Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:46:53 2012 Optimize a model with 8475 rows, 2756 columns and 27922 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.16s Presolved: 8525 rows, 2754 columns, 30300 nonzeros Variable types: 0 continuous, 2754 integer (2754 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 2.000000e+00, 1993 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 104 51.00000 2.00000 96.1% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 3.00000 0 1622 5.00000 3.00000 40.0% - 1s 0 0 3.00000 0 1710 5.00000 3.00000 40.0% - 2s 0 0 3.00000 0 109 5.00000 3.00000 40.0% - 5s 0 0 3.01010 0 1623 5.00000 3.01010 39.8% - 8s 0 0 3.01010 0 1707 5.00000 3.01010 39.8% - 8s 0 0 3.01010 0 1717 5.00000 3.01010 39.8% - 11s 0 0 3.01010 0 1769 5.00000 3.01010 39.8% - 13s 0 0 3.01010 0 1667 5.00000 3.01010 39.8% - 16s 0 0 3.01010 0 1893 5.00000 3.01010 39.8% - 19s 0 0 3.01010 0 1801 5.00000 3.01010 39.8% - 22s 0 0 3.01010 0 1826 5.00000 3.01010 39.8% - 25s 0 0 3.01010 0 1548 5.00000 3.01010 39.8% - 28s 0 2 3.50000 0 1548 5.00000 3.50000 30.0% - 33s * 18 3 13 4.0000000 4.00000 0.0% 708 33s Cutting planes: Clique: 31 Zero half: 6 Explored 19 nodes (163894 simplex iterations) in 33.69 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%