Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:37:21 2012 Optimize a model with 11570 rows, 17030 columns and 51220 nonzeros Presolve removed 34 rows and 4420 columns Presolve time: 0.20s Presolved: 11536 rows, 12610 columns, 46800 nonzeros Variable types: 0 continuous, 12610 integer (12610 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 2.000000e+00, 15749 iterations, 1.98 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 128 48.00000 2.00000 95.8% - 4s H 0 0 3.0000000 2.00000 33.3% - 4s 0 0 2.00000 0 235 3.00000 2.00000 33.3% - 8s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 16s 0 0 2.00000 0 226 3.00000 2.00000 33.3% - 23s 0 0 2.00000 0 128 3.00000 2.00000 33.3% - 29s 0 0 2.00000 0 226 3.00000 2.00000 33.3% - 37s 0 0 2.00000 0 226 3.00000 2.00000 33.3% - 44s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 54s 0 0 2.00000 0 259 3.00000 2.00000 33.3% - 58s 0 2 2.00000 0 259 3.00000 2.00000 33.3% - 67s 4 4 2.00000 1 128 3.00000 2.00000 33.3% 5574 74s 5 5 2.00000 1 259 3.00000 2.00000 33.3% 4459 86s 6 6 2.00000 1 132 3.00000 2.00000 33.3% 3716 96s 7 6 2.00000 1 128 3.00000 2.00000 33.3% 3185 108s 8 7 2.00000 1 486 3.00000 2.00000 33.3% 2787 135s 9 8 2.00000 1 128 3.00000 2.00000 33.3% 2477 155s 10 8 2.00000 1 128 3.00000 2.00000 33.3% 2229 173s 11 9 2.00000 1 128 3.00000 2.00000 33.3% 2027 188s 12 10 2.00000 1 128 3.00000 2.00000 33.3% 1858 192s 14 11 infeasible 15 3.00000 2.00000 33.3% 22721 197s Cutting planes: Gomory: 8 Zero half: 11 Explored 16 nodes (542527 simplex iterations) in 198.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%