Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:28:34 2012 Optimize a model with 10934 rows, 5112 columns and 37630 nonzeros Presolve removed 1989 rows and 71 columns Presolve time: 0.20s Presolved: 8945 rows, 5041 columns, 32802 nonzeros Variable types: 0 continuous, 5041 integer (5041 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 3.000000e+00, 8839 iterations, 1.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 54 42.00000 3.00000 92.9% - 4s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 3.00000 0 75 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 146 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 119 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 169 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 182 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 193 4.00000 3.00000 25.0% - 25s 0 0 3.00000 0 193 4.00000 3.00000 25.0% - 28s 0 2 3.00000 0 193 4.00000 3.00000 25.0% - 35s 5 5 3.00000 1 129 4.00000 3.00000 25.0% 1895 43s 6 6 3.00000 1 143 4.00000 3.00000 25.0% 1580 49s 7 6 3.00000 1 204 4.00000 3.00000 25.0% 1354 59s 8 7 3.00000 1 141 4.00000 3.00000 25.0% 1185 62s 12 10 3.00000 17 104 4.00000 3.00000 25.0% 10114 66s 21 6 infeasible 21 4.00000 3.00000 25.0% 6436 70s Cutting planes: Gomory: 5 Zero half: 5 Explored 26 nodes (283359 simplex iterations) in 71.57 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%