Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:30 2012 Optimize a model with 624 rows, 153 columns and 1248 nonzeros Presolve removed 135 rows and 0 columns Presolve time: 0.00s Presolved: 489 rows, 153 columns, 1065 nonzeros Variable types: 0 continuous, 153 integer (153 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.250000e+01, 266 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62.50000 0 117 45.00000 62.50000 38.9% - 0s 0 0 60.78017 0 150 45.00000 60.78017 35.1% - 0s H 0 0 47.0000000 60.78017 29.3% - 0s 0 0 60.45607 0 150 47.00000 60.45607 28.6% - 0s H 0 0 48.0000000 60.45607 26.0% - 0s 0 0 60.07678 0 150 48.00000 60.07678 25.2% - 0s H 0 0 50.0000000 60.07678 20.2% - 0s 0 0 59.64009 0 151 50.00000 59.64009 19.3% - 0s 0 0 59.24852 0 150 50.00000 59.24852 18.5% - 0s 0 0 58.93049 0 147 50.00000 58.93049 17.9% - 0s 0 0 58.72469 0 151 50.00000 58.72469 17.4% - 0s 0 0 58.67216 0 150 50.00000 58.67216 17.3% - 0s 0 0 58.59823 0 152 50.00000 58.59823 17.2% - 0s 0 0 58.41205 0 151 50.00000 58.41205 16.8% - 0s 0 0 58.33219 0 152 50.00000 58.33219 16.7% - 0s 0 0 58.30003 0 153 50.00000 58.30003 16.6% - 0s 0 0 58.30003 0 151 50.00000 58.30003 16.6% - 0s H 0 0 51.0000000 58.30003 14.3% - 0s H 0 0 53.0000000 58.30003 10.0% - 0s 0 2 58.29684 0 151 53.00000 58.29684 10.0% - 0s Cutting planes: Gomory: 2 Zero half: 159 Explored 901 nodes (31140 simplex iterations) in 1.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%