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bug fixes to LUT extraction, bug fix for real value case of freedom intervals

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-02-11 14:25:16 -08:00
parent 806ee85759
commit c46e36ce58
9 changed files with 38 additions and 17 deletions
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4
src/math/lp/int_solver.cpp
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@ -513,12 +513,12 @@ bool int_solver::shift_var(unsigned j, unsigned range) {
}
SASSERT(!inf_l && !inf_u);
mpq r = floor((u.x - l.x) / m);
mpq r = floor((u - l) / m);
if (r < mpq(range)) range = static_cast<unsigned>(r.get_uint64());
// the interval contains at least range multiples of m.
// the number of multiples to the left of the value of j is floor((get_value(j) - l.x)/m)
// shift either left or right of the current value by available multiples.
impq shift = impq(random() % (range + 1)) - impq(floor((x.x - l.x) / m));
impq shift = impq(random() % (range + 1)) - impq(floor((x - l) / m));
impq new_val = x + m * shift;
SASSERT(l <= new_val && new_val <= u);
set_value_for_nbasic_column_ignore_old_values(j, new_val); return true;