Build (method = -2) #dp: 1887 Step-3' Graph: 68 vertices and 817 arcs (0.01s) Step-4' Graph: 62 vertices and 805 arcs (0.01s) #V4/#V3 = 0.91 #A4/#A3 = 0.99 Ready! (0.01s) Optimize a model with 122 rows, 806 columns and 2298 nonzeros Presolve removed 39 rows and 50 columns Presolve time: 0.02s Presolved: 83 rows, 756 columns, 2127 nonzeros Variable types: 0 continuous, 756 integer (503 binary) Found heuristic solution: objective 80.0000000 Found heuristic solution: objective 77.0000000 Found heuristic solution: objective 71.0000000 Optimize a model with 83 rows, 756 columns and 2127 nonzeros Presolved: 83 rows, 756 columns, 2127 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.112e+03 Factor NZ : 2.158e+03 Factor Ops : 7.219e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.78376101e+03 -2.50177489e+03 3.37e+03 1.87e-01 1.34e+01 0s 1 4.28486171e+02 -7.19289098e+02 5.20e+02 5.55e-16 2.27e+00 0s 2 1.25859977e+02 -1.81455618e+02 5.23e+01 2.44e-15 3.29e-01 0s 3 7.45738890e+01 7.89317653e+00 3.65e+00 1.44e-15 5.01e-02 0s 4 6.54657380e+01 4.43940986e+01 9.89e-01 2.89e-15 1.49e-02 0s 5 6.10918304e+01 4.88539982e+01 3.48e-01 1.33e-15 8.36e-03 0s 6 5.86302031e+01 5.38097061e+01 1.30e-01 1.66e-15 3.29e-03 0s 7 5.80389277e+01 5.76277307e+01 1.53e-02 1.03e-15 2.87e-04 0s 8 5.80000793e+01 5.79996282e+01 2.24e-13 2.22e-15 2.97e-07 0s 9 5.80000000e+01 5.80000000e+01 4.57e-14 8.88e-16 2.97e-13 0s Barrier solved model in 9 iterations and 0.01 seconds Optimal objective 5.80000000e+01 Root relaxation: objective 5.800000e+01, 298 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 58.0000000 58.00000 0.0% - 0s Explored 0 nodes (298 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.03 seconds Total run time: 0.05 seconds Objective: 58 Solution: 1 x [60] 1 x [1, 60] 1 x [2, 59] 1 x [3, 58] 1 x [4, 57] 1 x [56] 3 x [55] 2 x [54] 4 x [53] 3 x [52] 1 x [9, 51] 2 x [50] 2 x [49] 2 x [12, 48] 1 x [13, 47] 1 x [14, 46] 1 x [14, 45] 1 x [11, 44] 1 x [15, 43] 1 x [19, 42] 1 x [17, 42] 1 x [14, 42] 2 x [20, 41] 2 x [10, 41] 1 x [7, 41] 1 x [16, 40] 2 x [21, 39] 1 x [22, 38] 1 x [23, 37] 2 x [21, 37] 1 x [24, 36] 1 x [5, 6, 36] 1 x [25, 35] 1 x [2, 8, 35] 2 x [27, 34] 2 x [28, 33] 1 x [26, 33] 1 x [30, 32] 1 x [29, 32] 1 x [18, 32] 1 x [31, 31]