Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:27:43 2012 Optimize a model with 9173 rows, 1122 columns and 28477 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 9171 rows, 1120 columns, 30136 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.462264e+00, 8561 iterations, 0.68 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46226 0 1004 33.00000 3.46226 89.5% - 1s 0 0 5.00000 0 99 33.00000 5.00000 84.8% - 2s H 0 0 28.0000000 5.00000 82.1% - 3s H 0 0 14.0000000 5.00000 64.3% - 3s 0 0 5.57143 0 868 14.00000 5.57143 60.2% - 3s H 0 0 12.0000000 5.57143 53.6% - 3s H 0 0 11.0000000 5.57143 49.4% - 3s 0 0 5.66667 0 81 11.00000 5.66667 48.5% - 4s 0 0 7.00000 0 89 11.00000 7.00000 36.4% - 5s H 0 0 10.0000000 7.00000 30.0% - 5s H 0 0 9.0000000 7.00000 22.2% - 5s 0 0 7.00000 0 227 9.00000 7.00000 22.2% - 5s H 0 0 8.0000000 7.00000 12.5% - 5s 0 0 7.00000 0 93 8.00000 7.00000 12.5% - 6s 0 0 7.00000 0 108 8.00000 7.00000 12.5% - 6s 0 0 7.00000 0 100 8.00000 7.00000 12.5% - 7s 0 0 7.00000 0 109 8.00000 7.00000 12.5% - 7s 0 0 7.00000 0 104 8.00000 7.00000 12.5% - 8s 0 0 7.00000 0 82 8.00000 7.00000 12.5% - 9s 0 0 7.00000 0 71 8.00000 7.00000 12.5% - 9s 0 0 7.00000 0 111 8.00000 7.00000 12.5% - 10s 0 0 7.00000 0 101 8.00000 7.00000 12.5% - 11s 0 0 7.00000 0 72 8.00000 7.00000 12.5% - 11s 0 0 7.00000 0 123 8.00000 7.00000 12.5% - 12s 0 0 7.00000 0 123 8.00000 7.00000 12.5% - 13s 0 2 7.00000 0 123 8.00000 7.00000 12.5% - 14s 2 3 7.00000 0 81 8.00000 7.00000 12.5% 1000 15s 9 8 7.00000 0 94 8.00000 7.00000 12.5% 222 20s 12 10 7.00000 0 134 8.00000 7.00000 12.5% 167 25s 15 13 7.00000 16 223 8.00000 7.00000 12.5% 2821 30s 119 9 7.00000 24 106 8.00000 7.00000 12.5% 534 35s 318 8 infeasible 31 8.00000 7.00000 12.5% 317 40s 501 7 infeasible 24 8.00000 7.00000 12.5% 277 45s Cutting planes: Gomory: 15 Clique: 131 Zero half: 59 Explored 539 nodes (227590 simplex iterations) in 47.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%