Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:03:04 2013 Optimize a model with 68224 rows, 67404 columns and 269124 nonzeros Presolve removed 82 rows and 0 columns Presolve time: 0.31s Presolved: 68142 rows, 67404 columns, 269042 nonzeros Variable types: 67322 continuous, 82 integer (82 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 8478 6.7527331e+04 6.218879e+03 0.000000e+00 5s 9561 6.7797979e+04 0.000000e+00 0.000000e+00 7s Root relaxation: objective 6.779798e+04, 9561 iterations, 7.49 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67797.9792 0 63 - 67797.9792 - - 8s H 0 0 110154.00000 67797.9792 38.5% - 11s H 0 0 90926.000000 67797.9792 25.4% - 25s 0 0 81223.4726 0 18 90926.0000 81223.4726 10.7% - 35s 0 0 85013.4350 0 9 90926.0000 85013.4350 6.50% - 39s 0 0 85849.8390 0 5 90926.0000 85849.8390 5.58% - 40s H 0 0 89891.690757 85849.8390 4.50% - 40s H 0 0 88829.000000 85849.8390 3.35% - 40s H 0 0 87345.000000 85849.8390 1.71% - 40s 0 2 85852.8483 0 5 87345.0000 85852.8483 1.71% - 42s H 2 2 87221.364542 86042.7169 1.35% 171 42s H 3 3 87127.137405 86116.6653 1.16% 229 42s * 5 5 3 86311.000000 86138.5791 0.20% 413 43s * 9 4 5 86309.000000 86138.5791 0.20% 309 44s 21 1 cutoff 2 86309.0000 86200.4936 0.13% 221 45s Cutting planes: Implied bound: 80 Explored 23 nodes (23802 simplex iterations) in 45.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.630900000000e+04, best bound 8.630892881356e+04, gap 0.0001%