Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:35:13 2012 Optimize a model with 5085 rows, 2070 columns and 17145 nonzeros Presolve removed 1170 rows and 0 columns Presolve time: 0.12s Presolved: 3915 rows, 2070 columns, 14400 nonzeros Variable types: 0 continuous, 2070 integer (2070 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.000000e+00, 3870 iterations, 0.31 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 52 26.00000 3.00000 88.5% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 197 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 105 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 122 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 102 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 78 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 81 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 79 4.00000 3.00000 25.0% - 10s 0 2 3.00000 0 78 4.00000 3.00000 25.0% - 11s 6 6 3.00000 1 87 4.00000 3.00000 25.0% 331 17s 8 7 3.00000 1 121 4.00000 3.00000 25.0% 248 20s 11 9 3.00000 1 135 4.00000 3.00000 25.0% 181 28s 13 10 3.00000 1 98 4.00000 3.00000 25.0% 153 30s Cutting planes: Gomory: 3 Clique: 2 Zero half: 6 Explored 17 nodes (179779 simplex iterations) in 32.16 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%