
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 05:46:05 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo7639.40.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/grafo7639.40.lp
Reading time = 0.22 seconds
: 137475 rows, 2185 columns, 414218 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 137475 rows, 2185 columns and 414218 nonzeros
Model fingerprint: 0x5e78c5df
Variable types: 45 continuous, 2140 integer (2140 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 1.0000000
Presolve removed 49897 rows and 8 columns
Presolve time: 0.86s
Presolved: 87578 rows, 2177 columns, 264757 nonzeros
Variable types: 0 continuous, 2177 integer (2132 binary)
Found heuristic solution: objective 7.0000000
Root relaxation presolved: 2170 rows, 89748 columns, 266934 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25668    5.4832727e+01   0.000000e+00   1.133401e+04      5s
   44490    5.5000000e+01   0.000000e+00   0.000000e+00      9s
   44490    5.5000000e+01   0.000000e+00   0.000000e+00      9s
   44490    5.5000000e+01   0.000000e+00   0.000000e+00      9s

Root relaxation: objective 5.500000e+01, 44490 iterations, 7.58 seconds (5.99 work units)
Total elapsed time = 20.06s (DegenMoves)
Total elapsed time = 37.94s (DegenMoves)
Total elapsed time = 41.78s (DegenMoves)

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

     0     0   55.00000    0  352    7.00000   55.00000   686%     -   44s
H    0     0                       9.0000000   55.00000   511%     -   44s
     0     0          -    0         9.00000   55.00000   511%     -   50s

Cutting planes:
  Gomory: 25
  Cover: 53
  Clique: 26
  MIR: 284
  GUB cover: 2
  Zero half: 54
  RLT: 81
  BQP: 2

Explored 1 nodes (79096 simplex iterations) in 50.02 seconds (66.32 work units)
Thread count was 8 (of 8 available processors)

Solution count 3: 9 7 1 

Time limit reached
Best objective 9.000000000000e+00, best bound 5.500000000000e+01, gap 511.1111%

Wrote result file './lp_solutions/grafo7639.40.sol'

