Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:43:41 2012 Optimize a model with 6089 rows, 870 columns and 18993 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 6087 rows, 868 columns, 23324 nonzeros Variable types: 0 continuous, 868 integer (868 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.600000e+00, 8004 iterations, 0.50 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.60000 0 672 29.00000 3.60000 87.6% - 1s 0 0 6.00000 0 111 29.00000 6.00000 79.3% - 1s H 0 0 13.0000000 6.00000 53.8% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 71 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 59 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 81 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 44 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 49 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 42 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 89 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 61 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 38 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 38 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 38 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 38 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 33 Zero half: 31 Explored 151 nodes (29919 simplex iterations) in 3.47 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%