Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:18:13 2013 Optimize a model with 20700 rows, 45100 columns and 130050 nonzeros Presolve removed 150 rows and 100 columns Presolve time: 0.46s Presolved: 20550 rows, 45000 columns, 109900 nonzeros Variable types: 35050 continuous, 9950 integer (9950 binary) Root relaxation: objective 2.252562e+05, 16043 iterations, 0.83 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 225256.157 0 1 - 225256.157 - - 1s 0 0 225487.357 0 3 - 225487.357 - - 2s 0 0 225494.938 0 2 - 225494.938 - - 2s 0 0 225495.017 0 2 - 225495.017 - - 2s 0 0 225496.177 0 2 - 225496.177 - - 2s 0 0 225498.928 0 2 - 225498.928 - - 3s 0 0 225498.928 0 2 - 225498.928 - - 3s 0 0 225499.167 0 2 - 225499.167 - - 3s 0 0 225499.167 0 2 - 225499.167 - - 3s 0 2 225506.293 0 2 - 225506.293 - - 5s 64 66 226811.644 64 2 - 225615.988 - 53.3 10s 152 154 227076.251 152 1 - 225615.988 - 50.8 15s 229 231 227323.864 226 2 - 225615.988 - 55.1 20s 304 306 227535.745 291 2 - 225615.988 - 60.5 25s H 312 166 227570.66049 225615.988 0.86% 60.4 25s H 312 166 227569.98143 225615.988 0.86% 60.4 25s H 366 89 227104.95367 225654.436 0.64% 58.5 29s 375 100 226369.630 41 4 227104.954 225654.436 0.64% 57.9 30s H 382 64 226544.98139 225654.436 0.39% 57.5 30s H 447 112 226537.14897 225697.786 0.37% 53.7 32s 526 170 225769.985 5 3 226537.149 225712.485 0.36% 49.0 35s H 567 63 225954.53104 225714.543 0.11% 46.9 35s H 571 66 225951.12974 225714.543 0.10% 46.7 35s * 578 70 17 225947.62802 225714.543 0.10% 47.0 35s * 659 64 10 225915.15199 225753.693 0.07% 43.5 37s 834 18 225880.035 8 1 225915.152 225880.035 0.02% 39.5 40s Cutting planes: Gomory: 1 Flow cover: 13 Explored 853 nodes (49836 simplex iterations) in 40.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.259151519913e+05, best bound 2.258940255177e+05, gap 0.0094%