fn complete_fallback_support_model(
constraints: &[SymBoolExpr],
model: &mut HashMap<Symbol, U256>,
remaining_support_visits: &mut usize,
) -> boolfn complete_fallback_support_model(
constraints: &[SymBoolExpr],
model: &mut HashMap<Symbol, U256>,
remaining_support_visits: &mut usize,
) -> bool