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Code Activity

no calling cut_solver when there are bounded columns

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

use special bounds inf find_cube for x+y, x-y

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

bug fixes in column patching, add stats to patching, restructure int_solver

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

comment out m_old_values from int_solver

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

avoid calling pivot_fixed_vars_from_basis() in int_solver

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

fix the return value from path_nbasic_columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

fix the return value from path_nbasic_columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

work in patch_columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

work on int_solver check()

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

exit from find_free_interval() when l >= u

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

experiment with branching on nbasic columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

remove m_old_values

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

add rounding to patch_columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

qflia

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

patch all columns, round non-patched, branch or basic columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

refactor int_solver::check()

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

restore  move_non_basic_columns_to_bounds() after a failure in find_cube()

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

optimize gomory cuts search

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

produce gomory cuts without moving columns to bounds

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

call find_feasible_solution() after moving columns

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

alway move colums to bounds before gomory cut

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

merge from best branch

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2018-04-03 17:29:58 -07:00
parent 7e82ab595e
commit c04bcb411d
13 changed files with 341 additions and 276 deletions
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2
src/smt/theory_arith_pp.h
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@ -38,6 +38,8 @@ namespace smt {
st.update("arith gcd tests", m_stats.m_gcd_tests);
st.update("arith ineq splits", m_stats.m_branches);
st.update("arith gomory cuts", m_stats.m_gomory_cuts);
st.update("arith patches", m_stats.m_patches);
st.update("arith patches_succ", m_stats.m_patches_succ);
st.update("arith max-min", m_stats.m_max_min);
st.update("arith grobner", m_stats.m_gb_compute_basis);
st.update("arith pseudo nonlinear", m_stats.m_nl_linear);