Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:18:05 2012 Optimize a model with 7181 rows, 2970 columns and 24244 nonzeros Presolve removed 1190 rows and 2 columns Presolve time: 0.20s Presolved: 6045 rows, 2968 columns, 24238 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 3.000000e+00, 5200 iterations, 0.79 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 113 54.00000 3.00000 94.4% - 3s H 0 0 15.0000000 3.00000 80.0% - 3s H 0 0 13.0000000 3.00000 76.9% - 3s H 0 0 5.0000000 3.00000 40.0% - 3s 0 0 3.00000 0 493 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 3.00000 0 124 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 117 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 56 4.00000 3.00000 25.0% - 17s 0 0 3.00000 0 101 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 120 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 107 4.00000 3.00000 25.0% - 25s 0 0 3.00000 0 167 4.00000 3.00000 25.0% - 28s 0 0 3.00000 0 106 4.00000 3.00000 25.0% - 30s 0 2 3.00000 0 106 4.00000 3.00000 25.0% - 31s 4 4 3.00000 1 1127 4.00000 3.00000 25.0% 737 41s 6 6 3.00000 1 106 4.00000 3.00000 25.0% 492 46s 8 7 3.00000 1 132 4.00000 3.00000 25.0% 369 51s 9 8 3.00000 1 103 4.00000 3.00000 25.0% 328 55s 10 8 3.00000 1 135 4.00000 3.00000 25.0% 295 63s 12 10 3.00000 1 112 4.00000 3.00000 25.0% 246 65s 13 11 3.00000 11 135 4.00000 3.00000 25.0% 8311 71s 14 11 3.00000 11 144 4.00000 3.00000 25.0% 8003 76s 18 10 3.00000 12 108 4.00000 3.00000 25.0% 6345 83s Cutting planes: Gomory: 4 Zero half: 13 Explored 21 nodes (246814 simplex iterations) in 83.39 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%