Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:14:20 2013 Optimize a model with 572 rows, 27092 columns and 54132 nonzeros Presolve time: 0.04s Presolved: 572 rows, 27092 columns, 54132 nonzeros Variable types: 27040 continuous, 52 integer (52 binary) Root relaxation: objective 5.423880e+04, 1041 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54238.8039 0 8 - 54238.8039 - - 0s H 0 0 56510.000000 54238.8039 4.02% - 0s H 0 0 55087.000000 54238.8039 1.54% - 0s 0 0 54584.8479 0 7 55087.0000 54584.8479 0.91% - 0s 0 0 54630.9708 0 6 55087.0000 54630.9708 0.83% - 0s 0 0 54645.4862 0 5 55087.0000 54645.4862 0.80% - 0s 0 0 54654.4205 0 6 55087.0000 54654.4205 0.79% - 0s 0 0 54655.1104 0 5 55087.0000 54655.1104 0.78% - 0s 0 0 54655.1104 0 5 55087.0000 54655.1104 0.78% - 0s 0 0 54655.1104 0 5 55087.0000 54655.1104 0.78% - 0s 0 0 54698.6631 0 4 55087.0000 54698.6631 0.70% - 0s 0 0 54698.6631 0 7 55087.0000 54698.6631 0.70% - 0s 0 0 54698.6631 0 6 55087.0000 54698.6631 0.70% - 0s 0 0 54698.6631 0 5 55087.0000 54698.6631 0.70% - 0s 0 0 54703.1040 0 4 55087.0000 54703.1040 0.70% - 0s 0 0 54708.8527 0 5 55087.0000 54708.8527 0.69% - 0s 0 0 54709.7582 0 4 55087.0000 54709.7582 0.68% - 0s 0 0 54709.7582 0 4 55087.0000 54709.7582 0.68% - 0s 0 0 54709.7582 0 4 55087.0000 54709.7582 0.68% - 0s 0 2 54714.5671 0 4 55087.0000 54714.5671 0.68% - 1s H 11 8 55039.000000 54780.0512 0.47% 29.7 1s H 12 8 55019.000000 54780.0512 0.43% 34.4 1s * 13 7 12 54911.000000 54780.0512 0.24% 32.3 1s Cutting planes: Implied bound: 111 Flow cover: 3 Explored 45 nodes (4036 simplex iterations) in 1.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.491100000000e+04, best bound 5.491100000000e+04, gap 0.0%