Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:07:58 2012 Optimize a model with 773 rows, 172 columns and 1546 nonzeros Presolve removed 143 rows and 0 columns Presolve time: 0.00s Presolved: 630 rows, 172 columns, 1360 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.150000e+01, 223 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.50000 0 135 52.00000 71.50000 37.5% - 0s 0 0 69.50000 0 141 52.00000 69.50000 33.7% - 0s 0 0 68.73214 0 167 52.00000 68.73214 32.2% - 0s H 0 0 54.0000000 68.73214 27.3% - 0s 0 0 67.60000 0 166 54.00000 67.60000 25.2% - 0s 0 0 67.08370 0 168 54.00000 67.08370 24.2% - 0s 0 0 66.75000 0 168 54.00000 66.75000 23.6% - 0s 0 0 66.05473 0 167 54.00000 66.05473 22.3% - 0s 0 0 65.92751 0 170 54.00000 65.92751 22.1% - 0s 0 0 65.84692 0 171 54.00000 65.84692 21.9% - 0s 0 0 65.73656 0 171 54.00000 65.73656 21.7% - 0s 0 0 65.58237 0 171 54.00000 65.58237 21.4% - 0s 0 0 65.51856 0 170 54.00000 65.51856 21.3% - 0s 0 0 65.43023 0 171 54.00000 65.43023 21.2% - 0s 0 0 65.38058 0 169 54.00000 65.38058 21.1% - 0s 0 0 65.34341 0 171 54.00000 65.34341 21.0% - 0s 0 0 65.34341 0 168 54.00000 65.34341 21.0% - 0s H 0 0 56.0000000 65.34341 16.7% - 0s H 0 0 57.0000000 65.34341 14.6% - 0s H 0 0 58.0000000 65.34341 12.7% - 0s 0 2 65.34180 0 168 58.00000 65.34180 12.7% - 0s 613 186 62.17221 9 169 58.00000 62.68999 8.09% 47.9 5s 1171 229 60.10294 34 145 58.00000 62.10515 7.08% 54.3 10s * 1329 174 34 59.0000000 61.78183 4.71% 53.1 10s Cutting planes: Gomory: 6 Zero half: 242 Mod-K: 1 Explored 1664 nodes (84280 simplex iterations) in 11.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%