Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:04:49 2012 Optimize a model with 6863 rows, 2352 columns and 22702 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.11s Presolved: 6909 rows, 2350 columns, 24720 nonzeros Variable types: 0 continuous, 2350 integer (2350 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 2.000000e+00, 1659 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 96 48.00000 2.00000 95.8% - 0s H 0 0 46.0000000 2.00000 95.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 225 5.00000 2.66667 46.7% - 0s 0 0 2.68148 0 2066 5.00000 2.68148 46.4% - 1s 0 0 2.68148 0 2066 5.00000 2.68148 46.4% - 1s 0 0 2.68148 0 1783 5.00000 2.68148 46.4% - 3s 0 0 2.68148 0 1744 5.00000 2.68148 46.4% - 4s 0 0 2.68148 0 1872 5.00000 2.68148 46.4% - 5s 0 0 2.68148 0 1871 5.00000 2.68148 46.4% - 6s 0 0 2.68148 0 1855 5.00000 2.68148 46.4% - 7s 0 0 2.68148 0 1832 5.00000 2.68148 46.4% - 9s 0 0 2.68148 0 1760 5.00000 2.68148 46.4% - 10s 0 0 2.68148 0 1830 5.00000 2.68148 46.4% - 11s 0 0 2.68148 0 1741 5.00000 2.68148 46.4% - 12s 0 0 2.68148 0 1830 5.00000 2.68148 46.4% - 13s 0 0 2.68148 0 1830 5.00000 2.68148 46.4% - 14s 0 2 3.00000 0 1830 5.00000 3.00000 40.0% - 17s * 14 3 7 4.0000000 4.00000 0.0% 508 18s Cutting planes: Clique: 105 Zero half: 10 Explored 15 nodes (63562 simplex iterations) in 18.71 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%