scipopt/scip v924

v9.2.4

on GitHub

Fixed bugs

• fixed bugs with counting changes in presolving of nonlinear and setppc constraints, which resulted in negative values
• cut off dead end node to correctly track dual bound update during solving
• no longer construct and flush the LP in SCIPwriteLP() and SCIPwriteMIP() to avoid unexpected side effects
• apply multi-aggregations before detecting redundancy in propagation of varbound constraints to keep bound implications
• skip bound changes when cutting off a branch-and-bound subtree
• correct detection of doublelex matrices and their handling via orbitope constraints
• skip attempting to free transformed problem if SCIPtransformProb() failed with an error in SCIPpresolve(), since freeing the transformed problem is likely to fail as well
• fixed memory leak in primal heuristic "scheduler" when there is a restart
• fixed stopping when there is a candidate with a change in the LP bound for both children in strong branching of branch_fullstrong
• fixed detection of sinks in varbound detection from cumulative constraints
• fixed memory allocation when adding strong SBCs for enclosing orbit of symmetric subgroups (disabled by default)
• free paths of branch-and-bound tree iteratively instead of recursively to avoid stack overflow
• fixed rare invalid memory access when collecting symmetry information for indicator constraints
• recompute activity bounds before checking infeasibility and redundancy in linear constraint presolving
• skip integer variables with fractional value in reference solution when finding additional variable fixings in ALNS heuristic
• fix call of SCIPaddExprsViolScoreNonlinear() with constant expressions (no variables)
• fixed bug with concurrent solve w.r.t. variable indices that led to segmentation faults and fix termination test
• adjust further bounds before checking feasibility in SCIPvarAddVlb() and SCIPvarAddVub() to detect integrality cutoff
• fixed that the last fixed binary variable was not set after binary variables were created for linking constraints
• fixed that when a linking constraint with only one binary variable was added during solving, it was not disabled
• fixed set_search_limits() call when using SYM=sbliss with an old patched Bliss version

Build system

CMake

• added workaround for recent ctest versions rejecting -R -default as arguments

Makefile

• added experimental target to run cppcheck