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Dump presolved problem to file #459

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Dump presolved problem to file #459

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6 changes: 5 additions & 1 deletion cpp/src/linear_programming/solve.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -845,6 +845,10 @@ optimization_problem_solution_t<i_t, f_t> solve_lp(optimization_problem_t<i_t, f
return optimization_problem_solution_t<i_t, f_t>(
pdlp_termination_status_t::PrimalInfeasible, op_problem.get_handle_ptr()->get_stream());
}
if (settings.user_problem_file != "") {
CUOPT_LOG_INFO("Writing presolved problem to file: %s", settings.user_problem_file.c_str());
reduced_problem.write_to_mps(settings.user_problem_file);
}
problem = detail::problem_t<i_t, f_t>(reduced_problem);
presolve_time = lp_timer.elapsed_time();
CUOPT_LOG_INFO("Papilo presolve time: %f", presolve_time);
Expand All @@ -860,7 +864,7 @@ optimization_problem_solution_t<i_t, f_t> solve_lp(optimization_problem_t<i_t, f
problem.presolve_data.objective_offset,
problem.presolve_data.objective_scaling_factor);

if (settings.user_problem_file != "") {
if (settings.user_problem_file != "" && !run_presolve) {
CUOPT_LOG_INFO("Writing user problem to file: %s", settings.user_problem_file.c_str());
op_problem.write_to_mps(settings.user_problem_file);
}
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7 changes: 6 additions & 1 deletion cpp/src/mip/solve.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -219,11 +219,16 @@ mip_solution_t<i_t, f_t> solve_mip(optimization_problem_t<i_t, f_t>& op_problem,
op_problem.get_handle_ptr()->get_stream());
}

if (settings.user_problem_file != "") {
CUOPT_LOG_INFO("Writing presolved problem to file: %s", settings.user_problem_file.c_str());
reduced_op_problem.write_to_mps(settings.user_problem_file);
}

problem = detail::problem_t<i_t, f_t>(reduced_op_problem);
presolve_time = timer.elapsed_time();
CUOPT_LOG_INFO("Papilo presolve time: %f", presolve_time);
}
if (settings.user_problem_file != "") {
if (settings.user_problem_file != "" && !run_presolve) {
CUOPT_LOG_INFO("Writing user problem to file: %s", settings.user_problem_file.c_str());
op_problem.write_to_mps(settings.user_problem_file);
}
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