Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:06:59 2012 Optimize a model with 753 rows, 172 columns and 1506 nonzeros Presolve removed 162 rows and 2 columns Presolve time: 0.00s Presolved: 591 rows, 170 columns, 1280 nonzeros Variable types: 0 continuous, 170 integer (170 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.000000e+01, 320 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.00000 0 138 51.00000 70.00000 37.3% - 0s 0 0 68.85714 0 167 51.00000 68.85714 35.0% - 0s 0 0 67.54340 0 165 51.00000 67.54340 32.4% - 0s H 0 0 54.0000000 67.54340 25.1% - 0s 0 0 66.90861 0 167 54.00000 66.90861 23.9% - 0s 0 0 66.38641 0 168 54.00000 66.38641 22.9% - 0s H 0 0 55.0000000 66.38641 20.7% - 0s 0 0 65.73776 0 167 55.00000 65.73776 19.5% - 0s 0 0 65.46435 0 168 55.00000 65.46435 19.0% - 0s 0 0 65.33429 0 168 55.00000 65.33429 18.8% - 0s 0 0 65.23557 0 167 55.00000 65.23557 18.6% - 0s 0 0 65.10048 0 168 55.00000 65.10048 18.4% - 0s 0 0 65.01660 0 167 55.00000 65.01660 18.2% - 0s 0 0 64.99602 0 168 55.00000 64.99602 18.2% - 0s 0 0 64.99602 0 165 55.00000 64.99602 18.2% - 0s H 0 0 56.0000000 64.99602 16.1% - 0s 0 2 64.99602 0 165 56.00000 64.99602 16.1% - 0s H 335 121 57.0000000 63.50455 11.4% 41.4 0s 613 239 61.57551 6 167 57.00000 62.85730 10.3% 39.9 5s 1260 352 59.75000 29 128 57.00000 61.93720 8.66% 48.4 10s * 1898 387 30 58.0000000 61.16279 5.45% 44.9 11s Cutting planes: Gomory: 3 Zero half: 189 Explored 2901 nodes (119479 simplex iterations) in 13.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%