Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:15:24 2012 Optimize a model with 15164 rows, 4692 columns and 49912 nonzeros Presolve time: 0.12s Presolved: 15164 rows, 4692 columns, 50109 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 2.000000e+00, 5317 iterations, 0.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 40.00000 2.00000 95.0% - 3s H 0 0 19.0000000 2.00000 89.5% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 13s H 0 0 4.0000000 2.00000 50.0% - 13s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 20s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 28s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 34s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 40s 0 2 2.00000 0 136 4.00000 2.00000 50.0% - 57s 1 3 3.00000 1 647 4.00000 2.00000 50.0% 40292 66s 2 4 3.00000 1 796 4.00000 3.00000 25.0% 32271 74s 3 3 infeasible 2 4.00000 3.00000 25.0% 22184 75s 8 2 cutoff 4 4.00000 3.00000 25.0% 11176 81s 21 1 cutoff 5 4.00000 3.00000 25.0% 4800 85s 26 2 cutoff 5 4.00000 3.00000 25.0% 4815 91s 29 3 3.00000 5 132 4.00000 3.00000 25.0% 4692 95s Cutting planes: Clique: 194 Explored 33 nodes (256783 simplex iterations) in 98.18 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%