Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:44:29 2012 Optimize a model with 6420 rows, 930 columns and 20070 nonzeros Presolve time: 0.06s Presolved: 6420 rows, 930 columns, 26051 nonzeros Variable types: 0 continuous, 930 integer (930 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 2.000000e+00, 1697 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 60 17.00000 2.00000 88.2% - 0s H 0 0 10.0000000 2.00000 80.0% - 0s H 0 0 9.0000000 2.00000 77.8% - 0s 0 0 2.00000 0 60 9.00000 2.00000 77.8% - 0s 0 0 2.00000 0 60 9.00000 2.00000 77.8% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 2s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 2s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 2s H 0 0 7.0000000 2.00000 71.4% - 3s 0 2 2.00000 0 60 7.00000 2.00000 71.4% - 4s 2 4 3.00000 1 58 7.00000 3.00000 57.1% 3393 5s 133 65 5.50000 6 97 7.00000 3.50000 50.0% 340 10s 306 120 4.05263 7 113 7.00000 4.00000 42.9% 281 15s 496 198 5.22222 21 111 7.00000 4.00000 42.9% 233 20s 552 214 4.50000 7 102 7.00000 4.00000 42.9% 246 25s 605 231 6.00000 19 81 7.00000 6.00000 14.3% 242 30s 614 240 6.00000 26 85 7.00000 6.00000 14.3% 295 35s 621 241 6.00000 28 153 7.00000 6.00000 14.3% 298 40s 653 234 infeasible 34 7.00000 6.00000 14.3% 303 45s 703 230 6.00000 35 89 7.00000 6.00000 14.3% 306 50s 749 210 6.00000 33 86 7.00000 6.00000 14.3% 318 55s 783 197 6.00000 33 98 7.00000 6.00000 14.3% 327 60s 842 168 6.00000 29 120 7.00000 6.00000 14.3% 331 65s Explored 894 nodes (307182 simplex iterations) in 68.83 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%