Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:41 2012 Optimize a model with 245 rows, 144 columns and 754 nonzeros Presolve time: 0.00s Presolved: 245 rows, 144 columns, 754 nonzeros Variable types: 0 continuous, 144 integer (144 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 67.0000000 Root relaxation: objective 0.000000e+00, 42 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 22 67.00000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s H 0 0 60.0000000 0.00000 100% - 0s 0 0 0.61111 0 23 60.00000 0.61111 99.0% - 0s 0 0 1.24444 0 25 60.00000 1.24444 97.9% - 0s 0 0 1.32778 0 25 60.00000 1.32778 97.8% - 0s 0 0 1.41111 0 26 60.00000 1.41111 97.6% - 0s 0 0 1.41111 0 25 60.00000 1.41111 97.6% - 0s 0 0 1.49444 0 26 60.00000 1.49444 97.5% - 0s 0 0 1.50000 0 25 60.00000 1.50000 97.5% - 0s 0 0 1.50556 0 25 60.00000 1.50556 97.5% - 0s 0 0 1.52222 0 26 60.00000 1.52222 97.5% - 0s 0 0 1.52639 0 30 60.00000 1.52639 97.5% - 0s 0 0 1.60556 0 25 60.00000 1.60556 97.3% - 0s H 0 0 55.0000000 1.60556 97.1% - 0s 0 0 1.60805 0 28 55.00000 1.60805 97.1% - 0s 0 0 1.60805 0 28 55.00000 1.60805 97.1% - 0s 0 2 1.61915 0 28 55.00000 1.61915 97.1% - 0s * 22 18 12 54.0000000 8.33333 84.6% 36.8 0s * 77 45 15 53.0000000 12.03704 77.3% 27.5 0s H 187 117 52.0000000 15.94444 69.3% 28.1 0s * 214 123 17 51.0000000 16.62222 67.4% 26.3 0s * 240 129 11 49.0000000 18.45238 62.3% 25.5 0s * 376 163 11 48.0000000 23.92929 50.1% 24.4 0s Explored 3649 nodes (62396 simplex iterations) in 1.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%