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add get-interpolant command

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-01-19 12:12:04 -06:00
parent d3b105f9f8
commit 9179deb746
5 changed files with 127 additions and 32 deletions
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6
src/math/polynomial/algebraic_numbers.cpp
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@ -1839,9 +1839,11 @@ namespace algebraic_numbers {
m_compare_sturm++;
upolynomial::scoped_upolynomial_sequence seq(upm());
upm().sturm_tarski_seq(cell_a->m_p_sz, cell_a->m_p, cell_b->m_p_sz, cell_b->m_p, seq);
int V = upm().sign_variations_at(seq, a_lower) - upm().sign_variations_at(seq, a_upper);
unsigned V1 = upm().sign_variations_at(seq, a_lower);
unsigned V2 = upm().sign_variations_at(seq, a_upper);
int V = V1 - V2;
TRACE("algebraic", tout << "comparing using sturm\n"; display_interval(tout, a); tout << "\n"; display_interval(tout, b); tout << "\n";
tout << "V: " << V << ", sign_lower(a): " << sign_lower(cell_a) << ", sign_lower(b): " << sign_lower(cell_b) << "\n";);
tout << "V: " << V << " V1 " << V1 << " V2 " << V2 << " sign_lower(a): " << sign_lower(cell_a) << ", sign_lower(b): " << sign_lower(cell_b) << "\n";);
if (V == 0)
return sign_zero;
if ((V < 0) == (sign_lower(cell_b) < 0))