Gurobi reports the initial solution to violate a certain constraint by a certain amount:
However, I doubled checked by hand calculations and am sure this is not true. can you help me find the cause?
Here is the message I get:
Optimize a model with 166177 rows, 103968 columns and 18307840 nonzeros
Variable types: 432 continuous, 103536 integer (103536 binary)
Coefficient statistics:
Matrix range [3e-06, 2e+02]
Objective range [1e+00, 1e+00]
Bounds range [1e+00, 1e+00]
RHS range [1e+00, 5e+01]
MIP start did not produce a new incumbent solution
MIP start violates constraint R1154 by 0.152632104
I am attaching the problem files:
The constraint matrix A.zip
rhs bs.zip
variable types vtype.zip
constraints senses Ctype.zip
my initial solution sols.zip
and I attach here the python script I am using.
All matrices are in Matlab mat format
I am also providing a link to the mps version of the model