Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:58:56 2012 Optimize a model with 11396 rows, 5550 columns and 39442 nonzeros Presolve removed 2073 rows and 74 columns Presolve time: 0.25s Presolved: 9323 rows, 5476 columns, 34558 nonzeros Variable types: 0 continuous, 5476 integer (5476 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 3.000000e+00, 11306 iterations, 2.20 seconds Total elapsed time = 5.05s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 123 44.00000 3.00000 93.2% - 5s H 0 0 5.0000000 3.00000 40.0% - 5s 0 0 3.00000 0 256 5.00000 3.00000 40.0% - 6s H 0 0 4.0000000 3.00000 25.0% - 6s 0 0 3.00000 0 130 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 125 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 26s 0 0 3.00000 0 182 4.00000 3.00000 25.0% - 32s 0 0 3.00000 0 209 4.00000 3.00000 25.0% - 38s 0 0 3.00000 0 153 4.00000 3.00000 25.0% - 41s 0 2 3.00000 0 153 4.00000 3.00000 25.0% - 45s 4 4 3.00000 1 116 4.00000 3.00000 25.0% 1362 52s 5 5 3.00000 1 107 4.00000 3.00000 25.0% 1090 55s 8 7 3.00000 1 84 4.00000 3.00000 25.0% 681 60s 10 8 3.00000 1 129 4.00000 3.00000 25.0% 545 68s 11 9 3.00000 1 187 4.00000 3.00000 25.0% 495 76s 14 11 infeasible 12 4.00000 3.00000 25.0% 12541 80s Cutting planes: Zero half: 8 Explored 20 nodes (374350 simplex iterations) in 82.57 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%