Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:55:01 2012 Optimize a model with 699 rows, 167 columns and 1398 nonzeros Presolve removed 172 rows and 3 columns Presolve time: 0.00s Presolved: 527 rows, 164 columns, 1148 nonzeros Variable types: 0 continuous, 164 integer (164 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 6.650000e+01, 232 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.50000 0 121 51.00000 66.50000 30.4% - 0s 0 0 64.69118 0 153 51.00000 64.69118 26.8% - 0s 0 0 63.80645 0 152 51.00000 63.80645 25.1% - 0s H 0 0 52.0000000 63.80645 22.7% - 0s 0 0 63.74790 0 156 52.00000 63.74790 22.6% - 0s 0 0 63.26774 0 154 52.00000 63.26774 21.7% - 0s 0 0 62.90592 0 155 52.00000 62.90592 21.0% - 0s H 0 0 53.0000000 62.90592 18.7% - 0s 0 0 62.65078 0 156 53.00000 62.65078 18.2% - 0s 0 0 62.50311 0 157 53.00000 62.50311 17.9% - 0s 0 0 62.34498 0 157 53.00000 62.34498 17.6% - 0s 0 0 62.18495 0 159 53.00000 62.18495 17.3% - 0s 0 0 62.16557 0 160 53.00000 62.16557 17.3% - 0s 0 0 62.16557 0 160 53.00000 62.16557 17.3% - 0s 0 2 62.16497 0 160 53.00000 62.16497 17.3% - 0s * 22 21 17 54.0000000 62.16497 15.1% 36.7 0s * 35 25 9 55.0000000 62.07813 12.9% 39.6 0s * 91 37 14 56.0000000 61.47529 9.78% 42.9 0s 613 173 58.60833 8 161 56.00000 59.85460 6.88% 35.6 5s * 1229 111 28 57.0000000 59.00000 3.51% 41.3 7s Cutting planes: Gomory: 4 Zero half: 154 Explored 1393 nodes (56669 simplex iterations) in 7.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%