Build (method = -2) #dp: 1238 Step-3' Graph: 72 vertices and 220 arcs (0.00s) Step-4' Graph: 13 vertices and 102 arcs (0.01s) #V4/#V3 = 0.18 #A4/#A3 = 0.46 Ready! (0.01s) Optimize a model with 61 rows, 103 columns and 288 nonzeros Presolve removed 33 rows and 39 columns Presolve time: 0.00s Presolved: 28 rows, 64 columns, 170 nonzeros Variable types: 0 continuous, 64 integer (10 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 44.0000000 Optimize a model with 28 rows, 64 columns and 170 nonzeros Presolved: 28 rows, 64 columns, 170 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.300e+01 Factor NZ : 2.410e+02 Factor Ops : 2.599e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.19625587e+02 -3.72272563e+02 5.23e+01 2.22e-16 1.53e+01 0s 1 1.09927243e+02 -1.42296940e+02 4.88e+00 4.44e-16 2.38e+00 0s 2 5.35351094e+01 1.09113618e+01 4.17e-14 1.12e-15 2.94e-01 0s 3 4.33492945e+01 4.06654544e+01 5.77e-15 8.88e-16 1.85e-02 0s 4 4.30018040e+01 4.29955109e+01 4.62e-15 5.55e-16 4.34e-05 0s 5 4.30000000e+01 4.30000000e+01 4.66e-15 6.66e-16 6.26e-11 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 4.30000000e+01 Root relaxation: objective 4.300000e+01, 37 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 43.0000000 43.00000 0.0% - 0s Explored 0 nodes (37 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 43 Solution: 1 x [17, 46] 1 x [24, 38] 1 x [26, 31] 1 x [25, 37] 1 x [2, 9] 1 x [34, 43] 1 x [32, 47] 1 x [29, 48] 1 x [5, 33] 1 x [30, 35] 1 x [16, 20] 2 x [38, 41] 1 x [27, 42] 1 x [28, 40] 2 x [28, 32] 1 x [3, 27] 1 x [19, 27] 1 x [4, 16] 3 x [10, 21] 1 x [6, 14] 1 x [14, 15] 1 x [32, 44] 1 x [7, 32] 1 x [13, 36] 4 x [11, 23] 1 x [1, 46] 3 x [39, 46] 2 x [8, 12] 3 x [13, 45] 2 x [18, 22]