Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:11:03 2012 Optimize a model with 7289 rows, 2970 columns and 24568 nonzeros Presolve removed 1676 rows and 2 columns Presolve time: 0.21s Presolved: 5613 rows, 2968 columns, 20418 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 3.000000e+00, 5311 iterations, 0.83 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 1303 54.00000 3.00000 94.4% - 2s H 0 0 47.0000000 3.00000 93.6% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 1259 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 130 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 118 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 70 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 117 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 117 4.00000 3.00000 25.0% - 23s 0 2 3.00000 0 117 4.00000 3.00000 25.0% - 26s 4 4 3.00000 1 115 4.00000 3.00000 25.0% 833 32s 6 6 3.00000 1 105 4.00000 3.00000 25.0% 556 37s 8 7 3.00000 1 100 4.00000 3.00000 25.0% 417 40s 10 8 3.00000 1 101 4.00000 3.00000 25.0% 333 47s 13 12 3.00000 12 94 4.00000 3.00000 25.0% 7953 52s 15 14 3.00000 13 107 4.00000 3.00000 25.0% 6999 57s 18 12 3.00000 14 88 4.00000 3.00000 25.0% 6122 60s Cutting planes: Gomory: 7 Zero half: 9 Explored 25 nodes (216810 simplex iterations) in 63.23 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%