Build (method = -2) #dp: 3464 Step-3' Graph: 112 vertices and 353 arcs (0.02s) Step-4' Graph: 29 vertices and 187 arcs (0.02s) #V4/#V3 = 0.26 #A4/#A3 = 0.53 Ready! (0.02s) Optimize a model with 109 rows, 188 columns and 511 nonzeros Presolve removed 29 rows and 30 columns Presolve time: 0.00s Presolved: 80 rows, 158 columns, 422 nonzeros Variable types: 0 continuous, 158 integer (1 binary) Found heuristic solution: objective 496.0000000 Found heuristic solution: objective 310.0000000 Optimize a model with 80 rows, 158 columns and 422 nonzeros Presolve removed 1 rows and 1 columns Presolved: 79 rows, 157 columns, 420 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.550e+02 Factor NZ : 1.046e+03 Factor Ops : 2.100e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.29400377e+03 -8.43997696e+03 1.32e+03 2.22e-16 1.52e+02 0s 1 1.66017077e+03 -2.43179597e+03 1.63e+02 8.88e-16 2.17e+01 0s 2 4.19728905e+02 -3.27211598e+02 2.58e+00 3.24e-14 2.13e+00 0s 3 3.00860489e+02 5.42149907e+01 2.87e-02 1.02e-14 6.72e-01 0s 4 2.54132598e+02 2.11752324e+02 2.00e-03 1.67e-15 1.15e-01 0s 5 2.50141404e+02 2.49422273e+02 7.51e-05 1.69e-16 1.96e-03 0s 6 2.50000002e+02 2.49999997e+02 1.28e-09 3.33e-16 1.28e-08 0s 7 2.50000000e+02 2.50000000e+02 1.57e-13 3.49e-16 1.29e-14 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 2.50000000e+02 Root relaxation: objective 2.500000e+02, 76 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 250.0000000 250.00000 0.0% - 0s Explored 0 nodes (76 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.500000000000e+02, best bound 2.500000000000e+02, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 250 Solution: 2 x [13, 80] 8 x [7, 80] 6 x [12, 79] 4 x [18, 78] 7 x [29, 77] 1 x [21, 77] 3 x [11, 76] 10 x [31, 75] 1 x [18, 75] 6 x [35, 74] 5 x [27, 73] 7 x [34, 72] 1 x [17, 72] 4 x [17, 71] 7 x [39, 70] 6 x [10, 69] 7 x [15, 68] 6 x [43, 67] 8 x [14, 66] 3 x [9, 66] 2 x [11, 65] 8 x [1, 65] 7 x [45, 64] 1 x [5, 64] 4 x [16, 63] 3 x [3, 62] 2 x [37, 61] 1 x [3, 61] 5 x [44, 60] 3 x [51, 59] 7 x [49, 59] 2 x [32, 58] 1 x [3, 58] 8 x [53, 57] 6 x [52, 56] 1 x [53, 55] 5 x [52, 55] 5 x [42, 54] 7 x [4, 50] 7 x [6, 48] 5 x [46, 47] 6 x [8, 42] 5 x [40, 41] 7 x [23, 38] 1 x [16, 38] 6 x [33, 36] 8 x [24, 30] 3 x [13, 30] 5 x [22, 28] 6 x [19, 26] 4 x [21, 25] 7 x [2, 20]