Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:23:59 2012 Optimize a model with 14027 rows, 6972 columns and 48721 nonzeros Presolve removed 1994 rows and 166 columns Presolve time: 0.32s Presolved: 12033 rows, 6806 columns, 43741 nonzeros Variable types: 0 continuous, 6806 integer (6806 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 3.000000e+00, 13223 iterations, 2.55 seconds Total elapsed time = 5.37s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 113 48.00000 3.00000 93.8% - 7s H 0 0 4.0000000 3.00000 25.0% - 7s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 26 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 70 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 115 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 142 4.00000 3.00000 25.0% - 27s 0 0 3.00000 0 208 4.00000 3.00000 25.0% - 33s 0 0 3.00000 0 206 4.00000 3.00000 25.0% - 36s 0 2 3.00000 0 206 4.00000 3.00000 25.0% - 46s 4 4 3.00000 1 114 4.00000 3.00000 25.0% 3118 57s 5 5 3.00000 1 130 4.00000 3.00000 25.0% 2494 63s 6 6 3.00000 1 127 4.00000 3.00000 25.0% 2078 68s 7 6 3.00000 1 121 4.00000 3.00000 25.0% 1782 73s 8 7 3.00000 1 211 4.00000 3.00000 25.0% 1559 84s 9 8 3.00000 1 240 4.00000 3.00000 25.0% 1386 105s 10 8 3.00000 1 227 4.00000 3.00000 25.0% 1247 111s 12 10 infeasible 11 4.00000 3.00000 25.0% 19495 120s 14 11 3.00000 12 155 4.00000 3.00000 25.0% 16882 125s 25 9 infeasible 17 4.00000 3.00000 25.0% 10022 130s 51 5 3.00000 17 101 4.00000 3.00000 25.0% 5436 135s Cutting planes: Gomory: 2 Zero half: 9 Explored 59 nodes (468098 simplex iterations) in 138.79 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%