void read_clause(Buffer & in, std::ostream& err, sat::solver & solver, sat::literal_vector & lits) { int parsed_lit; int var; lits.reset(); while (true) { parsed_lit = parse_int(in, err); if (parsed_lit == 0) break; var = abs(parsed_lit); SASSERT(var > 0); while (static_cast<unsigned>(var) >= solver.num_vars()) solver.mk_var(); lits.push_back(sat::literal(var, parsed_lit < 0)); } }