Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:57:23 2012 Optimize a model with 6624 rows, 2862 columns and 22470 nonzeros Presolve removed 1433 rows and 2 columns Presolve time: 0.19s Presolved: 5191 rows, 2860 columns, 19041 nonzeros Variable types: 0 continuous, 2860 integer (2860 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 3.000000e+00, 5169 iterations, 0.77 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 56 52.00000 3.00000 94.2% - 2s H 0 0 39.0000000 3.00000 92.3% - 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 0 261 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 237 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 97 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 144 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 144 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 103 4.00000 3.00000 25.0% - 20s 0 2 3.00000 0 103 4.00000 3.00000 25.0% - 22s 4 4 3.00000 1 132 4.00000 3.00000 25.0% 536 28s 5 5 3.00000 1 107 4.00000 3.00000 25.0% 429 31s 7 6 3.00000 1 109 4.00000 3.00000 25.0% 306 35s 9 8 3.00000 1 66 4.00000 3.00000 25.0% 238 42s 10 8 3.00000 1 72 4.00000 3.00000 25.0% 214 46s 13 12 3.00000 10 108 4.00000 3.00000 25.0% 8275 54s 14 13 3.00000 10 76 4.00000 3.00000 25.0% 7722 56s 16 14 3.00000 11 99 4.00000 3.00000 25.0% 6852 61s 22 10 3.00000 12 70 4.00000 3.00000 25.0% 5198 65s Cutting planes: Zero half: 5 Explored 27 nodes (216917 simplex iterations) in 65.97 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%