Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:39:17 2012 Optimize a model with 5800 rows, 870 columns and 18154 nonzeros Presolve time: 0.06s Presolved: 5800 rows, 870 columns, 25213 nonzeros Variable types: 0 continuous, 870 integer (870 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 2.000000e+00, 3254 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 58 18.00000 2.00000 88.9% - 0s H 0 0 9.0000000 2.00000 77.8% - 0s 0 0 2.00000 0 58 9.00000 2.00000 77.8% - 0s H 0 0 8.0000000 2.00000 75.0% - 0s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 0s 0 2 2.00000 0 58 8.00000 2.00000 75.0% - 0s H 54 20 7.0000000 3.00000 57.1% 306 3s 87 33 infeasible 4 7.00000 3.00000 57.1% 345 5s 203 72 6.00000 4 116 7.00000 4.16667 40.5% 336 10s 397 110 5.18182 8 106 7.00000 5.00000 28.6% 271 15s 559 130 6.00000 10 68 7.00000 5.00000 28.6% 255 20s 612 148 6.00000 14 37 7.00000 6.00000 14.3% 257 25s 619 155 6.00000 24 102 7.00000 6.00000 14.3% 278 30s 641 149 6.00000 25 91 7.00000 6.00000 14.3% 283 35s 669 144 6.00000 30 77 7.00000 6.00000 14.3% 294 40s 727 123 infeasible 29 7.00000 6.00000 14.3% 303 45s 789 98 infeasible 29 7.00000 6.00000 14.3% 308 50s Explored 816 nodes (255478 simplex iterations) in 51.47 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%