Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:20 2012 Optimize a model with 484 rows, 139 columns and 968 nonzeros Presolve removed 100 rows and 4 columns Presolve time: 0.00s Presolved: 384 rows, 135 columns, 819 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 5.987500e+01, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.87500 0 130 49.00000 59.87500 22.2% - 0s 0 0 59.00000 0 130 49.00000 59.00000 20.4% - 0s H 0 0 50.0000000 59.00000 18.0% - 0s 0 0 58.11899 0 132 50.00000 58.11899 16.2% - 0s 0 0 57.34426 0 132 50.00000 57.34426 14.7% - 0s 0 0 56.93750 0 130 50.00000 56.93750 13.9% - 0s H 0 0 51.0000000 56.93750 11.6% - 0s 0 0 56.86800 0 131 51.00000 56.86800 11.5% - 0s 0 0 56.69065 0 131 51.00000 56.69065 11.2% - 0s 0 0 56.64118 0 132 51.00000 56.64118 11.1% - 0s 0 0 56.50307 0 132 51.00000 56.50307 10.8% - 0s 0 0 56.33556 0 132 51.00000 56.33556 10.5% - 0s 0 0 56.23975 0 132 51.00000 56.23975 10.3% - 0s 0 0 56.21931 0 132 51.00000 56.21931 10.2% - 0s 0 0 56.21931 0 131 51.00000 56.21931 10.2% - 0s 0 2 56.21644 0 131 51.00000 56.21644 10.2% - 0s * 6 6 5 52.0000000 56.21554 8.11% 49.8 0s * 236 5 14 53.0000000 54.01020 1.91% 31.8 0s Cutting planes: Zero half: 98 Explored 242 nodes (8556 simplex iterations) in 0.34 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%