Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:55:11 2012 Optimize a model with 6820 rows, 992 columns and 21328 nonzeros Presolve time: 0.06s Presolved: 6820 rows, 992 columns, 27201 nonzeros Variable types: 0 continuous, 992 integer (992 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 2.000000e+00, 58 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 20.00000 2.00000 90.0% - 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% - 1s 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 7 9 5.14286 4 102 8.00000 3.00000 62.5% 1925 5s * 39 20 23 7.0000000 3.00000 57.1% 519 5s 133 46 3.66667 6 89 7.00000 3.51316 49.8% 349 10s 295 88 cutoff 13 7.00000 4.00000 42.9% 273 15s 362 113 6.00000 10 38 7.00000 4.02649 42.5% 269 20s 603 161 6.00000 10 90 7.00000 6.00000 14.3% 214 26s 609 167 6.00000 10 62 7.00000 6.00000 14.3% 245 30s 616 174 6.00000 22 101 7.00000 6.00000 14.3% 267 35s 627 177 6.00000 26 101 7.00000 6.00000 14.3% 270 40s 653 172 6.00000 24 122 7.00000 6.00000 14.3% 280 45s 686 174 infeasible 32 7.00000 6.00000 14.3% 285 50s 742 150 infeasible 29 7.00000 6.00000 14.3% 309 55s 801 129 6.00000 29 86 7.00000 6.00000 14.3% 333 60s 880 94 infeasible 28 7.00000 6.00000 14.3% 343 65s 946 74 infeasible 30 7.00000 6.00000 14.3% 357 70s 1045 40 infeasible 30 7.00000 6.00000 14.3% 361 75s Explored 1090 nodes (407171 simplex iterations) in 78.38 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%