Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:27:18 2012 Optimize a model with 8546 rows, 1122 columns and 26596 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 8544 rows, 1120 columns, 28116 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.362637e+00, 7415 iterations, 0.58 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.36264 0 1018 33.00000 3.36264 89.8% - 1s H 0 0 29.0000000 3.36264 88.4% - 1s 0 0 4.00000 0 124 29.00000 4.00000 86.2% - 1s H 0 0 27.0000000 4.00000 85.2% - 1s H 0 0 10.0000000 4.00000 60.0% - 1s 0 0 4.66667 0 329 10.00000 4.66667 53.3% - 1s 0 0 4.66667 0 202 10.00000 4.66667 53.3% - 2s H 0 0 9.0000000 4.66667 48.1% - 2s 0 0 4.72258 0 928 9.00000 4.72258 47.5% - 2s H 0 0 8.0000000 4.72258 41.0% - 2s 0 0 4.74468 0 917 8.00000 4.74468 40.7% - 2s 0 0 4.75168 0 911 8.00000 4.75168 40.6% - 3s 0 0 4.75168 0 921 8.00000 4.75168 40.6% - 3s 0 0 4.75168 0 802 8.00000 4.75168 40.6% - 4s 0 2 6.00000 0 802 8.00000 6.00000 25.0% - 6s H 54 13 7.0000000 6.00000 14.3% 175 8s 82 15 infeasible 8 7.00000 6.00000 14.3% 186 10s Cutting planes: Gomory: 25 Clique: 265 Zero half: 15 Explored 143 nodes (48703 simplex iterations) in 13.80 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%