Build (method = -2) #dp: 8189 Step-3' Graph: 181 vertices and 1563 arcs (0.04s) Step-4' Graph: 137 vertices and 1475 arcs (0.04s) #V4/#V3 = 0.76 #A4/#A3 = 0.94 Ready! (0.04s) Optimize a model with 199 rows, 1476 columns and 4159 nonzeros Presolve removed 30 rows and 37 columns Presolve time: 0.04s Presolved: 169 rows, 1439 columns, 4106 nonzeros Variable types: 0 continuous, 1439 integer (798 binary) Found heuristic solution: objective 66.0000000 Found heuristic solution: objective 64.0000000 Optimize a model with 169 rows, 1439 columns and 4106 nonzeros Presolved: 169 rows, 1439 columns, 4106 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.244e+03 Factor NZ : 7.767e+03 Factor Ops : 4.551e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 4.39123413e+03 -1.87276315e+04 6.41e+03 2.47e-01 6.97e+01 0s 1 1.08136131e+03 -4.98556809e+03 1.12e+03 8.88e-16 1.22e+01 0s 2 2.39957584e+02 -1.70991213e+03 1.05e+02 2.00e-15 1.55e+00 0s 3 1.13174242e+02 -3.78811197e+02 1.40e+01 1.55e-15 2.59e-01 0s 4 7.16877914e+01 -8.43192652e+01 3.19e+00 5.55e-16 6.73e-02 0s 5 5.77195617e+01 -3.79605083e+01 1.86e+00 5.90e-16 3.88e-02 0s 6 4.75634279e+01 -1.22036692e+00 1.09e+00 4.51e-16 1.91e-02 0s 7 3.92380852e+01 1.31744298e+01 4.44e-01 5.01e-16 9.64e-03 0s 8 3.59128528e+01 2.34048318e+01 2.10e-01 4.44e-16 4.51e-03 0s 9 3.40593674e+01 2.96006457e+01 3.87e-02 6.66e-16 1.55e-03 0s 10 3.30504783e+01 3.16324298e+01 2.08e-03 3.35e-16 4.90e-04 0s 11 3.28786128e+01 3.22835259e+01 8.97e-04 4.44e-16 2.05e-04 0s 12 3.27869898e+01 3.25025059e+01 3.55e-04 4.44e-16 9.82e-05 0s 13 3.27645966e+01 3.26197187e+01 1.96e-04 4.44e-16 5.00e-05 0s 14 3.27423675e+01 3.27118389e+01 8.38e-06 4.51e-16 1.05e-05 0s 15 3.27400473e+01 3.27397557e+01 4.08e-14 4.97e-16 1.01e-07 0s 16 3.27400000e+01 3.27399998e+01 1.36e-14 3.33e-16 1.01e-10 0s 17 3.27400000e+01 3.27400000e+01 1.70e-14 4.44e-16 1.01e-13 0s Barrier solved model in 17 iterations and 0.03 seconds Optimal objective 3.27400000e+01 Root relaxation: objective 3.274000e+01, 901 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 32.74000 0 45 64.00000 32.74000 48.8% - 0s H 0 0 35.0000000 32.74000 6.46% - 0s H 0 0 33.0000000 32.74000 0.79% - 0s Explored 0 nodes (1847 simplex iterations) in 0.19 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0% Preprocessing time: 0.06 seconds Gurobi run time: 0.19 seconds Total run time: 0.25 seconds Objective: 33 Solution: 1 x [31, 62] 1 x [8, 12, 18, 62] 1 x [32, 61] 1 x [2, 31, 60] 1 x [10, 24, 60] 1 x [33, 59] 1 x [7, 28, 59] 1 x [35, 58] 1 x [36, 57] 1 x [1, 36, 56] 1 x [19, 21, 56] 1 x [37, 55] 1 x [18, 23, 54] 1 x [3, 36, 53] 1 x [11, 30, 52] 1 x [6, 8, 29, 52] 1 x [12, 17, 18, 52] 1 x [6, 12, 25, 51] 1 x [5, 37, 50] 1 x [1, 14, 27, 50] 1 x [10, 13, 22, 50] 1 x [15, 29, 49] 1 x [10, 34, 48] 1 x [10, 35, 47] 1 x [12, 34, 47] 1 x [5, 39, 46] 1 x [43, 45] 1 x [2, 42, 45] 1 x [44, 44] 1 x [16, 20, 21, 41] 1 x [9, 21, 23, 40] 1 x [4, 32, 38] 1 x [9, 25, 26, 32]