Build (method = -2) #dp: 1253 Step-3' Graph: 264 vertices and 785 arcs (0.01s) Step-4' Graph: 146 vertices and 549 arcs (0.01s) #V4/#V3 = 0.55 #A4/#A3 = 0.70 Ready! (0.01s) Optimize a model with 166 rows, 550 columns and 1362 nonzeros Presolve removed 31 rows and 57 columns Presolve time: 0.01s Presolved: 135 rows, 493 columns, 1323 nonzeros Variable types: 0 continuous, 493 integer (0 binary) Found heuristic solution: objective 1194.0000000 Optimize a model with 135 rows, 493 columns and 1323 nonzeros Presolved: 135 rows, 493 columns, 1323 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 8.780e+02 Factor NZ : 3.244e+03 Factor Ops : 9.485e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.60267089e+03 -7.12699316e+04 7.11e+04 2.22e-16 3.98e+02 0s 1 3.16958981e+03 -2.85587222e+04 1.14e+04 6.66e-16 7.54e+01 0s 2 1.57216195e+03 -7.74982217e+03 1.40e+03 5.00e-16 1.34e+01 0s 3 1.19227208e+03 -1.49600724e+03 1.64e+02 4.44e-16 2.97e+00 0s 4 9.52932751e+02 -2.82635622e+02 1.69e+01 2.78e-16 1.25e+00 0s 5 8.76273938e+02 1.87333425e+02 8.56e+00 2.22e-16 6.95e-01 0s 6 8.02947134e+02 3.94545705e+02 4.37e+00 2.21e-16 4.11e-01 0s 7 7.34404323e+02 5.32052130e+02 1.57e+00 3.26e-16 2.03e-01 0s 8 7.11934069e+02 5.88772624e+02 6.37e-01 2.67e-16 1.23e-01 0s 9 6.84537343e+02 6.64210312e+02 3.41e-02 2.54e-16 2.03e-02 0s 10 6.82433756e+02 6.79127443e+02 3.37e-03 2.81e-16 3.30e-03 0s 11 6.82008433e+02 6.81985972e+02 2.06e-05 3.33e-16 2.24e-05 0s 12 6.82000000e+02 6.82000000e+02 3.83e-11 3.33e-16 3.37e-11 0s Barrier solved model in 12 iterations and 0.01 seconds Optimal objective 6.82000000e+02 Root relaxation: objective 6.820000e+02, 226 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 682.0000000 682.00000 0.0% - 0s Explored 0 nodes (302 simplex iterations) in 0.02 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.820000000000e+02, best bound 6.820000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.02 seconds Total run time: 0.04 seconds Objective: 682 Solution: 90 x [1, 13] 37 x [2, 13, 18] 40 x [2, 14, 15] 26 x [3, 9] 50 x [3, 10, 19] 26 x [4, 5] 60 x [4, 5, 17] 22 x [4, 6] 23 x [4, 9, 12] 7 x [4, 9, 13] 11 x [4, 9, 14, 18] 17 x [4, 9, 18] 6 x [4, 9, 19] 60 x [5, 7, 15, 20] 24 x [5, 9, 13] 35 x [5, 9, 15, 16] 2 x [5, 9, 16] 125 x [7, 10, 11] 9 x [8, 9, 10] 12 x [8, 9, 10, 20]