Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:38:21 2013 Optimize a model with 11600 rows, 120300 columns and 270500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.52s Presolved: 11500 rows, 120200 columns, 260400 nonzeros Variable types: 110200 continuous, 10000 integer (10000 binary) Root relaxation: objective 7.672886e+05, 11591 iterations, 0.87 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 767288.564 0 6 - 767288.564 - - 1s 0 0 767331.572 0 4 - 767331.572 - - 3s 0 0 767331.573 0 4 - 767331.573 - - 3s 0 0 767331.573 0 4 - 767331.573 - - 3s 0 0 767331.573 0 4 - 767331.573 - - 4s 0 0 767331.573 0 4 - 767331.573 - - 4s 0 0 767331.573 0 4 - 767331.573 - - 5s 0 0 767331.573 0 4 - 767331.573 - - 6s H 0 0 781346.42761 767331.573 1.79% - 7s 0 2 767331.573 0 4 781346.428 767331.573 1.79% - 9s 3 5 767838.890 2 2 781346.428 767351.556 1.79% 501 10s 21 21 cutoff 11 781346.428 767812.496 1.73% 294 15s H 27 9 768372.76039 767812.496 0.07% 250 16s 107 5 768344.709 93 2 768372.760 767812.496 0.07% 65.3 20s * 115 7 99 768348.85148 767812.496 0.07% 61.7 20s Cutting planes: Implied bound: 41 Flow cover: 4 Explored 133 nodes (23642 simplex iterations) in 21.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.683488514786e+05, best bound 7.683488514786e+05, gap 0.0%