Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:57:13 2013 Optimize a model with 726 rows, 43626 columns and 87186 nonzeros Presolve time: 0.06s Presolved: 726 rows, 43626 columns, 87186 nonzeros Variable types: 43560 continuous, 66 integer (66 binary) Root relaxation: objective 7.247951e+04, 1722 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72479.5074 0 6 - 72479.5074 - - 0s H 0 0 75681.000000 72479.5074 4.23% - 0s 0 0 72670.0571 0 4 75681.0000 72670.0571 3.98% - 0s H 0 0 74674.000000 72670.0571 2.68% - 0s 0 0 72696.7250 0 3 74674.0000 72696.7250 2.65% - 0s H 0 0 74665.000000 72696.7250 2.64% - 0s 0 0 72709.2785 0 4 74665.0000 72709.2785 2.62% - 0s H 0 0 74652.000000 72709.2785 2.60% - 0s 0 0 72715.3346 0 3 74652.0000 72715.3346 2.59% - 0s 0 0 72716.0815 0 3 74652.0000 72716.0815 2.59% - 0s H 0 0 74638.000000 72716.0815 2.57% - 0s 0 0 72716.2600 0 3 74638.0000 72716.2600 2.57% - 0s 0 0 72718.3866 0 3 74638.0000 72718.3866 2.57% - 0s 0 0 72720.7894 0 3 74638.0000 72720.7894 2.57% - 0s 0 0 72720.7894 0 3 74638.0000 72720.7894 2.57% - 0s H 0 0 73700.000000 72720.7894 1.33% - 0s 0 0 72720.8095 0 3 73700.0000 72720.8095 1.33% - 0s 0 0 72720.8095 0 3 73700.0000 72720.8095 1.33% - 1s 0 2 72723.4894 0 3 73700.0000 72723.4894 1.32% - 1s H 5 4 73280.000000 72821.4667 0.63% 51.8 1s * 14 8 13 73082.000000 72826.6600 0.35% 44.0 1s * 21 8 11 72995.000000 72830.4932 0.23% 45.0 1s Cutting planes: Implied bound: 107 Flow cover: 4 Explored 34 nodes (3793 simplex iterations) in 1.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.299500000000e+04, best bound 7.299078658338e+04, gap 0.0058%