Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:41:51 2013 Optimize a model with 39184 rows, 38564 columns and 153884 nonzeros Presolve removed 62 rows and 0 columns Presolve time: 0.17s Presolved: 39122 rows, 38564 columns, 153822 nonzeros Variable types: 38502 continuous, 62 integer (62 binary) Root relaxation: objective 4.777787e+04, 4234 iterations, 1.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47777.8681 0 39 - 47777.8681 - - 1s H 0 0 63947.000000 47777.8681 25.3% - 1s H 0 0 58874.000000 47777.8681 18.8% - 2s H 0 0 58351.000000 47777.8681 18.1% - 2s 0 0 53795.6194 0 19 58351.0000 53795.6194 7.81% - 4s 0 0 56189.4760 0 8 58351.0000 56189.4760 3.70% - 6s 0 0 56497.0506 0 2 58351.0000 56497.0506 3.18% - 7s H 0 0 57273.113208 56497.0506 1.36% - 7s H 0 0 56941.000000 56497.0506 0.78% - 7s 0 2 56497.3047 0 2 56941.0000 56497.3047 0.78% - 8s H 2 2 56693.000000 56515.0769 0.31% 68.5 8s H 10 4 56692.500000 56515.8804 0.31% 111 9s H 12 6 56692.000000 56515.8804 0.31% 100 9s 16 8 56628.0400 15 1 56692.0000 56515.8804 0.31% 105 10s H 27 9 56643.000000 56534.7895 0.19% 100 10s * 30 11 10 56636.000000 56534.7895 0.18% 100 10s * 44 12 7 56612.000000 56560.2478 0.09% 88.0 11s Cutting planes: Implied bound: 57 Explored 58 nodes (12815 simplex iterations) in 11.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.661200000000e+04, best bound 5.660666666667e+04, gap 0.0094%