Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:00:18 2012 Optimize a model with 19199 rows, 5402 columns and 62707 nonzeros Presolve time: 0.15s Presolved: 19199 rows, 5402 columns, 62791 nonzeros Variable types: 0 continuous, 5402 integer (5402 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 2.000000e+00, 10321 iterations, 2.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 46.00000 2.00000 95.7% - 2s H 0 0 14.0000000 2.00000 85.7% - 2s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 6s 0 2 2.00000 0 146 5.00000 2.00000 60.0% - 15s 1 3 3.00000 1 901 5.00000 2.00090 60.0% 28654 28s 2 4 3.00000 1 494 5.00000 3.00000 40.0% 25444 38s 5 3 3.00000 2 435 5.00000 3.00000 40.0% 10889 40s 27 16 4.00000 14 129 5.00000 3.00000 40.0% 3028 45s * 42 5 25 4.0000000 3.00000 25.0% 2029 45s 50 2 3.00000 4 138 4.00000 3.00000 25.0% 1919 50s 53 1 cutoff 6 4.00000 3.00000 25.0% 2457 59s 55 1 cutoff 6 4.00000 3.00000 25.0% 2672 63s 56 0 cutoff 6 4.00000 4.00000 0.0% 2948 68s Cutting planes: Clique: 27 Explored 57 nodes (182072 simplex iterations) in 68.27 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%