Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:51:25 2012 Optimize a model with 11752 rows, 5402 columns and 40294 nonzeros Presolve removed 1610 rows and 148 columns Presolve time: 0.53s Presolved: 10142 rows, 5254 columns, 36074 nonzeros Variable types: 0 continuous, 5254 integer (5254 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 3.000000e+00, 7863 iterations, 1.36 seconds Total elapsed time = 5.29s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 106 73.00000 3.00000 95.9% - 8s H 0 0 37.0000000 3.00000 91.9% - 8s H 0 0 5.0000000 3.00000 40.0% - 8s 0 0 3.00000 0 136 5.00000 3.00000 40.0% - 8s H 0 0 4.0000000 3.00000 25.0% - 8s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 93 4.00000 3.00000 25.0% - 21s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 26s 0 0 3.00000 0 127 4.00000 3.00000 25.0% - 31s 0 0 3.00000 0 122 4.00000 3.00000 25.0% - 35s 0 0 3.00000 0 134 4.00000 3.00000 25.0% - 38s 0 0 3.00000 0 189 4.00000 3.00000 25.0% - 46s 0 0 3.00000 0 135 4.00000 3.00000 25.0% - 49s 0 2 3.00000 0 122 4.00000 3.00000 25.0% - 55s 4 4 3.00000 1 172 4.00000 3.00000 25.0% 4253 66s 5 5 3.00000 1 75 4.00000 3.00000 25.0% 3402 77s 6 6 3.00000 1 82 4.00000 3.00000 25.0% 2835 83s 7 6 3.00000 1 112 4.00000 3.00000 25.0% 2430 92s 8 7 3.00000 1 2846 4.00000 3.00000 25.0% 2126 100s Cutting planes: Gomory: 9 Clique: 4 Zero half: 12 Explored 39 nodes (354527 simplex iterations) in 104.69 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%