Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:41:43 2012 Optimize a model with 669 rows, 158 columns and 1338 nonzeros Presolve removed 137 rows and 0 columns Presolve time: 0.00s Presolved: 532 rows, 158 columns, 1164 nonzeros Variable types: 0 continuous, 158 integer (158 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.460000e+01, 300 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.60000 0 140 47.00000 64.60000 37.4% - 0s 0 0 62.97943 0 153 47.00000 62.97943 34.0% - 0s 0 0 61.67914 0 152 47.00000 61.67914 31.2% - 0s H 0 0 48.0000000 61.67914 28.5% - 0s 0 0 60.87919 0 154 48.00000 60.87919 26.8% - 0s H 0 0 50.0000000 60.87919 21.8% - 0s 0 0 60.61120 0 156 50.00000 60.61120 21.2% - 0s 0 0 60.38316 0 155 50.00000 60.38316 20.8% - 0s H 0 0 52.0000000 60.38316 16.1% - 0s 0 0 60.22980 0 157 52.00000 60.22980 15.8% - 0s 0 0 60.09286 0 154 52.00000 60.09286 15.6% - 0s 0 0 60.02066 0 156 52.00000 60.02066 15.4% - 0s 0 0 59.94436 0 156 52.00000 59.94436 15.3% - 0s 0 0 59.84024 0 156 52.00000 59.84024 15.1% - 0s 0 0 59.78036 0 157 52.00000 59.78036 15.0% - 0s 0 0 59.71095 0 158 52.00000 59.71095 14.8% - 0s 0 0 59.66719 0 158 52.00000 59.66719 14.7% - 0s 0 0 59.66719 0 157 52.00000 59.66719 14.7% - 0s H 0 0 53.0000000 59.66719 12.6% - 0s 0 2 59.66617 0 156 53.00000 59.66617 12.6% - 0s * 13 12 8 54.0000000 59.54638 10.3% 69.9 0s Cutting planes: Gomory: 1 Zero half: 157 Explored 766 nodes (32750 simplex iterations) in 1.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%