Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:12 2012 Optimize a model with 274 rows, 105 columns and 548 nonzeros Presolve removed 50 rows and 6 columns Presolve time: 0.00s Presolved: 224 rows, 99 columns, 467 nonzeros Variable types: 0 continuous, 99 integer (99 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 4.750000e+01, 134 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.50000 0 85 39.00000 47.50000 21.8% - 0s H 0 0 40.0000000 47.50000 18.8% - 0s 0 0 46.66667 0 95 40.00000 46.66667 16.7% - 0s H 0 0 41.0000000 46.66667 13.8% - 0s 0 0 46.50000 0 79 41.00000 46.50000 13.4% - 0s 0 0 46.21429 0 99 41.00000 46.21429 12.7% - 0s 0 0 45.66667 0 99 41.00000 45.66667 11.4% - 0s 0 0 45.20188 0 99 41.00000 45.20188 10.2% - 0s 0 0 45.03704 0 99 41.00000 45.03704 9.85% - 0s 0 0 44.85824 0 98 41.00000 44.85824 9.41% - 0s 0 0 44.72000 0 99 41.00000 44.72000 9.07% - 0s 0 0 44.62161 0 99 41.00000 44.62161 8.83% - 0s 0 0 44.57641 0 98 41.00000 44.57641 8.72% - 0s 0 0 44.47214 0 99 41.00000 44.47214 8.47% - 0s 0 0 44.44826 0 99 41.00000 44.44826 8.41% - 0s 0 0 44.44826 0 99 41.00000 44.44826 8.41% - 0s H 0 0 42.0000000 44.44826 5.83% - 0s 0 2 44.44577 0 99 42.00000 44.44577 5.82% - 0s Cutting planes: Zero half: 63 Explored 44 nodes (1505 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.200000000000e+01, best bound 4.200000000000e+01, gap 0.0%