend class storm::adapters::StormAdapter;
 			friend class storm::solver::TopologicalValueIterationMinMaxLinearEquationSolver<ValueType>;
+            friend class SparseMatrixBuilder<ValueType>;
             
             typedef uint_fast64_t index_type;
             typedef ValueType value_type;
@@ -402,8 +425,9 @@ namespace storm {
              * @param rowIndications The row indications vector of the matrix to be constructed.
              * @param columnsAndValues The vector containing the columns and values of the entries in the matrix.
              * @param rowGroupIndices The vector representing the row groups in the matrix.
+             * @param hasNontrivialRowGrouping If set to true, this indicates that the row grouping is non-trivial.
              */
-            SparseMatrix(index_type columnCount, std::vector<index_type> const& rowIndications, std::vector<MatrixEntry<index_type, value_type>> const& columnsAndValues, std::vector<index_type> const& rowGroupIndices);
+            SparseMatrix(index_type columnCount, std::vector<index_type> const& rowIndications, std::vector<MatrixEntry<index_type, value_type>> const& columnsAndValues, std::vector<index_type> const& rowGroupIndices, bool hasNontrivialRowGrouping);
             
             /*!
              * Constructs a sparse matrix by moving the given contents.
@@ -412,8 +436,9 @@ namespace storm {
              * @param rowIndications The row indications vector of the matrix to be constructed.
              * @param columnsAndValues The vector containing the columns and values of the entries in the matrix.
              * @param rowGroupIndices The vector representing the row groups in the matrix.
+             * @param hasNontrivialRowGrouping If set to true, this indicates that the row grouping is non-trivial.
              */
-            SparseMatrix(index_type columnCount, std::vector<index_type>&& rowIndications, std::vector<MatrixEntry<index_type, value_type>>&& columnsAndValues, std::vector<index_type>&& rowGroupIndices);
+            SparseMatrix(index_type columnCount, std::vector<index_type>&& rowIndications, std::vector<MatrixEntry<index_type, value_type>>&& columnsAndValues, std::vector<index_type>&& rowGroupIndices, bool hasNontrivialRowGrouping);
 
             /*!
              * Assigns the contents of the given matrix to the current one by deep-copying its contents.
@@ -799,6 +824,13 @@ namespace storm {
              */
             iterator end();
             
+            /*!
+             * Retrieves whether the matrix has a (possibly) non-trivial row grouping.
+             *
+             * @return True iff the matrix has a (possibly) non-trivial row grouping.
+             */
+            bool hasNontrivialRowGrouping() const;
+
 			/*!
 			* Returns a copy of the matrix with the chosen internal data type
 			*/
@@ -813,7 +845,7 @@ namespace storm {
 					new_columnsAndValues.at(i) = MatrixEntry<SparseMatrix::index_type, NewValueType>(columnsAndValues.at(i).getColumn(), static_cast<NewValueType>(columnsAndValues.at(i).getValue()));
 				}
 
-				return SparseMatrix<NewValueType>(columnCount, std::move(new_rowIndications), std::move(new_columnsAndValues), std::move(new_rowGroupIndices));
+				return SparseMatrix<NewValueType>(columnCount, std::move(new_rowIndications), std::move(new_columnsAndValues), std::move(new_rowGroupIndices), nontrivialRowGrouping);
 			}
             
         private:
@@ -852,6 +884,10 @@ namespace storm {
             // entry is not included anymore.
             std::vector<index_type> rowIndications;
             
+            // A flag that indicates whether the matrix has a non-trivial row-grouping, i.e. (possibly) more than one
+            // row per row group.
+            bool nontrivialRowGrouping;
+            
             // A vector indicating the row groups of the matrix.
             std::vector<index_type> rowGroupIndices;
         };

src/storage/dd/CuddAdd.cpp

@@ -557,7 +557,7 @@ namespace storm {
             rowIndications[0] = 0;
             
             // Construct matrix and return result.
-            return storm::storage::SparseMatrix<double>(columnOdd.getTotalOffset(), std::move(rowIndications), std::move(columnsAndValues), std::move(trivialRowGroupIndices));
+            return storm::storage::SparseMatrix<double>(columnOdd.getTotalOffset(), std::move(rowIndications), std::move(columnsAndValues), std::move(trivialRowGroupIndices), false);
         }
         
         storm::storage::SparseMatrix<double> Add<DdType::CUDD>::toMatrix(std::set<storm::expressions::Variable> const& groupMetaVariables, storm::dd::Odd<DdType::CUDD> const& rowOdd, storm::dd::Odd<DdType::CUDD> const& columnOdd) const {
@@ -680,7 +680,7 @@ namespace storm {
             }
             rowIndications[0] = 0;
             
-            return storm::storage::SparseMatrix<double>(columnOdd.getTotalOffset(), std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices));
+            return storm::storage::SparseMatrix<double>(columnOdd.getTotalOffset(), std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices), true);
         }
         
         std::pair<storm::storage::SparseMatrix<double>, std::vector<double>> Add<DdType::CUDD>::toMatrixVector(storm::dd::Add<storm::dd::DdType::CUDD> const& vector, std::vector<uint_fast64_t>&& rowGroupSizes, std::set<storm::expressions::Variable> const& groupMetaVariables, storm::dd::Odd<DdType::CUDD> const& rowOdd, storm::dd::Odd<DdType::CUDD> const& columnOdd) const {
@@ -804,7 +804,7 @@ namespace storm {
             }
             rowIndications[0] = 0;
             
-            return std::make_pair(storm::storage::SparseMatrix<double>(columnOdd.getTotalOffset(), std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices)), std::move(explicitVector));
+            return std::make_pair(storm::storage::SparseMatrix<double>(columnOdd.getTotalOffset(), std::move(rowIndications), std::move(columnsAndValues), std::move(rowGroupIndices), true), std::move(explicitVector));
         }
         
         template<typename ValueType>

test/functional/storage/SparseMatrixTest.cpp

@@ -154,8 +154,8 @@ TEST(SparseMatrix, CreationWithMovingContents) {
     columnsAndValues.emplace_back(1, 0.7);
     columnsAndValues.emplace_back(3, 0.2);
     
-    ASSERT_NO_THROW(storm::storage::SparseMatrix<double> matrix(4, {0, 2, 5, 5}, columnsAndValues, {0, 1, 2, 3}));
-    storm::storage::SparseMatrix<double> matrix(4, {0, 2, 5, 5}, columnsAndValues, {0, 1, 2, 3});
+    ASSERT_NO_THROW(storm::storage::SparseMatrix<double> matrix(4, {0, 2, 5, 5}, columnsAndValues, {0, 1, 2, 3}, false));
+    storm::storage::SparseMatrix<double> matrix(4, {0, 2, 5, 5}, columnsAndValues, {0, 1, 2, 3}, false);
     ASSERT_EQ(3, matrix.getRowCount());
     ASSERT_EQ(4, matrix.getColumnCount());
     ASSERT_EQ(5, matrix.getEntryCount());