Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:19:19 2013 Optimize a model with 858 rows, 60918 columns and 121758 nonzeros Presolve time: 0.09s Presolved: 858 rows, 60918 columns, 121758 nonzeros Variable types: 60840 continuous, 78 integer (78 binary) Root relaxation: objective 8.695469e+04, 2298 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 86954.6946 0 8 - 86954.6946 - - 0s H 0 0 91510.000000 86954.6946 4.98% - 0s 0 0 87570.1564 0 6 91510.0000 87570.1564 4.31% - 0s 0 0 87716.8251 0 7 91510.0000 87716.8251 4.15% - 0s H 0 0 89540.000000 87716.8251 2.04% - 0s 0 0 87730.0797 0 5 89540.0000 87730.0797 2.02% - 0s 0 0 87736.8881 0 5 89540.0000 87736.8881 2.01% - 0s H 0 0 89442.000000 87736.8881 1.91% - 0s 0 0 87740.9641 0 5 89442.0000 87740.9641 1.90% - 0s 0 0 87741.3766 0 5 89442.0000 87741.3766 1.90% - 1s H 0 0 89438.000000 87741.3766 1.90% - 1s 0 0 87742.6876 0 5 89438.0000 87742.6876 1.90% - 1s 0 0 87742.6876 0 8 89438.0000 87742.6876 1.90% - 1s 0 0 87742.6876 0 6 89438.0000 87742.6876 1.90% - 1s 0 0 87742.6876 0 7 89438.0000 87742.6876 1.90% - 1s 0 0 87742.6876 0 5 89438.0000 87742.6876 1.90% - 2s 0 0 87742.6876 0 5 89438.0000 87742.6876 1.90% - 2s 0 0 87742.6876 0 5 89438.0000 87742.6876 1.90% - 2s 0 0 87742.6876 0 5 89438.0000 87742.6876 1.90% - 2s 0 0 87742.6876 0 5 89438.0000 87742.6876 1.90% - 2s 0 2 87770.3415 0 5 89438.0000 87770.3415 1.86% - 2s H 8 8 88829.500000 88144.3252 0.77% 153 3s * 10 7 6 88479.000000 88144.3252 0.38% 155 3s H 23 13 88369.000000 88151.4621 0.25% 90.6 3s * 24 13 14 88342.000000 88151.4621 0.22% 87.3 3s * 39 10 9 88335.000000 88238.0895 0.11% 73.0 3s Cutting planes: Implied bound: 175 Flow cover: 3 Explored 54 nodes (8596 simplex iterations) in 3.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.833500000000e+04, best bound 8.833500000000e+04, gap 0.0%