Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:58:09 2012 Optimize a model with 12805 rows, 4290 columns and 42445 nonzeros Presolve time: 0.10s Presolved: 12805 rows, 4290 columns, 42652 nonzeros Variable types: 0 continuous, 4290 integer (4290 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 2.000000e+00, 4385 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 0 130 37.00000 2.00000 94.6% - 1s H 0 0 11.0000000 2.00000 81.8% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 16s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 22s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 28s 0 0 2.00000 0 130 5.00000 2.00000 60.0% - 32s H 0 0 4.0000000 2.00000 50.0% - 44s 0 2 2.00000 0 130 4.00000 2.00000 50.0% - 54s 1 3 2.50000 1 166 4.00000 2.00000 50.0% 20545 57s 2 4 3.00000 1 619 4.00000 2.50000 37.5% 18396 65s 41 5 cutoff 7 4.00000 3.00000 25.0% 1478 70s 49 3 cutoff 6 4.00000 3.00000 25.0% 1608 75s 67 3 cutoff 5 4.00000 3.00000 25.0% 1432 80s 73 1 cutoff 5 4.00000 3.00000 25.0% 1600 85s 87 1 cutoff 6 4.00000 3.00000 25.0% 1523 90s Cutting planes: Clique: 152 Zero half: 3 Explored 89 nodes (218749 simplex iterations) in 91.03 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%