Build (method = -2) #dp: 1259 Step-3' Graph: 55 vertices and 183 arcs (0.00s) Step-4' Graph: 24 vertices and 121 arcs (0.00s) #V4/#V3 = 0.44 #A4/#A3 = 0.66 Ready! (0.00s) Optimize a model with 76 rows, 122 columns and 322 nonzeros Presolve removed 41 rows and 44 columns Presolve time: 0.00s Presolved: 35 rows, 78 columns, 193 nonzeros Variable types: 0 continuous, 78 integer (11 binary) Found heuristic solution: objective 82.0000000 Found heuristic solution: objective 76.0000000 Found heuristic solution: objective 56.0000000 Optimize a model with 35 rows, 78 columns and 193 nonzeros Presolve removed 1 rows and 1 columns Presolved: 34 rows, 77 columns, 191 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 6.500e+01 Factor NZ : 3.550e+02 Factor Ops : 4.805e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.45525619e+03 -1.09683606e+03 6.64e+01 2.22e-16 4.21e+01 0s 1 3.18682212e+02 -3.17375389e+02 1.12e+01 5.55e-16 6.02e+00 0s 2 8.93348462e+01 -6.15042527e+00 1.47e-01 6.55e-15 5.83e-01 0s 3 6.53111614e+01 3.58016786e+01 4.23e-04 2.00e-15 1.76e-01 0s 4 5.52070238e+01 4.83331895e+01 5.93e-05 2.22e-16 4.09e-02 0s 5 5.39928875e+01 5.27860215e+01 9.46e-06 4.29e-16 7.18e-03 0s 6 5.35020197e+01 5.34901671e+01 5.39e-08 4.44e-16 7.06e-05 0s 7 5.35000000e+01 5.35000000e+01 2.79e-13 3.33e-16 3.44e-10 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 5.35000000e+01 Root relaxation: objective 5.350000e+01, 32 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.50000 0 2 56.00000 53.50000 4.46% - 0s H 0 0 54.0000000 53.50000 0.93% - 0s Explored 0 nodes (35 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 54 Solution: 1 x [52] 1 x [51] 1 x [1, 51] 1 x [2, 50] 3 x [49] 2 x [48] 1 x [5, 47] 2 x [6, 46] 2 x [3, 45] 1 x [7, 44] 2 x [2, 43] 1 x [8, 42] 1 x [4, 42] 1 x [2, 41] 3 x [10, 40] 1 x [11, 39] 3 x [9, 38] 2 x [13, 37] 1 x [12, 37] 2 x [14, 36] 1 x [35] 1 x [15, 35] 1 x [16, 34] 2 x [17, 33] 2 x [19, 32] 3 x [16, 31] 1 x [22, 30] 1 x [25, 29] 1 x [22, 28] 1 x [27, 27] 1 x [25, 26] 1 x [24, 24] 1 x [22, 23] 1 x [16, 21] 1 x [18, 20] 3 x [14, 15]