Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:38:16 2012 Optimize a model with 7589 rows, 3080 columns and 25573 nonzeros Presolve removed 1707 rows and 2 columns Presolve time: 0.19s Presolved: 5937 rows, 3078 columns, 24369 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 3.000000e+00, 5325 iterations, 0.86 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 62 55.00000 3.00000 94.5% - 3s H 0 0 28.0000000 3.00000 89.3% - 3s H 0 0 18.0000000 3.00000 83.3% - 3s H 0 0 5.0000000 3.00000 40.0% - 3s 0 0 3.00000 0 628 5.00000 3.00000 40.0% - 4s H 0 0 4.0000000 3.00000 25.0% - 4s 0 0 3.00000 0 124 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 80 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 139 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 170 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 154 4.00000 3.00000 25.0% - 20s 0 2 3.00000 0 106 4.00000 3.00000 25.0% - 24s 2 3 3.00000 1 154 4.00000 3.00000 25.0% 1845 26s 4 4 3.00000 1 64 4.00000 3.00000 25.0% 922 31s 5 5 3.00000 1 78 4.00000 3.00000 25.0% 738 37s 6 6 3.00000 1 80 4.00000 3.00000 25.0% 615 40s 8 7 3.00000 1 127 4.00000 3.00000 25.0% 461 46s 9 8 3.00000 1 235 4.00000 3.00000 25.0% 410 55s 12 12 3.00000 11 126 4.00000 3.00000 25.0% 9492 66s 15 12 3.00000 12 92 4.00000 3.00000 25.0% 7727 71s Cutting planes: Gomory: 4 Zero half: 12 Explored 24 nodes (215710 simplex iterations) in 74.01 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%