Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:29:19 2013 Optimize a model with 1046 rows, 21668 columns and 877553 nonzeros Presolve removed 31 rows and 123 columns Presolve time: 4.71s Presolved: 1015 rows, 21545 columns, 873497 nonzeros Variable types: 0 continuous, 21545 integer (21545 binary) Found heuristic solution: objective 11487.000000 Root relaxation: objective 7.148200e+03, 4223 iterations, 1.56 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 7148.20000 0 84 11487.0000 7148.20000 37.8% - 6s H 0 0 7242.0000000 7148.20000 1.30% - 7s 0 0 7153.25000 0 57 7242.00000 7153.25000 1.23% - 8s 0 0 7153.25000 0 69 7242.00000 7153.25000 1.23% - 11s 0 0 7159.25000 0 107 7242.00000 7159.25000 1.14% - 12s 0 0 7160.97500 0 97 7242.00000 7160.97500 1.12% - 12s 0 0 7163.00000 0 51 7242.00000 7163.00000 1.09% - 13s 0 0 7165.16000 0 177 7242.00000 7165.16000 1.06% - 14s 0 0 7165.50000 0 163 7242.00000 7165.50000 1.06% - 15s 0 0 7165.80000 0 142 7242.00000 7165.80000 1.05% - 15s 0 0 7170.00000 0 116 7242.00000 7170.00000 0.99% - 16s 0 0 7170.26087 0 224 7242.00000 7170.26087 0.99% - 16s 0 0 7171.00000 0 148 7242.00000 7171.00000 0.98% - 17s 0 0 7171.00000 0 46 7242.00000 7171.00000 0.98% - 18s 0 0 7171.00515 0 188 7242.00000 7171.00515 0.98% - 18s 0 0 7171.06931 0 219 7242.00000 7171.06931 0.98% - 19s 0 0 7171.19444 0 228 7242.00000 7171.19444 0.98% - 19s 0 0 7171.57143 0 212 7242.00000 7171.57143 0.97% - 20s 0 0 7173.48387 0 236 7242.00000 7173.48387 0.95% - 21s 0 0 7173.72289 0 228 7242.00000 7173.72289 0.94% - 21s 0 0 7174.26087 0 206 7242.00000 7174.26087 0.94% - 22s 0 0 7176.70358 0 193 7242.00000 7176.70358 0.90% - 23s 0 0 7177.05000 0 187 7242.00000 7177.05000 0.90% - 23s 0 0 7177.26923 0 197 7242.00000 7177.26923 0.89% - 23s 0 0 7177.38542 0 202 7242.00000 7177.38542 0.89% - 24s 0 0 7177.44000 0 188 7242.00000 7177.44000 0.89% - 24s 0 0 7177.45262 0 214 7242.00000 7177.45262 0.89% - 25s 0 0 7177.45455 0 236 7242.00000 7177.45455 0.89% - 26s 0 0 7177.45455 0 174 7242.00000 7177.45455 0.89% - 26s 0 0 7177.47475 0 225 7242.00000 7177.47475 0.89% - 27s 0 0 7177.48701 0 192 7242.00000 7177.48701 0.89% - 28s 0 0 7177.49091 0 226 7242.00000 7177.49091 0.89% - 29s 0 0 7177.49091 0 223 7242.00000 7177.49091 0.89% - 32s 0 2 7178.26667 0 207 7242.00000 7178.26667 0.88% - 40s * 1 1 1 7195.0000000 7180.99588 0.19% 387 40s Cutting planes: Gomory: 1 Clique: 34 Zero half: 13 Mod-K: 1 Explored 3 nodes (13629 simplex iterations) in 40.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.194999999998e+03, best bound 7.194999999998e+03, gap 0.0%