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no calling cut_solver when there are bounded columns
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>
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@ -38,6 +38,8 @@ namespace smt {
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st.update("arith gcd tests", m_stats.m_gcd_tests);
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st.update("arith ineq splits", m_stats.m_branches);
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st.update("arith gomory cuts", m_stats.m_gomory_cuts);
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st.update("arith patches", m_stats.m_patches);
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st.update("arith patches_succ", m_stats.m_patches_succ);
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st.update("arith max-min", m_stats.m_max_min);
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st.update("arith grobner", m_stats.m_gb_compute_basis);
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st.update("arith pseudo nonlinear", m_stats.m_nl_linear);
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