Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:09:32 2012 Optimize a model with 13229 rows, 4032 columns and 43405 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.37s Presolved: 13227 rows, 4030 columns, 42985 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 2.000000e+00, 3063 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 62.00000 2.00000 96.8% - 0s H 0 0 60.0000000 2.00000 96.7% - 0s H 0 0 6.0000000 2.00000 66.7% - 1s 0 0 2.66667 0 168 6.00000 2.66667 55.6% - 2s H 0 0 5.0000000 2.66667 46.7% - 2s 0 0 2.67033 0 3400 5.00000 2.67033 46.6% - 2s 0 0 2.67033 0 3398 5.00000 2.67033 46.6% - 3s 0 0 2.67033 0 3404 5.00000 2.67033 46.6% - 4s 0 0 2.67033 0 3009 5.00000 2.67033 46.6% - 6s 0 0 2.67033 0 2924 5.00000 2.67033 46.6% - 7s 0 0 2.67033 0 2866 5.00000 2.67033 46.6% - 9s 0 0 2.67033 0 3015 5.00000 2.67033 46.6% - 10s 0 0 2.67033 0 3011 5.00000 2.67033 46.6% - 12s 0 0 2.67033 0 3032 5.00000 2.67033 46.6% - 13s 0 0 2.67033 0 3049 5.00000 2.67033 46.6% - 15s 0 0 2.67033 0 3216 5.00000 2.67033 46.6% - 17s 0 0 2.67033 0 3216 5.00000 2.67033 46.6% - 17s 0 2 2.80000 0 3216 5.00000 2.80000 44.0% - 24s 5 3 4.00000 2 107 5.00000 3.00000 40.0% 1209 25s * 21 4 15 4.0000000 3.00000 25.0% 397 25s Cutting planes: Clique: 74 Zero half: 4 Explored 26 nodes (62351 simplex iterations) in 25.47 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%