Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:57:37 2012 Optimize a model with 18761 rows, 5402 columns and 61393 nonzeros Presolve time: 0.15s Presolved: 18761 rows, 5402 columns, 61484 nonzeros Variable types: 0 continuous, 5402 integer (5402 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 4499 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 41.00000 2.00000 95.1% - 1s H 0 0 14.0000000 2.00000 85.7% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 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% - 13s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 24s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 36s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 43s 0 0 2.00000 0 146 5.00000 2.00000 60.0% - 51s 0 2 2.00000 0 146 5.00000 2.00000 60.0% - 79s 1 3 3.00000 1 621 5.00000 2.00000 60.0% 54080 93s 2 4 3.00000 1 588 5.00000 3.00000 40.0% 44584 106s 5 5 3.00000 2 252 5.00000 3.00000 40.0% 19680 110s 9 7 3.16667 4 289 5.00000 3.00000 40.0% 14133 117s 27 21 4.00000 20 104 5.00000 3.00000 40.0% 4950 120s * 34 6 27 4.0000000 3.00000 25.0% 3933 120s 38 4 cutoff 3 4.00000 3.00000 25.0% 4423 132s 39 3 cutoff 3 4.00000 3.00000 25.0% 5091 143s 42 2 cutoff 4 4.00000 3.00000 25.0% 5595 154s 43 1 cutoff 4 4.00000 3.00000 25.0% 5961 160s Cutting planes: Clique: 149 Explored 45 nodes (392226 simplex iterations) in 160.72 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%