Build (method = -2) #dp: 2385 Step-3' Graph: 91 vertices and 289 arcs (0.01s) Step-4' Graph: 23 vertices and 153 arcs (0.01s) #V4/#V3 = 0.25 #A4/#A3 = 0.53 Ready! (0.01s) Optimize a model with 91 rows, 154 columns and 420 nonzeros Presolve removed 54 rows and 65 columns Presolve time: 0.00s Presolved: 37 rows, 89 columns, 221 nonzeros Variable types: 0 continuous, 89 integer (15 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 64.0000000 Found heuristic solution: objective 53.0000000 Optimize a model with 37 rows, 89 columns and 221 nonzeros Presolve removed 1 rows and 2 columns Presolved: 36 rows, 87 columns, 217 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.900e+01 Factor NZ : 4.130e+02 Factor Ops : 6.339e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.36365060e+03 -1.56082260e+03 1.82e+02 4.44e-16 4.87e+01 0s 1 3.16545692e+02 -4.73701726e+02 2.37e+01 8.88e-16 7.32e+00 0s 2 8.33866949e+01 -5.36472578e+01 5.11e-01 8.22e-14 7.58e-01 0s 3 5.86860789e+01 1.94325816e+01 5.76e-03 2.31e-14 2.07e-01 0s 4 5.05095524e+01 4.62849807e+01 4.35e-04 6.38e-16 2.22e-02 0s 5 5.00079989e+01 4.99852726e+01 4.17e-06 6.66e-16 1.20e-04 0s 6 5.00000000e+01 5.00000000e+01 5.50e-12 9.99e-16 1.55e-10 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 5.00000000e+01 Root relaxation: objective 5.000000e+01, 41 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 50.0000000 50.00000 0.0% - 0s Explored 0 nodes (42 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 50 Solution: 2 x [14, 68] 1 x [17, 67] 1 x [16, 66] 2 x [18, 65] 2 x [8, 64] 1 x [23, 63] 3 x [2, 62] 1 x [20, 61] 2 x [27, 60] 1 x [15, 59] 1 x [13, 58] 1 x [12, 57] 1 x [11, 56] 1 x [30, 55] 3 x [19, 55] 1 x [32, 54] 2 x [25, 53] 1 x [35, 52] 1 x [5, 51] 1 x [4, 50] 2 x [39, 49] 2 x [38, 48] 1 x [41, 47] 1 x [43, 46] 1 x [44, 45] 1 x [42, 45] 1 x [1, 41] 2 x [3, 40] 2 x [35, 37] 1 x [6, 36] 1 x [7, 34] 1 x [9, 33] 2 x [28, 31] 1 x [10, 29] 1 x [24, 26] 1 x [21, 22]