Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:51:57 2012 Optimize a model with 6975 rows, 992 columns and 21793 nonzeros Presolve time: 0.06s Presolved: 6975 rows, 992 columns, 27980 nonzeros Variable types: 0 continuous, 992 integer (992 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 2.000000e+00, 151 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 62 18.00000 2.00000 88.9% - 0s H 0 0 13.0000000 2.00000 84.6% - 0s H 0 0 9.0000000 2.00000 77.8% - 0s 0 0 2.00000 0 62 9.00000 2.00000 77.8% - 0s 0 0 2.00000 0 62 9.00000 2.00000 77.8% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 62 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 62 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 62 8.00000 2.00000 75.0% - 2s 0 0 2.00000 0 62 8.00000 2.00000 75.0% - 2s 0 2 2.00000 0 62 8.00000 2.00000 75.0% - 3s 2 4 3.00000 1 60 8.00000 3.00000 62.5% 4099 5s * 30 16 24 7.0000000 3.00000 57.1% 560 6s 151 71 4.00000 6 66 7.00000 4.00000 42.9% 329 10s 351 140 5.50000 14 81 7.00000 4.00000 42.9% 262 15s 540 197 6.00000 15 50 7.00000 4.00000 42.9% 227 20s 605 220 6.00000 18 118 7.00000 6.00000 14.3% 220 25s 612 226 6.00000 18 74 7.00000 6.00000 14.3% 244 30s 617 231 6.00000 23 86 7.00000 6.00000 14.3% 269 35s 638 223 6.00000 22 111 7.00000 6.00000 14.3% 274 40s 668 213 6.00000 24 86 7.00000 6.00000 14.3% 281 45s Explored 715 nodes (218177 simplex iterations) in 48.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%