![]() It can be disabled setting the new control PRECONFIGURATION=0. The presolver drops each applicable original row in favor of a tighter formulation with new binary variables and rows modeling the choice between extremal feasible configurations of the original variables. ![]() The new configuration presolver attempts to reformulate binary rows with very few coefficients.This heuristic is called "feasibility jump" and can be controlled with the FEASIBILITYJUMP control (0=off, 1=on (default)). Solutions found by this heuristic are marked by the letter 'P' in the log. A new heuristic was introduced to run at the root node parallel to the cut loop.The separation of these cuts can be disabled through the controls CUTSELECT and TREECUTSELECT. The separation of cutting planes from Farkas infeasibility proofs has been introduced. ![]() The separation of Strong Chvatal-Gomory cutting planes has been introduced. Separation of Strong Chvatal-Gomory cuts.Improved branching strategies on MIP models with highly degenerate objective function. ![]() The threshold used to determine if a pseudo cost is reliable is now dynamically adjusted during the solve, to favor a better control of the computational effort spent in strong branching. By default, strong branching is performed only on infeasible MIP entities whose pseudo costs is considered unreliable.
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