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add option to control epsilon #7791

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#7791 reports on using model values during lex optimization that break soft constraints.
This is an artifact of using optimization where optimal values can be arbitrarily close to a rational.
In a way it is by design, but we give the user now an option to control the starting point for epsilon when converting infinitesimals into rationals.
This commit is contained in:
Nikolaj Bjorner 2025-08-17 16:47:23 -07:00
parent d8bf0e047f
commit c75b8ec752
7 changed files with 14 additions and 4 deletions
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src/smt/theory_arith_core.h
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@ -3174,7 +3174,8 @@ namespace smt {
template<typename Ext>
void theory_arith<Ext>::compute_epsilon() {
m_epsilon = numeral(1);
auto eps = ctx.get_fparams().m_arith_epsilon;
m_epsilon = numeral(eps);
theory_var num = get_num_vars();
for (theory_var v = 0; v < num; v++) {
bound * l = lower(v);