Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:47:16 2012 Optimize a model with 880 rows, 184 columns and 1760 nonzeros Presolve removed 193 rows and 0 columns Presolve time: 0.00s Presolved: 687 rows, 184 columns, 1508 nonzeros Variable types: 0 continuous, 184 integer (184 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 7.180000e+01, 411 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.80000 0 163 53.00000 71.80000 35.5% - 0s 0 0 71.29878 0 182 53.00000 71.29878 34.5% - 0s 0 0 69.74116 0 182 53.00000 69.74116 31.6% - 0s 0 0 68.75695 0 183 53.00000 68.75695 29.7% - 0s 0 0 68.46431 0 182 53.00000 68.46431 29.2% - 0s 0 0 68.32376 0 179 53.00000 68.32376 28.9% - 0s 0 0 68.04328 0 181 53.00000 68.04328 28.4% - 0s 0 0 67.77257 0 180 53.00000 67.77257 27.9% - 0s 0 0 67.68321 0 182 53.00000 67.68321 27.7% - 0s 0 0 67.54360 0 180 53.00000 67.54360 27.4% - 0s 0 0 67.37572 0 183 53.00000 67.37572 27.1% - 0s H 0 0 54.0000000 67.37572 24.8% - 0s 0 0 67.32787 0 182 54.00000 67.32787 24.7% - 0s 0 0 67.21989 0 182 54.00000 67.21989 24.5% - 0s 0 0 67.20773 0 182 54.00000 67.20773 24.5% - 0s 0 0 67.20773 0 182 54.00000 67.20773 24.5% - 0s 0 2 67.20715 0 182 54.00000 67.20715 24.5% - 0s H 80 52 55.0000000 66.89443 21.6% 58.7 0s H 168 87 56.0000000 65.62496 17.2% 56.1 0s H 363 174 57.0000000 64.87678 13.8% 51.8 1s 607 301 59.50000 13 181 57.00000 64.47987 13.1% 51.4 5s 732 369 60.94949 26 134 57.00000 64.47987 13.1% 60.5 10s 2189 920 59.71429 29 134 57.00000 63.30769 11.1% 50.9 15s 4223 1785 60.09091 24 124 57.00000 62.16279 9.06% 44.2 20s * 5492 1683 30 58.0000000 61.69717 6.37% 42.3 22s 6331 1706 59.49620 19 126 58.00000 61.33333 5.75% 41.6 25s 8457 1564 59.69672 36 135 58.00000 60.60241 4.49% 40.0 30s 11049 518 cutoff 23 58.00000 59.50000 2.59% 37.8 35s Cutting planes: Gomory: 6 Zero half: 204 Explored 11667 nodes (429483 simplex iterations) in 35.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%