
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 07:04:09 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3999.42.log"
Using license file /Users/sara/gurobi.lic
Academic license - for non-commercial use only - expires 2025-05-12

Gurobi Optimizer version 11.0.1 build v11.0.1rc0 (mac64[x86] - Darwin 21.6.0 21G651)
Copyright (c) 2024, Gurobi Optimization, LLC

Read LP format model from file ./lp_problems/grafo3999.42.lp
Reading time = 0.24 seconds
: 149747 rows, 3025 columns, 452206 nonzeros

CPU model: Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
Thread count: 4 physical cores, 8 logical processors, using up to 8 threads

Optimize a model with 149747 rows, 3025 columns and 452206 nonzeros
Model fingerprint: 0x4cc181d0
Variable types: 58 continuous, 2967 integer (2967 binary)
Coefficient statistics:
  Matrix range     [5e-01, 5e+01]
  Objective range  [1e+00, 1e+00]
  Bounds range     [1e+00, 1e+00]
  RHS range        [1e+00, 6e+01]
Found heuristic solution: objective -0.0000000
Presolve removed 37808 rows and 0 columns
Presolve time: 0.90s
Presolved: 111939 rows, 3025 columns, 339340 nonzeros
Variable types: 0 continuous, 3025 integer (2967 binary)
Found heuristic solution: objective 8.0000000
Root relaxation presolved: 2998 rows, 114937 columns, 342365 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   16782    7.7657580e+01   0.000000e+00   1.176019e+05      5s
   34212    7.4597706e+01   0.000000e+00   1.902224e+05     10s
   50645    7.4581739e+01   0.000000e+00   3.283326e+04     15s
   67963    7.4573729e+01   0.000000e+00   4.069635e+03     20s
   84835    7.4570974e+01   0.000000e+00   6.055595e+02     25s
   98309    7.5000000e+01   0.000000e+00   0.000000e+00     29s
   98309    7.5000000e+01   0.000000e+00   0.000000e+00     29s
   98309    7.5000000e+01   0.000000e+00   0.000000e+00     29s

Root relaxation: objective 7.500000e+01, 98309 iterations, 27.99 seconds (22.84 work units)

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   75.00000    0 1948    8.00000   75.00000   838%     -   50s

Explored 1 nodes (107915 simplex iterations) in 50.04 seconds (43.89 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 8 -0 

Time limit reached
Best objective 8.000000000000e+00, best bound 7.500000000000e+01, gap 837.5000%

Wrote result file './lp_solutions/grafo3999.42.sol'

