Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:13 2012 Optimize a model with 468 rows, 138 columns and 936 nonzeros Presolve removed 105 rows and 5 columns Presolve time: 0.00s Presolved: 363 rows, 133 columns, 780 nonzeros Variable types: 0 continuous, 133 integer (133 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.825000e+01, 209 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.25000 0 106 46.00000 58.25000 26.6% - 0s 0 0 56.90000 0 126 46.00000 56.90000 23.7% - 0s H 0 0 50.0000000 56.90000 13.8% - 0s 0 0 56.50000 0 127 50.00000 56.50000 13.0% - 0s H 0 0 51.0000000 56.50000 10.8% - 0s 0 0 56.30769 0 130 51.00000 56.30769 10.4% - 0s 0 0 55.90909 0 129 51.00000 55.90909 9.63% - 0s 0 0 55.70690 0 133 51.00000 55.70690 9.23% - 0s 0 0 55.52381 0 129 51.00000 55.52381 8.87% - 0s 0 0 55.38799 0 131 51.00000 55.38799 8.60% - 0s 0 0 55.29773 0 131 51.00000 55.29773 8.43% - 0s 0 0 55.20186 0 130 51.00000 55.20186 8.24% - 0s 0 0 55.15258 0 132 51.00000 55.15258 8.14% - 0s 0 0 55.14236 0 132 51.00000 55.14236 8.12% - 0s 0 0 55.14236 0 132 51.00000 55.14236 8.12% - 0s 0 2 55.14023 0 132 51.00000 55.14023 8.12% - 0s * 46 14 10 52.0000000 54.70211 5.20% 34.3 0s * 65 2 3 53.0000000 54.22396 2.31% 33.4 0s Cutting planes: Gomory: 1 Zero half: 84 Explored 68 nodes (3025 simplex iterations) in 0.16 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%