Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:23 2012 Optimize a model with 559 rows, 153 columns and 1118 nonzeros Presolve removed 111 rows and 3 columns Presolve time: 0.00s Presolved: 448 rows, 150 columns, 964 nonzeros Variable types: 0 continuous, 150 integer (150 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.450000e+01, 267 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.50000 0 117 49.00000 64.50000 31.6% - 0s 0 0 63.55000 0 145 49.00000 63.55000 29.7% - 0s H 0 0 50.0000000 63.55000 27.1% - 0s H 0 0 51.0000000 63.55000 24.6% - 0s H 0 0 52.0000000 63.55000 22.2% - 0s 0 0 62.48889 0 146 52.00000 62.48889 20.2% - 0s 0 0 62.03704 0 150 52.00000 62.03704 19.3% - 0s 0 0 61.35683 0 147 52.00000 61.35683 18.0% - 0s 0 0 61.24325 0 149 52.00000 61.24325 17.8% - 0s 0 0 61.14352 0 149 52.00000 61.14352 17.6% - 0s 0 0 61.01830 0 150 52.00000 61.01830 17.3% - 0s 0 0 60.85356 0 150 52.00000 60.85356 17.0% - 0s 0 0 60.79835 0 150 52.00000 60.79835 16.9% - 0s 0 0 60.68095 0 150 52.00000 60.68095 16.7% - 0s 0 0 60.52400 0 150 52.00000 60.52400 16.4% - 0s 0 0 60.48479 0 150 52.00000 60.48479 16.3% - 0s 0 0 60.48479 0 149 52.00000 60.48479 16.3% - 0s H 0 0 53.0000000 60.48479 14.1% - 0s H 0 0 54.0000000 60.48479 12.0% - 0s 0 2 60.48479 0 148 54.00000 60.48479 12.0% - 0s H 36 6 57.0000000 60.20007 5.61% 42.2 0s Cutting planes: Zero half: 99 Explored 98 nodes (5489 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%