Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:01:31 2012 Optimize a model with 5711 rows, 2352 columns and 19246 nonzeros Presolve removed 1346 rows and 2 columns Presolve time: 0.13s Presolved: 4365 rows, 2350 columns, 15896 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 3.000000e+00, 4075 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 56 48.00000 3.00000 93.8% - 2s H 0 0 14.0000000 3.00000 78.6% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 178 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 74 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 266 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 203 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 117 4.00000 3.00000 25.0% - 15s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 15s 0 2 3.00000 0 114 4.00000 3.00000 25.0% - 17s 4 4 3.00000 1 758 4.00000 3.00000 25.0% 869 22s 5 5 3.00000 1 101 4.00000 3.00000 25.0% 695 25s Cutting planes: Gomory: 10 Zero half: 79 Explored 7 nodes (138740 simplex iterations) in 29.17 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%