Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:30 2013 Optimize a model with 300 rows, 6220 columns and 46170 nonzeros Presolve removed 10 rows and 1130 columns Presolve time: 0.07s Presolved: 290 rows, 5090 columns, 42170 nonzeros Variable types: 5010 continuous, 80 integer (80 binary) Root relaxation: objective 1.997658e+04, 145 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19976.5790 0 10 - 19976.5790 - - 0s 0 0 19977.1629 0 10 - 19977.1629 - - 0s 0 0 19990.9913 0 9 - 19990.9913 - - 0s 0 0 19990.9913 0 9 - 19990.9913 - - 0s 0 2 19991.7628 0 9 - 19991.7628 - - 0s * 24 18 21 20215.384004 20005.4451 1.04% 8.2 0s H 27 18 20202.499337 20005.4451 0.98% 7.4 0s * 45 21 15 20170.474931 20011.7946 0.79% 5.7 0s * 61 23 11 20168.962458 20015.9240 0.76% 4.7 0s * 72 17 9 20166.584944 20023.2013 0.71% 4.4 0s * 88 11 8 20163.101072 20129.9232 0.16% 4.0 0s * 99 6 11 20159.743458 20131.6533 0.14% 3.8 0s * 110 6 12 20159.222300 20145.6742 0.07% 3.7 0s * 111 5 11 20158.967754 20145.6742 0.07% 3.7 0s * 123 7 12 20158.556800 20154.2630 0.02% 3.5 0s Cutting planes: Flow cover: 1 Explored 129 nodes (866 simplex iterations) in 0.71 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.015855679969e+04, best bound 2.015674953512e+04, gap 0.0090%