Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:27:19 2012 Optimize a model with 11162 rows, 3782 columns and 36964 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.29s Presolved: 11221 rows, 3780 columns, 40319 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2739 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 61.00000 2.00000 96.7% - 0s H 0 0 57.0000000 2.00000 96.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.66667 0 173 4.00000 2.66667 33.3% - 1s 0 0 2.67045 0 3445 4.00000 2.67045 33.2% - 2s 0 0 2.67045 0 3444 4.00000 2.67045 33.2% - 3s 0 0 2.67045 0 3444 4.00000 2.67045 33.2% - 4s 0 0 2.67045 0 3157 4.00000 2.67045 33.2% - 5s 0 0 2.67045 0 3020 4.00000 2.67045 33.2% - 7s 0 0 2.67045 0 3071 4.00000 2.67045 33.2% - 8s 0 0 2.67045 0 3050 4.00000 2.67045 33.2% - 9s 0 0 2.67045 0 3052 4.00000 2.67045 33.2% - 10s 0 0 2.67045 0 3048 4.00000 2.67045 33.2% - 11s 0 0 2.67045 0 3044 4.00000 2.67045 33.2% - 12s 0 0 2.67045 0 3044 4.00000 2.67045 33.2% - 14s 0 2 2.80000 0 3044 4.00000 2.80000 30.0% - 18s 8 0 cutoff 1 4.00000 4.00000 0.0% 1012 20s Cutting planes: Clique: 89 Zero half: 5 Explored 9 nodes (44121 simplex iterations) in 20.20 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%