Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:26:51 2012 Optimize a model with 5813 rows, 2652 columns and 19837 nonzeros Presolve removed 1330 rows and 104 columns Presolve time: 0.14s Presolved: 4483 rows, 2548 columns, 16448 nonzeros Variable types: 0 continuous, 2548 integer (2548 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 3.000000e+00, 4612 iterations, 0.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 173 51.00000 3.00000 94.1% - 3s H 0 0 19.0000000 3.00000 84.2% - 3s H 0 0 8.0000000 3.00000 62.5% - 3s H 0 0 6.0000000 3.00000 50.0% - 3s 0 0 3.00000 0 118 6.00000 3.00000 50.0% - 4s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 3.00000 0 109 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 116 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 101 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 118 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 44 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 120 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 98 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 118 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 20s 0 2 3.00000 0 112 4.00000 3.00000 25.0% - 21s 4 4 3.00000 1 95 4.00000 3.00000 25.0% 435 26s 7 6 3.00000 1 105 4.00000 3.00000 25.0% 249 31s 9 8 3.00000 1 90 4.00000 3.00000 25.0% 193 35s 13 12 3.00000 13 112 4.00000 3.00000 25.0% 5969 42s 15 14 3.00000 14 101 4.00000 3.00000 25.0% 5271 46s 19 12 3.00000 16 329 4.00000 3.00000 25.0% 4511 56s Cutting planes: Gomory: 15 Clique: 1 Zero half: 15 Explored 29 nodes (199123 simplex iterations) in 57.91 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%