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debugging network simplex

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-12-05 16:31:29 -08:00
parent 192ce11ca6
commit 5fc429c501
6 changed files with 75 additions and 102 deletions
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17
src/smt/theory_diff_logic_def.h
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@ -71,12 +71,7 @@ void theory_diff_logic<Ext>::init(context * ctx) {
zero = m_util.mk_numeral(rational(0), true);
e = ctx->mk_enode(zero, false, false, true);
SASSERT(!is_attached_to_var(e));
m_zero_int = mk_var(e);
zero = m_util.mk_numeral(rational(0), false);
e = ctx->mk_enode(zero, false, false, true);
SASSERT(!is_attached_to_var(e));
m_zero_real = mk_var(e);
m_zero = mk_var(e);
}
@ -356,7 +351,7 @@ final_check_status theory_diff_logic<Ext>::final_check_eh() {
TRACE("arith_final", display(tout); );
// either will already be zero (as we don't do mixed constraints).
m_graph.set_to_zero(m_zero_int, m_zero_real);
m_graph.set_to_zero(m_zero);
SASSERT(is_consistent());
if (m_non_diff_logic_exprs) {
return FC_GIVEUP;
@ -766,8 +761,7 @@ void theory_diff_logic<Ext>::reset_eh() {
dealloc(m_atoms[i]);
}
m_graph .reset();
m_zero_int = null_theory_var;
m_zero_real = null_theory_var;
m_zero = null_theory_var;
m_atoms .reset();
m_asserted_atoms .reset();
m_stats .reset();
@ -1022,10 +1016,9 @@ inf_eps_rational<inf_rational> theory_diff_logic<Ext>::maximize(theory_var v) {
sum += balance;
}
// HACK: assume that v0 is always value 0
if (balances[0].is_zero()) {
balances[0] = -sum;
}
balances[0] = -sum;
TRACE("arith", display(tout););
network_flow<GExt> net_flow(m_graph, balances);
min_flow_result result = net_flow.min_cost();
SASSERT(result != UNBOUNDED);