Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:54:58 2012 Optimize a model with 13869 rows, 4556 columns and 45895 nonzeros Presolve time: 0.11s Presolved: 13869 rows, 4556 columns, 46066 nonzeros Variable types: 0 continuous, 4556 integer (4556 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 4695 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 43.00000 2.00000 95.3% - 1s H 0 0 14.0000000 2.00000 85.7% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 7s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 23s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 30s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 35s 0 2 2.00000 0 134 5.00000 2.00000 60.0% - 55s 1 3 2.50000 1 186 5.00000 2.00000 60.0% 23504 60s 2 4 2.50000 1 127 5.00000 2.50000 50.0% 19260 67s 27 27 4.00000 20 72 5.00000 2.50000 50.0% 1789 74s * 30 11 21 4.0000000 2.50000 37.5% 1616 74s 35 7 3.00000 2 124 4.00000 2.50000 37.5% 1519 75s 60 10 2.60000 3 210 4.00000 2.50000 37.5% 1127 80s 110 8 infeasible 4 4.00000 3.00000 25.0% 817 85s Cutting planes: Gomory: 1 Clique: 113 Explored 147 nodes (185322 simplex iterations) in 86.70 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%