Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:37:47 2012 Optimize a model with 986 rows, 191 columns and 1972 nonzeros Presolve removed 235 rows and 0 columns Presolve time: 0.01s Presolved: 751 rows, 191 columns, 1676 nonzeros Variable types: 0 continuous, 191 integer (191 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.310000e+01, 452 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.10000 0 182 52.00000 73.10000 40.6% - 0s 0 0 71.29289 0 187 52.00000 71.29289 37.1% - 0s H 0 0 54.0000000 71.29289 32.0% - 0s 0 0 71.01484 0 188 54.00000 71.01484 31.5% - 0s 0 0 70.46998 0 187 54.00000 70.46998 30.5% - 0s 0 0 70.13447 0 187 54.00000 70.13447 29.9% - 0s 0 0 69.70409 0 187 54.00000 69.70409 29.1% - 0s 0 0 69.60308 0 187 54.00000 69.60308 28.9% - 0s 0 0 69.52464 0 189 54.00000 69.52464 28.7% - 0s 0 0 69.41722 0 188 54.00000 69.41722 28.6% - 0s 0 0 69.17834 0 188 54.00000 69.17834 28.1% - 0s 0 0 69.10347 0 188 54.00000 69.10347 28.0% - 0s 0 0 68.98437 0 190 54.00000 68.98437 27.7% - 0s 0 0 68.84745 0 189 54.00000 68.84745 27.5% - 0s 0 0 68.73387 0 190 54.00000 68.73387 27.3% - 0s 0 0 68.61158 0 190 54.00000 68.61158 27.1% - 0s 0 0 68.58086 0 189 54.00000 68.58086 27.0% - 0s 0 0 68.54316 0 190 54.00000 68.54316 26.9% - 0s 0 0 68.54316 0 190 54.00000 68.54316 26.9% - 0s 0 2 68.53947 0 189 54.00000 68.53947 26.9% - 0s H 131 67 56.0000000 67.84177 21.1% 56.8 0s * 169 67 18 58.0000000 67.45543 16.3% 54.6 0s 607 262 59.91667 15 188 58.00000 66.11477 14.0% 58.1 5s 618 269 61.72727 9 188 58.00000 66.11477 14.0% 57.1 10s 1731 723 63.16822 25 147 58.00000 65.46591 12.9% 57.1 15s 3517 1691 60.68852 29 135 58.00000 64.40800 11.0% 49.8 20s 6109 2858 60.83333 25 138 58.00000 63.49894 9.48% 44.3 25s 8879 3804 cutoff 25 58.00000 62.92308 8.49% 41.3 30s 12149 4644 60.65000 23 129 58.00000 62.41837 7.62% 39.1 35s 14879 5139 cutoff 29 58.00000 62.06000 7.00% 37.7 40s *18876 4096 34 59.0000000 61.66667 4.52% 36.3 44s 18878 4096 61.62500 32 127 59.00000 61.66667 4.52% 36.3 46s 21549 3083 cutoff 20 59.00000 61.00000 3.39% 35.9 50s Cutting planes: Gomory: 7 Zero half: 78 Explored 25371 nodes (846664 simplex iterations) in 52.81 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%