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working on pdr

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2012-10-14 11:13:36 -07:00
parent 990b93c2fd
commit bf0481c4d0
5 changed files with 236 additions and 193 deletions
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25
lib/pdr_generalizers.cpp
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@ -99,31 +99,26 @@ namespace pdr {
}
ast_manager& m = core.get_manager();
TRACE("pdr", for (unsigned i = 0; i < core.size(); ++i) { tout << mk_pp(core[i].get(), m) << "\n"; } "\n";);
unsigned num_failures = 0, i = 0, num_changes = 0;
unsigned num_failures = 0, i = 0, old_core_size = core.size();
ptr_vector<expr> processed;
while (i < core.size() && 1 < core.size() && (!m_failure_limit || num_failures <= m_failure_limit)) {
expr_ref lit(m), state(m);
expr_ref lit(m);
lit = core[i].get();
core[i] = m.mk_true();
state = m.mk_not(n.pt().get_pdr_manager().mk_and(core));
bool uses_level_tmp = false;
if (n.pt().is_invariant(n.level(), state, true, uses_level_tmp, 0)) {
core[i] = m.mk_true();
if (n.pt().check_inductive(n.level(), core, uses_level)) {
num_failures = 0;
core[i] = core.back();
core.pop_back();
TRACE("pdr", tout << "Remove: " << mk_pp(lit, m) << "\n";);
IF_VERBOSE(3, verbose_stream() << "remove: " << mk_pp(lit, m) << "\n";);
++num_changes;
uses_level = uses_level_tmp;
for (i = 0; i < core.size() && processed.contains(core[i].get()); ++i);
}
else {
IF_VERBOSE(3, verbose_stream() << "keep: " << mk_pp(lit, m) << "\n";);
core[i] = lit;
processed.push_back(lit);
++num_failures;
++i;
}
}
IF_VERBOSE(2, verbose_stream() << "changes: " << num_changes << " size: " << core.size() << "\n";);
TRACE("pdr", tout << "changes: " << num_changes << " index: " << i << " size: " << core.size() << "\n";);
IF_VERBOSE(2, verbose_stream() << "old size: " << old_core_size << " new size: " << core.size() << "\n";);
TRACE("pdr", tout << "old size: " << old_core_size << " new size: " << core.size() << "\n";);
}
//