Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:04:37 2012 Optimize a model with 14661 rows, 6642 columns and 50301 nonzeros Presolve removed 1863 rows and 0 columns Presolve time: 0.32s Presolved: 12798 rows, 6642 columns, 46008 nonzeros Variable types: 0 continuous, 6642 integer (6642 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 3.000000e+00, 12691 iterations, 2.53 seconds Total elapsed time = 5.91s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 158 56.00000 3.00000 94.6% - 9s H 0 0 4.0000000 3.00000 25.0% - 9s 0 0 3.00000 0 143 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 367 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 138 4.00000 3.00000 25.0% - 19s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 21s 0 0 3.00000 0 98 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 128 4.00000 3.00000 25.0% - 27s 0 0 3.00000 0 202 4.00000 3.00000 25.0% - 39s 0 0 3.00000 0 236 4.00000 3.00000 25.0% - 47s 0 0 3.00000 0 153 4.00000 3.00000 25.0% - 51s 0 2 3.00000 0 153 4.00000 3.00000 25.0% - 56s 4 4 3.00000 1 76 4.00000 3.00000 25.0% 1784 66s 6 6 3.00000 1 140 4.00000 3.00000 25.0% 1189 81s 7 6 3.00000 1 132 4.00000 3.00000 25.0% 1019 92s 8 7 3.00000 1 166 4.00000 3.00000 25.0% 892 108s 11 9 infeasible 15 4.00000 3.00000 25.0% 15795 112s 13 10 3.00000 16 126 4.00000 3.00000 25.0% 13585 116s Cutting planes: Gomory: 5 Zero half: 13 Explored 17 nodes (406670 simplex iterations) in 117.71 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%