Build (method = -2) #dp: 739 Step-3' Graph: 38 vertices and 130 arcs (0.00s) Step-4' Graph: 16 vertices and 86 arcs (0.00s) #V4/#V3 = 0.42 #A4/#A3 = 0.66 Ready! (0.00s) Optimize a model with 56 rows, 87 columns and 234 nonzeros Presolve removed 25 rows and 28 columns Presolve time: 0.00s Presolved: 31 rows, 59 columns, 154 nonzeros Variable types: 0 continuous, 59 integer (0 binary) Found heuristic solution: objective 2237.0000000 Found heuristic solution: objective 1741.0000000 Optimize a model with 31 rows, 59 columns and 154 nonzeros Presolve removed 1 rows and 1 columns Presolved: 30 rows, 58 columns, 152 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.700e+01 Factor NZ : 4.650e+02 Factor Ops : 9.455e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.34839265e+04 -9.47305453e+03 5.16e+03 2.22e-16 3.78e+02 0s 1 3.61252452e+03 -1.92681985e+03 4.95e+02 4.44e-16 5.47e+01 0s 2 1.81625178e+03 5.71423087e+02 2.40e+01 2.00e-15 9.51e+00 0s 3 1.32919601e+03 1.22397154e+03 1.28e-13 1.17e-15 7.85e-01 0s 4 1.28525555e+03 1.27813389e+03 8.24e-13 3.33e-16 5.31e-02 0s 5 1.28408153e+03 1.28375546e+03 2.36e-12 3.33e-16 2.43e-03 0s 6 1.28400001e+03 1.28399999e+03 3.69e-13 1.11e-16 1.29e-07 0s 7 1.28400000e+03 1.28400000e+03 1.90e-12 4.44e-16 1.31e-13 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 1.28400000e+03 Root relaxation: objective 1.284000e+03, 28 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 1284.0000000 1284.00000 0.0% - 0s Explored 0 nodes (28 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 1.284000000000e+03, best bound 1.284000000000e+03, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 1284 Solution: 89 x [30] 96 x [6] 51 x [39] 44 x [34, 39] 1 x [11, 20] 42 x [4, 11] 6 x [32, 40] 69 x [1, 40] 6 x [16, 27] 26 x [27, 35] 2 x [9, 16] 15 x [9, 38] 45 x [9, 19] 13 x [11, 31] 13 x [2, 22] 95 x [13, 23] 10 x [14, 22] 72 x [5, 14] 31 x [24, 37] 84 x [12, 38] 1 x [7, 37] 2 x [7, 13] 64 x [7, 17] 4 x [7, 32] 86 x [3, 8] 56 x [10, 36] 14 x [25, 36] 37 x [26, 28] 85 x [16, 21] 7 x [15, 26] 3 x [15, 25] 49 x [15, 29] 1 x [15, 22] 2 x [15, 33] 30 x [18, 22] 33 x [18, 18]