Build (method = -2) #dp: 746 Step-3' Graph: 153 vertices and 452 arcs (0.00s) Step-4' Graph: 87 vertices and 320 arcs (0.00s) #V4/#V3 = 0.57 #A4/#A3 = 0.71 Ready! (0.00s) Optimize a model with 107 rows, 321 columns and 793 nonzeros Presolve removed 27 rows and 45 columns Presolve time: 0.00s Presolved: 80 rows, 276 columns, 741 nonzeros Variable types: 0 continuous, 276 integer (1 binary) Found heuristic solution: objective 574.0000000 Optimize a model with 80 rows, 276 columns and 741 nonzeros Presolved: 80 rows, 276 columns, 741 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.050e+02 Factor NZ : 1.661e+03 Factor Ops : 3.952e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.88174435e+03 -1.76092805e+04 2.21e+04 1.11e-16 1.83e+02 0s 1 1.33150781e+03 -7.15817459e+03 4.42e+03 5.55e-16 3.91e+01 0s 2 7.33697722e+02 -1.87881503e+03 4.75e+02 1.44e-15 6.48e+00 0s 3 5.53770437e+02 -1.93142934e+02 3.10e+01 6.66e-16 1.39e+00 0s 4 5.11054734e+02 2.34456874e+02 7.25e+00 2.43e-16 4.99e-01 0s 5 4.84869824e+02 3.68350863e+02 3.32e+00 2.22e-16 2.09e-01 0s 6 4.61495234e+02 4.04701441e+02 1.12e+00 2.45e-16 1.02e-01 0s 7 4.53141180e+02 4.29245040e+02 4.17e-01 2.02e-16 4.26e-02 0s 8 4.48549798e+02 4.42408847e+02 9.03e-02 3.01e-16 1.09e-02 0s 9 4.47073058e+02 4.46849363e+02 2.60e-03 3.02e-16 3.98e-04 0s 10 4.47004468e+02 4.46996672e+02 1.04e-04 1.74e-16 1.39e-05 0s 11 4.47000000e+02 4.47000000e+02 1.08e-09 2.80e-16 2.07e-10 0s Barrier solved model in 11 iterations and 0.00 seconds Optimal objective 4.47000000e+02 Root relaxation: objective 4.470000e+02, 93 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 447.0000000 447.00000 0.0% - 0s Explored 0 nodes (93 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.470000000000e+02, best bound 4.470000000000e+02, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 447 Solution: 36 x [1] 68 x [4, 19] 25 x [4, 9] 38 x [12, 13] 16 x [6, 15] 50 x [2, 6] 32 x [6, 9, 17] 46 x [8, 16] 1 x [8, 11, 18] 2 x [8, 9, 11] 17 x [5, 11, 17] 10 x [10, 17, 20] 15 x [10, 11, 13, 17] 14 x [2, 7, 14] 6 x [7, 9, 17, 20] 8 x [2, 3, 7, 11] 28 x [3, 7, 11, 13] 16 x [11, 14, 16] 19 x [2, 13, 16, 20]