Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:37:59 2012 Optimize a model with 5129 rows, 2070 columns and 17233 nonzeros Presolve removed 1172 rows and 2 columns Presolve time: 0.11s Presolved: 3957 rows, 2068 columns, 14312 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 3.000000e+00, 3399 iterations, 0.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 821 45.00000 3.00000 93.3% - 1s H 0 0 27.0000000 3.00000 88.9% - 1s H 0 0 9.0000000 3.00000 66.7% - 1s H 0 0 8.0000000 3.00000 62.5% - 1s 0 0 3.00000 0 762 8.00000 3.00000 62.5% - 1s H 0 0 6.0000000 3.00000 50.0% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 1281 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 104 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 9s 0 2 3.00000 0 99 4.00000 3.00000 25.0% - 11s 4 4 3.00000 1 52 4.00000 3.00000 25.0% 352 15s 7 6 3.00000 1 100 4.00000 3.00000 25.0% 201 20s 9 8 3.00000 1 108 4.00000 3.00000 25.0% 156 26s Cutting planes: Gomory: 2 Clique: 2 Zero half: 12 Explored 14 nodes (125502 simplex iterations) in 28.76 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%