static void track_clause(sat::solver& dst,
sat::literal_vector& lits,
sat::literal_vector& assumptions,
vector<sat::literal_vector>& tracking_clauses) {
sat::literal lit = sat::literal(dst.mk_var(true, false), false);
tracking_clauses.set(lit.var(), lits);
lits.push_back(~lit);
dst.mk_clause(lits.size(), lits.c_ptr());
assumptions.push_back(lit);
}
bool parse_dimacs_core(Buffer & in, std::ostream& err, sat::solver & solver) {
sat::literal_vector lits;
try {
while (true) {
skip_whitespace(in);
if (*in == EOF) {
break;
}
else if (*in == 'c' || *in == 'p') {
skip_line(in);
}
else {
read_clause(in, err, solver, lits);
solver.mk_clause(lits.size(), lits.c_ptr());
}
}
}
catch (lex_error) {
return false;
}
return true;
}