Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:36:25 2012 Optimize a model with 5713 rows, 870 columns and 17893 nonzeros Presolve time: 0.05s Presolved: 5713 rows, 870 columns, 23689 nonzeros Variable types: 0 continuous, 870 integer (870 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 2.000000e+00, 1085 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 58 17.00000 2.00000 88.2% - 0s H 0 0 11.0000000 2.00000 81.8% - 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% - 1s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 1s 0 0 2.00000 0 58 8.00000 2.00000 75.0% - 1s 0 2 2.00000 0 58 8.00000 2.00000 75.0% - 3s H 27 19 7.0000000 3.00000 57.1% 397 4s 40 20 4.00000 3 75 7.00000 3.00000 57.1% 419 5s 153 69 5.00000 4 54 7.00000 4.00000 42.9% 336 10s 305 117 5.00000 11 68 7.00000 4.00000 42.9% 234 15s 603 195 6.00000 13 14 7.00000 6.00000 14.3% 180 20s 612 204 6.00000 30 99 7.00000 6.00000 14.3% 209 25s 636 210 6.00000 35 54 7.00000 6.00000 14.3% 218 30s 704 192 infeasible 37 7.00000 6.00000 14.3% 247 35s 751 173 infeasible 39 7.00000 6.00000 14.3% 299 40s 813 160 6.00000 39 26 7.00000 6.00000 14.3% 323 45s 879 144 6.00000 37 109 7.00000 6.00000 14.3% 359 50s 956 112 infeasible 37 7.00000 6.00000 14.3% 370 55s 1035 92 6.00000 36 99 7.00000 6.00000 14.3% 391 60s 1091 72 infeasible 39 7.00000 6.00000 14.3% 438 65s 1206 30 6.00000 37 77 7.00000 6.00000 14.3% 434 70s 1305 12 infeasible 36 7.00000 6.00000 14.3% 438 75s Explored 1334 nodes (601022 simplex iterations) in 76.84 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%