Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:32 2012 Optimize a model with 438 rows, 126 columns and 876 nonzeros Presolve removed 70 rows and 0 columns Presolve time: 0.00s Presolved: 368 rows, 126 columns, 778 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.400000e+01, 160 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.00000 0 104 42.00000 54.00000 28.6% - 0s 0 0 52.90625 0 122 42.00000 52.90625 26.0% - 0s H 0 0 43.0000000 52.90625 23.0% - 0s 0 0 52.43182 0 122 43.00000 52.43182 21.9% - 0s H 0 0 44.0000000 52.43182 19.2% - 0s H 0 0 45.0000000 52.43182 16.5% - 0s 0 0 51.80203 0 124 45.00000 51.80203 15.1% - 0s 0 0 51.39037 0 122 45.00000 51.39037 14.2% - 0s 0 0 50.75676 0 124 45.00000 50.75676 12.8% - 0s 0 0 50.58427 0 125 45.00000 50.58427 12.4% - 0s H 0 0 46.0000000 50.58427 10.0% - 0s 0 0 50.42980 0 125 46.00000 50.42980 9.63% - 0s 0 0 50.21951 0 125 46.00000 50.21951 9.17% - 0s 0 0 50.11687 0 124 46.00000 50.11687 8.95% - 0s 0 0 50.04574 0 126 46.00000 50.04574 8.80% - 0s 0 0 49.97419 0 126 46.00000 49.97419 8.64% - 0s 0 0 49.89817 0 125 46.00000 49.89817 8.47% - 0s 0 0 49.87964 0 126 46.00000 49.87964 8.43% - 0s 0 0 49.87964 0 119 46.00000 49.87964 8.43% - 0s 0 2 49.87508 0 119 46.00000 49.87508 8.42% - 0s * 5 5 4 47.0000000 49.85294 6.07% 58.6 0s Cutting planes: Zero half: 80 Explored 55 nodes (3114 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%