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updates

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-06-11 13:55:04 -07:00 • committed by Arie Gurfinkel
parent 6e61a7c1b2
commit 44a32bc076
3 changed files with 160 additions and 113 deletions
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49
src/qe/qe_mbi.cpp
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@ -19,12 +19,32 @@ Revision History:
--*/
#include "ast/ast_util.h"
#include "ast/rewriter/bool_rewriter.h"
#include "solver/solver.h"
#include "qe/qe_mbi.h"
namespace qe {
lbool mbi_plugin::check(func_decl_ref_vector const& vars, expr_ref_vector& lits, model_ref& mdl) {
SASSERT(lits.empty());
while (true) {
switch ((*this)(vars, lits, mdl)) {
case mbi_sat:
return l_true;
case mbi_unsat:
if (lits.empty()) return l_false;
block(lits);
break;
case mbi_undef:
return l_undef;
case mbi_augment:
break;
}
}
}
// -------------------------------
// prop_mbi
@ -116,6 +136,7 @@ namespace qe {
blocks.push_back(expr_ref_vector(m));
blocks.push_back(expr_ref_vector(m));
mbi_result last_res = mbi_undef;
bool_rewriter rw(m);
while (true) {
auto* t1 = turn ? &a : &b;
auto* t2 = turn ? &b : &a;
@ -156,10 +177,32 @@ namespace qe {
}
/**
* TBD: also implement the one-sided versions that create clausal interpolants.
* One-sided pogo creates clausal interpolants.
* It creates a set of consequences of b that are inconsistent with a.
*/
lbool interpolator::pogo(mbi_plugin& a, mbi_plugin& b, func_decl_ref_vector const& vars, expr_ref& itp) {
NOT_IMPLEMENTED_YET();
return l_undef;
expr_ref_vector lits(m), itps(m);
while (true) {
model_ref mdl;
lits.reset();
switch (a.check(vars, lits, mdl)) {
case l_true:
switch (b.check(vars, lits, mdl)) {
case l_true:
return l_true;
case l_false:
a.block(lits);
itps.push_back(mk_not(mk_and(lits)));
break;
case l_undef:
return l_undef;
}
case l_false:
itp = mk_and(itps);
return l_false;
case l_undef:
return l_undef;
}
}
}
};