Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:48:09 2012 Optimize a model with 841 rows, 184 columns and 1682 nonzeros Presolve removed 189 rows and 0 columns Presolve time: 0.00s Presolved: 652 rows, 184 columns, 1435 nonzeros Variable types: 0 continuous, 184 integer (184 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 7.350000e+01, 314 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.50000 0 145 50.00000 73.50000 47.0% - 0s 0 0 72.04307 0 182 50.00000 72.04307 44.1% - 0s H 0 0 52.0000000 72.04307 38.5% - 0s 0 0 71.33964 0 180 52.00000 71.33964 37.2% - 0s 0 0 70.47725 0 183 52.00000 70.47725 35.5% - 0s H 0 0 53.0000000 70.47725 33.0% - 0s 0 0 69.96757 0 181 53.00000 69.96757 32.0% - 0s 0 0 69.46711 0 183 53.00000 69.46711 31.1% - 0s 0 0 69.12777 0 184 53.00000 69.12777 30.4% - 0s 0 0 68.83683 0 183 53.00000 68.83683 29.9% - 0s 0 0 68.68233 0 183 53.00000 68.68233 29.6% - 0s 0 0 68.50419 0 183 53.00000 68.50419 29.3% - 0s 0 0 68.33962 0 182 53.00000 68.33962 28.9% - 0s H 0 0 54.0000000 68.33962 26.6% - 0s 0 0 68.26918 0 182 54.00000 68.26918 26.4% - 0s 0 0 68.23885 0 183 54.00000 68.23885 26.4% - 0s 0 0 68.23885 0 183 54.00000 68.23885 26.4% - 0s H 0 0 56.0000000 68.23885 21.9% - 0s 0 2 68.23684 0 183 56.00000 68.23684 21.9% - 0s H 98 57 58.0000000 67.33472 16.1% 48.9 0s 615 301 65.50130 16 178 58.00000 65.50130 12.9% 50.1 5s H 1894 628 59.0000000 64.61458 9.52% 44.1 7s 3098 1024 62.00000 26 136 59.00000 63.66667 7.91% 39.1 10s 7270 1271 60.50000 42 113 59.00000 62.00000 5.08% 32.6 15s Cutting planes: Gomory: 5 Clique: 1 Zero half: 66 Explored 10641 nodes (318365 simplex iterations) in 18.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%