
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 02:53:10 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo3888.38.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/grafo3888.38.lp
Reading time = 0.37 seconds
: 222083 rows, 2376 columns, 668427 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 222083 rows, 2376 columns and 668427 nonzeros
Model fingerprint: 0xe79a9470
Variable types: 49 continuous, 2327 integer (2327 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, 5e+01]
Found heuristic solution: objective -0.0000000
Presolve removed 92701 rows and 15 columns
Presolve time: 1.61s
Presolved: 129382 rows, 2361 columns, 390748 nonzeros
Variable types: 0 continuous, 2361 integer (2312 binary)
Found heuristic solution: objective 9.0000000
Root relaxation presolved: 2352 rows, 131734 columns, 393109 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   17065    8.6855609e+01   0.000000e+00   3.992958e+05      5s
   38451    5.9776838e+01   0.000000e+00   5.462728e+04     10s
   62224    5.9732414e+01   0.000000e+00   1.426504e+04     15s
   86025    5.9723832e+01   0.000000e+00   4.898332e+02     20s
   97537    6.0000000e+01   0.000000e+00   0.000000e+00     23s
   97537    6.0000000e+01   0.000000e+00   0.000000e+00     23s
   97537    6.0000000e+01   0.000000e+00   0.000000e+00     23s

Root relaxation: objective 6.000000e+01, 97537 iterations, 20.82 seconds (15.95 work units)

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

     0     0   60.00000    0 1475    9.00000   60.00000   567%     -   50s

Explored 1 nodes (111261 simplex iterations) in 50.05 seconds (45.10 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 -0 

Time limit reached
Best objective 9.000000000000e+00, best bound 6.000000000000e+01, gap 566.6667%

Wrote result file './lp_solutions/grafo3888.38.sol'

