Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:01:53 2012 Optimize a model with 10799 rows, 3660 columns and 35758 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.28s Presolved: 10797 rows, 3658 columns, 35398 nonzeros Variable types: 0 continuous, 3658 integer (3658 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 2.000000e+00, 2538 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 120 60.00000 2.00000 96.7% - 0s H 0 0 59.0000000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 3023 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 1662 5.00000 2.66667 46.7% - 3s 0 0 2.66667 0 1764 5.00000 2.66667 46.7% - 4s 0 0 2.66667 0 262 5.00000 2.66667 46.7% - 12s H 0 0 4.0000000 2.66667 33.3% - 13s 0 0 2.67836 0 2966 4.00000 2.67836 33.0% - 20s 0 0 2.67925 0 2806 4.00000 2.67925 33.0% - 25s 0 0 3.00000 0 155 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 150 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 161 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 156 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 159 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 148 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 155 4.00000 3.00000 25.0% - 29s 0 0 3.00000 0 143 4.00000 3.00000 25.0% - 29s 0 2 3.00000 0 142 4.00000 3.00000 25.0% - 29s Cutting planes: Gomory: 11 Zero half: 119 Explored 6 nodes (76464 simplex iterations) in 29.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%