Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:20:47 2012 Optimize a model with 15844 rows, 4692 columns and 51952 nonzeros Presolve time: 0.12s Presolved: 15844 rows, 4692 columns, 52106 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 2.000000e+00, 6671 iterations, 0.73 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 44.00000 2.00000 95.5% - 3s H 0 0 12.0000000 2.00000 83.3% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 29s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 40s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 48s 0 2 2.00000 0 136 5.00000 2.00000 60.0% - 76s 1 3 3.00000 1 811 5.00000 2.00000 60.0% 37785 86s 2 4 3.00000 1 870 5.00000 3.00000 40.0% 27648 93s 5 5 3.00000 2 333 5.00000 3.00000 40.0% 12624 95s 27 13 3.25000 10 173 5.00000 3.00000 40.0% 3156 103s * 42 12 21 4.0000000 3.00000 25.0% 2092 103s 46 8 cutoff 5 4.00000 3.00000 25.0% 2160 106s 51 5 cutoff 7 4.00000 3.00000 25.0% 2554 112s 53 5 3.00000 4 124 4.00000 3.00000 25.0% 2693 115s 57 5 3.00000 4 124 4.00000 3.00000 25.0% 2865 120s 63 5 cutoff 8 4.00000 3.00000 25.0% 3063 126s 68 4 cutoff 8 4.00000 3.00000 25.0% 3327 132s 74 8 3.00000 8 126 4.00000 3.00000 25.0% 3354 138s 75 7 cutoff 9 4.00000 3.00000 25.0% 3484 141s 77 5 cutoff 8 4.00000 3.00000 25.0% 3696 146s 80 6 cutoff 9 4.00000 3.00000 25.0% 3850 152s 81 5 cutoff 9 4.00000 3.00000 25.0% 3945 155s 83 5 3.00000 5 122 4.00000 3.00000 25.0% 4094 161s 86 2 cutoff 6 4.00000 3.00000 25.0% 4378 170s 91 5 3.00000 4 126 4.00000 3.00000 25.0% 4263 175s 96 4 cutoff 7 4.00000 3.00000 25.0% 4339 181s Cutting planes: Gomory: 1 Clique: 132 Explored 111 nodes (530590 simplex iterations) in 182.36 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%