Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:17:07 2012 Optimize a model with 4549 rows, 702 columns and 14220 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 4573 rows, 700 columns, 22063 nonzeros Variable types: 0 continuous, 700 integer (700 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.181818e+00, 5121 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4.18182 0 428 26.00000 4.18182 83.9% - 0s H 0 0 23.0000000 4.18182 81.8% - 0s 0 0 6.00000 0 84 23.00000 6.00000 73.9% - 1s H 0 0 22.0000000 6.00000 72.7% - 1s H 0 0 21.0000000 6.00000 71.4% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 16 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 68 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 16 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 25 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 39 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 14 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 18 7.00000 6.00000 14.3% - 1s 0 2 6.00000 0 18 7.00000 6.00000 14.3% - 1s Cutting planes: Clique: 2 Zero half: 18 Explored 12 nodes (12473 simplex iterations) in 1.74 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%