Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:37:27 2012 Optimize a model with 14123 rows, 4422 columns and 46462 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.42s Presolved: 14187 rows, 4420 columns, 50390 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3125 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 0 132 66.00000 2.00000 97.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 4040 5.00000 2.66667 46.7% - 2s 0 0 2.67016 0 4139 5.00000 2.67016 46.6% - 4s 0 0 2.67016 0 4144 5.00000 2.67016 46.6% - 5s 0 0 2.67016 0 4023 5.00000 2.67016 46.6% - 12s 0 0 2.67016 0 3862 5.00000 2.67016 46.6% - 18s 0 0 2.67016 0 3885 5.00000 2.67016 46.6% - 23s 0 0 2.67016 0 3880 5.00000 2.67016 46.6% - 30s 0 0 2.67016 0 3867 5.00000 2.67016 46.6% - 35s 0 0 2.67016 0 3852 5.00000 2.67016 46.6% - 41s 0 0 2.67016 0 3843 5.00000 2.67016 46.6% - 48s 0 0 2.67016 0 3829 5.00000 2.67016 46.6% - 53s 0 0 2.67016 0 3933 5.00000 2.67016 46.6% - 58s 0 0 2.67016 0 3928 5.00000 2.67016 46.6% - 63s 0 0 2.67016 0 3894 5.00000 2.67016 46.6% - 68s 0 0 2.67016 0 3941 5.00000 2.67016 46.6% - 73s 0 0 2.67016 0 3883 5.00000 2.67016 46.6% - 79s 0 0 2.67016 0 3861 5.00000 2.67016 46.6% - 85s 0 0 2.67016 0 3802 5.00000 2.67016 46.6% - 92s 0 0 2.67016 0 3814 5.00000 2.67016 46.6% - 97s 0 0 2.67016 0 3814 5.00000 2.67016 46.6% - 100s 0 2 2.80000 0 3814 5.00000 2.80000 44.0% - 115s 18 10 4.00000 8 135 5.00000 3.00000 40.0% 1209 120s H 38 4 4.0000000 3.00000 25.0% 600 121s Cutting planes: Clique: 88 Zero half: 4 Explored 43 nodes (231940 simplex iterations) in 124.28 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%