Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:38:48 2012 Optimize a model with 5771 rows, 870 columns and 18067 nonzeros Presolve time: 0.05s Presolved: 5771 rows, 870 columns, 25269 nonzeros Variable types: 0 continuous, 870 integer (870 binary) Found heuristic solution: objective 18.0000000 Root relaxation: objective 2.000000e+00, 1334 iterations, 0.06 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 13.0000000 2.00000 84.6% - 0s H 0 0 10.0000000 2.00000 80.0% - 0s 0 0 2.00000 0 58 10.00000 2.00000 80.0% - 0s H 0 0 9.0000000 2.00000 77.8% - 0s 0 0 2.00000 0 58 9.00000 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% - 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% - 2s * 31 18 22 7.0000000 3.00000 57.1% 276 4s 49 26 6.00000 9 42 7.00000 3.00000 57.1% 323 5s 220 55 cutoff 13 7.00000 5.00000 28.6% 264 10s 439 46 infeasible 7 7.00000 6.00000 14.3% 221 15s 565 26 6.00000 12 42 7.00000 6.00000 14.3% 231 20s 689 13 cutoff 13 7.00000 6.00000 14.3% 241 25s Cutting planes: Clique: 306 Zero half: 4 Explored 753 nodes (187928 simplex iterations) in 28.55 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%