Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:40:05 2012 Optimize a model with 12710 rows, 3906 columns and 41788 nonzeros Presolve time: 0.10s Presolved: 12710 rows, 3906 columns, 41991 nonzeros Variable types: 0 continuous, 3906 integer (3906 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 4562 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 41.00000 2.00000 95.1% - 1s H 0 0 14.0000000 2.00000 85.7% - 1s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 16s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 21s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 28s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 32s 0 2 2.00000 0 124 5.00000 2.00000 60.0% - 44s 1 3 3.00000 1 438 5.00000 2.00000 60.0% 37393 57s 2 4 3.00000 1 561 5.00000 3.00000 40.0% 27000 63s 8 6 3.00000 3 116 5.00000 3.00000 40.0% 7221 65s * 39 8 31 4.0000000 3.00000 25.0% 1647 67s 46 7 cutoff 4 4.00000 3.00000 25.0% 1581 70s 51 6 cutoff 7 4.00000 3.00000 25.0% 1822 75s 62 5 cutoff 5 4.00000 3.00000 25.0% 1780 80s Cutting planes: Clique: 126 Explored 72 nodes (195616 simplex iterations) in 83.78 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%