Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:51:42 2012 Optimize a model with 6449 rows, 930 columns and 20128 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.09s Presolved: 6477 rows, 928 columns, 25631 nonzeros Variable types: 0 continuous, 928 integer (928 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.600000e+00, 4524 iterations, 0.28 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.60000 0 661 30.00000 3.60000 88.0% - 1s H 0 0 27.0000000 3.60000 86.7% - 1s 0 0 6.00000 0 133 27.00000 6.00000 77.8% - 1s H 0 0 26.0000000 6.00000 76.9% - 1s H 0 0 25.0000000 6.00000 76.0% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 55 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 40 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 88 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 75 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 64 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 50 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 64 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 77 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 50 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 64 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 64 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 64 7.00000 6.00000 14.3% - 2s Cutting planes: Clique: 8 Zero half: 4 Explored 7 nodes (19218 simplex iterations) in 2.83 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%