Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:16:25 2012 Optimize a model with 355 rows, 264 columns and 1149 nonzeros Presolve time: 0.00s Presolved: 355 rows, 264 columns, 1149 nonzeros Variable types: 0 continuous, 264 integer (264 binary) Found heuristic solution: objective 78.0000000 Root relaxation: objective 0.000000e+00, 117 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 86 78.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s 0 0 0.61765 0 87 58.00000 0.61765 98.9% - 0s H 0 0 47.0000000 0.61765 98.7% - 0s 0 0 1.07754 0 88 47.00000 1.07754 97.7% - 0s H 0 0 44.0000000 1.07754 97.6% - 0s 0 0 1.29108 0 89 44.00000 1.29108 97.1% - 0s H 0 0 42.0000000 1.29108 96.9% - 0s 0 0 1.29158 0 90 42.00000 1.29158 96.9% - 0s 0 2 1.30236 0 90 42.00000 1.30236 96.9% - 0s * 52 44 32 36.0000000 3.21820 91.1% 28.1 0s H 136 101 34.0000000 4.65650 86.3% 27.3 0s * 211 157 23 33.0000000 4.77941 85.5% 30.3 0s * 549 347 25 32.0000000 7.23162 77.4% 27.8 0s * 749 398 31 31.0000000 8.95930 71.1% 27.3 1s 5864 234 29.48571 20 125 31.00000 25.45455 17.9% 21.2 5s Explored 6680 nodes (138489 simplex iterations) in 5.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%