Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:38:27 2012 Optimize a model with 580 rows, 155 columns and 1160 nonzeros Presolve removed 113 rows and 0 columns Presolve time: 0.00s Presolved: 467 rows, 155 columns, 1003 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 6.431579e+01, 325 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.31579 0 149 44.00000 64.31579 46.2% - 0s H 0 0 53.0000000 64.31579 21.4% - 0s 0 0 63.08704 0 152 53.00000 63.08704 19.0% - 0s 0 0 62.67107 0 150 53.00000 62.67107 18.2% - 0s 0 0 62.22826 0 152 53.00000 62.22826 17.4% - 0s 0 0 62.03677 0 152 53.00000 62.03677 17.1% - 0s 0 0 61.70531 0 152 53.00000 61.70531 16.4% - 0s 0 0 61.43548 0 152 53.00000 61.43548 15.9% - 0s 0 0 61.17818 0 153 53.00000 61.17818 15.4% - 0s H 0 0 54.0000000 61.17818 13.3% - 0s 0 0 61.03533 0 152 54.00000 61.03533 13.0% - 0s 0 0 60.63732 0 154 54.00000 60.63732 12.3% - 0s 0 0 60.57065 0 154 54.00000 60.57065 12.2% - 0s 0 0 60.50134 0 152 54.00000 60.50134 12.0% - 0s 0 0 60.47682 0 149 54.00000 60.47682 12.0% - 0s 0 0 60.44485 0 151 54.00000 60.44485 11.9% - 0s 0 0 60.44485 0 151 54.00000 60.44485 11.9% - 0s H 0 0 55.0000000 60.44485 9.90% - 0s 0 2 60.44485 0 151 55.00000 60.44485 9.90% - 0s * 371 42 6 56.0000000 58.28125 4.07% 40.1 0s Cutting planes: Zero half: 149 Explored 465 nodes (18918 simplex iterations) in 0.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%