Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:05:49 2012 Optimize a model with 7129 rows, 992 columns and 22225 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.09s Presolved: 7127 rows, 990 columns, 25323 nonzeros Variable types: 0 continuous, 990 integer (990 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 3.468354e+00, 6376 iterations, 0.43 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46835 0 859 31.00000 3.46835 88.8% - 1s H 0 0 30.0000000 3.46835 88.4% - 1s 0 0 6.00000 0 122 30.00000 6.00000 80.0% - 1s H 0 0 29.0000000 6.00000 79.3% - 1s H 0 0 9.0000000 6.00000 33.3% - 1s 0 0 6.00000 0 140 9.00000 6.00000 33.3% - 2s H 0 0 8.0000000 6.00000 25.0% - 2s 0 0 6.00000 0 109 8.00000 6.00000 25.0% - 3s H 0 0 7.0000000 6.00000 14.3% - 3s 0 0 6.00000 0 103 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 51 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 111 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 127 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 51 7.00000 6.00000 14.3% - 3s 0 0 6.00000 0 109 7.00000 6.00000 14.3% - 4s 0 0 6.00000 0 109 7.00000 6.00000 14.3% - 4s 0 2 6.00000 0 109 7.00000 6.00000 14.3% - 4s Cutting planes: Clique: 7 Zero half: 15 Explored 18 nodes (25027 simplex iterations) in 4.48 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%