Build (method = -2) #dp: 1918 Step-3' Graph: 68 vertices and 225 arcs (0.01s) Step-4' Graph: 24 vertices and 137 arcs (0.01s) #V4/#V3 = 0.35 #A4/#A3 = 0.61 Ready! (0.01s) Optimize a model with 86 rows, 138 columns and 371 nonzeros Presolve removed 47 rows and 49 columns Presolve time: 0.00s Presolved: 39 rows, 89 columns, 221 nonzeros Variable types: 0 continuous, 89 integer (13 binary) Found heuristic solution: objective 80.0000000 Found heuristic solution: objective 67.0000000 Found heuristic solution: objective 55.0000000 Optimize a model with 39 rows, 89 columns and 221 nonzeros Presolved: 39 rows, 89 columns, 221 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.500e+01 Factor NZ : 5.480e+02 Factor Ops : 1.080e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.89434978e+03 -1.29581633e+03 1.03e+02 2.22e-16 5.12e+01 0s 1 3.85159159e+02 -4.42713508e+02 1.19e+01 6.66e-16 7.25e+00 0s 2 9.44267297e+01 -4.19770538e+01 3.16e-01 1.57e-14 7.42e-01 0s 3 6.88091201e+01 2.02828974e+01 2.63e-03 6.00e-15 2.48e-01 0s 4 5.31365404e+01 4.63391321e+01 5.50e-05 9.99e-16 3.47e-02 0s 5 5.34453092e+01 5.15319056e+01 2.90e-05 4.44e-16 9.76e-03 0s 6 5.25096578e+01 5.24174672e+01 1.76e-06 3.33e-16 4.70e-04 0s 7 5.25000008e+01 5.24999988e+01 2.40e-11 4.44e-16 1.01e-08 0s 8 5.25000000e+01 5.25000000e+01 2.02e-14 5.55e-16 1.01e-11 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 5.25000000e+01 Root relaxation: objective 5.250000e+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 52.50000 0 2 55.00000 52.50000 4.55% - 0s H 0 0 53.0000000 52.50000 0.94% - 0s Explored 0 nodes (43 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 53 Solution: 2 x [62] 1 x [1, 61] 1 x [60] 2 x [2, 59] 1 x [3, 58] 2 x [1, 58] 1 x [4, 57] 2 x [56] 2 x [5, 55] 1 x [6, 54] 1 x [8, 53] 1 x [10, 52] 1 x [9, 51] 1 x [13, 50] 4 x [15, 49] 1 x [16, 48] 2 x [17, 47] 2 x [20, 46] 1 x [18, 45] 2 x [19, 44] 1 x [21, 43] 1 x [24, 42] 1 x [22, 41] 3 x [14, 40] 1 x [18, 39] 1 x [12, 38] 1 x [28, 37] 2 x [30, 36] 1 x [9, 35] 1 x [32, 34] 1 x [7, 33] 1 x [33, 33] 1 x [32] 1 x [11, 31] 1 x [28, 29] 1 x [11, 27] 2 x [23, 26] 1 x [21, 25]