Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:51:44 2012 Optimize a model with 904 rows, 192 columns and 1808 nonzeros Presolve removed 200 rows and 0 columns Presolve time: 0.01s Presolved: 704 rows, 192 columns, 1542 nonzeros Variable types: 0 continuous, 192 integer (192 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.595000e+01, 433 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 75.95000 0 180 51.00000 75.95000 48.9% - 0s H 0 0 52.0000000 75.95000 46.1% - 0s 0 0 73.97192 0 189 52.00000 73.97192 42.3% - 0s H 0 0 54.0000000 73.97192 37.0% - 0s 0 0 72.92718 0 190 54.00000 72.92718 35.1% - 0s 0 0 72.43497 0 191 54.00000 72.43497 34.1% - 0s H 0 0 55.0000000 72.43497 31.7% - 0s 0 0 72.05090 0 192 55.00000 72.05090 31.0% - 0s 0 0 71.86068 0 191 55.00000 71.86068 30.7% - 0s H 0 0 57.0000000 71.86068 26.1% - 0s 0 0 71.75116 0 191 57.00000 71.75116 25.9% - 0s 0 0 71.64980 0 190 57.00000 71.64980 25.7% - 0s 0 0 71.59043 0 191 57.00000 71.59043 25.6% - 0s 0 0 71.54477 0 191 57.00000 71.54477 25.5% - 0s 0 0 71.51860 0 191 57.00000 71.51860 25.5% - 0s 0 0 71.51860 0 191 57.00000 71.51860 25.5% - 0s H 0 0 58.0000000 71.51860 23.3% - 0s 0 2 71.51734 0 191 58.00000 71.51734 23.3% - 0s * 21 21 15 59.0000000 71.31595 20.9% 70.9 0s * 83 47 18 60.0000000 71.12924 18.5% 48.3 0s 610 301 68.69508 8 191 60.00000 68.88586 14.8% 48.8 5s 1978 886 65.98520 23 156 60.00000 67.98380 13.3% 51.4 10s 4222 2095 61.33333 36 129 60.00000 66.63736 11.1% 43.2 15s H 7015 2906 61.0000000 65.88235 8.00% 39.4 19s 7186 2965 62.00000 40 118 61.00000 65.83333 7.92% 39.4 20s 10351 3629 62.77778 31 133 61.00000 65.17073 6.84% 37.3 25s 14372 4046 62.79545 39 134 61.00000 64.50909 5.75% 35.5 30s 18473 3868 cutoff 39 61.00000 63.95652 4.85% 34.2 35s 22024 3207 cutoff 35 61.00000 63.46154 4.04% 33.6 40s 27808 108 cutoff 46 61.00000 62.00000 1.64% 31.4 45s Cutting planes: Gomory: 5 Zero half: 75 Explored 27927 nodes (877023 simplex iterations) in 45.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.100000000000e+01, best bound 6.100000000000e+01, gap 0.0%