Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:48:48 2012 Optimize a model with 15870 rows, 4830 columns and 52164 nonzeros Presolve time: 0.13s Presolved: 15870 rows, 4830 columns, 52346 nonzeros Variable types: 0 continuous, 4830 integer (4830 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 2.000000e+00, 4094 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 138 46.00000 2.00000 95.7% - 0s H 0 0 15.0000000 2.00000 86.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 26s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 34s 0 0 2.00000 0 138 5.00000 2.00000 60.0% - 42s 0 2 2.00000 0 138 5.00000 2.00000 60.0% - 60s 1 3 3.00000 1 581 5.00000 2.00000 60.0% 40716 70s 2 4 3.00000 1 858 5.00000 3.00000 40.0% 32567 79s 3 5 3.00000 2 775 5.00000 3.00000 40.0% 22704 80s 7 7 3.20000 5 346 5.00000 3.00000 40.0% 12438 86s 8 8 3.25000 5 486 5.00000 3.00000 40.0% 12494 90s * 53 8 13 4.0000000 3.00000 25.0% 2284 94s 58 5 3.00000 3 147 4.00000 3.00000 25.0% 2141 95s 67 4 cutoff 4 4.00000 3.00000 25.0% 2182 100s 72 1 cutoff 4 4.00000 3.00000 25.0% 2313 106s Cutting planes: Clique: 121 Explored 76 nodes (287904 simplex iterations) in 107.06 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%