Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:56:55 2012 Optimize a model with 265 rows, 181 columns and 841 nonzeros Presolve time: 0.00s Presolved: 265 rows, 181 columns, 841 nonzeros Variable types: 0 continuous, 181 integer (181 binary) Found heuristic solution: objective 63.0000000 Found heuristic solution: objective 59.0000000 Root relaxation: objective 0.000000e+00, 86 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 48 59.00000 0.00000 100% - 0s H 0 0 57.0000000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s 0 0 0.52273 0 49 52.00000 0.52273 99.0% - 0s H 0 0 49.0000000 0.52273 98.9% - 0s 0 0 1.02381 0 50 49.00000 1.02381 97.9% - 0s 0 0 1.11340 0 51 49.00000 1.11340 97.7% - 0s 0 0 1.11458 0 51 49.00000 1.11458 97.7% - 0s 0 0 1.14835 0 53 49.00000 1.14835 97.7% - 0s 0 0 1.16220 0 52 49.00000 1.16220 97.6% - 0s 0 0 1.17817 0 53 49.00000 1.17817 97.6% - 0s 0 0 1.17852 0 54 49.00000 1.17852 97.6% - 0s 0 0 1.17852 0 54 49.00000 1.17852 97.6% - 0s 0 2 1.20458 0 54 49.00000 1.20458 97.5% - 0s * 31 31 17 42.0000000 4.90647 88.3% 32.7 0s * 62 51 20 37.0000000 4.96625 86.6% 27.0 0s * 134 91 19 34.0000000 8.13915 76.1% 27.8 0s H 136 85 33.0000000 8.13915 75.3% 27.4 0s * 813 261 27 32.0000000 17.63810 44.9% 24.5 0s * 1679 218 31 31.0000000 22.00000 29.0% 21.3 1s * 1681 204 29 30.0000000 22.00000 26.7% 21.3 1s Explored 2474 nodes (49328 simplex iterations) in 1.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%