virtual bool addPost(Clasp::Solver& s)
{
if (conf_.dlprop==2)
if (!addDLProp(s,n_.constraints()))
return false;
std::vector<order::ReifiedLinearConstraint> constraints;
if (conf_.dlprop==1)
{
constraints = n_.constraints();
}
///solver takes ownership of propagator
clingcon::ClingconOrderPropagator* cp = new clingcon::ClingconOrderPropagator(s, n_.getVariableCreator(), conf_,
std::move(n_.constraints()),n_.getEqualities(),
&(to_.names_));
to_.props_[s.id()]=cp;
if (!s.addPost(cp))
return false;
if (conf_.dlprop==1)
if (!addDLProp(s, constraints))
return false;
return true;
}
bool onModel(const Clasp::Solver& s, const Clasp::Model& m) {
printModel(s.symbolTable(), m);
// exclude this model
Clasp::LitVec clause;
for (uint32 i = 1; i <= s.decisionLevel(); ++i) {
clause.push_back( ~s.decision(i) );
}
return m.ctx->commitClause(clause);
}
bool ExternalKnowledge::PostPropagator::propagate(Clasp::Solver &s) {
if(ext_->poll()) {
std::cerr << "Stopping solver..." << std::endl;
s.setStopConflict();
}
if(s.hasConflict()) {
assert(s.hasConflict());
return false;
}
return true;
}
void AspOutPrinter::reportModel(const Clasp::Solver& s, const Clasp::Enumerator& e) {
std::cout << "Model " << e.enumerated << ": \n";
// get the symbol table from the solver
const Clasp::SymbolTable& symTab = s.sharedContext()->symTab();
for (Clasp::SymbolTable::const_iterator it = symTab.begin(); it != symTab.end(); ++it) {
// print each named atom that is true w.r.t the current assignment
if (s.isTrue(it->second.lit) && !it->second.name.empty()) {
std::cout << it->second.name.c_str() << " ";
}
}
std::cout << std::endl;
}
bool ClingoPropagator::propagateFixpoint(Clasp::Solver& s, Clasp::PostPropagator*) {
POTASSCO_REQUIRE(prop_ <= trail_.size(), "Invalid propagate");
for (Control ctrl(*this, s, state_prop); prop_ != trail_.size() || front_ < (int32)s.numAssignedVars();) {
if (prop_ != trail_.size()) {
// create copy because trail might change during call to user propagation
temp_.assign(trail_.begin() + prop_, trail_.end());
prop_ = static_cast<uint32>(trail_.size());
ScopedLock(call_->lock(), call_->propagator(), Inc(epoch_))->propagate(ctrl, Potassco::toSpan(temp_));
}
else {
registerUndo(s);
front_ = (int32)s.numAssignedVars();
ScopedLock(call_->lock(), call_->propagator(), Inc(epoch_))->check(ctrl);
}
if (!addClause(s, state_prop) || (s.queueSize() && !s.propagateUntil(this))) {
return false;
}
}
return true;
}
bool addDLProp(Clasp::Solver& s, const std::vector<order::ReifiedLinearConstraint>& constraints)
{
clingcon::ClingconDLPropagator* dlp = new clingcon::ClingconDLPropagator(s, conf_);
for (const auto&i : constraints)
{
if (dlp->isValidConstraint(i))
dlp->addValidConstraint(i);
}
if (!s.addPost(dlp))
return false;
return true;
}
bool ClingconDLPropagator::init(Clasp::Solver& s)
{
for (unsigned int i = 0; i != literals_.size(); ++i)
{
if (!s.isFalse(literals_[i]) || !s.isTrue(literals_[i]))
{
s.addWatch(literals_[i],this,Clasp::Literal(i+1,false).rep());
s.addWatch(~literals_[i],this,Clasp::Literal(i+1,true).rep());
}
}
for (unsigned int i = 0; i != literals_.size(); ++i)
{
std::vector<difflogic::DLPropagator::EdgeId> consequences;
if (s.isFalse(literals_[i]))
consequences = p_.deactivate(i+1);
else
if (s.isTrue(literals_[i]))
consequences = p_.activate(i+1);
for (const auto& j : consequences)
{
Clasp::Literal l = edgeid2lit(j);
if (!s_.isTrue(l))
{
if (!s.force(l))
return false;
//std::cout << "initially propagated " << l.var() << "," << l.sign() << " to pending: " << j << std::endl;
propagated_.push_back(l);
}
}
}
return true;
}
bool ClaspCallback::onModel(const Clasp::Solver& s, const Clasp::Model& m)
{
if(app.getPrinter().listensForSolverEvents()) {
Clasp::SymbolTable& symbolTable = s.sharedContext()->symbolTable();
std::ostringstream msg;
msg << "Model: ";
for(Clasp::SymbolTable::const_iterator it = symbolTable.begin(); it != symbolTable.end(); ++it) {
if(m.isTrue(it->second.lit) && !it->second.name.empty())
msg << it->second.name.c_str() << ' ';
}
app.getPrinter().solverEvent(msg.str());
}
return true;
}
void ExternalKnowledge::removePostPropagator(Clasp::Solver& solver) {
solver.removePost(post_);
my_post_ = true;
}
void ExternalKnowledge::addPostPropagator(Clasp::Solver& solver) {
my_post_ = false;
solver.addPost(post_);
}
bool onModel(const Clasp::Solver& s, const Clasp::Model& m) {
printModel(s.symbolTable(), m);
return true;
}
bool TheoryPropagator::attach(Clasp::Solver& s) {
return s.addPost(new PP(*this));
}
bool TheoryPropagator::PP::propagateFixpoint(Clasp::Solver& s, Clasp::PostPropagator*) {
typedef Potassco::AbstractPropagator::ChangeList ChangeList;
while (delta_ != trail_.size()) {
uint32 dl = s.decisionLevel();
if (undo_.back().level != dl) {
s.addUndoWatch(dl, this);
undo_.push_back(Undo(dl, delta_));
}
ChangeList change = Potassco::toSpan(&trail_[0] + delta_, trail_.size() - delta_);
delta_ = trail_.size();
status_ = ClauseCreator::status_open;
solver_ = &s;
inProp_ = true;
bool ok = wrapper_->prop_->propagate(*this, change);
inProp_ = false;
if (!ok && !s.hasConflict() && (status_ & ClauseCreator::status_asserting) != 0) {
if (s.level(clause_[1].var()) < dl && dl != s.backtrackLevel()) {
TheoryPropagator::PP::reset();
for (PostPropagator* n = this->next; n; n = n->next) { n->reset(); }
dl = s.undoUntil(s.level(clause_[1].var()));
}
if (!s.isFalse(clause_[0])) {
ok = ClauseCreator::create(*solver_, clause_, ccFlags_s | ClauseCreator::clause_no_prepare, Constraint_t::Other);
}
else {
return s.force(clause_[0], this);
}
}
if (s.hasConflict() || !ok || (s.queueSize() && !s.propagateUntil(this))) {
if (!s.hasConflict()) { s.setStopConflict(); }
return false;
}
CLASP_FAIL_IF(dl < s.decisionLevel(), "invalid operation in propagation");
}
return true;
}
