Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:31:16 2012 Optimize a model with 13887 rows, 4160 columns and 45502 nonzeros Presolve removed 3 rows and 66 columns Presolve time: 0.41s Presolved: 13884 rows, 4094 columns, 45004 nonzeros Variable types: 0 continuous, 4094 integer (4094 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 3035 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 64.00000 2.00000 96.9% - 0s H 0 0 62.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 2554 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 2372 5.00000 2.66667 46.7% - 3s 0 0 2.66667 0 2368 5.00000 2.66667 46.7% - 4s 0 0 2.66667 0 1018 5.00000 2.66667 46.7% - 5s H 0 0 4.0000000 2.66667 33.3% - 6s 0 0 2.66667 0 3236 4.00000 2.66667 33.3% - 6s 0 0 2.66667 0 233 4.00000 2.66667 33.3% - 16s 0 0 2.67391 0 3522 4.00000 2.67391 33.2% - 28s 0 0 2.67391 0 3623 4.00000 2.67391 33.2% - 29s 0 0 2.67391 0 3538 4.00000 2.67391 33.2% - 38s 0 0 2.67391 0 3604 4.00000 2.67391 33.2% - 44s 0 0 2.67391 0 3642 4.00000 2.67391 33.2% - 53s 0 0 2.67391 0 3570 4.00000 2.67391 33.2% - 60s 0 0 2.67391 0 3561 4.00000 2.67391 33.2% - 67s 0 0 2.67391 0 3681 4.00000 2.67391 33.2% - 75s 0 0 2.67391 0 3603 4.00000 2.67391 33.2% - 86s 0 0 2.67391 0 3391 4.00000 2.67391 33.2% - 98s 0 0 2.67391 0 3325 4.00000 2.67391 33.2% - 112s 0 0 2.67391 0 3105 4.00000 2.67391 33.2% - 122s 0 0 2.67391 0 3442 4.00000 2.67391 33.2% - 128s 0 0 2.67391 0 3442 4.00000 2.67391 33.2% - 135s 0 1 3.00000 0 3442 4.00000 3.00000 25.0% - 165s Cutting planes: Clique: 140 Zero half: 19 Explored 4 nodes (344593 simplex iterations) in 168.50 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%