Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:05:51 2012 Optimize a model with 889 rows, 186 columns and 1778 nonzeros Presolve removed 183 rows and 0 columns Presolve time: 0.01s Presolved: 706 rows, 186 columns, 1527 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 7.400000e+01, 438 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74.00000 0 171 50.00000 74.00000 48.0% - 0s H 0 0 51.0000000 74.00000 45.1% - 0s 0 0 72.83214 0 186 51.00000 72.83214 42.8% - 0s H 0 0 53.0000000 72.83214 37.4% - 0s 0 0 71.96863 0 185 53.00000 71.96863 35.8% - 0s 0 0 71.14103 0 185 53.00000 71.14103 34.2% - 0s 0 0 70.29435 0 184 53.00000 70.29435 32.6% - 0s 0 0 69.89853 0 181 53.00000 69.89853 31.9% - 0s 0 0 69.60592 0 184 53.00000 69.60592 31.3% - 0s 0 0 69.50919 0 185 53.00000 69.50919 31.1% - 0s 0 0 69.43031 0 184 53.00000 69.43031 31.0% - 0s 0 0 69.28384 0 186 53.00000 69.28384 30.7% - 0s 0 0 69.20807 0 185 53.00000 69.20807 30.6% - 0s 0 0 69.10782 0 186 53.00000 69.10782 30.4% - 0s 0 0 68.99013 0 185 53.00000 68.99013 30.2% - 0s H 0 0 54.0000000 68.99013 27.8% - 0s 0 0 68.91242 0 186 54.00000 68.91242 27.6% - 0s 0 0 68.88746 0 186 54.00000 68.88746 27.6% - 0s 0 0 68.88746 0 185 54.00000 68.88746 27.6% - 0s H 0 0 55.0000000 68.88746 25.2% - 0s 0 2 68.88746 0 184 55.00000 68.88746 25.2% - 0s * 60 45 20 56.0000000 68.71452 22.7% 59.2 0s H 81 53 57.0000000 68.70960 20.5% 60.4 0s H 442 213 58.0000000 66.80587 15.2% 54.1 1s 610 309 62.50000 15 186 58.00000 66.16530 14.1% 51.4 5s 620 316 65.37288 8 186 58.00000 66.16530 14.1% 50.6 10s 1242 532 59.57143 29 133 58.00000 65.88082 13.6% 61.5 15s 2314 982 62.46154 23 145 58.00000 64.44633 11.1% 55.1 20s 3679 1609 59.59807 26 134 58.00000 63.56712 9.60% 51.3 25s 5195 2146 61.50000 27 135 58.00000 63.03488 8.68% 48.3 30s 6577 2596 61.19444 31 138 58.00000 62.68496 8.08% 46.4 35s 8419 3071 59.76000 28 126 58.00000 62.25000 7.33% 44.7 40s 9926 3411 60.20436 38 143 58.00000 62.00000 6.90% 43.4 45s 12396 3777 59.94444 32 135 58.00000 61.62500 6.25% 41.9 50s 13615 3871 cutoff 39 58.00000 61.49393 6.02% 41.2 55s 16007 3959 59.97642 32 139 58.00000 61.21429 5.54% 39.9 60s 18842 3837 59.22581 39 125 58.00000 60.88889 4.98% 38.9 65s 21629 3332 cutoff 34 58.00000 60.50000 4.31% 38.2 70s 24564 2332 cutoff 42 58.00000 60.10000 3.62% 37.5 75s Cutting planes: Gomory: 6 Zero half: 250 Explored 28425 nodes (1015828 simplex iterations) in 79.82 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%