Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:09:30 2012 Optimize a model with 335 rows, 225 columns and 1060 nonzeros Presolve time: 0.00s Presolved: 335 rows, 225 columns, 1060 nonzeros Variable types: 0 continuous, 225 integer (225 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 0.000000e+00, 93 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 58 71.00000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s 0 0 0.51748 0 61 56.00000 0.51748 99.1% - 0s H 0 0 54.0000000 0.51748 99.0% - 0s 0 0 0.67213 0 61 54.00000 0.67213 98.8% - 0s 0 0 0.73469 0 61 54.00000 0.73469 98.6% - 0s 0 0 0.74824 0 75 54.00000 0.74824 98.6% - 0s 0 0 0.75000 0 61 54.00000 0.75000 98.6% - 0s 0 0 0.77551 0 61 54.00000 0.77551 98.6% - 0s 0 0 0.79552 0 66 54.00000 0.79552 98.5% - 0s 0 0 0.83735 0 63 54.00000 0.83735 98.4% - 0s 0 0 0.85897 0 62 54.00000 0.85897 98.4% - 0s 0 0 0.85897 0 62 54.00000 0.85897 98.4% - 0s 0 0 0.85897 0 62 54.00000 0.85897 98.4% - 0s 0 2 0.86006 0 62 54.00000 0.86006 98.4% - 0s * 34 34 19 46.0000000 5.87500 87.2% 29.5 0s * 224 163 22 45.0000000 11.30769 74.9% 22.8 0s * 255 176 23 44.0000000 12.85714 70.8% 21.7 0s * 457 218 15 41.0000000 16.80000 59.0% 19.8 0s * 797 318 30 40.0000000 18.70588 53.2% 22.4 0s * 2049 270 30 39.0000000 25.10000 35.6% 23.2 1s * 3833 109 26 38.0000000 31.54545 17.0% 22.3 3s Explored 4117 nodes (90772 simplex iterations) in 3.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0%