Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:46:19 2012 Optimize a model with 6510 rows, 930 columns and 20340 nonzeros Presolve time: 0.06s Presolved: 6510 rows, 930 columns, 26898 nonzeros Variable types: 0 continuous, 930 integer (930 binary) Found heuristic solution: objective 17.0000000 Root relaxation: objective 2.000000e+00, 3592 iterations, 0.24 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 11.0000000 2.00000 81.8% - 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% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 0s 0 0 2.00000 0 60 8.00000 2.00000 75.0% - 0s 0 2 2.00000 0 60 8.00000 2.00000 75.0% - 0s * 86 34 30 7.0000000 3.00000 57.1% 288 4s 88 34 5.50000 2 85 7.00000 3.75000 46.4% 308 5s 297 86 6.00000 8 63 7.00000 4.27381 38.9% 229 10s 558 159 cutoff 15 7.00000 5.00000 28.6% 199 15s Explored 602 nodes (123837 simplex iterations) in 16.33 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%