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Merge branch 'master' of https://sselab.de/lab9/private/git/storm

main
gereon 13 years ago
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1f3b172c83 17e0e8165a
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bb6afcb1fd
2 changed files with 95 additions and 73 deletions
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  1. 139
      src/models/GraphTransitions.h
  2. 29
      src/utility/GraphAnalyzer.h

139
src/models/GraphTransitions.h
View File

@ -40,7 +40,7 @@ public:
* of the backwards transition relation.
*/
GraphTransitions(storm::storage::SparseMatrix<T> const& transitionMatrix, bool forward)
: successorList(nullptr), stateIndications(nullptr), numberOfStates(transitionMatrix.getColumnCount()), numberOfTransitions(transitionMatrix.getNonZeroEntryCount()) {
: numberOfStates(transitionMatrix.getColumnCount()), numberOfTransitions(transitionMatrix.getNonZeroEntryCount()), successorList(numberOfTransitions), stateIndications(numberOfStates + 1) {
if (forward) {
this->initializeForward(transitionMatrix);
} else {
@ -49,7 +49,7 @@ public:
}
GraphTransitions(storm::storage::SparseMatrix<T> const& transitionMatrix, std::vector<uint_fast64_t> const& nondeterministicChoiceIndices, bool forward)
: successorList(nullptr), stateIndications(nullptr), numberOfStates(transitionMatrix.getColumnCount()), numberOfTransitions(transitionMatrix.getNonZeroEntryCount()) {
: numberOfStates(transitionMatrix.getColumnCount()), numberOfTransitions(transitionMatrix.getNonZeroEntryCount()), successorList(numberOfTransitions), stateIndications(numberOfStates + 1) {
if (forward) {
this->initializeForward(transitionMatrix, nondeterministicChoiceIndices);
} else {
@ -57,17 +57,36 @@ public:
}
}
GraphTransitions(GraphTransitions<T> const& transitions, std::vector<std::vector<std::uint_fast64_t>> const& stronglyConnectedComponents, std::map<uint_fast64_t, uint_fast64_t> const& stateToSccMap)
: numberOfStates(stronglyConnectedComponents.size()), numberOfTransitions(0), successorList(), stateIndications(numberOfStates + 1) {
this->initializeFromSccDecomposition(transitions, stronglyConnectedComponents, stateToSccMap);
}
GraphTransitions() : numberOfStates(0), numberOfTransitions(0), successorList(), stateIndications() {
// Intentionally left empty.
}
GraphTransitions(GraphTransitions<T>&& other) {
this->numberOfStates = other.numberOfStates;
this->numberOfTransitions = other.numberOfTransitions;
std::swap(successorList, other.successorList);
std::swap(stateIndications, other.stateIndications);
}
GraphTransitions<T>& operator=(GraphTransitions<T>&& other) {
this->numberOfStates = other.numberOfStates;
this->numberOfTransitions = other.numberOfTransitions;
std::swap(successorList, other.successorList);
std::swap(stateIndications, other.stateIndications);
return *this;
}
//! Destructor
/*!
* Destructor. Frees the internal storage.
*/
~GraphTransitions() {
if (this->successorList != nullptr) {
delete[] this->successorList;
}
if (this->stateIndications != nullptr) {
delete[] this->stateIndications;
}
// Intentionally left empty.
}
/*!
@ -86,7 +105,7 @@ public:
* @return An iterator to the predecessors of the given states.
*/
stateSuccessorIterator beginStateSuccessorsIterator(uint_fast64_t state) const {
return this->successorList + this->stateIndications[state];
return &this->successorList[this->stateIndications[state]];
}
/*!
@ -97,7 +116,12 @@ public:
* the given state.
*/
stateSuccessorIterator endStateSuccessorsIterator(uint_fast64_t state) const {
return this->successorList + this->stateIndications[state + 1];
std::cout << "size: " << this->stateIndications.size() << std::endl;
std::cout << "idx accessed " << state << std::endl;
std::cout << this->stateIndications[state + 1] << std::endl;
std::cout << "other size: " << this->successorList.size() << std::endl;
std::cout << this->successorList[this->stateIndications[state + 1]] << std::endl;
return &this->successorList[this->stateIndications[state + 1]];
}
/*!
@ -106,36 +130,56 @@ public:
*/
std::string toString() const {
std::stringstream stream;
stream << successorList << std::endl;
stream << stateIndications << std::endl;
return stream.str();
}
stream << "successorList (" << numberOfTransitions << ")" << std::endl;
for (uint_fast64_t i = 0; i < numberOfTransitions; ++i) {
stream << successorList[i] << " ";
}
private:
void initializeFromSccDecomposition(GraphTransitions<T> const& transitions, std::vector<std::vector<uint_fast64_t>> const& stronglyConnectedComponents, std::map<uint_fast64_t, uint_fast64_t> const& stateToSccMap) {
for (uint_fast64_t currentSccIndex = 0; currentSccIndex < stronglyConnectedComponents.size(); ++currentSccIndex) {
// Mark beginning of current SCC.
stateIndications[currentSccIndex] = successorList.size();
// Get the actual SCC.
std::vector<uint_fast64_t> const& scc = stronglyConnectedComponents[currentSccIndex];
// Now, we determine the SCCs which are reachable (in one step) from the current SCC.
std::set<uint_fast64_t> allTargetSccs;
for (auto state : scc) {
for (stateSuccessorIterator succIt = beginStateSuccessorsIterator(state), succIte = endStateSuccessorsIterator(state); succIt != succIte; ++succIt) {
uint_fast64_t targetScc = stateToSccMap.find(*succIt)->second;
// We only need to consider transitions that are actually leaving the SCC.
if (targetScc != currentSccIndex) {
allTargetSccs.insert(targetScc);
}
}
}
stream << std::endl << std::endl << " stateIndications (" << numberOfStates + 1 << ")" << std::endl;
for (uint_fast64_t i = 0; i <= numberOfStates; ++i) {
stream << stateIndications[i] << " ";
// Now we can just enumerate all the target SCCs and insert the corresponding transitions.
for (auto targetScc : allTargetSccs) {
successorList.push_back(targetScc);
}
}
return stream.str();
}
// Put the sentinel element at the end and initialize the number of transitions.
stateIndications[numberOfStates] = successorList.size();
numberOfTransitions = successorList.size();
private:
std::cout << this->toString() << std::endl;
}
/*!
* Initializes this graph transitions object using the forward transition
* relation given by means of a sparse matrix.
*/
void initializeForward(storm::storage::SparseMatrix<T> const& transitionMatrix) {
this->successorList = new uint_fast64_t[numberOfTransitions];
this->stateIndications = new uint_fast64_t[numberOfStates + 1];
// First, we copy the index list from the sparse matrix as this will
// stay the same.
std::copy(transitionMatrix.getRowIndications().begin(), transitionMatrix.getRowIndications().end(), this->stateIndications);
std::copy(transitionMatrix.getRowIndications().begin(), transitionMatrix.getRowIndications().end(), this->stateIndications.begin());
// Now we can iterate over all rows of the transition matrix and record
// the target state.
// Now we can iterate over all rows of the transition matrix and record the target state.
for (uint_fast64_t i = 0, currentNonZeroElement = 0; i < numberOfStates; i++) {
for (auto rowIt = transitionMatrix.beginConstColumnIterator(i); rowIt != transitionMatrix.endConstColumnIterator(i); ++rowIt) {
this->successorList[currentNonZeroElement++] = *rowIt;
@ -144,9 +188,6 @@ private:
}
void initializeForward(storm::storage::SparseMatrix<T> const& transitionMatrix, std::vector<uint_fast64_t> const& nondeterministicChoiceIndices) {
this->successorList = new uint_fast64_t[numberOfTransitions];
this->stateIndications = new uint_fast64_t[numberOfStates + 1];
for (uint_fast64_t i = 0; i < numberOfStates; ++i) {
this->stateIndications[i] = transitionMatrix.getRowIndications().at(nondeterministicChoiceIndices[i]);
}
@ -169,9 +210,6 @@ private:
* matrix.
*/
void initializeBackward(storm::storage::SparseMatrix<T> const& transitionMatrix) {
this->successorList = new uint_fast64_t[numberOfTransitions];
this->stateIndications = new uint_fast64_t[numberOfStates + 1]();
// First, we need to count how many backward transitions each state has.
for (uint_fast64_t i = 0; i < numberOfStates; ++i) {
for (auto rowIt = transitionMatrix.beginConstColumnIterator(i); rowIt != transitionMatrix.endConstColumnIterator(i); ++rowIt) {
@ -191,25 +229,18 @@ private:
// Create an array that stores the next index for each state. Initially
// this corresponds to the previously computed accumulated offsets.
uint_fast64_t* nextIndicesList = new uint_fast64_t[numberOfStates];
std::copy(stateIndications, stateIndications + numberOfStates, nextIndicesList);
std::vector<uint_fast64_t> nextIndices = stateIndications;
// Now we are ready to actually fill in the list of predecessors for
// every state. Again, we start by considering all but the last row.
for (uint_fast64_t i = 0; i < numberOfStates; ++i) {
for (auto rowIt = transitionMatrix.beginConstColumnIterator(i); rowIt != transitionMatrix.endConstColumnIterator(i); ++rowIt) {
this->successorList[nextIndicesList[*rowIt]++] = i;
this->successorList[nextIndices[*rowIt]++] = i;
}
}
// Now we can dispose of the auxiliary array.
delete[] nextIndicesList;
}
void initializeBackward(storm::storage::SparseMatrix<T> const& transitionMatrix, std::vector<uint_fast64_t> const& nondeterministicChoiceIndices) {
this->successorList = new uint_fast64_t[numberOfTransitions];
this->stateIndications = new uint_fast64_t[numberOfStates + 1]();
// First, we need to count how many backward transitions each state has.
for (uint_fast64_t i = 0; i < numberOfStates; ++i) {
for (uint_fast64_t j = nondeterministicChoiceIndices[i]; j < nondeterministicChoiceIndices[i + 1]; ++j) {
@ -231,32 +262,19 @@ private:
// Create an array that stores the next index for each state. Initially
// this corresponds to the previously computed accumulated offsets.
uint_fast64_t* nextIndicesList = new uint_fast64_t[numberOfStates];
std::copy(stateIndications, stateIndications + numberOfStates, nextIndicesList);
std::vector<uint_fast64_t> nextIndices = stateIndications;
// Now we are ready to actually fill in the list of predecessors for
// every state. Again, we start by considering all but the last row.
for (uint_fast64_t i = 0; i < numberOfStates; i++) {
for (uint_fast64_t j = nondeterministicChoiceIndices[i]; j < nondeterministicChoiceIndices[i + 1]; ++j) {
for (auto rowIt = transitionMatrix.beginConstColumnIterator(j); rowIt != transitionMatrix.endConstColumnIterator(j); ++rowIt) {
this->successorList[nextIndicesList[*rowIt]++] = i;
this->successorList[nextIndices[*rowIt]++] = i;
}
}
}
// Now we can dispose of the auxiliary array.
delete[] nextIndicesList;
}
/*! A list of successors for *all* states. */
uint_fast64_t* successorList;
/*!
* A list of indices indicating at which position in the global array the
* successors of a state can be found.
*/
uint_fast64_t* stateIndications;
/*!
* Store the number of states to determine the highest index at which the
* state_indices_list may be accessed.
@ -268,6 +286,15 @@ private:
* index at which the predecessor_list may be accessed.
*/
uint_fast64_t numberOfTransitions;
/*! A list of successors for *all* states. */
std::vector<uint_fast64_t> successorList;
/*!
* A list of indices indicating at which position in the global array the
* successors of a state can be found.
*/
std::vector<uint_fast64_t> stateIndications;
};
} // namespace models

29
src/utility/GraphAnalyzer.h
View File

@ -417,25 +417,21 @@ public:
}
template <typename T>
static uint_fast64_t performSccDecomposition(storm::storage::SparseMatrix<T> const& matrix, std::vector<uint_fast64_t> const& nondeterministicChoiceIndices, std::vector<std::vector<uint_fast64_t>*>* stronglyConnectedComponents) {
static void performSccDecomposition(storm::storage::SparseMatrix<T> const& matrix, std::vector<uint_fast64_t> const& nondeterministicChoiceIndices, std::vector<std::vector<uint_fast64_t>>& stronglyConnectedComponents, storm::models::GraphTransitions<T>& stronglyConnectedComponentsDependencyGraph) {
LOG4CPLUS_INFO(logger, "Computing SCC decomposition.");
// Get the forward transition relation from the model to ease the search.
storm::models::GraphTransitions<T> forwardTransitions(matrix, nondeterministicChoiceIndices, true);
std::cout << matrix.toString(&nondeterministicChoiceIndices) << std::endl;
std::cout << forwardTransitions.toString() << std::endl;
// Perform the actual SCC decomposition based on the graph-transitions of the system.
uint_fast64_t result = performSccDecomposition(nondeterministicChoiceIndices.size(), forwardTransitions, stronglyConnectedComponents);
performSccDecomposition(nondeterministicChoiceIndices.size(), forwardTransitions, stronglyConnectedComponents, stronglyConnectedComponentsDependencyGraph);
LOG4CPLUS_INFO(logger, "Done computing SCC decomposition.");
return result;
}
private:
template <typename T>
static uint_fast64_t performSccDecomposition(uint_fast64_t numberOfStates, storm::models::GraphTransitions<T> const& forwardTransitions, std::vector<std::vector<uint_fast64_t>*>* stronglyConnectedComponents) {
static void performSccDecomposition(uint_fast64_t numberOfStates, storm::models::GraphTransitions<T> const& forwardTransitions, std::vector<std::vector<uint_fast64_t>>& stronglyConnectedComponents, storm::models::GraphTransitions<T>& stronglyConnectedComponentsDependencyGraph) {
std::vector<uint_fast64_t> tarjanStack;
tarjanStack.reserve(numberOfStates);
storm::storage::BitVector tarjanStackStates(numberOfStates);
@ -444,18 +440,20 @@ private:
std::vector<uint_fast64_t> lowlinks(numberOfStates);
storm::storage::BitVector visitedStates(numberOfStates);
std::map<uint_fast64_t, uint_fast64_t> stateToSccMap;
uint_fast64_t currentIndex = 0;
for (uint_fast64_t state = 0; state < numberOfStates; ++state) {
if (!visitedStates.get(state)) {
performSccDecompositionHelper(state, currentIndex, stateIndices, lowlinks, tarjanStack, tarjanStackStates, visitedStates, forwardTransitions, stronglyConnectedComponents);
performSccDecompositionHelper(state, currentIndex, stateIndices, lowlinks, tarjanStack, tarjanStackStates, visitedStates, forwardTransitions, stronglyConnectedComponents, stateToSccMap);
}
}
return stronglyConnectedComponents->size();
stronglyConnectedComponentsDependencyGraph = storm::models::GraphTransitions<T>(forwardTransitions, stronglyConnectedComponents, stateToSccMap);
}
template <typename T>
static void performSccDecompositionHelper(uint_fast64_t startState, uint_fast64_t& currentIndex, std::vector<uint_fast64_t>& stateIndices, std::vector<uint_fast64_t>& lowlinks, std::vector<uint_fast64_t>& tarjanStack, storm::storage::BitVector& tarjanStackStates, storm::storage::BitVector& visitedStates, storm::models::GraphTransitions<T> const& forwardTransitions, std::vector<std::vector<uint_fast64_t>*>* stronglyConnectedComponents) {
static void performSccDecompositionHelper(uint_fast64_t startState, uint_fast64_t& currentIndex, std::vector<uint_fast64_t>& stateIndices, std::vector<uint_fast64_t>& lowlinks, std::vector<uint_fast64_t>& tarjanStack, storm::storage::BitVector& tarjanStackStates, storm::storage::BitVector& visitedStates, storm::models::GraphTransitions<T> const& forwardTransitions, std::vector<std::vector<uint_fast64_t>>& stronglyConnectedComponents, std::map<uint_fast64_t, uint_fast64_t>& stateToSccMap) {
// Create the stacks needed for turning the recursive formulation of Tarjan's algorithm
// into an iterative version. In particular, we keep one stack for states and one stack
// for the iterators. The last one is not strictly needed, but reduces iteration work when
@ -511,9 +509,7 @@ private:
// If the current state is the root of a SCC, we need to pop all states of the SCC from
// the algorithm's stack.
if (lowlinks[currentState] == stateIndices[currentState]) {
if (stronglyConnectedComponents != nullptr) {
stronglyConnectedComponents->push_back(new std::vector<uint_fast64_t>());
}
stronglyConnectedComponents.push_back(std::vector<uint_fast64_t>());
uint_fast64_t lastState = 0;
do {
@ -522,10 +518,9 @@ private:
tarjanStack.pop_back();
tarjanStackStates.set(lastState, false);
if (stronglyConnectedComponents != nullptr) {
// Add the state to the current SCC.
stronglyConnectedComponents->back()->push_back(lastState);
}
// Add the state to the current SCC.
stronglyConnectedComponents.back().push_back(lastState);
stateToSccMap[lastState] = stronglyConnectedComponents.size() - 1;
} while (lastState != currentState);
}

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