diff --git a/examples/c++/example.cpp b/examples/c++/example.cpp index b348e7d36..0d8a3ceb3 100644 --- a/examples/c++/example.cpp +++ b/examples/c++/example.cpp @@ -21,6 +21,7 @@ void demorgan() { // adding the negation of the conjecture as a constraint. s.add(!conjecture); std::cout << s << "\n"; + std::cout << s.to_smt2() << "\n"; switch (s.check()) { case unsat: std::cout << "de-Morgan is valid\n"; break; case sat: std::cout << "de-Morgan is not valid\n"; break; diff --git a/src/api/c++/z3++.h b/src/api/c++/z3++.h index c35208d86..7380e52f1 100644 --- a/src/api/c++/z3++.h +++ b/src/api/c++/z3++.h @@ -1314,6 +1314,26 @@ namespace z3 { expr_vector assertions() const { Z3_ast_vector r = Z3_solver_get_assertions(ctx(), m_solver); check_error(); return expr_vector(ctx(), r); } expr proof() const { Z3_ast r = Z3_solver_get_proof(ctx(), m_solver); check_error(); return expr(ctx(), r); } friend std::ostream & operator<<(std::ostream & out, solver const & s) { out << Z3_solver_to_string(s.ctx(), s); return out; } + + std::string to_smt2(char const* status = "unknown") { + array es(assertions()); + Z3_ast const* fmls = es.ptr(); + Z3_ast fml = 0; + unsigned sz = es.size(); + if (sz > 0) { + --sz; + fml = fmls[sz]; + } + else { + fml = ctx().bool_val(true); + } + return std::string(Z3_benchmark_to_smtlib_string( + ctx(), + "", "", status, "", + sz, + fmls, + fml)); + } }; class goal : public object {