Controls aggressiveness of Optimality-Based Bound Tightening
  Type: int
  Default value: -1
  Minimum value: -1
  Maximum value: 3

Value 0 disables Optimality-Based Bound Tightening (OBBT). Levels 1-3 describe the amount of work allowed for OBBT ranging from moderate to aggressive. The default -1 value is an automatic setting which chooses a rather moderate setting.

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