Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:51:37 2013 Optimize a model with 1300 rows, 31800 columns and 95650 nonzeros Presolve removed 50 rows and 1450 columns Presolve time: 0.17s Presolved: 1250 rows, 30350 columns, 90650 nonzeros Variable types: 30050 continuous, 300 integer (300 binary) Root relaxation: objective 2.198499e+05, 2195 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 6 - 219849.939 - - 0s H 0 0 224928.14129 219849.939 2.26% - 0s 0 0 219865.830 0 6 224928.141 219865.830 2.25% - 0s 0 0 219867.185 0 6 224928.141 219867.185 2.25% - 0s 0 0 219869.437 0 6 224928.141 219869.437 2.25% - 0s 0 0 219872.267 0 6 224928.141 219872.267 2.25% - 1s 0 0 219874.245 0 6 224928.141 219874.245 2.25% - 1s 0 0 219874.245 0 6 224928.141 219874.245 2.25% - 1s 0 0 219874.245 0 6 224928.141 219874.245 2.25% - 1s 0 2 219877.853 0 6 224928.141 219877.853 2.25% - 1s * 44 35 42 222622.35999 220306.336 1.04% 32.8 3s * 146 85 27 222516.57931 220628.588 0.85% 24.2 4s 155 82 222443.028 15 6 222516.579 220796.038 0.77% 25.7 5s * 188 89 37 222430.64982 220910.063 0.68% 26.2 5s * 208 84 34 222352.30964 220920.973 0.64% 25.8 5s * 228 27 25 222024.82244 220950.499 0.48% 30.4 6s * 243 30 11 221990.70522 220999.008 0.45% 31.2 6s * 245 30 11 221990.67135 220999.008 0.45% 31.0 6s Cutting planes: Flow cover: 7 Explored 304 nodes (12023 simplex iterations) in 7.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219906713538e+05, best bound 2.219731104739e+05, gap 0.0079%