Build (method = -2) #dp: 2227 Step-3' Graph: 81 vertices and 833 arcs (0.01s) Step-4' Graph: 57 vertices and 785 arcs (0.01s) #V4/#V3 = 0.70 #A4/#A3 = 0.94 Ready! (0.01s) Optimize a model with 114 rows, 786 columns and 2250 nonzeros Presolve removed 26 rows and 35 columns Presolve time: 0.02s Presolved: 88 rows, 751 columns, 2057 nonzeros Variable types: 0 continuous, 751 integer (391 binary) Found heuristic solution: objective 78.0000000 Optimize a model with 88 rows, 751 columns and 2057 nonzeros Presolved: 88 rows, 751 columns, 2057 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.109e+03 Factor NZ : 2.248e+03 Factor Ops : 7.957e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.75856493e+03 -2.67994071e+03 3.98e+03 2.49e-01 1.36e+01 0s 1 4.54561782e+02 -7.92991573e+02 7.12e+02 4.44e-16 2.56e+00 0s 2 1.19878166e+02 -2.11168704e+02 7.75e+01 4.44e-16 3.71e-01 0s 3 6.78196587e+01 -1.85465452e+01 1.35e+01 4.44e-16 7.52e-02 0s 4 5.27543239e+01 1.37486109e+01 3.01e+00 2.22e-16 2.87e-02 0s 5 4.74944090e+01 3.00642011e+01 1.06e+00 2.22e-16 1.20e-02 0s 6 4.45424212e+01 3.84128510e+01 1.72e-01 1.11e-16 4.08e-03 0s 7 4.38168700e+01 4.11837331e+01 6.58e-02 6.09e-16 1.74e-03 0s 8 4.32746712e+01 4.23509634e+01 2.01e-02 4.06e-16 6.10e-04 0s 9 4.30231932e+01 4.27243721e+01 5.03e-03 3.33e-16 1.97e-04 0s 10 4.29403736e+01 4.29014475e+01 2.72e-04 3.33e-16 2.56e-05 0s 11 4.29280318e+01 4.29264061e+01 1.60e-05 3.92e-16 1.07e-06 0s 12 4.29270843e+01 4.29270826e+01 9.92e-13 4.44e-16 1.08e-09 0s 13 4.29270833e+01 4.29270833e+01 2.28e-13 6.66e-16 1.08e-12 0s Barrier solved model in 13 iterations and 0.01 seconds Optimal objective 4.29270833e+01 Root relaxation: objective 4.292708e+01, 46 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.92708 0 34 78.00000 42.92708 45.0% - 0s H 0 0 48.0000000 42.92708 10.6% - 0s H 0 0 45.0000000 42.92708 4.61% - 0s H 0 0 44.0000000 42.92708 2.44% - 0s 0 0 43.00000 0 5 44.00000 43.00000 2.27% - 0s 0 0 43.00000 0 25 44.00000 43.00000 2.27% - 0s 0 0 43.00000 0 41 44.00000 43.00000 2.27% - 0s H 0 0 43.0000000 43.00000 0.0% - 0s Cutting planes: Gomory: 1 Explored 0 nodes (324 simplex iterations) in 0.12 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: 0.02 seconds Gurobi run time: 0.12 seconds Total run time: 0.14 seconds Objective: 43 Solution: 2 x [17, 57] 2 x [15, 56] 1 x [19, 55] 1 x [16, 55] 1 x [20, 54] 2 x [18, 54] 1 x [14, 54] 1 x [21, 53] 1 x [22, 52] 1 x [23, 51] 1 x [23, 50] 1 x [24, 49] 1 x [26, 48] 1 x [28, 47] 1 x [27, 47] 1 x [1, 4, 47] 1 x [29, 46] 1 x [30, 45] 2 x [29, 44] 1 x [31, 43] 1 x [3, 6, 43] 1 x [1, 5, 43] 1 x [1, 8, 42] 1 x [32, 41] 1 x [32, 40] 1 x [32, 39] 2 x [2, 10, 39] 1 x [35, 38] 1 x [3, 11, 38] 1 x [36, 37] 1 x [36, 36] 1 x [5, 12, 34] 1 x [9, 9, 34] 2 x [7, 12, 33] 1 x [13, 14, 25] 1 x [14, 14, 23] 1 x [14, 14, 22]