Build (method = -2) #dp: 699 Step-3' Graph: 181 vertices and 536 arcs (0.00s) Step-4' Graph: 42 vertices and 258 arcs (0.00s) #V4/#V3 = 0.23 #A4/#A3 = 0.48 Ready! (0.00s) Optimize a model with 81 rows, 259 columns and 697 nonzeros Presolve removed 20 rows and 27 columns Presolve time: 0.00s Presolved: 61 rows, 232 columns, 625 nonzeros Variable types: 0 continuous, 232 integer (0 binary) Found heuristic solution: objective 3478.0000000 Found heuristic solution: objective 3180.0000000 Optimize a model with 61 rows, 232 columns and 625 nonzeros Presolved: 61 rows, 232 columns, 625 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.440e+02 Factor NZ : 1.005e+03 Factor Ops : 1.917e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.18162281e+04 -6.03938837e+04 1.12e+05 2.22e-16 8.98e+02 0s 1 1.00808957e+04 -2.00062428e+04 1.70e+04 8.88e-16 1.53e+02 0s 2 3.51712647e+03 -3.50372809e+03 4.00e+02 4.44e-16 1.59e+01 0s 3 2.59987613e+03 5.80904709e+02 2.08e-01 3.89e-16 4.16e+00 0s 4 2.05714796e+03 1.47783715e+03 2.24e-02 2.64e-16 1.19e+00 0s 5 1.97177822e+03 1.76760515e+03 9.84e-03 2.22e-16 4.21e-01 0s 6 1.92362004e+03 1.89505130e+03 2.42e-03 3.33e-16 5.89e-02 0s 7 1.91509394e+03 1.90655098e+03 6.62e-04 2.27e-16 1.76e-02 0s 8 1.91091346e+03 1.91056989e+03 8.94e-07 4.44e-16 7.08e-04 0s 9 1.91083334e+03 1.91083333e+03 4.32e-11 2.22e-16 1.66e-08 0s 10 1.91083333e+03 1.91083333e+03 5.12e-12 2.22e-16 1.66e-11 0s Barrier solved model in 10 iterations and 0.00 seconds Optimal objective 1.91083333e+03 Root relaxation: objective 1.910833e+03, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 1910.83333 0 9 3180.00000 1910.83333 39.9% - 0s H 0 0 1912.0000000 1910.83333 0.06% - 0s H 0 0 1911.0000000 1910.83333 0.01% - 0s Explored 0 nodes (105 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.911000000000e+03, best bound 1.911000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 1911 Solution: 37 x [1] 130 x [2, 39] 31 x [3, 36] 6 x [3, 38] 94 x [4, 34] 24 x [5, 35] 1 x [5, 38] 62 x [6, 35] 18 x [7, 33] 82 x [8, 33] 5 x [9, 26] 1 x [9, 27] 77 x [9, 28] 40 x [10, 26] 156 x [11, 26] 2 x [12, 27] 106 x [12, 29] 23 x [12, 32] 91 x [13, 24] 52 x [13, 27] 94 x [14, 21] 1 x [14, 27] 57 x [15, 19] 142 x [15, 20] 9 x [16, 19] 98 x [16, 23] 138 x [17, 18] 45 x [17, 22] 39 x [18, 19] 35 x [20, 23] 1 x [21, 26, 39] 56 x [21, 33, 37] 29 x [23, 32, 34] 8 x [23, 32, 38] 23 x [25, 31, 33] 4 x [27, 31, 32] 22 x [28, 29, 32] 16 x [28, 31, 32] 56 x [30, 31, 32]