Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:53:46 2012 Optimize a model with 11752 rows, 5402 columns and 40294 nonzeros Presolve removed 1608 rows and 2 columns Presolve time: 0.51s Presolved: 10217 rows, 5400 columns, 41549 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 3.000000e+00, 8038 iterations, 1.72 seconds Total elapsed time = 5.40s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 874 73.00000 3.00000 95.9% - 5s H 0 0 68.0000000 3.00000 95.6% - 6s H 0 0 4.0000000 3.00000 25.0% - 6s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 130 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 149 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 161 4.00000 3.00000 25.0% - 22s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 30s 0 0 3.00000 0 85 4.00000 3.00000 25.0% - 34s 0 0 3.00000 0 92 4.00000 3.00000 25.0% - 40s 0 0 3.00000 0 92 4.00000 3.00000 25.0% - 41s 0 2 3.00000 0 92 4.00000 3.00000 25.0% - 45s 2 3 3.00000 1 92 4.00000 3.00000 25.0% 2682 50s 4 4 3.00000 1 172 4.00000 3.00000 25.0% 1341 58s 5 5 3.00000 1 76 4.00000 3.00000 25.0% 1073 66s 6 6 3.00000 1 123 4.00000 3.00000 25.0% 894 73s 7 6 3.00000 1 141 4.00000 3.00000 25.0% 766 84s 8 7 3.00000 1 141 4.00000 3.00000 25.0% 670 88s 10 10 3.00000 11 108 4.00000 3.00000 25.0% 12491 97s 14 12 3.00000 13 102 4.00000 3.00000 25.0% 9083 100s 22 7 3.00000 15 1729 4.00000 3.00000 25.0% 6759 173s Cutting planes: Gomory: 3 Clique: 2 Zero half: 19 Explored 34 nodes (297646 simplex iterations) in 174.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%