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Merge branch 'unstable' of https://git01.codeplex.com/z3 into unstable

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This commit is contained in:
Leonardo de Moura 2012-11-18 00:14:08 -08:00
commit 8f2a17e20b
63 changed files with 1756 additions and 1444 deletions
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154
src/api/api_datalog.cpp
View file

@ -26,6 +26,9 @@ Revision History:
#include"datalog_parser.h"
#include"cancel_eh.h"
#include"scoped_timer.h"
#include"dl_cmds.h"
#include"cmd_context.h"
#include"smt2parser.h"
namespace api {
@ -124,55 +127,6 @@ namespace api {
return str.str();
}
void fixedpoint_context::simplify_rules(
unsigned num_rules, expr* const* rules,
unsigned num_outputs, func_decl* const* outputs, expr_ref_vector& result) {
ast_manager& m = m_context.get_manager();
datalog::context ctx(m, m_context.get_fparams());
for (unsigned i = 0; i < num_rules; ++i) {
expr* rule = rules[i], *body, *head;
while (true) {
if (is_quantifier(rule)) {
rule = to_quantifier(rule)->get_expr();
}
else if (m.is_implies(rule, body, head)) {
rule = head;
}
else {
break;
}
}
if (is_app(rule)) {
func_decl* r = to_app(rule)->get_decl();
if (!ctx.is_predicate(r)) {
ctx.register_predicate(r);
if (num_outputs == 0) {
ctx.set_output_predicate(r);
}
}
}
}
for (unsigned i = 0; i < num_outputs; ++i) {
ctx.set_output_predicate(outputs[i]);
}
for (unsigned i = 0; i < num_rules; ++i) {
expr* rule = rules[i];
ctx.add_rule(rule, symbol::null);
}
model_converter_ref mc; // not exposed.
proof_converter_ref pc; // not exposed.
ctx.apply_default_transformation(mc, pc);
datalog::rule_set const& new_rules = ctx.get_rules();
datalog::rule_set::iterator it = new_rules.begin(), end = new_rules.end();
for (; it != end; ++it) {
datalog::rule* r = *it;
expr_ref fml(m);
r->to_formula(fml);
result.push_back(fml);
}
}
};
extern "C" {
@ -384,6 +338,62 @@ extern "C" {
Z3_CATCH_RETURN("");
}
Z3_ast_vector Z3_fixedpoint_from_stream(
Z3_context c,
Z3_fixedpoint d,
std::istream& s) {
ast_manager& m = mk_c(c)->m();
dl_collected_cmds coll(m);
cmd_context ctx(&mk_c(c)->fparams(), false, &m);
install_dl_collect_cmds(coll, ctx);
ctx.set_ignore_check(true);
if (!parse_smt2_commands(ctx, s)) {
SET_ERROR_CODE(Z3_PARSER_ERROR);
return 0;
}
Z3_ast_vector_ref* v = alloc(Z3_ast_vector_ref, m);
mk_c(c)->save_object(v);
for (unsigned i = 0; i < coll.m_queries.size(); ++i) {
v->m_ast_vector.push_back(coll.m_queries[i].get());
}
for (unsigned i = 0; i < coll.m_rels.size(); ++i) {
to_fixedpoint_ref(d)->ctx().register_predicate(coll.m_rels[i].get());
}
for (unsigned i = 0; i < coll.m_rules.size(); ++i) {
to_fixedpoint_ref(d)->add_rule(coll.m_rules[i].get(), coll.m_names[i]);
}
return of_ast_vector(v);
}
Z3_ast_vector Z3_API Z3_fixedpoint_from_string(
Z3_context c,
Z3_fixedpoint d,
Z3_string s) {
Z3_TRY;
LOG_Z3_fixedpoint_from_string(c, d, s);
std::string str(s);
std::istringstream is(str);
RETURN_Z3(Z3_fixedpoint_from_stream(c, d, is));
Z3_CATCH_RETURN(0);
}
Z3_ast_vector Z3_API Z3_fixedpoint_from_file(
Z3_context c,
Z3_fixedpoint d,
Z3_string s) {
Z3_TRY;
LOG_Z3_fixedpoint_from_file(c, d, s);
std::ifstream is(s);
if (!is) {
SET_ERROR_CODE(Z3_PARSER_ERROR);
RETURN_Z3(0);
}
RETURN_Z3(Z3_fixedpoint_from_stream(c, d, is));
Z3_CATCH_RETURN(0);
}
Z3_stats Z3_API Z3_fixedpoint_get_statistics(Z3_context c,Z3_fixedpoint d) {
Z3_TRY;
LOG_Z3_fixedpoint_get_statistics(c, d);
@ -419,6 +429,27 @@ extern "C" {
Z3_CATCH;
}
Z3_ast_vector Z3_API Z3_fixedpoint_get_rules(
Z3_context c,
Z3_fixedpoint d)
{
Z3_TRY;
LOG_Z3_fixedpoint_get_rules(c, d);
ast_manager& m = mk_c(c)->m();
Z3_ast_vector_ref* v = alloc(Z3_ast_vector_ref, m);
mk_c(c)->save_object(v);
datalog::rule_set const& rules = to_fixedpoint_ref(d)->ctx().get_rules();
datalog::rule_set::iterator it = rules.begin(), end = rules.end();
for (; it != end; ++it) {
expr_ref fml(m);
(*it)->to_formula(fml);
v->m_ast_vector.push_back(fml);
}
RETURN_Z3(of_ast_vector(v));
Z3_CATCH_RETURN(0);
}
void Z3_API Z3_fixedpoint_set_reduce_assign_callback(
Z3_context c, Z3_fixedpoint d, Z3_fixedpoint_reduce_assign_callback_fptr f) {
Z3_TRY;
@ -435,31 +466,6 @@ extern "C" {
Z3_CATCH;
}
Z3_ast_vector Z3_API Z3_fixedpoint_simplify_rules(
Z3_context c,
Z3_fixedpoint d,
unsigned num_rules,
Z3_ast _rules[],
unsigned num_outputs,
Z3_func_decl _outputs[]) {
Z3_TRY;
LOG_Z3_fixedpoint_simplify_rules(c, d, num_rules, _rules, num_outputs, _outputs);
RESET_ERROR_CODE();
expr** rules = (expr**)_rules;
func_decl** outputs = (func_decl**)_outputs;
ast_manager& m = mk_c(c)->m();
expr_ref_vector result(m);
to_fixedpoint_ref(d)->simplify_rules(num_rules, rules, num_outputs, outputs, result);
Z3_ast_vector_ref* v = alloc(Z3_ast_vector_ref, mk_c(c)->m());
mk_c(c)->save_object(v);
for (unsigned i = 0; i < result.size(); ++i) {
v->m_ast_vector.push_back(result[i].get());
}
RETURN_Z3(of_ast_vector(v));
Z3_CATCH_RETURN(0)
}
void Z3_API Z3_fixedpoint_init(Z3_context c,Z3_fixedpoint d, void* state) {
Z3_TRY;
// not logged

3
src/api/api_datalog.h
View file

@ -62,9 +62,6 @@ namespace api {
void collect_param_descrs(param_descrs & p) { m_context.collect_params(p); }
void updt_params(params_ref const& p) { m_context.updt_params(p); }
void simplify_rules(
unsigned num_rules, expr* const* rules,
unsigned num_outputs, func_decl* const* outputs, expr_ref_vector& result);
};
};

17
src/api/dotnet/Fixedpoint.cs
View file

@ -261,6 +261,23 @@ namespace Microsoft.Z3
AST.ArrayLength(queries), AST.ArrayToNative(queries));
}
/// <summary>
/// Retrieve set of rules added to fixedpoint context.
/// </summary>
public BoolExpr[] Rules {
get
{
Contract.Ensures(Contract.Result<BoolExpr[]>() != null);
ASTVector v = new ASTVector(Context, Native.Z3_fixedpoint_get_rules(Context.nCtx, NativeObject));
uint n = v.Size;
BoolExpr[] res = new BoolExpr[n];
for (uint i = 0; i < n; i++)
res[i] = new BoolExpr(Context, v[i].NativeObject);
return res;
}
}
#region Internal
internal Fixedpoint(Context ctx, IntPtr obj)

4
src/api/dotnet/Properties/AssemblyInfo.cs
View file

@ -34,6 +34,6 @@ using System.Security.Permissions;
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("4.2.0.0")]
[assembly: AssemblyVersion("4.3.1.0")]
[assembly: AssemblyFileVersion("4.3.1.0")]
[assembly: AssemblyVersion("4.3.2.0")]
[assembly: AssemblyFileVersion("4.3.2.0")]

42
src/api/python/z3.py
View file

@ -49,6 +49,22 @@ def enable_trace(msg):
def disable_trace(msg):
Z3_disable_trace(msg)
def get_version_string():
major = ctypes.c_uint(0)
minor = ctypes.c_uint(0)
build = ctypes.c_uint(0)
rev = ctypes.c_uint(0)
Z3_get_version(major, minor, build, rev)
return "%s.%s.%s" % (major.value, minor.value, build.value)
def get_version():
major = ctypes.c_uint(0)
minor = ctypes.c_uint(0)
build = ctypes.c_uint(0)
rev = ctypes.c_uint(0)
Z3_get_version(major, minor, build, rev)
return (major.value, minor.value, build.value, rev.value)
# We use _z3_assert instead of the assert command because we want to
# produce nice error messages in Z3Py at rise4fun.com
def _z3_assert(cond, msg):
@ -6102,7 +6118,6 @@ class Fixedpoint(Z3PPObject):
"""Add property to predicate for the level'th unfolding. -1 is treated as infinity (infinity)"""
Z3_fixedpoint_add_cover(self.ctx.ref(), self.fixedpoint, level, predicate.ast, property.ast)
def register_relation(self, *relations):
"""Register relation as recursive"""
relations = _get_args(relations)
@ -6119,16 +6134,35 @@ class Fixedpoint(Z3PPObject):
args[i] = representations[i]
Z3_fixedpoint_set_predicate_representation(self.ctx.ref(), self.fixedpoint, f.ast, sz, args)
def parse_string(self, s):
"""Parse rules and queries from a string"""
return AstVector(Z3_fixedpoint_from_string(self.ctx.ref(), self.fixedpoint, s), self.ctx)
def parse_file(self, f):
"""Parse rules and queries from a file"""
return AstVector(Z3_fixedpoint_from_file(self.ctx.ref(), self.fixedpoint, f), self.ctx)
def get_rules(self):
"""retrieve rules that have been added to fixedpoint context"""
return AstVector(Z3_fixedpoint_get_rules(self.ctx.ref(), self.fixedpoint), self.ctx)
def __repr__(self):
"""Return a formatted string with all added rules and constraints."""
return self.sexpr()
def sexpr(self):
"""Return a formatted string (in Lisp-like format) with all added constraints. We say the string is in s-expression format.
"""Return a formatted string (in Lisp-like format) with all added constraints. We say the string is in s-expression format.
"""
return Z3_fixedpoint_to_string(self.ctx.ref(), self.fixedpoint, 0, (Ast * 0)())
return Z3_fixedpoint_to_string(self.ctx.ref(), self.fixedpoint, 0, (Ast * 0)())
def to_string(self, queries):
"""Return a formatted string (in Lisp-like format) with all added constraints.
We say the string is in s-expression format.
Include also queries.
"""
args, len = _to_ast_array(queries)
return Z3_fixedpoint_to_string(self.ctx.ref(), self.fixedpoint, len, args)
def statistics(self):
"""Return statistics for the last `query()`.
"""

48
src/api/z3_api.h
View file

@ -5688,19 +5688,13 @@ END_MLAPI_EXCLUDE
__in_ecount(num_relations) Z3_symbol const relation_kinds[]);
/**
\brief Simplify rules into a set of new rules that are returned.
The simplification routines apply inlining, quantifier elimination, and other
algebraic simplifications.
\brief Retrieve set of rules from fixedpoint context.
def_API('Z3_fixedpoint_simplify_rules', AST_VECTOR, (_in(CONTEXT), _in(FIXEDPOINT), _in(UINT), _in_array(2,AST), _in(UINT), _in_array(4,FUNC_DECL)))
*/
Z3_ast_vector Z3_API Z3_fixedpoint_simplify_rules(
def_API('Z3_fixedpoint_get_rules', AST_VECTOR, (_in(CONTEXT),_in(FIXEDPOINT)))
*/
Z3_ast_vector Z3_API Z3_fixedpoint_get_rules(
__in Z3_context c,
__in Z3_fixedpoint f,
__in unsigned num_rules,
__in_ecount(num_rules) Z3_ast rules[],
__in unsigned num_outputs,
__in_ecount(num_outputs) Z3_func_decl outputs[]);
__in Z3_fixedpoint f);
/**
\brief Set parameters on fixedpoint context.
@ -5738,6 +5732,38 @@ END_MLAPI_EXCLUDE
__in unsigned num_queries,
__in_ecount(num_queries) Z3_ast queries[]);
/**
\brief Parse an SMT-LIB2 string with fixedpoint rules.
Add the rules to the current fixedpoint context.
Return the set of queries in the file.
\param c - context.
\param f - fixedpoint context.
\param s - string containing SMT2 specification.
def_API('Z3_fixedpoint_from_string', AST_VECTOR, (_in(CONTEXT), _in(FIXEDPOINT), _in(STRING)))
*/
Z3_ast_vector Z3_API Z3_fixedpoint_from_string(
__in Z3_context c,
__in Z3_fixedpoint f,
__in Z3_string s);
/**
\brief Parse an SMT-LIB2 file with fixedpoint rules.
Add the rules to the current fixedpoint context.
Return the set of queries in the file.
\param c - context.
\param f - fixedpoint context.
\param s - string containing SMT2 specification.
def_API('Z3_fixedpoint_from_file', AST_VECTOR, (_in(CONTEXT), _in(FIXEDPOINT), _in(STRING)))
*/
Z3_ast_vector Z3_API Z3_fixedpoint_from_file(
__in Z3_context c,
__in Z3_fixedpoint f,
__in Z3_string s);
/**
\brief Create a backtracking point.

516
src/ast/ast_pp.cpp
View file

@ -1,516 +0,0 @@
/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
ast_pp.cpp
Abstract:
Expression DAG pretty printer
Author:
Leonardo de Moura 2008-01-20.
Revision History:
--*/
#include"ast_pp.h"
#include"pp.h"
#include"obj_pair_hashtable.h"
#include"ast_ll_pp.h"
#include"arith_decl_plugin.h"
#include"bv_decl_plugin.h"
#include"datatype_decl_plugin.h"
#include"dl_decl_plugin.h"
#include"ast_list.h"
#include<sstream>
using namespace format_ns;
mk_pp::mk_pp(ast * a, ast_manager & m, pp_params const & p, unsigned indent, unsigned num_var_names, char const * const * var_names):
m_ast(a),
m_manager(m),
m_params(p),
m_indent(indent),
m_num_var_names(num_var_names),
m_var_names(var_names) {
}
mk_pp::mk_pp(ast * a, ast_manager & m, unsigned indent, unsigned num_var_names, char const * const * var_names):
m_ast(a),
m_manager(m),
m_params(get_pp_default_params()),
m_indent(indent),
m_num_var_names(num_var_names),
m_var_names(var_names) {
}
std::ostream & ast_pp(std::ostream & strm, ast * n, ast_manager & m) {
return ast_pp(strm, n, m, get_pp_default_params());
}
struct pp_cache {
typedef obj_pair_map<ast, quantifier_list, format *> cache;
ast_manager & m_manager;
cache m_cache;
pp_cache(ast_manager & m):
m_manager(m) {
}
~pp_cache() {
reset();
}
bool contains(ast * k1, quantifier_list * k2) const { return m_cache.contains(k1, k2); }
void get(ast * k1, quantifier_list * k2, format * & r) const { m_cache.find(k1, k2, r); }
void insert(ast * k1, quantifier_list * k2, format * f) {
SASSERT(!m_cache.contains(k1, k2));
fm(m_manager).inc_ref(f);
m_cache.insert(k1, k2, f);
}
void reset() {
cache::iterator it = m_cache.begin();
cache::iterator end = m_cache.end();
for (; it != end; ++it) {
format * f = (*it).get_value();
fm(m_manager).dec_ref(f);
}
m_cache.reset();
}
};
class formatter {
typedef quantifier_list_manager qlist_manager;
typedef quantifier_list_ref qlist_ref;
typedef quantifier_list_ref_vector qlist_ref_vector;
pp_params const & m_params;
ast_manager & m_manager;
qlist_manager m_qlist_manager;
pp_cache m_cache;
typedef std::pair<ast*, quantifier_list*> pp_entry;
svector<pp_entry> m_todo;
qlist_ref_vector m_qlists;
app_ref m_nil;
arith_util m_autil;
bv_util m_bvutil;
datatype_util m_datatype_util;
datalog::dl_decl_util m_dl_util;
ptr_vector<sort> m_datatypes;
app_ref_vector m_format_trail;
ast_mark m_visited_datatypes;
unsigned m_num_var_names;
char const * const * m_var_names;
struct symbol2format {
ast_manager & m_manager;
symbol2format(ast_manager & m):m_manager(m) {}
format * operator()(symbol const & s) {
std::string str = s.str();
return mk_string(m_manager, str.c_str());
}
};
format * get_cached(ast * n, quantifier_list * qlist) {
format * f = 0;
if (is_sort(n)) {
qlist = m_qlist_manager.mk_nil();
}
m_cache.get(n, qlist, f);
SASSERT(f);
return f;
}
void visit(ast * n, quantifier_list * qlist, bool & visited) {
if (is_sort(n)) {
qlist = m_qlist_manager.mk_nil();
}
if (!m_cache.contains(n, qlist)) {
m_todo.push_back(pp_entry(n, qlist));
visited = false;
}
}
bool visit_children(ast * n, quantifier_list * qlist) {
unsigned j;
bool visited = true;
switch (n->get_kind()) {
case AST_FUNC_DECL: {
func_decl* f = to_func_decl(n);
j = f->get_arity();
while (j > 0) {
--j;
visit(f->get_domain(j), qlist, visited);
}
visit(f->get_range(), qlist, visited);
j = f->get_num_parameters();
while (j > 0) {
--j;
parameter p(f->get_parameter(j));
if (p.is_ast()) {
visit(p.get_ast(), qlist, visited);
}
}
break;
}
case AST_SORT: {
sort* s = to_sort(n);
j = s->get_num_parameters();
while (j > 0) {
--j;
parameter p(s->get_parameter(j));
if (p.is_ast()) {
visit(p.get_ast(), qlist, visited);
}
}
break;
}
case AST_APP: {
app* a = to_app(n);
j = a->get_num_args();
while (j > 0) {
--j;
visit(a->get_arg(j), qlist, visited);
}
visit(a->get_decl(), qlist, visited);
break;
}
case AST_QUANTIFIER:
j = to_quantifier(n)->get_num_patterns();
qlist = m_qlist_manager.mk_cons(to_quantifier(n), qlist);
m_qlists.push_back(qlist);
while (j > 0) {
--j;
visit(to_quantifier(n)->get_pattern(j), qlist, visited);
}
j = to_quantifier(n)->get_num_no_patterns();
while (j > 0) {
--j;
visit(to_quantifier(n)->get_no_pattern(j), qlist, visited);
}
j = to_quantifier(n)->get_num_decls();
while (j > 0) {
--j;
visit(to_quantifier(n)->get_decl_sort(j), qlist, visited);
visit_sort(to_quantifier(n)->get_decl_sort(j));
}
visit(to_quantifier(n)->get_expr(), qlist, visited);
break;
default:
break;
}
return visited;
}
void reduce1(ast * n, quantifier_list * qlist) {
format * r;
switch(n->get_kind()) {
case AST_APP:
r = reduce1_app(to_app(n), qlist);
break;
case AST_VAR:
r = reduce1_var(to_var(n), qlist);
break;
case AST_QUANTIFIER:
r = reduce1_quantifier(to_quantifier(n), qlist);
break;
case AST_SORT:
r = reduce1_sort(to_sort(n), qlist);
break;
case AST_FUNC_DECL:
r = reduce1_func_decl(to_func_decl(n), qlist);
break;
}
m_cache.insert(n, qlist, r);
}
format * mk_parameter(parameter const & p, quantifier_list * qlist) {
if (p.is_int()) {
return mk_int(m_manager, p.get_int());
}
else if (p.is_symbol()) {
return mk_string(m_manager, p.get_symbol().str().c_str());
}
else if (p.is_ast()) {
ast * n = p.get_ast();
if (is_func_decl(n)) {
return mk_string(m_manager, to_func_decl(n)->get_name().str().c_str());
}
else {
return get_cached(p.get_ast(), qlist);
}
}
else if (p.is_rational()) {
return mk_string(m_manager, p.get_rational().to_string().c_str());
}
else {
return 0;
}
}
void mk_parameters(unsigned num_params, parameter const * p, quantifier_list * qlist, ptr_buffer<format> & result, bool add_separator) {
bool first = true;
for (unsigned i = 0; i < num_params; i++) {
if (!first && add_separator) {
result.push_back(mk_string(m_manager, ":"));
}
format * pp = mk_parameter(p[i], qlist);
if (pp) {
result.push_back(pp);
first = false;
}
}
}
format * mk_parameters(unsigned num_params, parameter const * p, quantifier_list * qlist) {
if (num_params == 0)
return m_nil;
ptr_buffer<format> buffer;
buffer.push_back(mk_string(m_manager, "["));
mk_parameters(num_params, p, qlist, buffer, true);
buffer.push_back(mk_string(m_manager, "]"));
return mk_compose(m_manager, buffer.size(), buffer.c_ptr());
}
void visit_sort(sort* s) {
if (m_datatype_util.is_datatype(s) &&
!m_visited_datatypes.is_marked(s)) {
m_datatypes.push_back(s);
m_visited_datatypes.mark(s, true);
}
}
format * reduce1_sort(sort * s, quantifier_list * qlist) {
if (m_datatype_util.is_datatype(s)) {
return mk_string(m_manager, s->get_name().str().c_str());
}
ptr_buffer<format> pps;
mk_parameters(s->get_num_parameters(), s->get_parameters(), qlist, pps, false);
std::string name = s->get_name().str();
if (pps.empty())
return mk_string(m_manager, name.c_str());
return mk_seq1(m_manager, pps.c_ptr(), pps.c_ptr() + pps.size(),
f2f(), name.c_str());
}
format * reduce1_func_decl(func_decl * f, quantifier_list * qlist) {
ptr_buffer<format> children;
children.push_back(mk_compose(m_manager,
mk_string(m_manager, f->get_name().str().c_str()),
mk_parameters(f->get_num_parameters(), f->get_parameters(), qlist)));
for (unsigned i = 0; i < f->get_arity(); i++)
children.push_back(get_cached(f->get_domain(i), qlist));
children.push_back(get_cached(f->get_range(), qlist));
return mk_seq1(m_manager, children.begin(), children.end(), f2f(), "define");
}
void get_children(app * n, quantifier_list * qlist, ptr_buffer<format> & result) {
for (unsigned i = 0; i < n->get_num_args(); i++)
result.push_back(get_cached(n->get_arg(i), qlist));
}
format * reduce1_app(app * n, quantifier_list * qlist) {
rational val;
bool is_int;
bool pos;
unsigned bv_size;
uint64 uval;
buffer<symbol> names;
ptr_buffer<format> children;
if (m_autil.is_numeral(n, val, is_int)) {
std::string str;
if (val.is_neg()) {
str = "(- " + (-val).to_string() + ")";
}
else {
str = val.to_string();
}
return mk_string(m_manager, str.c_str());
}
else if (m_bvutil.is_numeral(n, val, bv_size)) {
std::string str = val.to_string();
return mk_compose(m_manager,
mk_string(m_manager, "bv"),
mk_string(m_manager, str.c_str()),
mk_compose(m_manager, mk_string(m_manager, "["), mk_unsigned(m_manager, bv_size), mk_string(m_manager, "]")));
}
else if (m_dl_util.is_finite_sort(n) &&
m_dl_util.is_numeral_ext(n, uval)) {
return mk_string(m_manager, rational(uval,rational::ui64()).to_string().c_str());
}
else if (m_manager.is_label(n, pos, names)) {
get_children(n, qlist, children);
symbol2format f(m_manager);
format * lbl = names.size() > 1 ? mk_seq5(m_manager, names.begin(), names.end(), f) : f(names[0]);
format * args[2] = { lbl, children[0] };
format ** begin = args;
return mk_seq1(m_manager, begin, begin+2, f2f(), pos ? "lblpos" : "lblneg");
}
else if (m_manager.is_pattern(n)) {
get_children(n, qlist, children);
return mk_seq5(m_manager, children.begin(), children.end(), f2f(), "{", "}");
}
else if (m_manager.is_proof(n)) {
get_children(n, qlist, children);
return mk_seq2(m_manager, children.begin(), children.end(), f2f(), n->get_decl()->get_name().str().c_str(),
FORMAT_DEFAULT_INDENT, "[", "]");
}
else if (m_params.m_pp_fixed_indent || (n->get_decl()->get_num_parameters() > 0 && !n->get_decl()->private_parameters())) {
format * head = mk_compose(m_manager,
mk_string(m_manager, n->get_decl()->get_name().str().c_str()),
mk_parameters(n->get_decl()->get_num_parameters(), n->get_decl()->get_parameters(), qlist));
if (n->get_num_args() == 0)
return head;
children.push_back(head);
get_children(n, qlist, children);
return mk_seq4(m_manager, children.begin(), children.end(), f2f());
}
else if (n->get_num_args() == 0)
return mk_string(m_manager, n->get_decl()->get_name().str().c_str());
else {
get_children(n, qlist, children);
return mk_seq1(m_manager, children.begin(), children.end(), f2f(), n->get_decl()->get_name().str().c_str());
}
}
format * reduce1_var(var * v, quantifier_list * qlist) {
unsigned idx = v->get_idx();
unsigned i = idx;
while (!is_nil(qlist)) {
quantifier * q = head(qlist);
if (i < q->get_num_decls())
return mk_string(m_manager, q->get_decl_name(q->get_num_decls() - i - 1).str().c_str());
i -= q->get_num_decls();
qlist = tail(qlist);
}
if (i < m_num_var_names) {
return mk_string(m_manager, m_var_names[m_num_var_names - i - 1]);
}
else {
return mk_compose(m_manager, mk_string(m_manager, "#"), mk_unsigned(m_manager, idx));
}
}
format * reduce1_quantifier(quantifier * q, quantifier_list * qlist) {
qlist = m_qlist_manager.mk_cons(q, qlist);
ptr_buffer<format> buffer;
unsigned num = q->get_num_decls();
for (unsigned j = 0; j < num; j++) {
format * d[2];
d[0] = mk_string(m_manager, q->get_decl_name(j).str().c_str());
d[1] = get_cached(q->get_decl_sort(j), qlist);
format ** it = d;
buffer.push_back(mk_seq5(m_manager, it, it+2, f2f()));
}
buffer.push_back(get_cached(q->get_expr(), qlist));
num = q->get_num_patterns();
char const * pat = ":pat ";
unsigned pat_indent = static_cast<unsigned>(strlen(pat));
for (unsigned i = 0; i < num; i++)
buffer.push_back(mk_compose(m_manager, mk_string(m_manager, pat), mk_indent(m_manager, pat_indent, get_cached(q->get_pattern(i), qlist))));
num = q->get_num_no_patterns();
for (unsigned i = 0; i < num; i++)
buffer.push_back(mk_compose(m_manager, mk_string(m_manager, ":nopat {"), get_cached(q->get_no_pattern(i), qlist), mk_string(m_manager, "}")));
if (q->get_qid() != symbol::null)
buffer.push_back(mk_compose(m_manager, mk_string(m_manager, ":qid {"), mk_string(m_manager, q->get_qid().str().c_str()), mk_string(m_manager, "}")));
return mk_seq3(m_manager, buffer.begin(), buffer.end(), f2f(), q->is_forall() ? "forall" : "exists",
q->get_num_decls());
}
public:
formatter(ast_manager & m, pp_params const & p, unsigned num_var_names, char const * const * var_names):
m_params(p),
m_manager(m),
m_qlist_manager(m),
m_cache(m),
m_qlists(m_qlist_manager),
m_nil(mk_nil(m), fm(m)),
m_autil(m),
m_bvutil(m),
m_datatype_util(m),
m_dl_util(m),
m_format_trail(fm(m)),
m_num_var_names(num_var_names),
m_var_names(var_names) {
}
~formatter() {
}
format * operator()(ast * n) {
m_todo.push_back(pp_entry(n, m_qlist_manager.mk_nil()));
while (!m_todo.empty()) {
pp_entry k = m_todo.back();
if (m_cache.contains(k.first, k.second))
m_todo.pop_back();
else if (visit_children(k.first, k.second)) {
m_todo.pop_back();
reduce1(k.first, k.second);
}
}
format* f1 = get_cached(n, m_qlist_manager.mk_nil());
if (m_datatypes.empty()) {
return f1;
}
ptr_buffer<format> formats;
formats.push_back(f1);
for (unsigned i = 0; i < m_datatypes.size(); ++i) {
sort* s = m_datatypes[i];
std::ostringstream buffer;
m_datatype_util.display_datatype(s, buffer);
format* f2 = mk_string(m_manager, buffer.str().c_str());
formats.push_back(mk_line_break(m_manager));
formats.push_back(f2);
}
f1 = mk_compose(m_manager, formats.size(), formats.c_ptr());
//
// Ensure that reference count is live.
//
m_format_trail.push_back(f1);
return f1;
}
};
std::ostream & ast_pp(std::ostream & out, ast * n, ast_manager & m, pp_params const & p, unsigned indent,
unsigned num_vars, char const * const * names) {
formatter f(m, p, num_vars, names);
app_ref fmt(fm(m));
fmt = f(n);
if (indent > 0)
fmt = format_ns::mk_indent(m, indent, fmt);
pp(out, fmt, m, p);
return out;
}
std::string & ast_pp(std::string & out, ast * n, ast_manager & m, pp_params const & p, unsigned indent) {
std::ostringstream buffer;
buffer << mk_pp(n, m, p, indent);
out += buffer.str();
return out;
}
std::string ast_pp(ast * n, ast_manager & m, pp_params const & p, unsigned indent) {
std::string out;
return ast_pp(out, n, m, p, indent);
}
std::string & ast_pp(std::string & out, ast * n, ast_manager & m) {
return ast_pp(out, n, m, get_pp_default_params());
}
std::string ast_pp(ast * n, ast_manager & m) {
return ast_pp(n, m, get_pp_default_params());
}

39
src/ast/ast_pp.h
View file

@ -15,39 +15,22 @@ Author:
Revision History:
2012-11-17 - ast_smt2_pp is the official pretty printer in Z3
--*/
#ifndef _AST_PP_H_
#define _AST_PP_H_
#include"ast.h"
#include"pp_params.h"
#include"ast_smt2_pp.h"
std::ostream & ast_pp(std::ostream & strm, ast * n, ast_manager & m, pp_params const & p, unsigned indent = 0,
unsigned num_vars = 0, char const * const * names = 0);
std::ostream & ast_pp(std::ostream & strm, ast * n, ast_manager & m);
std::string & ast_pp(std::string & s, ast * n, ast_manager & m, pp_params const & p, unsigned indent = 0);
std::string ast_pp(ast * n, ast_manager & m, pp_params const & p, unsigned indent = 0);
std::string & ast_pp(std::string & s, ast * n, ast_manager & m);
std::string ast_pp(ast * n, ast_manager & m);
struct mk_pp {
ast * m_ast;
ast_manager & m_manager;
pp_params const & m_params;
unsigned m_indent;
unsigned m_num_var_names;
char const * const * m_var_names;
mk_pp(ast * a, ast_manager & m, pp_params const & p, unsigned indent = 0, unsigned num_var_names = 0, char const * const * var_names = 0);
mk_pp(ast * a, ast_manager & m, unsigned indent = 0, unsigned num_var_names = 0, char const * const * var_names = 0);
struct mk_pp : public mk_ismt2_pp {
mk_pp(ast * t, ast_manager & m, pp_params const & p, unsigned indent = 0, unsigned num_vars = 0, char const * var_prefix = 0):
mk_ismt2_pp(t, m, p, indent, num_vars, var_prefix) {
}
mk_pp(ast * t, ast_manager & m, unsigned indent = 0, unsigned num_vars = 0, char const * var_prefix = 0):
mk_ismt2_pp(t, m, indent, num_vars, var_prefix) {
}
};
inline std::ostream& operator<<(std::ostream& out, const mk_pp & p) {
return ast_pp(out, p.m_ast, p.m_manager, p.m_params, p.m_indent, p.m_num_var_names, p.m_var_names);
}
inline std::string& operator+=(std::string& out, const mk_pp & p) {
return ast_pp(out, p.m_ast, p.m_manager, p.m_params, p.m_indent);
}
#endif

4
src/ast/ast_smt_pp.cpp
View file

@ -317,8 +317,8 @@ class smt_printer {
}
void visit_sort(sort* s, bool bool2int = false) {
symbol sym;
if (bool2int && is_bool(s)) {
symbol sym;
if (bool2int && is_bool(s) && !m_is_smt2) {
sym = symbol("Int");
} else if (s->is_sort_of(m_bv_fid, BV_SORT)) {
sym = symbol("BitVec");

3
src/ast/normal_forms/cnf.cpp
View file

@ -16,8 +16,9 @@ Author:
Revision History:
--*/
#include"cnf.h"
#include"var_subst.h"
#include"ast_util.h"
#include"ast_pp.h"
#include"ast_ll_pp.h"

661
src/ast/normal_forms/pull_quant.cpp
View file

@ -17,369 +17,372 @@ Notes:
--*/
#include"pull_quant.h"
#include"var_subst.h"
#include"rewriter_def.h"
#include"ast_pp.h"
#include"for_each_expr.h"
void pull_quant::pull_quant1(func_decl * d, unsigned num_children, expr * const * children, expr_ref & result) {
ptr_buffer<sort> var_sorts;
buffer<symbol> var_names;
symbol qid;
int w = INT_MAX;
// The input formula is in Skolem normal form...
// So all children are forall (positive context) or exists (negative context).
// Remark: (AND a1 ...) may be represented (NOT (OR (NOT a1) ...)))
// So, when pulling a quantifier over a NOT, it becomes an exists.
struct pull_quant::imp {
if (m_manager.is_not(d)) {
SASSERT(num_children == 1);
expr * child = children[0];
if (is_quantifier(child)) {
quantifier * q = to_quantifier(child);
expr * body = q->get_expr();
result = m_manager.update_quantifier(q, !q->is_forall(), m_manager.mk_not(body));
struct rw_cfg : public default_rewriter_cfg {
ast_manager & m_manager;
shift_vars m_shift;
rw_cfg(ast_manager & m):
m_manager(m),
m_shift(m) {
}
else {
result = m_manager.mk_not(child);
}
return;
}
bool found_quantifier = false;
bool forall_children;
for (unsigned i = 0; i < num_children; i++) {
expr * child = children[i];
if (is_quantifier(child)) {
bool pull_quant1_core(func_decl * d, unsigned num_children, expr * const * children, expr_ref & result) {
ptr_buffer<sort> var_sorts;
buffer<symbol> var_names;
symbol qid;
int w = INT_MAX;
if (!found_quantifier) {
found_quantifier = true;
forall_children = is_forall(child);
}
else {
// Since the initial formula was in SNF, all children must be EXISTS or FORALL.
SASSERT(forall_children == is_forall(child));
// The input formula is in Skolem normal form...
// So all children are forall (positive context) or exists (negative context).
// Remark: (AND a1 ...) may be represented (NOT (OR (NOT a1) ...)))
// So, when pulling a quantifier over a NOT, it becomes an exists.
if (m_manager.is_not(d)) {
SASSERT(num_children == 1);
expr * child = children[0];
if (is_quantifier(child)) {
quantifier * q = to_quantifier(child);
expr * body = q->get_expr();
result = m_manager.update_quantifier(q, !q->is_forall(), m_manager.mk_not(body));
return true;
}
else {
return false;
}
}
quantifier * nested_q = to_quantifier(child);
if (var_sorts.empty()) {
// use the qid of one of the nested quantifiers.
qid = nested_q->get_qid();
bool found_quantifier = false;
bool forall_children;
for (unsigned i = 0; i < num_children; i++) {
expr * child = children[i];
if (is_quantifier(child)) {
if (!found_quantifier) {
found_quantifier = true;
forall_children = is_forall(child);
}
else {
// Since the initial formula was in SNF, all children must be EXISTS or FORALL.
SASSERT(forall_children == is_forall(child));
}
quantifier * nested_q = to_quantifier(child);
if (var_sorts.empty()) {
// use the qid of one of the nested quantifiers.
qid = nested_q->get_qid();
}
w = std::min(w, nested_q->get_weight());
unsigned j = nested_q->get_num_decls();
while (j > 0) {
--j;
var_sorts.push_back(nested_q->get_decl_sort(j));
symbol s = nested_q->get_decl_name(j);
if (std::find(var_names.begin(), var_names.end(), s) != var_names.end())
var_names.push_back(m_manager.mk_fresh_var_name(s.is_numerical() ? 0 : s.bare_str()));
else
var_names.push_back(s);
}
}
}
w = std::min(w, nested_q->get_weight());
unsigned j = nested_q->get_num_decls();
while (j > 0) {
--j;
var_sorts.push_back(nested_q->get_decl_sort(j));
symbol s = nested_q->get_decl_name(j);
if (std::find(var_names.begin(), var_names.end(), s) != var_names.end())
var_names.push_back(m_manager.mk_fresh_var_name(s.is_numerical() ? 0 : s.bare_str()));
else
var_names.push_back(s);
}
}
}
if (!var_sorts.empty()) {
SASSERT(found_quantifier);
// adjust the variable ids in formulas in new_children
expr_ref_buffer new_adjusted_children(m_manager);
expr_ref adjusted_child(m_manager);
unsigned num_decls = var_sorts.size();
unsigned shift_amount = 0;
TRACE("pull_quant", tout << "Result num decls:" << num_decls << "\n";);
for (unsigned i = 0; i < num_children; i++) {
expr * child = children[i];
if (!is_quantifier(child)) {
// increment the free variables in child by num_decls because
// child will be in the scope of num_decls bound variables.
m_shift(child, num_decls, adjusted_child);
TRACE("pull_quant", tout << "shifted by: " << num_decls << "\n" <<
mk_pp(child, m_manager) << "\n---->\n" << mk_pp(adjusted_child, m_manager) << "\n";);
if (!var_sorts.empty()) {
SASSERT(found_quantifier);
// adjust the variable ids in formulas in new_children
expr_ref_buffer new_adjusted_children(m_manager);
expr_ref adjusted_child(m_manager);
unsigned num_decls = var_sorts.size();
unsigned shift_amount = 0;
TRACE("pull_quant", tout << "Result num decls:" << num_decls << "\n";);
for (unsigned i = 0; i < num_children; i++) {
expr * child = children[i];
if (!is_quantifier(child)) {
// increment the free variables in child by num_decls because
// child will be in the scope of num_decls bound variables.
m_shift(child, num_decls, adjusted_child);
TRACE("pull_quant", tout << "shifted by: " << num_decls << "\n" <<
mk_pp(child, m_manager) << "\n---->\n" << mk_pp(adjusted_child, m_manager) << "\n";);
}
else {
quantifier * nested_q = to_quantifier(child);
SASSERT(num_decls >= nested_q->get_num_decls());
// Assume nested_q is of the form
// forall xs. P(xs, ys)
// where xs (ys) represents the set of bound (free) variables.
//
// - the index of the variables xs must be increased by shift_amount.
// That is, the number of new bound variables that will precede the bound
// variables xs.
//
// - the index of the variables ys must be increased by num_decls - nested_q->get_num_decls.
// That is, the total number of new bound variables that will be in the scope
// of nested_q->get_expr().
m_shift(nested_q->get_expr(),
nested_q->get_num_decls(), // bound for shift1/shift2
num_decls - nested_q->get_num_decls(), // shift1 (shift by this ammount if var idx >= bound)
shift_amount, // shift2 (shift by this ammount if var idx < bound)
adjusted_child);
TRACE("pull_quant", tout << "shifted bound: " << nested_q->get_num_decls() << " shift1: " << shift_amount <<
" shift2: " << (num_decls - nested_q->get_num_decls()) << "\n" << mk_pp(nested_q->get_expr(), m_manager) <<
"\n---->\n" << mk_pp(adjusted_child, m_manager) << "\n";);
shift_amount += nested_q->get_num_decls();
}
new_adjusted_children.push_back(adjusted_child);
}
// Remark: patterns are ignored.
// This is ok, since this functor is used in one of the following cases:
//
// 1) Superposition calculus is being used, so the
// patterns are useless.
//
// 2) No patterns were provided, and the functor is used
// to increase the effectiveness of the pattern inference
// procedure.
//
// 3) MBQI
std::reverse(var_sorts.begin(), var_sorts.end());
std::reverse(var_names.begin(), var_names.end());
result = m_manager.mk_quantifier(forall_children,
var_sorts.size(),
var_sorts.c_ptr(),
var_names.c_ptr(),
m_manager.mk_app(d, new_adjusted_children.size(), new_adjusted_children.c_ptr()),
w,
qid);
return true;
}
else {
quantifier * nested_q = to_quantifier(child);
SASSERT(num_decls >= nested_q->get_num_decls());
// Assume nested_q is of the form
// forall xs. P(xs, ys)
// where xs (ys) represents the set of bound (free) variables.
//
// - the index of the variables xs must be increased by shift_amount.
// That is, the number of new bound variables that will precede the bound
// variables xs.
//
// - the index of the variables ys must be increased by num_decls - nested_q->get_num_decls.
// That is, the total number of new bound variables that will be in the scope
// of nested_q->get_expr().
m_shift(nested_q->get_expr(),
nested_q->get_num_decls(), // bound for shift1/shift2
num_decls - nested_q->get_num_decls(), // shift1 (shift by this ammount if var idx >= bound)
shift_amount, // shift2 (shift by this ammount if var idx < bound)
adjusted_child);
TRACE("pull_quant", tout << "shifted bound: " << nested_q->get_num_decls() << " shift1: " << shift_amount <<
" shift2: " << (num_decls - nested_q->get_num_decls()) << "\n" << mk_pp(nested_q->get_expr(), m_manager) <<
"\n---->\n" << mk_pp(adjusted_child, m_manager) << "\n";);
shift_amount += nested_q->get_num_decls();
SASSERT(!found_quantifier);
return false;
}
new_adjusted_children.push_back(adjusted_child);
}
// Remark: patterns are ignored.
// This is ok, since this functor is used in one of the following cases:
//
// 1) Superposition calculus is being used, so the
// patterns are useless.
//
// 2) No patterns were provided, and the functor is used
// to increase the effectiveness of the pattern inference
// procedure.
//
// 3) MBQI
std::reverse(var_sorts.begin(), var_sorts.end());
std::reverse(var_names.begin(), var_names.end());
result = m_manager.mk_quantifier(forall_children,
var_sorts.size(),
void pull_quant1(func_decl * d, unsigned num_children, expr * const * children, expr_ref & result) {
if (!pull_quant1_core(d, num_children, children, result)) {
result = m_manager.mk_app(d, num_children, children);
}
}
void pull_quant1_core(quantifier * q, expr * new_expr, expr_ref & result) {
// The original formula was in SNF, so the original quantifiers must be universal.
SASSERT(is_forall(q));
SASSERT(is_forall(new_expr));
quantifier * nested_q = to_quantifier(new_expr);
ptr_buffer<sort> var_sorts;
buffer<symbol> var_names;
var_sorts.append(q->get_num_decls(), const_cast<sort**>(q->get_decl_sorts()));
var_sorts.append(nested_q->get_num_decls(), const_cast<sort**>(nested_q->get_decl_sorts()));
var_names.append(q->get_num_decls(), const_cast<symbol*>(q->get_decl_names()));
var_names.append(nested_q->get_num_decls(), const_cast<symbol*>(nested_q->get_decl_names()));
// Remark: patterns are ignored.
// See comment in reduce1_app
result = m_manager.mk_forall(var_sorts.size(),
var_sorts.c_ptr(),
var_names.c_ptr(),
m_manager.mk_app(d, new_adjusted_children.size(), new_adjusted_children.c_ptr()),
w,
qid);
}
else {
SASSERT(!found_quantifier);
result = m_manager.mk_app(d, num_children, children);
}
}
void pull_quant::pull_quant1(quantifier * q, expr * new_expr, expr_ref & result) {
// The original formula was in SNF, so the original quantifiers must be universal.
SASSERT(is_forall(q));
if (is_forall(new_expr)) {
quantifier * nested_q = to_quantifier(new_expr);
ptr_buffer<sort> var_sorts;
buffer<symbol> var_names;
var_sorts.append(q->get_num_decls(), const_cast<sort**>(q->get_decl_sorts()));
var_sorts.append(nested_q->get_num_decls(), const_cast<sort**>(nested_q->get_decl_sorts()));
var_names.append(q->get_num_decls(), const_cast<symbol*>(q->get_decl_names()));
var_names.append(nested_q->get_num_decls(), const_cast<symbol*>(nested_q->get_decl_names()));
// Remark: patterns are ignored.
// See comment in reduce1_app
result = m_manager.mk_forall(var_sorts.size(),
var_sorts.c_ptr(),
var_names.c_ptr(),
nested_q->get_expr(),
std::min(q->get_weight(), nested_q->get_weight()),
q->get_qid());
}
else {
SASSERT(!is_quantifier(new_expr));
result = m_manager.update_quantifier(q, new_expr);
}
}
void pull_quant::pull_quant1(expr * n, expr_ref & result) {
if (is_app(n))
pull_quant1(to_app(n)->get_decl(), to_app(n)->get_num_args(), to_app(n)->get_args(), result);
else if (is_quantifier(n))
pull_quant1(to_quantifier(n), to_quantifier(n)->get_expr(), result);
else
result = n;
}
// Code for proof generation...
void pull_quant::pull_quant2(expr * n, expr_ref & r, proof_ref & pr) {
pr = 0;
if (is_app(n)) {
expr_ref_buffer new_args(m_manager);
expr_ref new_arg(m_manager);
ptr_buffer<proof> proofs;
unsigned num = to_app(n)->get_num_args();
for (unsigned i = 0; i < num; i++) {
expr * arg = to_app(n)->get_arg(i);
pull_quant1(arg , new_arg);
new_args.push_back(new_arg);
if (new_arg != arg)
proofs.push_back(m_manager.mk_pull_quant(arg, to_quantifier(new_arg)));
nested_q->get_expr(),
std::min(q->get_weight(), nested_q->get_weight()),
q->get_qid());
}
pull_quant1(to_app(n)->get_decl(), new_args.size(), new_args.c_ptr(), r);
if (m_manager.fine_grain_proofs()) {
app * r1 = m_manager.mk_app(to_app(n)->get_decl(), new_args.size(), new_args.c_ptr());
proof * p1 = proofs.empty() ? 0 : m_manager.mk_congruence(to_app(n), r1, proofs.size(), proofs.c_ptr());
proof * p2 = r1 == r ? 0 : m_manager.mk_pull_quant(r1, to_quantifier(r));
pr = m_manager.mk_transitivity(p1, p2);
}
}
else if (is_quantifier(n)) {
expr_ref new_expr(m_manager);
pull_quant1(to_quantifier(n)->get_expr(), new_expr);
pull_quant1(to_quantifier(n), new_expr, r);
if (m_manager.fine_grain_proofs()) {
quantifier * q1 = m_manager.update_quantifier(to_quantifier(n), new_expr);
proof * p1 = 0;
if (n != q1) {
proof * p0 = m_manager.mk_pull_quant(to_quantifier(n)->get_expr(), to_quantifier(new_expr));
p1 = m_manager.mk_quant_intro(to_quantifier(n), q1, p0);
void pull_quant1(quantifier * q, expr * new_expr, expr_ref & result) {
// The original formula was in SNF, so the original quantifiers must be universal.
SASSERT(is_forall(q));
if (is_forall(new_expr)) {
pull_quant1_core(q, new_expr, result);
}
proof * p2 = q1 == r ? 0 : m_manager.mk_pull_quant(q1, to_quantifier(r));
pr = m_manager.mk_transitivity(p1, p2);
}
}
else {
r = n;
}
}
bool pull_quant::visit_children(expr * n) {
bool visited = true;
unsigned j;
switch(n->get_kind()) {
case AST_APP:
// This transformation is also applied after the formula
// has been converted into a SNF using only OR and NOT.
if (m_manager.is_or(n) || m_manager.is_and(n) || m_manager.is_not(n)) {
j = to_app(n)->get_num_args();
while (j > 0) {
--j;
visit(to_app(n)->get_arg(j), visited);
}
}
else {
// This class assumes the formula is in skolem normal form.
SASSERT(!has_quantifiers(n));
}
break;
case AST_QUANTIFIER:
if (to_quantifier(n)->is_forall())
visit(to_quantifier(n)->get_expr(), visited);
break;
default:
break;
}
return visited;
}
void pull_quant::reduce1(expr * n) {
switch(n->get_kind()) {
case AST_APP:
reduce1_app(to_app(n));
break;
case AST_VAR:
cache_result(n, n, 0);
break;
case AST_QUANTIFIER:
reduce1_quantifier(to_quantifier(n));
break;
default:
UNREACHABLE();
break;
}
}
void pull_quant::reduce1_app(app * n) {
if (m_manager.is_or(n) || m_manager.is_and(n) || m_manager.is_not(n)) {
ptr_buffer<expr> new_children;
ptr_buffer<proof> new_children_proofs;
unsigned num = n->get_num_args();
for (unsigned i = 0; i < num; i++) {
expr * new_child = 0;
proof * new_child_pr = 0;
get_cached(n->get_arg(i), new_child, new_child_pr);
new_children.push_back(new_child);
if (new_child_pr) {
new_children_proofs.push_back(new_child_pr);
else {
SASSERT(!is_quantifier(new_expr));
result = m_manager.update_quantifier(q, new_expr);
}
}
expr_ref r(m_manager);
pull_quant1(n->get_decl(), new_children.size(), new_children.c_ptr(), r);
proof * pr = 0;
if (m_manager.fine_grain_proofs()) {
app * n_prime = m_manager.mk_app(n->get_decl(), new_children.size(), new_children.c_ptr());
TRACE("proof_bug", tout << mk_pp(n, m_manager) << "\n";
tout << mk_pp(n_prime, m_manager) << "\n";);
proof * p1 = n == n_prime ? 0 : m_manager.mk_congruence(n, n_prime,
new_children_proofs.size(), new_children_proofs.c_ptr());
proof * p2 = n_prime == r ? 0 : m_manager.mk_pull_quant(n_prime, to_quantifier(r));
pr = m_manager.mk_transitivity(p1, p2);
void pull_quant1(expr * n, expr_ref & result) {
if (is_app(n))
pull_quant1(to_app(n)->get_decl(), to_app(n)->get_num_args(), to_app(n)->get_args(), result);
else if (is_quantifier(n))
pull_quant1(to_quantifier(n), to_quantifier(n)->get_expr(), result);
else
result = n;
}
// Code for proof generation...
void pull_quant2(expr * n, expr_ref & r, proof_ref & pr) {
pr = 0;
if (is_app(n)) {
expr_ref_buffer new_args(m_manager);
expr_ref new_arg(m_manager);
ptr_buffer<proof> proofs;
unsigned num = to_app(n)->get_num_args();
for (unsigned i = 0; i < num; i++) {
expr * arg = to_app(n)->get_arg(i);
pull_quant1(arg , new_arg);
new_args.push_back(new_arg);
if (new_arg != arg)
proofs.push_back(m_manager.mk_pull_quant(arg, to_quantifier(new_arg)));
}
pull_quant1(to_app(n)->get_decl(), new_args.size(), new_args.c_ptr(), r);
if (m_manager.fine_grain_proofs()) {
app * r1 = m_manager.mk_app(to_app(n)->get_decl(), new_args.size(), new_args.c_ptr());
proof * p1 = proofs.empty() ? 0 : m_manager.mk_congruence(to_app(n), r1, proofs.size(), proofs.c_ptr());
proof * p2 = r1 == r ? 0 : m_manager.mk_pull_quant(r1, to_quantifier(r));
pr = m_manager.mk_transitivity(p1, p2);
}
}
else if (is_quantifier(n)) {
expr_ref new_expr(m_manager);
pull_quant1(to_quantifier(n)->get_expr(), new_expr);
pull_quant1(to_quantifier(n), new_expr, r);
if (m_manager.fine_grain_proofs()) {
quantifier * q1 = m_manager.update_quantifier(to_quantifier(n), new_expr);
proof * p1 = 0;
if (n != q1) {
proof * p0 = m_manager.mk_pull_quant(to_quantifier(n)->get_expr(), to_quantifier(new_expr));
p1 = m_manager.mk_quant_intro(to_quantifier(n), q1, p0);
}
proof * p2 = q1 == r ? 0 : m_manager.mk_pull_quant(q1, to_quantifier(r));
pr = m_manager.mk_transitivity(p1, p2);
}
}
else {
r = n;
}
}
cache_result(n, r, pr);
return;
}
TRACE("proof_bug", tout << mk_pp(n, m_manager) << "\n";);
cache_result(n, n, 0);
}
void pull_quant::reduce1_quantifier(quantifier * q) {
if (q->is_forall()) {
expr * new_expr;
proof * new_expr_pr;
get_cached(q->get_expr(), new_expr, new_expr_pr);
expr_ref r(m_manager);
pull_quant1(q, new_expr, r);
proof * pr = 0;
if (m_manager.fine_grain_proofs()) {
quantifier * q_prime = m_manager.update_quantifier(q, new_expr);
proof * p1 = q == q_prime ? 0 : m_manager.mk_quant_intro(q, q_prime, new_expr_pr);
proof * p2 = q_prime == r ? 0 : m_manager.mk_pull_quant(q_prime, to_quantifier(r));
pr = m_manager.mk_transitivity(p1, p2);
br_status reduce_app(func_decl * f, unsigned num, expr * const * args, expr_ref & result, proof_ref & result_pr) {
if (!m_manager.is_or(f) && !m_manager.is_and(f) && !m_manager.is_not(f))
return BR_FAILED;
if (!pull_quant1_core(f, num, args, result))
return BR_FAILED;
if (m_manager.proofs_enabled()) {
result_pr = m_manager.mk_pull_quant(m_manager.mk_app(f, num, args),
to_quantifier(result.get()));
}
return BR_DONE;
}
cache_result(q, r, pr);
return;
}
// should be unreachable, right?
UNREACHABLE();
cache_result(q, q, 0);
}
bool reduce_quantifier(quantifier * old_q,
expr * new_body,
expr * const * new_patterns,
expr * const * new_no_patterns,
expr_ref & result,
proof_ref & result_pr) {
if (old_q->is_exists()) {
UNREACHABLE();
return false;
}
if (!is_forall(new_body))
return false;
pull_quant1_core(old_q, new_body, result);
if (m_manager.proofs_enabled())
result_pr = m_manager.mk_pull_quant(old_q, to_quantifier(result.get()));
return true;
}
};
struct rw : public rewriter_tpl<rw_cfg> {
rw_cfg m_cfg;
rw(ast_manager & m):
rewriter_tpl<rw_cfg>(m, m.proofs_enabled(), m_cfg),
m_cfg(m) {
}
};
pull_quant::pull_quant(ast_manager & m):
base_simplifier(m),
m_shift(m) {
rw m_rw;
imp(ast_manager & m):
m_rw(m) {
}
void operator()(expr * n, expr_ref & r, proof_ref & p) {
m_rw(n, r, p);
}
};
pull_quant::pull_quant(ast_manager & m) {
m_imp = alloc(imp, m);
}
pull_quant::~pull_quant() {
dealloc(m_imp);
}
void pull_quant::operator()(expr * n, expr_ref & r, proof_ref & p) {
flush_cache();
m_todo.push_back(n);
while (!m_todo.empty()) {
expr * n = m_todo.back();
if (is_cached(n))
m_todo.pop_back();
else if (visit_children(n)) {
m_todo.pop_back();
reduce1(n);
(*m_imp)(n, r, p);
}
void pull_quant::reset() {
m_imp->m_rw.reset();
}
void pull_quant::pull_quant2(expr * n, expr_ref & r, proof_ref & pr) {
m_imp->m_rw.cfg().pull_quant2(n, r, pr);
}
struct pull_nested_quant::imp {
struct rw_cfg : public default_rewriter_cfg {
pull_quant m_pull;
expr_ref m_r;
proof_ref m_pr;
rw_cfg(ast_manager & m):m_pull(m), m_r(m), m_pr(m) {}
bool get_subst(expr * s, expr * & t, proof * & t_pr) {
if (!is_quantifier(s))
return false;
m_pull(to_quantifier(s), m_r, m_pr);
t = m_r.get();
t_pr = m_pr.get();
return true;
}
}
expr * result;
proof * result_proof;
get_cached(n, result, result_proof);
};
r = result;
struct rw : public rewriter_tpl<rw_cfg> {
rw_cfg m_cfg;
rw(ast_manager & m):
rewriter_tpl<rw_cfg>(m, m.proofs_enabled(), m_cfg),
m_cfg(m) {
}
};
switch (m_manager.proof_mode()) {
case PGM_DISABLED:
p = m_manager.mk_undef_proof();
break;
case PGM_COARSE:
if (result == n)
p = m_manager.mk_reflexivity(n);
else
p = m_manager.mk_pull_quant_star(n, to_quantifier(result));
break;
case PGM_FINE:
SASSERT(result_proof || result == n);
p = result_proof ? result_proof : m_manager.mk_reflexivity(n);
break;
rw m_rw;
imp(ast_manager & m):
m_rw(m) {
}
void operator()(expr * n, expr_ref & r, proof_ref & p) {
m_rw(n, r, p);
}
};
pull_nested_quant::pull_nested_quant(ast_manager & m) {
m_imp = alloc(imp, m);
}
bool pull_nested_quant::visit_quantifier(quantifier * q) {
// do not recurse.
return true;
pull_nested_quant::~pull_nested_quant() {
dealloc(m_imp);
}
void pull_nested_quant::reduce1_quantifier(quantifier * q) {
expr_ref r(m_manager);
proof_ref pr(m_manager);
m_pull(q, r, pr);
cache_result(q, r, pr);
void pull_nested_quant::operator()(expr * n, expr_ref & r, proof_ref & p) {
(*m_imp)(n, r, p);
}
void pull_nested_quant::reset() {
m_imp->m_rw.reset();
}

34
src/ast/normal_forms/pull_quant.h
View file

@ -19,8 +19,7 @@ Notes:
#ifndef _PULL_QUANT_H_
#define _PULL_QUANT_H_
#include"simplifier.h"
#include"var_subst.h"
#include"ast.h"
/**
\brief Pull nested quantifiers in a formula.
@ -32,22 +31,14 @@ Notes:
\remark If pull_quant(F) is a quantifier then its weight is
Min{weight(Q') | Q' is a quantifier nested in F}
*/
class pull_quant : public base_simplifier {
protected:
shift_vars m_shift;
bool visit_children(expr * n);
void reduce1(expr *);
void reduce1_app(app * n);
void reduce1_quantifier(quantifier * q);
class pull_quant {
struct imp;
imp * m_imp;
public:
pull_quant(ast_manager & m);
virtual ~pull_quant() {}
~pull_quant();
void operator()(expr * n, expr_ref & r, proof_ref & p);
void reset() { flush_cache(); }
void pull_quant1(func_decl * d, unsigned num_children, expr * const * children, expr_ref & result);
void pull_quant1(quantifier * q, expr * new_expr, expr_ref & result);
void pull_quant1(expr * n, expr_ref & result);
void reset();
void pull_quant2(expr * n, expr_ref & r, proof_ref & pr);
};
@ -55,13 +46,14 @@ public:
\brief After applying this transformation the formula will not
contain nested quantifiers.
*/
class pull_nested_quant : public simplifier {
pull_quant m_pull;
virtual bool visit_quantifier(quantifier * q);
virtual void reduce1_quantifier(quantifier * q);
class pull_nested_quant {
struct imp;
imp * m_imp;
public:
pull_nested_quant(ast_manager & m):simplifier(m), m_pull(m) { enable_ac_support(false); }
virtual ~pull_nested_quant() {}
pull_nested_quant(ast_manager & m);
~pull_nested_quant();
void operator()(expr * n, expr_ref & r, proof_ref & p);
void reset();
};
#endif /* _PULL_QUANT_H_ */

39
src/ast/pattern/expr_pattern_match.cpp
View file

@ -205,14 +205,10 @@ expr_pattern_match::match(expr* a, unsigned init, subst& s)
// substitution s contains registers with matching declarations.
return true;
case CHECK_TERM:
TRACE("expr_pattern_match", display(tout, pc);
ast_pp(tout, m_regs[pc.m_reg], m_manager) << "\n";);
ok = (pc.m_pat == m_regs[pc.m_reg]);
break;
case SET_VAR:
case CHECK_VAR: {
TRACE("expr_pattern_match", display(tout, pc);
ast_pp(tout, m_regs[pc.m_reg], m_manager) << "\n";);
app* app1 = to_app(pc.m_pat);
a = m_regs[pc.m_reg];
if (a->get_kind() != AST_APP) {
@ -237,8 +233,6 @@ expr_pattern_match::match(expr* a, unsigned init, subst& s)
break;
}
case SET_BOUND: {
TRACE("expr_pattern_match", display(tout, pc);
ast_pp(tout, m_regs[pc.m_reg], m_manager) << "\n";);
a = m_regs[pc.m_reg];
if (a->get_kind() != AST_VAR) {
break;
@ -329,15 +323,6 @@ expr_pattern_match::match(expr* a, unsigned init, subst& s)
if (k < fac*num_args) {
bstack.push_back(instr(CHOOSE_AC, pc.m_offset, pc.m_next, app2, k+1));
}
TRACE("expr_pattern_match",
{
tout << "fac: " << fac << " num_args:" << num_args << " k:" << k << "\n";
for (unsigned i = 0; i < num_args; ++i) {
ast_pp(tout, m_regs[pc.m_offset + i], m_manager);
tout << " ";
}
tout << "\n";
});
break;
}
case BACKTRACK:
@ -430,24 +415,24 @@ expr_pattern_match::display(std::ostream& out, instr const& pc) const {
break;
case BIND:
out << "bind ";
ast_pp(out, to_app(pc.m_pat)->get_decl(), m_manager) << " ";
ast_pp(out, pc.m_pat, m_manager) << "\n";
out << mk_pp(to_app(pc.m_pat)->get_decl(), m_manager) << " ";
out << mk_pp(pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
out << "offset: " << pc.m_offset << "\n";
out << "reg: " << pc.m_reg << "\n";
break;
case BIND_AC:
out << "bind_ac ";
ast_pp(out, to_app(pc.m_pat)->get_decl(), m_manager) << " ";
ast_pp(out, pc.m_pat, m_manager) << "\n";
out << mk_pp(to_app(pc.m_pat)->get_decl(), m_manager) << " ";
out << mk_pp(pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
out << "offset: " << pc.m_offset << "\n";
out << "reg: " << pc.m_reg << "\n";
break;
case BIND_C:
out << "bind_c ";
ast_pp(out, to_app(pc.m_pat)->get_decl(), m_manager) << " ";
ast_pp(out, pc.m_pat, m_manager) << "\n";
out << mk_pp(to_app(pc.m_pat)->get_decl(), m_manager) << " ";
out << mk_pp(pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
out << "offset: " << pc.m_offset << "\n";
out << "reg: " << pc.m_reg << "\n";
@ -464,23 +449,23 @@ expr_pattern_match::display(std::ostream& out, instr const& pc) const {
break;
case CHECK_VAR:
out << "check_var ";
ast_pp(out, pc.m_pat, m_manager) << "\n";
out << mk_pp(pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
out << "reg: " << pc.m_reg << "\n";
out << "other_reg: " << pc.m_other_reg << "\n";
break;
case CHECK_TERM:
out << "check ";
ast_pp(out, pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
out << "reg: " << pc.m_reg << "\n";
break;
out << mk_pp(pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
out << "reg: " << pc.m_reg << "\n";
break;
case YIELD:
out << "yield\n";
break;
case SET_VAR:
out << "set_var ";
ast_pp(out, pc.m_pat, m_manager) << "\n";
out << mk_pp(pc.m_pat, m_manager) << "\n";
out << "next: " << pc.m_next << "\n";
break;
default:

333
src/ast/proof_checker/proof_checker.cpp
View file

@ -6,8 +6,9 @@
#include "arith_decl_plugin.h"
#include "front_end_params.h"
#include "th_rewriter.h"
#include "var_subst.h"
#define IS_EQUIV(_e_) (m_manager.is_eq(_e_) || m_manager.is_iff(_e_))
#define IS_EQUIV(_e_) (m.is_eq(_e_) || m.is_iff(_e_))
#define SAME_OP(_d1_, _d2_) ((_d1_ == _d2_) || (IS_EQUIV(_d1_) && IS_EQUIV(_d2_)))
@ -79,7 +80,7 @@ void proof_checker::hyp_decl_plugin::get_sort_names(svector<builtin_name> & sort
}
}
proof_checker::proof_checker(ast_manager& m) : m_manager(m), m_todo(m), m_marked(), m_pinned(m), m_nil(m),
proof_checker::proof_checker(ast_manager& m) : m(m), m_todo(m), m_marked(), m_pinned(m), m_nil(m),
m_dump_lemmas(false), m_logic("AUFLIA"), m_proof_lemma_id(0) {
symbol fam_name("proof_hypothesis");
if (!m.has_plugin(fam_name)) {
@ -87,11 +88,11 @@ proof_checker::proof_checker(ast_manager& m) : m_manager(m), m_todo(m), m_marked
}
m_hyp_fid = m.get_family_id(fam_name);
// m_spc_fid = m.get_family_id("spc");
m_nil = m_manager.mk_const(m_hyp_fid, OP_NIL);
m_nil = m.mk_const(m_hyp_fid, OP_NIL);
}
bool proof_checker::check(proof* p, expr_ref_vector& side_conditions) {
proof_ref curr(m_manager);
proof_ref curr(m);
m_todo.push_back(p);
bool result = true;
@ -100,7 +101,7 @@ bool proof_checker::check(proof* p, expr_ref_vector& side_conditions) {
m_todo.pop_back();
result = check1(curr.get(), side_conditions);
if (!result) {
IF_VERBOSE(0, ast_ll_pp(verbose_stream() << "Proof check failed\n", m_manager, curr.get()););
IF_VERBOSE(0, ast_ll_pp(verbose_stream() << "Proof check failed\n", m, curr.get()););
UNREACHABLE();
}
}
@ -114,7 +115,7 @@ bool proof_checker::check(proof* p, expr_ref_vector& side_conditions) {
}
bool proof_checker::check1(proof* p, expr_ref_vector& side_conditions) {
if (p->get_family_id() == m_manager.get_basic_family_id()) {
if (p->get_family_id() == m.get_basic_family_id()) {
return check1_basic(p, side_conditions);
}
#if 0
@ -129,11 +130,11 @@ bool proof_checker::check1_spc(proof* p, expr_ref_vector& side_conditions) {
#if 0
decl_kind k = p->get_decl_kind();
bool is_univ = false;
expr_ref fact(m_manager), fml(m_manager);
expr_ref body(m_manager), fml1(m_manager), fml2(m_manager);
sort_ref_vector sorts(m_manager);
proof_ref p1(m_manager), p2(m_manager);
proof_ref_vector proofs(m_manager);
expr_ref fact(m), fml(m);
expr_ref body(m), fml1(m), fml2(m);
sort_ref_vector sorts(m);
proof_ref p1(m), p2(m);
proof_ref_vector proofs(m);
if (match_proof(p, proofs)) {
for (unsigned i = 0; i < proofs.size(); ++i) {
@ -159,15 +160,15 @@ bool proof_checker::check1_spc(proof* p, expr_ref_vector& side_conditions) {
case PR_FACTORING:
case PR_SPC_DER: {
if (match_fact(p, fact)) {
expr_ref_vector rewrite_eq(m_manager);
expr_ref_vector rewrite_eq(m);
rewrite_eq.push_back(fact.get());
for (unsigned i = 0; i < proofs.size(); ++i) {
if (match_fact(proofs[i].get(), fml)) {
rewrite_eq.push_back(m_manager.mk_not(fml.get()));
rewrite_eq.push_back(m.mk_not(fml.get()));
}
}
expr_ref rewrite_cond(m_manager);
rewrite_cond = m_manager.mk_or(rewrite_eq.size(), rewrite_eq.c_ptr());
expr_ref rewrite_cond(m);
rewrite_cond = m.mk_or(rewrite_eq.size(), rewrite_eq.c_ptr());
side_conditions.push_back(rewrite_cond.get());
return true;
}
@ -184,18 +185,18 @@ bool proof_checker::check1_spc(proof* p, expr_ref_vector& side_conditions) {
bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
decl_kind k = p->get_decl_kind();
expr_ref fml0(m_manager), fml1(m_manager), fml2(m_manager), fml(m_manager);
expr_ref t1(m_manager), t2(m_manager);
expr_ref s1(m_manager), s2(m_manager);
expr_ref u1(m_manager), u2(m_manager);
expr_ref fact(m_manager), body1(m_manager), body2(m_manager);
expr_ref l1(m_manager), l2(m_manager), r1(m_manager), r2(m_manager);
func_decl_ref d1(m_manager), d2(m_manager), d3(m_manager);
proof_ref p0(m_manager), p1(m_manager), p2(m_manager);
proof_ref_vector proofs(m_manager);
func_decl_ref f1(m_manager), f2(m_manager);
expr_ref_vector terms1(m_manager), terms2(m_manager), terms(m_manager);
sort_ref_vector decls1(m_manager), decls2(m_manager);
expr_ref fml0(m), fml1(m), fml2(m), fml(m);
expr_ref t1(m), t2(m);
expr_ref s1(m), s2(m);
expr_ref u1(m), u2(m);
expr_ref fact(m), body1(m), body2(m);
expr_ref l1(m), l2(m), r1(m), r2(m);
func_decl_ref d1(m), d2(m), d3(m);
proof_ref p0(m), p1(m), p2(m);
proof_ref_vector proofs(m);
func_decl_ref f1(m), f2(m);
expr_ref_vector terms1(m), terms2(m), terms(m);
sort_ref_vector decls1(m), decls2(m);
if (match_proof(p, proofs)) {
for (unsigned i = 0; i < proofs.size(); ++i) {
@ -296,7 +297,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
return false;
}
case PR_MONOTONICITY: {
TRACE("proof_checker", tout << mk_bounded_pp(p, m_manager, 3) << "\n";);
TRACE("proof_checker", tout << mk_bounded_pp(p, m, 3) << "\n";);
if (match_fact(p, fact) &&
match_binary(fact.get(), d1, t1, t2) &&
match_app(t1.get(), f1, terms1) &&
@ -334,7 +335,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
match_fact(p1.get(), fml) &&
(match_iff(fact.get(), t1, t2) || match_oeq(fact.get(), t1, t2)) &&
(match_iff(fml.get(), s1, s2) || match_oeq(fml.get(), s1, s2)) &&
m_manager.is_oeq(fact.get()) == m_manager.is_oeq(fml.get()) &&
m.is_oeq(fact.get()) == m.is_oeq(fml.get()) &&
is_quantifier(t1.get()) &&
is_quantifier(t2.get()) &&
to_quantifier(t1.get())->get_expr() == s1.get() &&
@ -366,7 +367,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
return false;
}
case PR_AND_ELIM: {
expr_ref_vector terms(m_manager);
expr_ref_vector terms(m);
if (match_proof(p, p1) &&
match_fact(p, fact) &&
match_fact(p1.get(), fml) &&
@ -381,7 +382,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
return false;
}
case PR_NOT_OR_ELIM: {
expr_ref_vector terms(m_manager);
expr_ref_vector terms(m);
if (match_proof(p, p1) &&
match_fact(p, fact) &&
match_fact(p1.get(), fml) &&
@ -403,25 +404,25 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
side_conditions.push_back(fact.get());
return true;
}
IF_VERBOSE(0, verbose_stream() << "Expected proof of equality:\n" << mk_bounded_pp(p, m_manager););
IF_VERBOSE(0, verbose_stream() << "Expected proof of equality:\n" << mk_bounded_pp(p, m););
return false;
}
case PR_REWRITE_STAR: {
if (match_fact(p, fact) &&
match_equiv(fact.get(), t1, t2)) {
expr_ref_vector rewrite_eq(m_manager);
expr_ref_vector rewrite_eq(m);
rewrite_eq.push_back(fact.get());
for (unsigned i = 0; i < proofs.size(); ++i) {
if (match_fact(proofs[i].get(), fml)) {
rewrite_eq.push_back(m_manager.mk_not(fml.get()));
rewrite_eq.push_back(m.mk_not(fml.get()));
}
}
expr_ref rewrite_cond(m_manager);
rewrite_cond = m_manager.mk_or(rewrite_eq.size(), rewrite_eq.c_ptr());
expr_ref rewrite_cond(m);
rewrite_cond = m.mk_or(rewrite_eq.size(), rewrite_eq.c_ptr());
side_conditions.push_back(rewrite_cond.get());
return true;
}
IF_VERBOSE(0, verbose_stream() << "Expected proof of equality:\n" << mk_bounded_pp(p, m_manager););
IF_VERBOSE(0, verbose_stream() << "Expected proof of equality:\n" << mk_bounded_pp(p, m););
return false;
}
case PR_PULL_QUANT: {
@ -432,7 +433,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
// TBD: check the enchilada.
return true;
}
IF_VERBOSE(0, verbose_stream() << "Expected proof of equivalence with a quantifier:\n" << mk_bounded_pp(p, m_manager););
IF_VERBOSE(0, verbose_stream() << "Expected proof of equivalence with a quantifier:\n" << mk_bounded_pp(p, m););
return false;
}
case PR_PULL_QUANT_STAR: {
@ -442,7 +443,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
// TBD: check the enchilada.
return true;
}
IF_VERBOSE(0, verbose_stream() << "Expected proof of equivalence:\n" << mk_bounded_pp(p, m_manager););
IF_VERBOSE(0, verbose_stream() << "Expected proof of equivalence:\n" << mk_bounded_pp(p, m););
return false;
}
case PR_PUSH_QUANT: {
@ -509,9 +510,9 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
if (match_proof(p, p1) &&
match_fact(p, fact) &&
match_fact(p1.get(), fml) &&
m_manager.is_false(fml.get())) {
expr_ref_vector hypotheses(m_manager);
expr_ref_vector ors(m_manager);
m.is_false(fml.get())) {
expr_ref_vector hypotheses(m);
expr_ref_vector ors(m);
get_hypotheses(p1.get(), hypotheses);
if (hypotheses.size() == 1 && match_negated(hypotheses.get(0), fact)) {
// Suppose fact is (or a b c) and hypothesis is (not (or a b c))
@ -531,18 +532,18 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
tout << "i: " << i << "\n";
tout << "ORs:\n";
for (unsigned i = 0; i < ors.size(); i++) {
tout << mk_pp(ors.get(i), m_manager) << "\n";
tout << mk_pp(ors.get(i), m) << "\n";
}
tout << "HYPOTHESIS:\n";
for (unsigned i = 0; i < hypotheses.size(); i++) {
tout << mk_pp(hypotheses.get(i), m_manager) << "\n";
tout << mk_pp(hypotheses.get(i), m) << "\n";
});
UNREACHABLE();
return false;
}
TRACE("proof_checker", tout << "Matched:\n";
ast_ll_pp(tout, m_manager, hypotheses[i].get());
ast_ll_pp(tout, m_manager, ors[j-1].get()););
ast_ll_pp(tout, m, hypotheses[i].get());
ast_ll_pp(tout, m, ors[j-1].get()););
}
return true;
}
@ -555,7 +556,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
match_fact(proofs[0].get(), fml1) &&
match_fact(proofs[1].get(), fml2) &&
match_negated(fml1.get(), fml2.get()) &&
m_manager.is_false(fact.get())) {
m.is_false(fact.get())) {
return true;
}
if (match_fact(p, fact) &&
@ -580,15 +581,15 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
TRACE("pr_unit_bug",
tout << "Parents:\n";
for (unsigned i = 0; i < proofs.size(); i++) {
expr_ref p(m_manager);
expr_ref p(m);
match_fact(proofs.get(i), p);
tout << mk_pp(p, m_manager) << "\n";
tout << mk_pp(p, m) << "\n";
}
tout << "Fact:\n";
tout << mk_pp(fact, m_manager) << "\n";
tout << mk_pp(fact, m) << "\n";
tout << "Clause:\n";
tout << mk_pp(fml, m_manager) << "\n";
tout << "Could not find premise " << mk_pp(fml2, m_manager) << "\n";
tout << mk_pp(fml, m) << "\n";
tout << "Could not find premise " << mk_pp(fml2, m) << "\n";
);
UNREACHABLE();
@ -597,7 +598,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
}
switch(terms1.size()) {
case 0:
return m_manager.is_false(fact.get());
return m.is_false(fact.get());
case 1:
return fact.get() == terms1[0].get();
default: {
@ -609,15 +610,15 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
found = term1 == terms2[j].get();
}
if (!found) {
IF_VERBOSE(0, verbose_stream() << "Premise not found:" << mk_pp(term1, m_manager) << "\n";);
IF_VERBOSE(0, verbose_stream() << "Premise not found:" << mk_pp(term1, m) << "\n";);
return false;
}
}
return true;
}
IF_VERBOSE(0, verbose_stream() << "Conclusion is not a disjunction:\n";
verbose_stream() << mk_pp(fml.get(), m_manager) << "\n";
verbose_stream() << mk_pp(fact.get(), m_manager) << "\n";);
verbose_stream() << mk_pp(fml.get(), m) << "\n";
verbose_stream() << mk_pp(fact.get(), m) << "\n";);
return false;
}
@ -634,7 +635,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
match_fact(p1.get(), fml1) &&
match_iff(fact.get(), l1, r1) &&
fml1.get() == l1.get() &&
r1.get() == m_manager.mk_true()) {
r1.get() == m.mk_true()) {
return true;
}
UNREACHABLE();
@ -648,7 +649,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
match_iff(fact.get(), l1, r1) &&
match_not(fml1.get(), t1) &&
t1.get() == l1.get() &&
r1.get() == m_manager.mk_false()) {
r1.get() == m.mk_false()) {
return true;
}
UNREACHABLE();
@ -674,7 +675,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
// axiom(?fml)
if (match_fact(p, fact) &&
match_proof(p) &&
m_manager.is_bool(fact.get())) {
m.is_bool(fact.get())) {
return true;
}
UNREACHABLE();
@ -689,7 +690,7 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
//
if (match_fact(p, fact) &&
match_proof(p) &&
m_manager.is_bool(fact.get())) {
m.is_bool(fact.get())) {
return true;
}
UNREACHABLE();
@ -790,16 +791,138 @@ bool proof_checker::check1_basic(proof* p, expr_ref_vector& side_conditions) {
// TODO
return true;
}
case PR_HYPER_RESOLVE: {
proof_ref_vector premises(m);
expr_ref_vector fmls(m);
expr_ref conclusion(m), premise(m), premise0(m), premise1(m);
svector<std::pair<unsigned, unsigned> > positions;
vector<expr_ref_vector> substs;
VERIFY(m.is_hyper_resolve(p, premises, conclusion, positions, substs));
var_subst vs(m, false);
for (unsigned i = 0; i < premises.size(); ++i) {
expr_ref_vector const& sub = substs[i];
premise = m.get_fact(premises[i].get());
if (!sub.empty()) {
if (is_forall(premise)) {
// SASSERT(to_quantifier(premise)->get_num_decls() == sub.size());
premise = to_quantifier(premise)->get_expr();
}
vs(premise, sub.size(), sub.c_ptr(), premise);
}
fmls.push_back(premise.get());
TRACE("proof_checker",
tout << mk_pp(premise.get(), m) << "\n";
for (unsigned j = 0; j < sub.size(); ++j) {
tout << mk_pp(sub[j], m) << " ";
}
tout << "\n";);
}
premise0 = fmls[0].get();
for (unsigned i = 1; i < fmls.size(); ++i) {
expr_ref lit1(m), lit2(m);
expr* lit3 = 0;
std::pair<unsigned, unsigned> pos = positions[i-1];
premise1 = fmls[i].get();
set_false(premise0, pos.first, lit1);
set_false(premise1, pos.second, lit2);
if (m.is_not(lit1, lit3) && lit3 == lit2) {
// ok
}
else if (m.is_not(lit2, lit3) && lit3 == lit1) {
// ok
}
else {
IF_VERBOSE(0, verbose_stream() << "Could not establish complementarity for:\n" <<
mk_pp(lit1, m) << "\n" << mk_pp(lit2, m) << "\n";);
}
fmls[i] = premise1;
}
fmls[0] = premise0;
premise0 = m.mk_or(fmls.size(), fmls.c_ptr());
if (is_forall(conclusion)) {
quantifier* q = to_quantifier(conclusion);
premise0 = m.mk_iff(premise0, q->get_expr());
premise0 = m.mk_forall(q->get_num_decls(), q->get_decl_sorts(), q->get_decl_names(), premise0);
}
else {
premise0 = m.mk_iff(premise0, conclusion);
}
side_conditions.push_back(premise0);
return true;
}
default:
UNREACHABLE();
return false;
}
}
/**
\brief Premises of the rules are of the form
(or l0 l1 l2 .. ln)
or
(=> (and ln+1 ln+2 .. ln+m) l0)
or in the most general (ground) form:
(=> (and ln+1 ln+2 .. ln+m) (or l0 l1 .. ln-1))
In other words we use the following (Prolog style) convention for Horn
implications:
The head of a Horn implication is position 0,
the first conjunct in the body of an implication is position 1
the second conjunct in the body of an implication is position 2
Set the position provided in the argument to 'false'.
*/
void proof_checker::set_false(expr_ref& e, unsigned position, expr_ref& lit) {
app* a = to_app(e);
expr* head, *body;
expr_ref_vector args(m);
if (m.is_or(e)) {
SASSERT(position < a->get_num_args());
args.append(a->get_num_args(), a->get_args());
lit = args[position].get();
args[position] = m.mk_false();
e = m.mk_or(args.size(), args.c_ptr());
}
else if (m.is_implies(e, body, head)) {
expr* const* heads = &head;
unsigned num_heads = 1;
if (m.is_or(head)) {
num_heads = to_app(head)->get_num_args();
heads = to_app(head)->get_args();
}
expr*const* bodies = &body;
unsigned num_bodies = 1;
if (m.is_and(body)) {
num_bodies = to_app(body)->get_num_args();
bodies = to_app(body)->get_args();
}
if (position < num_heads) {
args.append(num_heads, heads);
lit = args[position].get();
args[position] = m.mk_false();
e = m.mk_implies(body, m.mk_or(args.size(), args.c_ptr()));
}
else {
position -= num_heads;
args.append(num_bodies, bodies);
lit = m.mk_not(args[position].get());
args[position] = m.mk_true();
e = m.mk_implies(m.mk_and(args.size(), args.c_ptr()), head);
}
}
else if (position == 0) {
lit = e;
e = m.mk_false();
}
else {
IF_VERBOSE(0, verbose_stream() << position << "\n" << mk_pp(e, m) << "\n";);
UNREACHABLE();
}
}
bool proof_checker::match_fact(proof* p, expr_ref& fact) {
if (m_manager.is_proof(p) &&
m_manager.has_fact(p)) {
fact = m_manager.get_fact(p);
if (m.is_proof(p) &&
m.has_fact(p)) {
fact = m.get_fact(p);
return true;
}
return false;
@ -814,33 +937,33 @@ void proof_checker::add_premise(proof* p) {
bool proof_checker::match_proof(proof* p) {
return
m_manager.is_proof(p) &&
m_manager.get_num_parents(p) == 0;
m.is_proof(p) &&
m.get_num_parents(p) == 0;
}
bool proof_checker::match_proof(proof* p, proof_ref& p0) {
if (m_manager.is_proof(p) &&
m_manager.get_num_parents(p) == 1) {
p0 = m_manager.get_parent(p, 0);
if (m.is_proof(p) &&
m.get_num_parents(p) == 1) {
p0 = m.get_parent(p, 0);
return true;
}
return false;
}
bool proof_checker::match_proof(proof* p, proof_ref& p0, proof_ref& p1) {
if (m_manager.is_proof(p) &&
m_manager.get_num_parents(p) == 2) {
p0 = m_manager.get_parent(p, 0);
p1 = m_manager.get_parent(p, 1);
if (m.is_proof(p) &&
m.get_num_parents(p) == 2) {
p0 = m.get_parent(p, 0);
p1 = m.get_parent(p, 1);
return true;
}
return false;
}
bool proof_checker::match_proof(proof* p, proof_ref_vector& parents) {
if (m_manager.is_proof(p)) {
for (unsigned i = 0; i < m_manager.get_num_parents(p); ++i) {
parents.push_back(m_manager.get_parent(p, i));
if (m.is_proof(p)) {
for (unsigned i = 0; i < m.get_num_parents(p); ++i) {
parents.push_back(m.get_parent(p, i));
}
return true;
}
@ -886,7 +1009,7 @@ bool proof_checker::match_quantifier(expr* e, bool& is_univ, sort_ref_vector& so
bool proof_checker::match_op(expr* e, decl_kind k, expr_ref& t1, expr_ref& t2) {
if (e->get_kind() == AST_APP &&
to_app(e)->get_family_id() == m_manager.get_basic_family_id() &&
to_app(e)->get_family_id() == m.get_basic_family_id() &&
to_app(e)->get_decl_kind() == k &&
to_app(e)->get_num_args() == 2) {
t1 = to_app(e)->get_arg(0);
@ -898,7 +1021,7 @@ bool proof_checker::match_op(expr* e, decl_kind k, expr_ref& t1, expr_ref& t2) {
bool proof_checker::match_op(expr* e, decl_kind k, expr_ref_vector& terms) {
if (e->get_kind() == AST_APP &&
to_app(e)->get_family_id() == m_manager.get_basic_family_id() &&
to_app(e)->get_family_id() == m.get_basic_family_id() &&
to_app(e)->get_decl_kind() == k) {
for (unsigned i = 0; i < to_app(e)->get_num_args(); ++i) {
terms.push_back(to_app(e)->get_arg(i));
@ -911,7 +1034,7 @@ bool proof_checker::match_op(expr* e, decl_kind k, expr_ref_vector& terms) {
bool proof_checker::match_op(expr* e, decl_kind k, expr_ref& t) {
if (e->get_kind() == AST_APP &&
to_app(e)->get_family_id() == m_manager.get_basic_family_id() &&
to_app(e)->get_family_id() == m.get_basic_family_id() &&
to_app(e)->get_decl_kind() == k &&
to_app(e)->get_num_args() == 1) {
t = to_app(e)->get_arg(0);
@ -953,7 +1076,7 @@ bool proof_checker::match_oeq(expr* e, expr_ref& t1, expr_ref& t2) {
}
bool proof_checker::match_negated(expr* a, expr* b) {
expr_ref t(m_manager);
expr_ref t(m);
return
(match_not(a, t) && t.get() == b) ||
(match_not(b, t) && t.get() == a);
@ -961,7 +1084,7 @@ bool proof_checker::match_negated(expr* a, expr* b) {
void proof_checker::get_ors(expr* e, expr_ref_vector& ors) {
ptr_buffer<expr> buffer;
if (m_manager.is_or(e)) {
if (m.is_or(e)) {
app* a = to_app(e);
ors.append(a->get_num_args(), a->get_args());
}
@ -974,12 +1097,12 @@ void proof_checker::get_ors(expr* e, expr_ref_vector& ors) {
void proof_checker::get_hypotheses(proof* p, expr_ref_vector& ante) {
ptr_vector<proof> stack;
expr* h = 0;
expr_ref hyp(m_manager);
expr_ref hyp(m);
stack.push_back(p);
while (!stack.empty()) {
p = stack.back();
SASSERT(m_manager.is_proof(p));
SASSERT(m.is_proof(p));
if (m_hypotheses.contains(p)) {
stack.pop_back();
continue;
@ -992,15 +1115,15 @@ void proof_checker::get_hypotheses(proof* p, expr_ref_vector& ante) {
continue;
}
// in this system all hypotheses get bound by lemmas.
if (m_manager.is_lemma(p)) {
if (m.is_lemma(p)) {
m_hypotheses.insert(p, mk_nil());
stack.pop_back();
continue;
}
bool all_found = true;
ptr_vector<expr> hyps;
for (unsigned i = 0; i < m_manager.get_num_parents(p); ++i) {
proof* p_i = m_manager.get_parent(p, i);
for (unsigned i = 0; i < m.get_num_parents(p); ++i) {
proof* p_i = m.get_parent(p, i);
if (m_hypotheses.find(p_i, h)) {
hyps.push_back(h);
}
@ -1028,7 +1151,7 @@ void proof_checker::get_hypotheses(proof* p, expr_ref_vector& ante) {
ptr_buffer<expr> todo;
expr_mark mark;
todo.push_back(h);
expr_ref a(m_manager), b(m_manager);
expr_ref a(m), b(m);
while (!todo.empty()) {
h = todo.back();
@ -1051,10 +1174,10 @@ void proof_checker::get_hypotheses(proof* p, expr_ref_vector& ante) {
}
TRACE("proof_checker",
{
ast_ll_pp(tout << "Getting hypotheses from: ", m_manager, p);
ast_ll_pp(tout << "Getting hypotheses from: ", m, p);
tout << "Found hypotheses:\n";
for (unsigned i = 0; i < ante.size(); ++i) {
ast_ll_pp(tout, m_manager, ante[i].get());
ast_ll_pp(tout, m, ante[i].get());
}
});
@ -1090,11 +1213,11 @@ bool proof_checker::match_atom(expr* e, expr_ref& a) const {
}
expr* proof_checker::mk_atom(expr* e) {
return m_manager.mk_app(m_hyp_fid, OP_ATOM, e);
return m.mk_app(m_hyp_fid, OP_ATOM, e);
}
expr* proof_checker::mk_cons(expr* a, expr* b) {
return m_manager.mk_app(m_hyp_fid, OP_CONS, a, b);
return m.mk_app(m_hyp_fid, OP_CONS, a, b);
}
expr* proof_checker::mk_nil() {
@ -1103,7 +1226,7 @@ expr* proof_checker::mk_nil() {
bool proof_checker::is_hypothesis(proof* p) const {
return
m_manager.is_proof(p) &&
m.is_proof(p) &&
p->get_decl_kind() == PR_HYPOTHESIS;
}
@ -1130,14 +1253,14 @@ expr* proof_checker::mk_hyp(unsigned num_hyps, expr * const * hyps) {
void proof_checker::dump_proof(proof * pr) {
if (!m_dump_lemmas)
return;
SASSERT(m_manager.has_fact(pr));
expr * consequent = m_manager.get_fact(pr);
unsigned num = m_manager.get_num_parents(pr);
SASSERT(m.has_fact(pr));
expr * consequent = m.get_fact(pr);
unsigned num = m.get_num_parents(pr);
ptr_buffer<expr> antecedents;
for (unsigned i = 0; i < num; i++) {
proof * a = m_manager.get_parent(pr, i);
SASSERT(m_manager.has_fact(a));
antecedents.push_back(m_manager.get_fact(a));
proof * a = m.get_parent(pr, i);
SASSERT(m.has_fact(a));
antecedents.push_back(m.get_fact(a));
}
dump_proof(antecedents.size(), antecedents.c_ptr(), consequent);
}
@ -1150,21 +1273,20 @@ void proof_checker::dump_proof(unsigned num_antecedents, expr * const * antecede
sprintf(buffer, "proof_lemma_%d.smt", m_proof_lemma_id);
#endif
std::ofstream out(buffer);
ast_smt_pp pp(m_manager);
ast_smt_pp pp(m);
pp.set_benchmark_name("lemma");
pp.set_status("unsat");
pp.set_logic(m_logic.c_str());
for (unsigned i = 0; i < num_antecedents; i++)
pp.add_assumption(antecedents[i]);
expr_ref n(m_manager);
n = m_manager.mk_not(consequent);
expr_ref n(m);
n = m.mk_not(consequent);
pp.display(out, n);
out.close();
m_proof_lemma_id++;
}
bool proof_checker::check_arith_literal(bool is_pos, app* lit0, rational const& coeff, expr_ref& sum, bool& is_strict) {
ast_manager& m = m_manager;
arith_util a(m);
app* lit = lit0;
@ -1173,7 +1295,7 @@ bool proof_checker::check_arith_literal(bool is_pos, app* lit0, rational const&
is_pos = !is_pos;
}
if (!a.is_le(lit) && !a.is_lt(lit) && !a.is_ge(lit) && !a.is_gt(lit) && !m.is_eq(lit)) {
std::cout << mk_pp(lit, m) << "\n";
IF_VERBOSE(0, verbose_stream() << mk_pp(lit, m) << "\n";);
return false;
}
SASSERT(lit->get_num_args() == 2);
@ -1237,7 +1359,7 @@ bool proof_checker::check_arith_literal(bool is_pos, app* lit0, rational const&
rw(sum);
}
std::cout << coeff << "\n" << mk_pp(lit0, m) << "\n" << mk_pp(sum, m) << "\n";
IF_VERBOSE(0, verbose_stream() << coeff << "\n" << mk_pp(lit0, m) << "\n" << mk_pp(sum, m) << "\n";);
#endif
return true;
@ -1247,7 +1369,6 @@ bool proof_checker::check_arith_proof(proof* p) {
func_decl* d = p->get_decl();
SASSERT(PR_TH_LEMMA == p->get_decl_kind());
SASSERT(d->get_parameter(0).get_symbol() == "arith");
ast_manager& m = m_manager;
unsigned num_params = d->get_num_parameters();
arith_util autil(m);
@ -1257,7 +1378,7 @@ bool proof_checker::check_arith_proof(proof* p) {
return true;
}
expr_ref fact(m);
proof_ref_vector proofs(m_manager);
proof_ref_vector proofs(m);
if (!match_fact(p, fact)) {
UNREACHABLE();
@ -1331,7 +1452,7 @@ bool proof_checker::check_arith_proof(proof* p) {
rw(sum);
if (!m.is_false(sum)) {
std::cout << "Arithmetic proof check failed: " << mk_pp(sum, m) << "\n";
IF_VERBOSE(0, verbose_stream() << "Arithmetic proof check failed: " << mk_pp(sum, m) << "\n";);
m_dump_lemmas = true;
dump_proof(p);
return false;

4
src/ast/proof_checker/proof_checker.h
View file

@ -23,7 +23,7 @@ Revision History:
#include "map.h"
class proof_checker {
ast_manager& m_manager;
ast_manager& m;
proof_ref_vector m_todo;
expr_mark m_marked;
expr_ref_vector m_pinned;
@ -111,6 +111,8 @@ private:
expr* mk_hyp(unsigned num_hyps, expr * const * hyps);
void dump_proof(proof * pr);
void dump_proof(unsigned num_antecedents, expr * const * antecedents, expr * consequent);
void set_false(expr_ref& e, unsigned idx, expr_ref& lit);
};
#endif

2
src/ast/substitution/substitution_tree.cpp
View file

@ -610,7 +610,7 @@ void substitution_tree::display(std::ostream & out, node * n, unsigned delta) co
pp_params p;
p.m_pp_single_line = true;
out << " ==> ";
ast_pp(out, n->m_expr, m_manager, p);
out << mk_pp(n->m_expr, m_manager, p);
out << "\n";
}
else {

10
src/cmd_context/cmd_context.cpp
View file

@ -459,7 +459,8 @@ bool cmd_context::logic_has_arith_core(symbol const & s) const {
s == "UFNIA" ||
s == "LIA" ||
s == "LRA" ||
s == "QF_FPA" ;
s == "QF_FPA" ||
s == "HORN";
}
bool cmd_context::logic_has_arith() const {
@ -479,6 +480,12 @@ bool cmd_context::logic_has_bv_core(symbol const & s) const {
s == "QF_BVRE";
}
bool cmd_context::logic_has_horn(symbol const& s) const {
return
s == "HORN";
}
bool cmd_context::logic_has_bv() const {
return !has_logic() || logic_has_bv_core(m_logic);
}
@ -589,6 +596,7 @@ bool cmd_context::supported_logic(symbol const & s) const {
return s == "QF_UF" || s == "UF" ||
logic_has_arith_core(s) || logic_has_bv_core(s) ||
logic_has_array_core(s) || logic_has_seq_core(s) ||
logic_has_horn(s) ||
s == "QF_FPA";
}

1
src/cmd_context/cmd_context.h
View file

@ -233,6 +233,7 @@ protected:
bool logic_has_bv_core(symbol const & s) const;
bool logic_has_array_core(symbol const & s) const;
bool logic_has_seq_core(symbol const & s) const;
bool logic_has_horn(symbol const& s) const;
bool logic_has_arith() const;
bool logic_has_bv() const;
bool logic_has_seq() const;

2
src/math/euclid/README Normal file
View file

@ -0,0 +1,2 @@
Basic Euclidean solver for linear integer equations.
This solver generates "explanations".

2
src/math/interval/README Normal file
View file

@ -0,0 +1,2 @@
Template for interval arithmetic. The template can be instantiated using different numeral (integers/mpz, rationals/mpq, floating-point/mpf, etc) packages.
The class im_default_config defines a default configuration for the template that uses rationals. It also shows what is the expected signature used by the template.

3
src/math/polynomial/README Normal file
View file

@ -0,0 +1,3 @@
Polynomial manipulation package.
It contains support for univariate (upolynomial.*) and multivariate polynomials (polynomial.*).
Multivariate polynomial factorization does not work yet (polynomial_factorization.*), and it is disabled.

2
src/muz_qe/dl_base.cpp
View file

@ -47,7 +47,7 @@ namespace datalog {
out<<"(";
for(unsigned i=0; i<sz; i++) {
if(i) { out<<","; }
out<<ast_pp((*this)[i], m);
out << mk_pp((*this)[i], m);
}
out<<")";
}

4
src/muz_qe/dl_bmc_engine.cpp
View file

@ -1096,6 +1096,10 @@ namespace datalog {
m_solver.collect_statistics(st);
}
void bmc::reset_statistics() {
m_solver.reset_statistics();
}
void bmc::collect_params(param_descrs& p) {
}

2
src/muz_qe/dl_bmc_engine.h
View file

@ -127,6 +127,8 @@ namespace datalog {
void collect_statistics(statistics& st) const;
void reset_statistics();
expr_ref get_answer();
static void collect_params(param_descrs& p);

99
src/muz_qe/dl_cmds.cpp
View file

@ -28,20 +28,25 @@ Notes:
#include"cancel_eh.h"
#include"scoped_ctrl_c.h"
#include"scoped_timer.h"
#include"trail.h"
#include<iomanip>
class dl_context {
cmd_context & m_cmd;
dl_collected_cmds* m_collected_cmds;
unsigned m_ref_count;
datalog::dl_decl_plugin* m_decl_plugin;
scoped_ptr<datalog::context> m_context;
scoped_ptr<datalog::context> m_context;
trail_stack<dl_context> m_trail;
public:
dl_context(cmd_context & ctx):
dl_context(cmd_context & ctx, dl_collected_cmds* collected_cmds):
m_cmd(ctx),
m_collected_cmds(collected_cmds),
m_ref_count(0),
m_decl_plugin(0) {}
m_decl_plugin(0),
m_trail(*this) {}
void inc_ref() {
++m_ref_count;
@ -74,14 +79,53 @@ public:
void reset() {
m_context = 0;
}
void register_predicate(func_decl* pred, unsigned num_kinds, symbol const* kinds) {
if (m_collected_cmds) {
m_collected_cmds->m_rels.push_back(pred);
m_trail.push(push_back_vector<dl_context, func_decl_ref_vector>(m_collected_cmds->m_rels));
}
dlctx().register_predicate(pred, false);
dlctx().set_predicate_representation(pred, num_kinds, kinds);
}
void add_rule(expr * rule, symbol const& name) {
init();
std::string error_msg;
m_context->add_rule(rule, name);
if (m_collected_cmds) {
expr_ref rl = m_context->bind_variables(rule, true);
m_collected_cmds->m_rules.push_back(rl);
m_collected_cmds->m_names.push_back(name);
m_trail.push(push_back_vector<dl_context, expr_ref_vector>(m_collected_cmds->m_rules));
m_trail.push(push_back_vector<dl_context, svector<symbol> >(m_collected_cmds->m_names));
}
else {
m_context->add_rule(rule, name);
}
}
bool collect_query(expr* q) {
if (m_collected_cmds) {
expr_ref qr = m_context->bind_variables(q, false);
m_collected_cmds->m_queries.push_back(qr);
m_trail.push(push_back_vector<dl_context, expr_ref_vector>(m_collected_cmds->m_queries));
return true;
}
else {
return false;
}
}
void push() {
m_trail.push_scope();
dlctx().push();
}
void pop() {
m_trail.pop_scope(1);
dlctx().pop();
}
datalog::context & get_dl_context() {
datalog::context & dlctx() {
init();
return *m_context;
}
@ -160,7 +204,10 @@ public:
if (m_target == 0) {
throw cmd_exception("invalid query command, argument expected");
}
datalog::context& dlctx = m_dl_ctx->get_dl_context();
if (m_dl_ctx->collect_query(m_target)) {
return;
}
datalog::context& dlctx = m_dl_ctx->dlctx();
set_background(ctx);
dlctx.updt_params(m_params);
unsigned timeout = m_params.get_uint(":timeout", UINT_MAX);
@ -217,7 +264,7 @@ public:
}
virtual void init_pdescrs(cmd_context & ctx, param_descrs & p) {
m_dl_ctx->get_dl_context().collect_params(p);
m_dl_ctx->dlctx().collect_params(p);
insert_timeout(p);
p.insert(":print-answer", CPK_BOOL, "(default: false) print answer instance(s) to query.");
p.insert(":print-certificate", CPK_BOOL, "(default: false) print certificate for reachability or non-reachability.");
@ -227,7 +274,7 @@ public:
private:
void set_background(cmd_context& ctx) {
datalog::context& dlctx = m_dl_ctx->get_dl_context();
datalog::context& dlctx = m_dl_ctx->dlctx();
ptr_vector<expr>::const_iterator it = ctx.begin_assertions();
ptr_vector<expr>::const_iterator end = ctx.end_assertions();
for (; it != end; ++it) {
@ -237,7 +284,7 @@ private:
void print_answer(cmd_context& ctx) {
if (m_params.get_bool(":print-answer", false)) {
datalog::context& dlctx = m_dl_ctx->get_dl_context();
datalog::context& dlctx = m_dl_ctx->dlctx();
ast_manager& m = ctx.m();
expr_ref query_result(dlctx.get_answer_as_formula(), m);
sbuffer<symbol> var_names;
@ -253,7 +300,7 @@ private:
void print_statistics(cmd_context& ctx) {
if (m_params.get_bool(":print-statistics", false)) {
statistics st;
datalog::context& dlctx = m_dl_ctx->get_dl_context();
datalog::context& dlctx = m_dl_ctx->dlctx();
unsigned long long max_mem = memory::get_max_used_memory();
unsigned long long mem = memory::get_allocation_size();
dlctx.collect_statistics(st);
@ -266,7 +313,7 @@ private:
void print_certificate(cmd_context& ctx) {
if (m_params.get_bool(":print-certificate", false)) {
datalog::context& dlctx = m_dl_ctx->get_dl_context();
datalog::context& dlctx = m_dl_ctx->dlctx();
if (!dlctx.display_certificate(ctx.regular_stream())) {
throw cmd_exception("certificates are not supported for selected DL_ENGINE");
}
@ -286,6 +333,7 @@ class dl_declare_rel_cmd : public cmd {
void ensure_domain(cmd_context& ctx) {
if (!m_domain) m_domain = alloc(sort_ref_vector, ctx.m());
}
public:
dl_declare_rel_cmd(dl_context * dl_ctx):
cmd("declare-rel"),
@ -334,11 +382,7 @@ public:
func_decl_ref pred(
m.mk_func_decl(m_rel_name, m_domain->size(), m_domain->c_ptr(), m.mk_bool_sort()), m);
ctx.insert(pred);
datalog::context& dctx = m_dl_ctx->get_dl_context();
dctx.register_predicate(pred, false);
if(!m_kinds.empty()) {
dctx.set_predicate_representation(pred, m_kinds.size(), m_kinds.c_ptr());
}
m_dl_ctx->register_predicate(pred, m_kinds.size(), m_kinds.c_ptr());
m_domain = 0;
}
@ -385,7 +429,7 @@ public:
ast_manager& m = ctx.m();
func_decl_ref var(m.mk_func_decl(m_var_name, 0, static_cast<sort*const*>(0), m_var_sort), m);
ctx.insert(var);
m_dl_ctx->get_dl_context().register_variable(var);
m_dl_ctx->dlctx().register_variable(var);
}
};
@ -402,7 +446,7 @@ public:
virtual char const * get_descr(cmd_context & ctx) const { return "push context on the fixedpoint engine"; }
virtual void execute(cmd_context& ctx) {
m_ctx->get_dl_context().push();
m_ctx->push();
}
};
@ -418,19 +462,24 @@ public:
virtual char const * get_descr(cmd_context & ctx) const { return "pop context on the fixedpoint engine"; }
virtual void execute(cmd_context& ctx) {
m_ctx->get_dl_context().pop();
m_ctx->pop();
}
};
void install_dl_cmds(cmd_context & ctx) {
dl_context * dl_ctx = alloc(dl_context, ctx);
static void install_dl_cmds_aux(cmd_context& ctx, dl_collected_cmds* collected_cmds) {
dl_context * dl_ctx = alloc(dl_context, ctx, collected_cmds);
ctx.insert(alloc(dl_rule_cmd, dl_ctx));
ctx.insert(alloc(dl_query_cmd, dl_ctx));
ctx.insert(alloc(dl_declare_rel_cmd, dl_ctx));
ctx.insert(alloc(dl_declare_var_cmd, dl_ctx));
PRIVATE_PARAMS(ctx.insert(alloc(dl_push_cmd, dl_ctx));); // not exposed to keep command-extensions simple.
PRIVATE_PARAMS(ctx.insert(alloc(dl_pop_cmd, dl_ctx)););
PRIVATE_PARAMS(ctx.insert(alloc(dl_pop_cmd, dl_ctx)););
}
void install_dl_cmds(cmd_context & ctx) {
install_dl_cmds_aux(ctx, 0);
}
void install_dl_collect_cmds(dl_collected_cmds& collected_cmds, cmd_context & ctx) {
install_dl_cmds_aux(ctx, &collected_cmds);
}

34
src/muz_qe/dl_cmds.h
View file

@ -10,7 +10,7 @@ Abstract:
Author:
Leonardo (leonardo) 2011-03-28
Nikolaj Bjorner (nbjorner) 2012-11-17
Notes:
@ -18,30 +18,20 @@ Notes:
#ifndef _DL_CMDS_H_
#define _DL_CMDS_H_
class cmd;
#include "ast.h"
class cmd_context;
struct dl_collected_cmds {
expr_ref_vector m_rules;
svector<symbol> m_names;
expr_ref_vector m_queries;
func_decl_ref_vector m_rels;
dl_collected_cmds(ast_manager& m) : m_rules(m), m_queries(m), m_rels(m) {}
};
void install_dl_cmds(cmd_context & ctx);
void install_dl_collect_cmds(dl_collected_cmds& collected_cmds, cmd_context& ctx);
namespace datalog {
class context;
/**
Create a command for declaring relations which is connected to
a particular datalog context.
Caller must ensure the returned object is deallocated (e.g. by passing it to a cmd_context).
*/
cmd * mk_declare_rel_cmd(context& dctx);
/**
Declare a constant as a universal/existential variable.
It is implicitly existentially or universally quantified
by the rules.
*/
cmd * mk_declare_var_cmd(context& dctx);
}
#endif

197
src/muz_qe/dl_context.cpp
View file

@ -49,11 +49,14 @@ Revision History:
#include"dl_skip_table.h"
#endif
#include"for_each_expr.h"
#include"ast_smt_pp.h"
#include"ast_smt2_pp.h"
#include"expr_functors.h"
#include"dl_mk_partial_equiv.h"
#include"dl_mk_bit_blast.h"
#include"datatype_decl_plugin.h"
#include"expr_abstract.h"
namespace datalog {
@ -331,8 +334,39 @@ namespace datalog {
m_vars.push_back(m.mk_const(var));
}
expr_ref context::bind_variables(expr* fml, bool is_forall) {
expr_ref result(m);
app_ref_vector const& vars = m_vars;
if (vars.empty()) {
result = fml;
}
else {
ptr_vector<sort> sorts;
expr_abstract(m, 0, vars.size(), reinterpret_cast<expr*const*>(vars.c_ptr()), fml, result);
get_free_vars(result, sorts);
if (sorts.empty()) {
result = fml;
}
else {
svector<symbol> names;
for (unsigned i = 0; i < sorts.size(); ++i) {
if (!sorts[i]) {
sorts[i] = m.mk_bool_sort();
}
names.push_back(symbol(i));
}
quantifier_ref q(m);
q = m.mk_quantifier(is_forall, sorts.size(), sorts.c_ptr(), names.c_ptr(), result);
elim_unused_vars(m, q, result);
}
}
return result;
}
void context::register_predicate(func_decl * decl, bool named) {
SASSERT(!m_preds.contains(decl));
if (m_preds.contains(decl)) {
return;
}
m_pinned.push_back(decl);
m_preds.insert(decl);
if (named) {
@ -429,57 +463,35 @@ namespace datalog {
}
void context::set_predicate_representation(func_decl * pred, unsigned relation_name_cnt,
symbol * const relation_names) {
symbol const * relation_names) {
relation_manager & rmgr = get_rmanager();
family_id target_kind = null_family_id;
if (relation_name_cnt==1) {
switch (relation_name_cnt) {
case 0:
return;
case 1:
target_kind = get_ordinary_relation_plugin(relation_names[0]).get_kind();
} else {
relation_plugin * tr_plugin = 0; //table plugin, if there is such
ptr_vector<relation_plugin> rel_plugins; //plugins that are not table plugins
svector<family_id> rel_kinds; //kinds of plugins that are not table plugins
for (unsigned i=0; i<relation_name_cnt; i++) {
break;
default: {
svector<family_id> rel_kinds; // kinds of plugins that are not table plugins
family_id rel_kind; // the aggregate kind of non-table plugins
for (unsigned i = 0; i < relation_name_cnt; i++) {
relation_plugin & p = get_ordinary_relation_plugin(relation_names[i]);
//commented out, because support combining relations with tables using fpr is not yet implemented
/*if (p.from_table()) {
if (tr_plugin) {
//it does not give any extra benefit to have an intersection of two tables.
//Maybe when we can specify which columns belong to which plugin,
//it might be of use.
throw default_exception("two table plugins cannot be specified as relation type");
}
tr_plugin = &p;
}
else {*/
rel_plugins.push_back(&p);
rel_kinds.push_back(p.get_kind());
/*}*/
rel_kinds.push_back(p.get_kind());
}
SASSERT(!rel_kinds.empty());
// relation_plugin * rel_plugin; //the aggregate kind of non-table plugins
family_id rel_kind; //the aggregate kind of non-table plugins
if (rel_kinds.size()==1) {
if (rel_kinds.size() == 1) {
rel_kind = rel_kinds[0];
// rel_plugin = rel_plugins[0];
}
else {
relation_signature rel_sig;
//rmgr.from_predicate(pred, rel_sig);
product_relation_plugin & prod_plugin = product_relation_plugin::get_plugin(rmgr);
rel_kind = prod_plugin.get_relation_kind(rel_sig, rel_kinds);
// rel_plugin = &prod_plugin;
}
if (tr_plugin==0) {
target_kind = rel_kind;
}
else {
NOT_IMPLEMENTED_YET();
#if 0
finite_product_relation_plugin & fprp = finite_product_relation_plugin::get_plugin(rmgr, *rel_plugin);
finite_product_relation_plugin::rel_spec spec;
#endif
}
target_kind = rel_kind;
break;
}
}
SASSERT(target_kind != null_family_id);
@ -958,7 +970,8 @@ namespace datalog {
p.insert(":output-profile", CPK_BOOL, "determines whether profile informations should be output when outputting Datalog rules or instructions");
p.insert(":output-tuples", CPK_BOOL, "determines whether tuples for output predicates should be output");
p.insert(":profile-timeout-milliseconds", CPK_UINT, "instructions and rules that took less than the threshold will not be printed when printed the instruction/rule list");
p.insert(":print-with-fixedpoint-extensions", CPK_BOOL, "(default true) use SMT-LIB2 fixedpoint extensions, instead of pure SMT2, when printing rules");
PRIVATE_PARAMS(
p.insert(":dbg-fpr-nonempty-relation-signature", CPK_BOOL,
"if true, finite_product_relation will attempt to avoid creating inner relation with empty signature "
@ -1198,7 +1211,6 @@ namespace datalog {
case DATALOG_ENGINE:
return dl_query(query);
case PDR_ENGINE:
return pdr_query(query);
case QPDR_ENGINE:
return pdr_query(query);
case BMC_ENGINE:
@ -1219,6 +1231,28 @@ namespace datalog {
m_last_answer = get_manager().mk_true();
}
model_ref context::get_model() {
switch(get_engine()) {
case PDR_ENGINE:
case QPDR_ENGINE:
ensure_pdr();
return m_pdr->get_model();
default:
return model_ref(alloc(model, m));
}
}
proof_ref context::get_proof() {
switch(get_engine()) {
case PDR_ENGINE:
case QPDR_ENGINE:
ensure_pdr();
return m_pdr->get_proof();
default:
return proof_ref(m.mk_asserted(m.mk_true()), m);
}
}
void context::ensure_pdr() {
if (!m_pdr.get()) {
m_pdr = alloc(pdr::dl_interface, *this);
@ -1479,13 +1513,12 @@ namespace datalog {
case DATALOG_ENGINE:
return false;
case PDR_ENGINE:
m_pdr->display_certificate(out);
return true;
case QPDR_ENGINE:
ensure_pdr();
m_pdr->display_certificate(out);
return true;
case BMC_ENGINE:
case QBMC_ENGINE:
ensure_bmc();
m_bmc->display_certificate(out);
return true;
default:
@ -1493,20 +1526,31 @@ namespace datalog {
}
}
void context::reset_statistics() {
if (m_pdr) {
m_pdr->reset_statistics();
}
if (m_bmc) {
m_bmc->reset_statistics();
}
}
void context::collect_statistics(statistics& st) {
switch(get_engine()) {
void context::collect_statistics(statistics& st) const {
switch(m_engine) {
case DATALOG_ENGINE:
break;
case PDR_ENGINE:
m_pdr->collect_statistics(st);
break;
case QPDR_ENGINE:
m_pdr->collect_statistics(st);
if (m_pdr) {
m_pdr->collect_statistics(st);
}
break;
case BMC_ENGINE:
case QBMC_ENGINE:
m_bmc->collect_statistics(st);
if (m_bmc) {
m_bmc->collect_statistics(st);
}
break;
default:
break;
@ -1564,11 +1608,14 @@ namespace datalog {
expr* const* axioms = m_background.c_ptr();
expr_ref fml(m);
expr_ref_vector rules(m);
svector<symbol> names;
bool use_fixedpoint_extensions = m_params.get_bool(":print-with-fixedpoint-extensions", true);
{
rule_set::iterator it = m_rule_set.begin(), end = m_rule_set.end();
for (; it != end; ++it) {
(*it)->to_formula(fml);
rules.push_back(fml);
names.push_back((*it)->name());
}
}
@ -1586,13 +1633,17 @@ namespace datalog {
if (f->get_family_id() != null_family_id) {
//
}
else if (is_predicate(f)) {
else if (is_predicate(f) && use_fixedpoint_extensions) {
rels.insert(f);
}
else {
funcs.insert(f);
}
}
if (!use_fixedpoint_extensions) {
out << "(set-logic HORN)\n";
}
it = funcs.begin(), end = funcs.end();
@ -1619,23 +1670,51 @@ namespace datalog {
out << "))\n";
}
declare_vars(rules, fresh_names, out);
if (use_fixedpoint_extensions) {
declare_vars(rules, fresh_names, out);
}
for (unsigned i = 0; i < num_axioms; ++i) {
SASSERT(use_fixedpoint_extensions);
out << "(assert ";
ast_smt2_pp(out, axioms[i], env, params);
out << ")\n";
}
for (unsigned i = 0; i < rules.size(); ++i) {
out << "(rule ";
ast_smt2_pp(out, rules[i].get(), env, params);
for (unsigned i = 0; i < rules.size(); ++i) {
out << (use_fixedpoint_extensions?"(rule ":"(assert ");
expr* r = rules[i].get();
if (symbol::null != names[i]) {
out << "(! ";
}
if (use_fixedpoint_extensions) {
ast_smt2_pp(out, r, env, params);
}
else {
out << mk_smt_pp(r, m);
}
if (symbol::null != names[i]) {
out << " :named " << names[i] << ")";
}
out << ")\n";
}
for (unsigned i = 0; i < num_queries; ++i) {
out << "(query ";
ast_smt2_pp(out, queries[i], env, params);
out << ")\n";
if (use_fixedpoint_extensions) {
for (unsigned i = 0; i < num_queries; ++i) {
out << "(query ";
ast_smt2_pp(out, queries[i], env, params);
out << ")\n";
}
}
else {
for (unsigned i = 0; i < num_queries; ++i) {
if (num_queries > 1) out << "(push)\n";
out << "(assert ";
expr_ref q(m);
q = m.mk_not(queries[i]);
ast_smt2_pp(out, q, env, params);
out << ")\n";
out << "(check-sat)\n";
if (num_queries > 1) out << "(pop)\n";
}
}
}

23
src/muz_qe/dl_context.h
View file

@ -184,7 +184,7 @@ namespace datalog {
void register_variable(func_decl* var);
app_ref_vector const& get_variables() const { return m_vars; }
expr_ref bind_variables(expr* fml, bool is_forall);
/**
Register datalog relation.
@ -242,7 +242,7 @@ namespace datalog {
symbol get_argument_name(const func_decl * pred, unsigned arg_index);
void set_predicate_representation(func_decl * pred, unsigned relation_name_cnt,
symbol * const relation_names);
symbol const * relation_names);
void set_output_predicate(func_decl * pred);
bool is_output_predicate(func_decl * pred) { return m_output_preds.contains(pred); }
@ -383,6 +383,21 @@ namespace datalog {
lbool query(expr* q);
/**
\brief retrieve model from inductive invariant that shows query is unsat.
\pre engine == 'pdr' - this option is only supported for PDR mode.
*/
model_ref get_model();
/**
\brief retrieve proof from derivation of the query.
\pre engine == 'pdr' - this option is only supported for PDR mode.
*/
proof_ref get_proof();
/**
Query multiple output relations.
*/
@ -411,7 +426,9 @@ namespace datalog {
expr* get_answer_as_formula();
void collect_statistics(statistics& st);
void collect_statistics(statistics& st) const;
void reset_statistics();
/**
\brief Display a certificate for reachability and/or unreachability.

18
src/muz_qe/dl_mk_rule_inliner.cpp
View file

@ -116,16 +116,20 @@ namespace datalog {
apply(src, false, UINT_MAX, tail, tail_neg);
mk_rule_inliner::remove_duplicate_tails(tail, tail_neg);
SASSERT(tail.size()==tail_neg.size());
res = m_rm.mk(new_head, tail.size(), tail.c_ptr(), tail_neg.c_ptr());
res = m_rm.mk(new_head, tail.size(), tail.c_ptr(), tail_neg.c_ptr(), tgt.name(), m_normalize);
res->set_accounting_parent_object(m_context, const_cast<rule*>(&tgt));
res->norm_vars(m_rm);
m_rm.fix_unbound_vars(res, true);
if (m_interp_simplifier.transform_rule(res.get(), simpl_rule)) {
res = simpl_rule;
return true;
if (m_normalize) {
m_rm.fix_unbound_vars(res, true);
if (m_interp_simplifier.transform_rule(res.get(), simpl_rule)) {
res = simpl_rule;
return true;
}
else {
return false;
}
}
else {
return false;
return true;
}
}

10
src/muz_qe/dl_mk_rule_inliner.h
View file

@ -38,11 +38,12 @@ namespace datalog {
substitution m_subst;
unifier m_unif;
bool m_ready;
bool m_normalize;
unsigned m_deltas[2];
public:
rule_unifier(context& ctx)
: m(ctx.get_manager()), m_rm(ctx.get_rule_manager()), m_context(ctx),
m_interp_simplifier(ctx), m_subst(m), m_unif(m), m_ready(false) {}
m_interp_simplifier(ctx), m_subst(m), m_unif(m), m_ready(false), m_normalize(true) {}
/** Reset subtitution and unify tail tgt_idx of the target rule and the head of the src rule */
bool unify_rules(rule const& tgt, unsigned tgt_idx, rule const& src);
@ -60,6 +61,13 @@ namespace datalog {
*/
expr_ref_vector get_rule_subst(rule const& r, bool is_tgt);
/**
Control if bound variables are normalized after unification.
The default is 'true': bound variables are re-mapped to an
initial segment of de-Bruijn indices.
*/
void set_normalize(bool n) { m_normalize = n; }
private:
void apply(app * a, bool is_tgt, app_ref& res);

61
src/muz_qe/dl_rule.cpp
View file

@ -33,7 +33,6 @@ Revision History:
#include"for_each_expr.h"
#include"used_vars.h"
#include"var_subst.h"
#include"expr_abstract.h"
#include"rewriter_def.h"
#include"th_rewriter.h"
#include"ast_smt2_pp.h"
@ -291,30 +290,7 @@ namespace datalog {
}
void rule_manager::bind_variables(expr* fml, bool is_forall, expr_ref& result) {
app_ref_vector const& vars = m_ctx.get_variables();
if (vars.empty()) {
result = fml;
}
else {
ptr_vector<sort> sorts;
expr_abstract(m, 0, vars.size(), reinterpret_cast<expr*const*>(vars.c_ptr()), fml, result);
get_free_vars(result, sorts);
if (sorts.empty()) {
result = fml;
}
else {
svector<symbol> names;
for (unsigned i = 0; i < sorts.size(); ++i) {
if (!sorts[i]) {
sorts[i] = m.mk_bool_sort();
}
names.push_back(symbol(i));
}
quantifier_ref q(m);
q = m.mk_quantifier(is_forall, sorts.size(), sorts.c_ptr(), names.c_ptr(), result);
elim_unused_vars(m, q, result);
}
}
result = m_ctx.bind_variables(fml, is_forall);
}
void rule_manager::flatten_body(app_ref_vector& body) {
@ -526,7 +502,7 @@ namespace datalog {
}
}
rule * rule_manager::mk(app * head, unsigned n, app * const * tail, bool const * is_negated, symbol const& name) {
rule * rule_manager::mk(app * head, unsigned n, app * const * tail, bool const * is_negated, symbol const& name, bool normalize) {
DEBUG_CODE(check_valid_rule(head, n, tail););
unsigned sz = rule::get_obj_size(n);
void * mem = m.get_allocator().allocate(sz);
@ -588,7 +564,9 @@ namespace datalog {
r->m_positive_cnt = r->m_uninterp_cnt;
}
r->norm_vars(*this);
if (normalize) {
r->norm_vars(*this);
}
return r;
}
@ -823,7 +801,7 @@ namespace datalog {
new_tail.push_back(to_app(tmp));
tail_neg.push_back(r->is_neg_tail(i));
}
r = mk(new_head.get(), new_tail.size(), new_tail.c_ptr(), tail_neg.c_ptr(), r->name());
r = mk(new_head.get(), new_tail.size(), new_tail.c_ptr(), tail_neg.c_ptr(), r->name(), false);
// keep old variable indices around so we can compose with substitutions.
// r->norm_vars(*this);
@ -1068,24 +1046,25 @@ namespace datalog {
us(fml);
sorts.reverse();
for (unsigned i = 0; i < sorts.size(); ) {
for (unsigned i = 0; i < sorts.size(); ++i) {
if (!sorts[i]) {
sorts[i] = m.mk_bool_sort();
}
for (unsigned j = 0; i < sorts.size(); ++j) {
for (char c = 'A'; i < sorts.size() && c <= 'Z'; ++c) {
func_decl_ref f(m);
std::stringstream _name;
_name << c;
if (j > 0) _name << j;
symbol name(_name.str().c_str());
if (!us.contains(name)) {
names.push_back(name);
++i;
}
}
for (unsigned j = 0, i = 0; i < sorts.size(); ++j) {
for (char c = 'A'; i < sorts.size() && c <= 'Z'; ++c) {
func_decl_ref f(m);
std::stringstream _name;
_name << c;
if (j > 0) _name << j;
symbol name(_name.str().c_str());
if (!us.contains(name)) {
names.push_back(name);
++i;
}
}
}
}
fml = m.mk_forall(sorts.size(), sorts.c_ptr(), names.c_ptr(), fml);
}

4
src/muz_qe/dl_rule.h
View file

@ -116,7 +116,7 @@ namespace datalog {
\remark A tail may contain negation. tail[i] is assumed to be negated if is_neg != 0 && is_neg[i] == true
*/
rule * mk(app * head, unsigned n, app * const * tail, bool const * is_neg = 0,
symbol const& name = symbol::null);
symbol const& name = symbol::null, bool normalize = true);
/**
\brief Create a rule with the same tail as \c source and with a specified head.
@ -252,7 +252,7 @@ namespace datalog {
std::ostream& display_smt2(ast_manager& m, std::ostream & out) const;
symbol const& name() { return m_name; }
symbol const& name() const { return m_name; }
unsigned hash() const;

114
src/muz_qe/pdr_context.cpp
View file

@ -20,9 +20,6 @@ Revision History:
Notes:
TODO:
- fix the slicing with covers.
-
--*/
@ -101,6 +98,12 @@ namespace pdr {
}
st.update("PDR num properties", np);
}
void pred_transformer::reset_statistics() {
m_solver.reset_statistics();
m_reachable.reset_statistics();
m_stats.reset();
}
void pred_transformer::init_sig() {
if (m_sig.empty()) {
@ -972,6 +975,7 @@ namespace pdr {
proof_ref_vector trail(m);
datalog::rule_ref_vector rules_trail(rm);
proof* pr = 0;
unifier.set_normalize(false);
todo.push_back(m_root);
while (!todo.empty()) {
model_node* n = todo.back();
@ -1023,6 +1027,7 @@ namespace pdr {
binding_is_id = is_var(v) && to_var(v)->get_idx() == i;
}
if (rls.size() > 1 || !binding_is_id) {
expr_ref tmp(m);
vector<expr_ref_vector> substs;
svector<std::pair<unsigned,unsigned> > positions;
substs.push_back(binding); // TODO base substitution.
@ -1030,9 +1035,10 @@ namespace pdr {
datalog::rule& src = *rls[i];
bool unified = unifier.unify_rules(*reduced_rule, 0, src);
if (!unified) {
std::cout << "Could not unify rules: ";
reduced_rule->display(dctx, std::cout);
src.display(dctx, std::cout);
IF_VERBOSE(0,
verbose_stream() << "Could not unify rules: ";
reduced_rule->display(dctx, verbose_stream());
src.display(dctx, verbose_stream()););
}
expr_ref_vector sub1 = unifier.get_rule_subst(*reduced_rule, true);
TRACE("pdr",
@ -1041,8 +1047,15 @@ namespace pdr {
}
tout << "\n";
);
for (unsigned j = 0; j < substs.size(); ++j) {
// TODO. apply sub1 to subst.
for (unsigned k = 0; k < substs[j].size(); ++k) {
var_subst(m, false)(substs[j][k].get(), sub1.size(), sub1.c_ptr(), tmp);
substs[j][k] = tmp;
}
while (substs[j].size() < sub1.size()) {
substs[j].push_back(sub1[substs[j].size()].get());
}
}
positions.push_back(std::make_pair(i,0));
@ -1050,9 +1063,11 @@ namespace pdr {
VERIFY(unifier.apply(*reduced_rule.get(), 0, src, r3));
reduced_rule = r3;
}
expr_ref fml_concl(m);
reduced_rule->to_formula(fml_concl);
p1 = m.mk_hyper_resolve(pfs.size(), pfs.c_ptr(), fml_concl, positions, substs);
}
cache.insert(n->state(), p1);
rules.insert(n->state(), reduced_rule);
@ -1335,24 +1350,68 @@ namespace pdr {
if (!ok) {
IF_VERBOSE(0, verbose_stream() << "proof validation failed\n";);
}
for (unsigned i = 0; i < side_conditions.size(); ++i) {
expr* cond = side_conditions[i].get();
expr_ref tmp(m);
tmp = m.mk_not(cond);
IF_VERBOSE(2, verbose_stream() << "checking side-condition:\n" << mk_pp(cond, m) << "\n";);
smt::kernel solver(m, get_fparams());
solver.assert_expr(tmp);
lbool res = solver.check();
if (res != l_false) {
IF_VERBOSE(0, verbose_stream() << "rule validation failed\n";
verbose_stream() << mk_pp(cond, m) << "\n";
);
}
}
break;
}
case l_false: {
expr_ref_vector refs(m);
expr_ref_vector refs(m), fmls(m);
expr_ref tmp(m);
model_ref model;
vector<relation_info> rs;
model_converter_ref mc;
get_level_property(m_inductive_lvl, refs, rs);
inductive_property ex(m, const_cast<model_converter_ref&>(m_mc), rs);
inductive_property ex(m, mc, rs);
ex.to_model(model);
decl2rel::iterator it = m_rels.begin(), end = m_rels.end();
var_subst vs(m, false);
var_subst vs(m, false);
for (; it != end; ++it) {
ptr_vector<datalog::rule> const& rules = it->m_value->rules();
for (unsigned i = 0; i < rules.size(); ++i) {
// datalog::rule* rule = rules[i];
// vs(rule->get_head(),
// apply interpretation of predicates to rule.
// create formula and check for unsat.
datalog::rule& r = *rules[i];
model->eval(r.get_head(), tmp);
fmls.push_back(m.mk_not(tmp));
unsigned utsz = r.get_uninterpreted_tail_size();
unsigned tsz = r.get_tail_size();
for (unsigned j = 0; j < utsz; ++j) {
model->eval(r.get_tail(j), tmp);
fmls.push_back(tmp);
}
for (unsigned j = utsz; j < tsz; ++j) {
fmls.push_back(r.get_tail(j));
}
tmp = m.mk_and(fmls.size(), fmls.c_ptr());
ptr_vector<sort> sorts;
svector<symbol> names;
get_free_vars(tmp, sorts);
for (unsigned i = 0; i < sorts.size(); ++i) {
if (!sorts[i]) {
sorts[i] = m.mk_bool_sort();
}
names.push_back(symbol(i));
}
sorts.reverse();
tmp = m.mk_exists(sorts.size(), sorts.c_ptr(), names.c_ptr(), tmp);
smt::kernel solver(m, get_fparams());
solver.assert_expr(tmp);
lbool res = solver.check();
if (res != l_false) {
IF_VERBOSE(0, verbose_stream() << "rule validation failed\n";
verbose_stream() << mk_pp(tmp, m) << "\n";
);
}
}
}
break;
@ -1442,7 +1501,14 @@ namespace pdr {
simplify_formulas();
m_last_result = l_false;
TRACE("pdr", display_certificate(tout););
IF_VERBOSE(1, display_certificate(verbose_stream()););
IF_VERBOSE(1, {
expr_ref_vector refs(m);
vector<relation_info> rs;
get_level_property(m_inductive_lvl, refs, rs);
model_converter_ref mc;
inductive_property ex(m, mc, rs);
verbose_stream() << ex.to_string();
});
validate();
return l_false;
}
@ -1477,13 +1543,15 @@ namespace pdr {
}
}
void context::get_model(model_ref& md) {
model_ref context::get_model() {
SASSERT(m_last_result == l_false);
expr_ref_vector refs(m);
vector<relation_info> rs;
model_ref md;
get_level_property(m_inductive_lvl, refs, rs);
inductive_property ex(m, m_mc, rs);
ex.to_model(md);
return md;
}
proof_ref context::get_proof() const {
@ -1871,6 +1939,20 @@ namespace pdr {
}
}
void context::reset_statistics() {
decl2rel::iterator it = m_rels.begin(), end = m_rels.end();
for (it = m_rels.begin(); it != end; ++it) {
it->m_value->reset_statistics();
}
m_stats.reset();
m_pm.reset_statistics();
for (unsigned i = 0; i < m_core_generalizers.size(); ++i) {
m_core_generalizers[i]->reset_statistics();
}
}
std::ostream& context::display(std::ostream& out) const {
decl2rel::iterator it = m_rels.begin(), end = m_rels.end();

5
src/muz_qe/pdr_context.h
View file

@ -132,6 +132,7 @@ namespace pdr {
std::ostream& display(std::ostream& strm) const;
void collect_statistics(statistics& st) const;
void reset_statistics();
bool is_reachable(expr* state);
void remove_predecessors(expr_ref_vector& literals);
@ -275,6 +276,7 @@ namespace pdr {
}
}
virtual void collect_statistics(statistics& st) const {}
virtual void reset_statistics() {}
};
class context {
@ -366,6 +368,7 @@ namespace pdr {
void collect_statistics(statistics& st) const;
void reset_statistics();
std::ostream& display(std::ostream& strm) const;
@ -401,7 +404,7 @@ namespace pdr {
void add_cover(int level, func_decl* pred, expr* property);
void get_model(model_ref& md);
model_ref get_model();
proof_ref get_proof() const;

16
src/muz_qe/pdr_dl_interface.cpp
View file

@ -197,6 +197,10 @@ void dl_interface::collect_statistics(statistics& st) const {
m_context->collect_statistics(st);
}
void dl_interface::reset_statistics() {
m_context->reset_statistics();
}
void dl_interface::display_certificate(std::ostream& out) const {
m_context->display_certificate(out);
}
@ -218,6 +222,14 @@ void dl_interface::updt_params() {
m_context = alloc(pdr::context, m_ctx.get_fparams(), m_ctx.get_params(), m_ctx.get_manager());
}
model_ref dl_interface::get_model() {
return m_context->get_model();
}
proof_ref dl_interface::get_proof() {
return m_context->get_proof();
}
void dl_interface::collect_params(param_descrs& p) {
p.insert(":bfs-model-search", CPK_BOOL, "PDR: (default true) use BFS strategy for expanding model search");
p.insert(":use-farkas", CPK_BOOL, "PDR: (default true) use lemma generator based on Farkas (for linear real arithmetic)");
@ -239,8 +251,8 @@ void dl_interface::collect_params(param_descrs& p) {
"checking for reachability (not only during cube weakening)"););
PRIVATE_PARAMS(p.insert(":max-num-contexts", CPK_UINT, "PDR: (default 500) maximal number of contexts to create"););
PRIVATE_PARAMS(p.insert(":try-minimize-core", CPK_BOOL, "PDR: (default false) try to reduce core size (before inductive minimization)"););
PRIVATE_PARAMS(p.insert(":simplify-formulas-pre", CPK_BOOL, "PDR: (default false) simplify derived formulas before inductive propagation"););
PRIVATE_PARAMS(p.insert(":simplify-formulas-post", CPK_BOOL, "PDR: (default false) simplify derived formulas after inductive propagation"););
p.insert(":simplify-formulas-pre", CPK_BOOL, "PDR: (default false) simplify derived formulas before inductive propagation");
p.insert(":simplify-formulas-post", CPK_BOOL, "PDR: (default false) simplify derived formulas after inductive propagation");
p.insert(":slice", CPK_BOOL, "PDR: (default true) simplify clause set using slicing");
p.insert(":coalesce-rules", CPK_BOOL, "BMC: (default false) coalesce rules");
}

8
src/muz_qe/pdr_dl_interface.h
View file

@ -57,6 +57,8 @@ namespace pdr {
void collect_statistics(statistics& st) const;
void reset_statistics();
expr_ref get_answer();
unsigned get_num_levels(func_decl* pred);
@ -66,8 +68,12 @@ namespace pdr {
void add_cover(int level, func_decl* pred, expr* property);
static void collect_params(param_descrs& p);
void updt_params();
model_ref get_model();
proof_ref get_proof();
};
}

2
src/muz_qe/pdr_manager.h
View file

@ -313,6 +313,8 @@ namespace pdr {
pdr::smt_context* mk_fresh() { return m_contexts.mk_fresh(); }
void collect_statistics(statistics& st) const { m_contexts.collect_statistics(st); }
void reset_statistics() { m_contexts.reset_statistics(); }
};
}

8
src/muz_qe/pdr_prop_solver.cpp
View file

@ -364,8 +364,7 @@ namespace pdr {
m_core->append(lemmas);
}
lbool prop_solver::check_assumptions(const expr_ref_vector & atoms)
{
lbool prop_solver::check_assumptions(const expr_ref_vector & atoms) {
return check_assumptions_and_formula(atoms, m.mk_true());
}
@ -393,5 +392,10 @@ namespace pdr {
void prop_solver::collect_statistics(statistics& st) const {
}
void prop_solver::reset_statistics() {
}
}

2
src/muz_qe/pdr_prop_solver.h
View file

@ -122,6 +122,8 @@ namespace pdr {
expr * form);
void collect_statistics(statistics& st) const;
void reset_statistics();
};
}

19
src/muz_qe/pdr_reachable_cache.cpp
View file

@ -27,9 +27,6 @@ namespace pdr {
m_ctx(0),
m_ref_holder(m),
m_disj_connector(m),
m_cache_hits(0),
m_cache_miss(0),
m_cache_inserts(0),
m_cache_mode((datalog::PDR_CACHE_MODE)params.get_uint(":cache-mode",0)) {
if (m_cache_mode == datalog::CONSTRAINT_CACHE) {
m_ctx = pm.mk_fresh();
@ -63,13 +60,13 @@ namespace pdr {
break;
case datalog::HASH_CACHE:
m_cache_inserts++;
m_stats.m_inserts++;
m_cache.insert(cube);
m_ref_holder.push_back(cube);
break;
case datalog::CONSTRAINT_CACHE:
m_cache_inserts++;
m_stats.m_inserts++;
TRACE("pdr", tout << mk_pp(cube, m) << "\n";);
add_disjuncted_formula(cube);
break;
@ -112,14 +109,18 @@ namespace pdr {
UNREACHABLE();
break;
}
if (found) m_cache_hits++; m_cache_miss++;
if (found) m_stats.m_hits++; m_stats.m_miss++;
return found;
}
void reachable_cache::collect_statistics(statistics& st) const {
st.update("cache inserts", m_cache_inserts);
st.update("cache miss", m_cache_miss);
st.update("cache hits", m_cache_hits);
st.update("cache inserts", m_stats.m_inserts);
st.update("cache miss", m_stats.m_miss);
st.update("cache hits", m_stats.m_hits);
}
void reachable_cache::reset_statistics() {
m_stats.reset();
}

14
src/muz_qe/pdr_reachable_cache.h
View file

@ -28,15 +28,21 @@ Revision History:
namespace pdr {
class reachable_cache {
struct stats {
unsigned m_hits;
unsigned m_miss;
unsigned m_inserts;
stats() { reset(); }
void reset() { memset(this, 0, sizeof(*this)); }
};
ast_manager & m;
manager & m_pm;
scoped_ptr<smt_context> m_ctx;
ast_ref_vector m_ref_holder;
app_ref m_disj_connector;
obj_hashtable<expr> m_cache;
unsigned m_cache_hits;
unsigned m_cache_miss;
unsigned m_cache_inserts;
stats m_stats;
datalog::PDR_CACHE_MODE m_cache_mode;
void add_disjuncted_formula(expr * f);
@ -53,6 +59,8 @@ namespace pdr {
bool is_reachable(expr * cube);
void collect_statistics(statistics& st) const;
void reset_statistics();
};
}

6
src/muz_qe/pdr_smt_context_manager.cpp
View file

@ -136,6 +136,12 @@ namespace pdr {
}
}
void smt_context_manager::reset_statistics() {
for (unsigned i = 0; i < m_contexts.size(); ++i) {
m_contexts[i]->reset_statistics();
}
}
};

1
src/muz_qe/pdr_smt_context_manager.h
View file

@ -100,6 +100,7 @@ namespace pdr {
~smt_context_manager();
smt_context* mk_fresh();
void collect_statistics(statistics& st) const;
void reset_statistics();
bool is_aux_predicate(func_decl* p) const { return m_predicate_set.contains(p); }
};

286
src/muz_qe/pdr_tactic.cpp Normal file
View file

@ -0,0 +1,286 @@
/*++
Copyright (c) 2012 Microsoft Corporation
Module Name:
pdr_tactic.h
Abstract:
PDR as a tactic to solve Horn clauses.
Author:
Nikolaj Bjorner (nbjorner) 2012-11-16.
Revision History:
--*/
#include"tactical.h"
#include"model_converter.h"
#include"proof_converter.h"
#include"pdr_tactic.h"
#include"dl_context.h"
class pdr_tactic : public tactic {
struct imp {
ast_manager& m;
datalog::context m_ctx;
front_end_params m_fparams;
imp(ast_manager & m, params_ref const & p):
m(m),
m_ctx(m, m_fparams) {
updt_params(p);
}
void updt_params(params_ref const & p) {
m_ctx.updt_params(p);
}
void collect_param_descrs(param_descrs & r) {
m_ctx.collect_params(r);
}
void reset_statistics() {
m_ctx.reset_statistics();
}
void collect_statistics(statistics & st) const {
m_ctx.collect_statistics(st);
}
void set_cancel(bool f) {
if (f) {
m_ctx.cancel();
}
}
void normalize(expr_ref& f) {
bool is_positive = true;
expr* e = 0;
while (true) {
if (is_forall(f) && is_positive) {
f = to_quantifier(f)->get_expr();
}
else if (is_exists(f) && !is_positive) {
f = to_quantifier(f)->get_expr();
}
else if (m.is_not(f, e)) {
is_positive = !is_positive;
f = e;
}
else {
break;
}
}
if (!is_positive) {
f = m.mk_not(f);
}
}
bool is_predicate(expr* a) {
SASSERT(m.is_bool(a));
return is_app(a) && to_app(a)->get_decl()->get_family_id() == null_family_id;
}
void register_predicate(expr* a) {
SASSERT(is_predicate(a));
m_ctx.register_predicate(to_app(a)->get_decl(), true);
}
enum formula_kind { IS_RULE, IS_QUERY, IS_NONE };
formula_kind get_formula_kind(expr_ref& f) {
normalize(f);
expr_ref_vector args(m), body(m);
expr_ref head(m);
expr* a = 0, *a1 = 0;
datalog::flatten_or(f, args);
for (unsigned i = 0; i < args.size(); ++i) {
a = args[i].get();
if (m.is_not(a, a1) && is_predicate(a1)) {
register_predicate(a1);
body.push_back(a1);
}
else if (is_predicate(a)) {
register_predicate(a);
if (head) {
return IS_NONE;
}
head = a;
}
else if (m.is_not(a, a1)) {
body.push_back(a1);
}
else {
body.push_back(m.mk_not(a));
}
}
f = m.mk_and(body.size(), body.c_ptr());
if (head) {
f = m.mk_implies(f, head);
return IS_RULE;
}
else {
return IS_QUERY;
}
}
expr_ref mk_rule(expr* body, expr* head) {
return expr_ref(m.mk_implies(body, head), m);
}
void operator()(goal_ref const & g,
goal_ref_buffer & result,
model_converter_ref & mc,
proof_converter_ref & pc,
expr_dependency_ref & core) {
SASSERT(g->is_well_sorted());
mc = 0; pc = 0; core = 0;
tactic_report report("pdr", *g);
bool produce_models = g->models_enabled();
bool produce_proofs = g->proofs_enabled();
if (produce_proofs) {
if (!m_ctx.get_params().get_bool(":generate-proof-trace", true)) {
params_ref params = m_ctx.get_params();
params.set_bool(":generate-proof-trace", true);
updt_params(params);
}
}
unsigned sz = g->size();
expr_ref q(m), f(m);
expr_ref_vector queries(m);
std::stringstream msg;
for (unsigned i = 0; i < sz; i++) {
f = g->form(i);
formula_kind k = get_formula_kind(f);
switch(k) {
case IS_RULE:
m_ctx.add_rule(f, symbol::null);
break;
case IS_QUERY:
queries.push_back(f);
break;
default:
msg << "formula is not in Horn fragment: " << mk_pp(g->form(i), m) << "\n";
throw tactic_exception(msg.str().c_str());
}
}
if (queries.size() != 1) {
q = m.mk_fresh_const("query", m.mk_bool_sort());
for (unsigned i = 0; i < queries.size(); ++i) {
f = mk_rule(queries[i].get(), q);
m_ctx.add_rule(f, symbol::null);
}
queries.reset();
queries.push_back(q);
}
SASSERT(queries.size() == 1);
q = queries[0].get();
lbool is_reachable = m_ctx.query(q);
g->inc_depth();
result.push_back(g.get());
switch (is_reachable) {
case l_true: {
// goal is unsat
g->assert_expr(m.mk_false());
if (produce_proofs) {
proof_ref proof = m_ctx.get_proof();
pc = proof2proof_converter(m, proof);
}
break;
}
case l_false: {
// goal is sat
g->reset();
if (produce_models) {
model_ref md = m_ctx.get_model();
mc = model2model_converter(&*md);
}
break;
}
case l_undef:
// subgoal is unchanged.
break;
}
TRACE("pdr", g->display(tout););
SASSERT(g->is_well_sorted());
}
};
params_ref m_params;
imp * m_imp;
public:
pdr_tactic(ast_manager & m, params_ref const & p):
m_params(p) {
m_imp = alloc(imp, m, p);
}
virtual tactic * translate(ast_manager & m) {
return alloc(pdr_tactic, m, m_params);
}
virtual ~pdr_tactic() {
dealloc(m_imp);
}
virtual void updt_params(params_ref const & p) {
m_params = p;
m_imp->updt_params(p);
}
virtual void collect_param_descrs(param_descrs & r) {
m_imp->collect_param_descrs(r);
}
virtual void operator()(goal_ref const & in,
goal_ref_buffer & result,
model_converter_ref & mc,
proof_converter_ref & pc,
expr_dependency_ref & core) {
(*m_imp)(in, result, mc, pc, core);
}
virtual void collect_statistics(statistics & st) const {
m_imp->collect_statistics(st);
}
virtual void reset_statistics() {
m_imp->reset_statistics();
}
virtual void cleanup() {
ast_manager & m = m_imp->m;
imp * d = m_imp;
#pragma omp critical (tactic_cancel)
{
m_imp = 0;
}
dealloc(d);
d = alloc(imp, m, m_params);
#pragma omp critical (tactic_cancel)
{
m_imp = d;
}
}
protected:
virtual void set_cancel(bool f) {
if (m_imp)
m_imp->set_cancel(f);
}
};
tactic * mk_pdr_tactic(ast_manager & m, params_ref const & p) {
return clean(alloc(pdr_tactic, m, p));
}

30
src/muz_qe/pdr_tactic.h Normal file
View file

@ -0,0 +1,30 @@
/*++
Copyright (c) 2012 Microsoft Corporation
Module Name:
pdr_tactic.h
Abstract:
PDR as a tactic to solve Horn clauses.
Author:
Nikolaj Bjorner (nbjorner) 2012-11-16.
Revision History:
--*/
#ifndef _PDR_TACTIC_H_
#define _PDR_TACTIC_H_
#include"params.h"
class ast_manager;
class tactic;
tactic * mk_pdr_tactic(ast_manager & m, params_ref const & p = params_ref());
/*
ADD_TACTIC("pdr", "apply pdr for horn clauses.", "mk_pdr_tactic(m, p)")
*/
#endif

14
src/muz_qe/pdr_util.cpp
View file

@ -324,13 +324,12 @@ expr_ref_vector model_evaluator::prune_by_cone_of_influence(ptr_vector<expr> con
unsigned sz = m_model->get_num_constants();
expr_ref e(m), eq(m);
expr_ref_vector model(m);
bool_rewriter rw(m);
for (unsigned i = 0; i < sz; i++) {
func_decl * d = m_model->get_constant(i);
expr* val = m_model->get_const_interp(d);
e = m.mk_const(d);
if (m_visited.is_marked(e)) {
rw.mk_eq(e, val, eq);
eq = m.mk_eq(e, val);
model.push_back(eq);
}
}
@ -466,6 +465,7 @@ void model_evaluator::eval_arith(app* e) {
}
void model_evaluator::inherit_value(expr* e, expr* v) {
expr* w;
SASSERT(!is_unknown(v));
SASSERT(m.get_sort(e) == m.get_sort(v));
if (is_x(v)) {
@ -475,7 +475,10 @@ void model_evaluator::inherit_value(expr* e, expr* v) {
SASSERT(m.is_bool(v));
if (is_true(v)) set_true(e);
else if (is_false(v)) set_false(e);
else set_x(e);
else {
TRACE("pdr", tout << "not inherited:\n" << mk_pp(e, m) << "\n" << mk_pp(v, m) << "\n";);
set_x(e);
}
}
else if (m_arith.is_int_real(e)) {
set_number(e, get_number(v));
@ -483,7 +486,11 @@ void model_evaluator::inherit_value(expr* e, expr* v) {
else if (m.is_value(v)) {
set_value(e, v);
}
else if (m_values.find(v, w)) {
set_value(e, w);
}
else {
TRACE("pdr", tout << "not inherited:\n" << mk_pp(e, m) << "\n" << mk_pp(v, m) << "\n";);
set_x(e);
}
}
@ -642,6 +649,7 @@ void model_evaluator::eval_basic(app* e) {
set_bool(e, e1 == e2);
}
else {
TRACE("pdr", tout << "not value equal:\n" << mk_pp(e1, m) << "\n" << mk_pp(e2, m) << "\n";);
set_x(e);
}
}

4
src/muz_qe/proof_utils.cpp
View file

@ -223,7 +223,7 @@ public:
found_false = true;
break;
}
SASSERT(m.get_fact(tmp) == m.get_fact(m.get_parent(p, i)));
// SASSERT(m.get_fact(tmp) == m.get_fact(m.get_parent(p, i)));
parents.push_back(tmp);
if (is_closed(tmp) && !m_units.contains(m.get_fact(tmp))) {
m_units.insert(m.get_fact(tmp), tmp);
@ -283,7 +283,7 @@ public:
found_false = true;
break;
}
SASSERT(m.get_fact(tmp) == m.get_fact(m.get_parent(p, i)));
// SASSERT(m.get_fact(tmp) == m.get_fact(m.get_parent(p, i)));
change = change || (tmp != m.get_parent(p, i));
args.push_back(tmp);
}

0
src/ast/normal_forms/elim_term_ite.cpp → src/smt/elim_term_ite.cpp
View file

0
src/ast/normal_forms/elim_term_ite.h → src/smt/elim_term_ite.h
View file

3
src/tactic/portfolio/smt_strategic_solver.cpp
View file

@ -33,6 +33,7 @@ Notes:
#include"default_tactic.h"
#include"ufbv_tactic.h"
#include"qffpa_tactic.h"
#include"pdr_tactic.h"
#include"smt_solver.h"
MK_SIMPLE_TACTIC_FACTORY(qfuf_fct, mk_qfuf_tactic(m, p));
@ -54,6 +55,7 @@ MK_SIMPLE_TACTIC_FACTORY(qfnia_fct, mk_qfnia_tactic(m, p));
MK_SIMPLE_TACTIC_FACTORY(qfnra_fct, mk_qfnra_tactic(m, p));
MK_SIMPLE_TACTIC_FACTORY(qffpa_fct, mk_qffpa_tactic(m, p));
MK_SIMPLE_TACTIC_FACTORY(ufbv_fct, mk_ufbv_tactic(m, p));
MK_SIMPLE_TACTIC_FACTORY(horn_fct, mk_pdr_tactic(m, p));
static void init(strategic_solver * s) {
s->set_default_tactic(alloc(default_fct));
@ -77,6 +79,7 @@ static void init(strategic_solver * s) {
s->set_tactic_for(symbol("UFBV"), alloc(ufbv_fct));
s->set_tactic_for(symbol("BV"), alloc(ufbv_fct));
s->set_tactic_for(symbol("QF_FPA"), alloc(qffpa_fct));
s->set_tactic_for(symbol("HORN"), alloc(horn_fct));
}
solver * mk_smt_strategic_solver(bool force_tactic) {

4
src/tactic/tactical.cpp
View file

@ -549,7 +549,7 @@ public:
#ifdef _NO_OMP_
use_seq = true;
#else
use_seq = omp_in_parallel();
use_seq = 0 != omp_in_parallel();
#endif
if (use_seq) {
// execute tasks sequentially
@ -677,7 +677,7 @@ public:
#ifdef _NO_OMP_
use_seq = true;
#else
use_seq = omp_in_parallel();
use_seq = 0 != omp_in_parallel();
#endif
if (use_seq) {
// execute tasks sequentially

4
src/test/quant_elim.cpp
View file

@ -42,11 +42,11 @@ static void test_qe(ast_manager& m, lbool expected_outcome, expr* fml, char cons
qe(m.mk_true(), fml, result);
std::cout << " -> " << mk_pp(result, m) << " " << expected_outcome << "\n";
if (expected_outcome == l_true && !m.is_true(result)) {
std::cout << "ERROR: expected true, instead got " << ast_pp(result, m).c_str() << "\n";
std::cout << "ERROR: expected true, instead got " << mk_pp(result, m) << "\n";
//exit(-1);
}
if (expected_outcome == l_false && !m.is_false(result)) {
std::cout << "ERROR: expected false, instead got " << ast_pp(result, m).c_str() << "\n";
std::cout << "ERROR: expected false, instead got " << mk_pp(result, m) << "\n";
//exit(-1);
}
}

3
src/util/debug.h
View file

@ -98,6 +98,9 @@ private:
};
void finalize_debug();
/*
ADD_FINALIZER('finalize_debug();')
*/
#endif /* _DEBUG_H_ */

56
src/util/mem_stat.cpp
View file

@ -1,56 +0,0 @@
/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
mem_stat.cpp
Abstract:
Memory usage statistics
Author:
Leonardo de Moura (leonardo) 2006-11-09.
Revision History:
--*/
#ifdef _WINDOWS
#include<windows.h>
#include<cstdio>
#include<psapi.h>
double get_max_heap_size() {
DWORD processID = GetCurrentProcessId();
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID);
double result = -1.0;
if (NULL == hProcess) {
return -1.0;
}
if (GetProcessMemoryInfo( hProcess, &pmc, sizeof(pmc))) {
result = static_cast<double>(pmc.PeakWorkingSetSize) / static_cast<double>(1024*1024);
}
CloseHandle( hProcess );
return result;
}
#else
double get_max_heap_size() {
// not available in this platform
return -1.0;
}
#endif

25
src/util/mem_stat.h
View file

@ -1,25 +0,0 @@
/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
mem_stat.h
Abstract:
Memory usage statistics
Author:
Leonardo de Moura (leonardo) 2006-11-09.
Revision History:
--*/
#ifndef _MEM_STAT_H_
#define _MEM_STAT_H_
double get_max_heap_size();
#endif /* _MEM_STAT_H_ */

34
src/util/memory_manager.cpp
View file

@ -1,13 +1,27 @@
#include<iostream>
#include<stdlib.h>
#include"trace.h"
#include"memory_manager.h"
#include"rational.h"
#include"prime_generator.h"
#include"debug.h"
#include"error_codes.h"
// The following two function are automatically generated by the mk_make.py script.
// The script collects ADD_INITIALIZER and ADD_FINALIZER commands in the .h files.
// For example, rational.h contains
// ADD_INITIALIZER('rational::initialize();')
// ADD_FINALIZER('rational::finalize();')
// Thus, any executable or shared object (DLL) that depends on rational.h
// will have an automalically generated file mem_initializer.cpp containing
// mem_initialize()
// mem_finalize()
// and these functions will include the statements:
// rational::initialize();
//
// rational::finalize();
void mem_initialize();
void mem_finalize();
// If PROFILE_MEMORY is defined, Z3 will display the amount of memory used, and the number of synchronization steps during finalization
// #define PROFILE_MEMORY
void initialize_symbols();
void finalize_symbols();
out_of_memory_error::out_of_memory_error():z3_error(ERR_MEMOUT) {
}
@ -58,8 +72,7 @@ mem_usage_report g_info;
void memory::initialize(size_t max_size) {
g_memory_out_of_memory = false;
g_memory_max_size = max_size;
rational::initialize();
initialize_symbols();
mem_initialize();
}
bool memory::is_out_of_memory() {
@ -96,14 +109,9 @@ static bool g_finalizing = false;
void memory::finalize() {
g_finalizing = true;
finalize_debug();
finalize_trace();
finalize_symbols();
rational::finalize();
prime_iterator::finalize();
mem_finalize();
}
unsigned long long memory::get_allocation_size() {
long long r;
#pragma omp critical (z3_memory_manager)

3
src/util/prime_generator.h
View file

@ -48,6 +48,9 @@ public:
prime_iterator(prime_generator * g = 0);
uint64 next();
static void finalize();
/*
ADD_FINALIZER('prime_iterator::finalize();')
*/
};
#endif

5
src/util/rational.h
View file

@ -35,7 +35,10 @@ public:
static void initialize();
static void finalize();
/*
ADD_INITIALIZER('rational::initialize();')
ADD_FINALIZER('rational::finalize();')
*/
rational() {}
rational(rational const & r) { m().set(m_val, r.m_val); }

4
src/util/symbol.h
View file

@ -141,6 +141,10 @@ struct symbol_eq_proc {
void initialize_symbols();
void finalize_symbols();
/*
ADD_INITIALIZER('initialize_symbols();')
ADD_FINALIZER('finalize_symbols();')
*/
// total order on symbols... I did not overloaded '<' to avoid misunderstandings.
// numerical symbols are smaller than non numerical symbols.

3
src/util/trace.h
View file

@ -40,6 +40,9 @@ bool is_trace_enabled(const char * tag);
void close_trace();
void open_trace();
void finalize_trace();
/*
ADD_FINALIZER('finalize_trace();')
*/
#define TRACE(TAG, CODE) TRACE_CODE(if (is_trace_enabled(TAG)) { tout << "-------- [" << TAG << "] " << __FUNCTION__ << " " << __FILE__ << ":" << __LINE__ << " ---------\n"; CODE tout << "------------------------------------------------\n"; tout.flush(); })