{ "instance_id": "network_design_small_s42", "problem_type": "network_design", "size": "small", "winner": "highs", "oracle_solver": "highs", "selector_accuracy": false, "par10_score": 0.08, "oracle_regret": 1.68, "results": [ { "solver_id": "cp_sat", "solver_config": { "time_limit_sec": 10.0, "num_search_workers": 4, "presolve": true, "search_branching": "automatic", "heuristic_frequency": 0.5 }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 2.81, "feasible": true, "time_to_first_feasible_sec": 0.0235, "best_bound": 150.8503, "gap_improvement_rate": 0.281, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 46 }, "solution": {} }, { "solver_id": "highs", "solver_config": { "time_limit_sec": 10.0, "presolve": "on", "threads": 4, "mip_rel_gap": 0.01, "cut_strategy": "aggressive" }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 1.13, "feasible": true, "time_to_first_feasible_sec": 0.0202, "best_bound": 152.1355, "gap_improvement_rate": 0.113, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 59 }, "solution": {} }, { "solver_id": "cbc", "solver_config": { "time_limit_sec": 10.0, "presolve": "on", "cuts": "on", "heuristics": "on", "threads": 2 }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 2.25, "feasible": true, "time_to_first_feasible_sec": 0.0224, "best_bound": 151.2788, "gap_improvement_rate": 0.225, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 51 }, "solution": {} }, { "solver_id": "scip", "solver_config": { "time_limit_sec": 10.0, "presolving": true, "separating": true, "heuristics": true, "threads": 4 }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 1.13, "feasible": true, "time_to_first_feasible_sec": 0.0202, "best_bound": 152.1355, "gap_improvement_rate": 0.113, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 59 }, "solution": {} }, { "solver_id": "glpk", "solver_config": { "time_limit_sec": 10.0, "presolve": true, "mip_gap": 0.02 }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 2.81, "feasible": true, "time_to_first_feasible_sec": 0.0235, "best_bound": 150.8503, "gap_improvement_rate": 0.281, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 46 }, "solution": {} }, { "solver_id": "gurobi", "solver_config": { "time_limit_sec": 10.0, "Presolve": 2, "MIPFocus": 1, "Heuristics": 0.25, "Threads": 4 }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 1.21, "feasible": true, "time_to_first_feasible_sec": 0.0203, "best_bound": 152.0744, "gap_improvement_rate": 0.121, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 58 }, "solution": {} }, { "solver_id": "minizinc", "solver_config": { "time_limit_sec": 10.0, "solver": "chuffed", "neighborhood_size": 12 }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 3.45, "feasible": true, "time_to_first_feasible_sec": 0.0248, "best_bound": 150.3607, "gap_improvement_rate": 0.345, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 42 }, "solution": {} }, { "solver_id": "alns", "solver_config": { "time_limit_sec": 10.0, "neighborhood_size": 24, "destroy_pct": 0.3, "initial_solution": "greedy" }, "instance_id": "network_design_small_s42", "problem_type": "network_design", "metrics": { "runtime_sec": 0.08, "optimality_gap_pct": 4.25, "feasible": true, "time_to_first_feasible_sec": 0.0264, "best_bound": 149.7488, "gap_improvement_rate": 0.425, "search_speed": 250.0, "objective_value": 154.224, "status": "FEASIBLE", "memory_mb": 12.04, "nodes": 36 }, "solution": {} } ], "instance_features": { "general": { "n_variables": 20, "n_constraints": 6, "pct_binary": 0.35, "pct_integer": 0.5, "sparsity": 0.3333, "coefficient_range": 100.0, "constraint_tightness": 0.62 }, "graph": { "graph_density": 3.3333, "clustering_coefficient": 0.38, "avg_degree": 3.3333, "connected_components": 1, "treewidth_approx": 2.4495 }, "problem": { "n_machines": 6, "n_jobs": 0, "capacity_utilization": 0.58, "customer_clustering": 0.0, "demand_variance": 0.0, "time_window_tightness": 0.0 } } }