Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:50:48 2012 Optimize a model with 6449 rows, 930 columns and 20128 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.08s Presolved: 6447 rows, 928 columns, 23012 nonzeros Variable types: 0 continuous, 928 integer (928 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.473684e+00, 6379 iterations, 0.42 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.47368 0 790 30.00000 3.47368 88.4% - 1s 0 0 6.00000 0 123 30.00000 6.00000 80.0% - 1s H 0 0 28.0000000 6.00000 78.6% - 1s H 0 0 18.0000000 6.00000 66.7% - 1s 0 0 6.00000 0 127 18.00000 6.00000 66.7% - 1s H 0 0 13.0000000 6.00000 53.8% - 1s H 0 0 8.0000000 6.00000 25.0% - 1s 0 0 6.00000 0 90 8.00000 6.00000 25.0% - 2s H 0 0 7.0000000 6.00000 14.3% - 2s 0 0 6.00000 0 85 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 57 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 124 7.00000 6.00000 14.3% - 2s 0 0 6.00000 0 71 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 90 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 81 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 99 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 108 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 107 7.00000 6.00000 14.3% - 3s 0 2 6.00000 0 100 7.00000 6.00000 14.3% - 3s Cutting planes: Clique: 24 Zero half: 13 Explored 7 nodes (23372 simplex iterations) in 3.83 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%