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Mehrotra bug? #66

Description

@sshin23

MWE:

julia> begin
       using MIPLIB, MadIPM
       m = MIPLIB.miplib2010("atlanta-ip.mps.gz"); 
       madipm(m; linear_solver=LDLSolver)
       end
[ Info: Using 'atlanta-ip' as NAME (l. 1)
[ Info: Using 'obj' as objective (l. 3)
[ Info: Using 'rhs' as RHS (l. 181171)
[ Info: Using 'bnd' as BOUNDS (l. 186358)
This is MadIPM, running with LDLFactorizations v0.10.1

iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr
   0  8.1421012e+00 9.90e-01 1.46e-01  -1.0 0.00e+00   0.0 0.00e+00 0.00e+00
   1  2.5854607e+01 1.01e+06 1.46e-01   6.7 1.43e+10 -10.0 1.10e-19 2.62e-17
   2  2.5854607e+01 1.01e+06 1.46e-01   6.7 1.10e+09 -10.0 8.67e-17 6.75e-18
   3  2.5854607e+01 1.01e+06 1.46e-01   6.7 1.10e+09 -10.0 4.31e-18 1.17e-17
   4  2.5854607e+01 1.01e+06 1.46e-01   6.7 1.10e+09 -10.0 1.74e-18 6.36e-17

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