Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:25:53 2012 Optimize a model with 14688 rows, 4692 columns and 48484 nonzeros Presolve time: 0.12s Presolved: 14688 rows, 4692 columns, 48654 nonzeros Variable types: 0 continuous, 4692 integer (4692 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 4938 iterations, 0.22 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 43.00000 2.00000 95.3% - 1s H 0 0 15.0000000 2.00000 86.7% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 136 5.00000 2.00000 60.0% - 16s H 0 0 4.0000000 2.00000 50.0% - 17s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 25s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 31s 0 0 2.00000 0 136 4.00000 2.00000 50.0% - 37s 0 2 2.00000 0 136 4.00000 2.00000 50.0% - 69s 1 3 2.50000 1 181 4.00000 2.00000 50.0% 27594 74s 2 4 2.50000 1 601 4.00000 2.50000 37.5% 40109 99s 4 6 2.66667 3 178 4.00000 2.50000 37.5% 21233 101s 14 8 2.66667 2 182 4.00000 2.50000 37.5% 6953 106s 33 9 3.00000 3 122 4.00000 2.50000 37.5% 3387 110s 62 6 2.66667 3 738 4.00000 2.66667 33.3% 2234 117s 83 3 infeasible 4 4.00000 3.00000 25.0% 1771 120s Cutting planes: Clique: 143 Explored 101 nodes (251825 simplex iterations) in 120.48 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%