[Scip] Add and delete variable in probing

[Jonas Witt]

Hi all,

I want to change the rhs/lhs of some constraints during probing (it has 
to be probing not diving!). Since this is not possible, I would like to 
add a new variable to each constraint which I want to change. Then I 
want to fix this variable in probing mode via SCIPfixVarProbing(), which 
implicitly changes the rhs and lhs of the constraint. In the end I want 
to solve the probing LP, exit the probing mode and delete the created 
variables.

How can I achieve this? Should I mark the variables to be deletable by 
SCIPvarMarkDeletable() and add the variables to the problem during 
probing in order to automatically delete the variables after the probing 
node was processed?

Best regards,
Jonas