Build (method = -2) #dp: 819 Step-3' Graph: 165 vertices and 488 arcs (0.01s) Step-4' Graph: 47 vertices and 252 arcs (0.01s) #V4/#V3 = 0.28 #A4/#A3 = 0.52 Ready! (0.01s) Optimize a model with 87 rows, 253 columns and 669 nonzeros Presolve removed 24 rows and 29 columns Presolve time: 0.00s Presolved: 63 rows, 224 columns, 592 nonzeros Variable types: 0 continuous, 224 integer (0 binary) Found heuristic solution: objective 3547.0000000 Found heuristic solution: objective 2464.0000000 Optimize a model with 63 rows, 224 columns and 592 nonzeros Presolved: 63 rows, 224 columns, 592 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.210e+02 Factor NZ : 9.300e+02 Factor Ops : 1.545e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.00851076e+04 -5.73644375e+04 1.26e+05 1.11e-16 9.38e+02 0s 1 9.74001181e+03 -1.87195185e+04 1.89e+04 8.88e-16 1.57e+02 0s 2 3.63510077e+03 -3.07358482e+03 4.76e+02 2.78e-15 1.61e+01 0s 3 2.99138977e+03 8.28366691e+02 4.42e+00 3.91e-15 4.64e+00 0s 4 2.58526277e+03 1.86625700e+03 6.09e-01 1.94e-15 1.54e+00 0s 5 2.47964504e+03 2.27439252e+03 1.40e-01 2.02e-15 4.40e-01 0s 6 2.46654166e+03 2.46165173e+03 1.27e-02 2.71e-15 1.05e-02 0s 7 2.46400012e+03 2.46399954e+03 9.35e-07 2.07e-15 1.23e-06 0s Barrier performed 7 iterations in 0.00 seconds Objective cutoff exceeded Root relaxation: cutoff, 0 iterations, 0.00 seconds Explored 0 nodes (0 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.464000000000e+03, best bound 2.464000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 2464 Solution: 7 x [1] 26 x [1, 39] 73 x [1, 40] 7 x [2] 164 x [2, 38] 100 x [3] 63 x [3, 37] 14 x [4, 35] 7 x [4, 36] 25 x [5] 9 x [5, 33] 4 x [5, 34] 171 x [5, 36] 40 x [6, 33] 132 x [7, 34] 13 x [8, 29] 1 x [8, 30] 60 x [8, 31] 22 x [9, 30] 185 x [9, 32] 70 x [10, 25] 101 x [10, 26] 15 x [10, 30] 86 x [11, 27] 74 x [11, 28] 26 x [11, 29] 162 x [12] 63 x [13] 7 x [14] 112 x [15] 138 x [16] 85 x [17] 138 x [18] 73 x [19] 11 x [20] 25 x [20, 21] 39 x [20, 22] 73 x [20, 23] 43 x [20, 24]