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Merge remote-tracking branch 'upstream/master' into release-1.0

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This commit is contained in:
Murphy Berzish 2017-02-28 12:45:04 -05:00
commit 9ac0d098ac
16 changed files with 268 additions and 71 deletions
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28
src/api/api_opt.cpp
View file

@ -218,6 +218,34 @@ extern "C" {
Z3_CATCH_RETURN(0);
}
// get lower value or current approximation
Z3_ast_vector Z3_API Z3_optimize_get_lower_as_vector(Z3_context c, Z3_optimize o, unsigned idx) {
Z3_TRY;
LOG_Z3_optimize_get_lower_as_vector(c, o, idx);
RESET_ERROR_CODE();
expr_ref_vector es(mk_c(c)->m());
to_optimize_ptr(o)->get_lower(idx, es);
Z3_ast_vector_ref * v = alloc(Z3_ast_vector_ref, *mk_c(c), mk_c(c)->m());
mk_c(c)->save_object(v);
v->m_ast_vector.append(es.size(), (ast*const*)es.c_ptr());
RETURN_Z3(of_ast_vector(v));
Z3_CATCH_RETURN(0);
}
// get upper or current approximation
Z3_ast_vector Z3_API Z3_optimize_get_upper_as_vector(Z3_context c, Z3_optimize o, unsigned idx) {
Z3_TRY;
LOG_Z3_optimize_get_upper_as_vector(c, o, idx);
RESET_ERROR_CODE();
expr_ref_vector es(mk_c(c)->m());
to_optimize_ptr(o)->get_upper(idx, es);
Z3_ast_vector_ref * v = alloc(Z3_ast_vector_ref, *mk_c(c), mk_c(c)->m());
mk_c(c)->save_object(v);
v->m_ast_vector.append(es.size(), (ast*const*)es.c_ptr());
RETURN_Z3(of_ast_vector(v));
Z3_CATCH_RETURN(0);
}
Z3_string Z3_API Z3_optimize_to_string(Z3_context c, Z3_optimize o) {
Z3_TRY;
LOG_Z3_optimize_to_string(c, o);

36
src/api/dotnet/Optimize.cs
View file

@ -144,6 +144,23 @@ namespace Microsoft.Z3
{
get { return Lower; }
}
/// <summary>
/// Retrieve a lower bound for the objective handle.
/// </summary>
public ArithExpr[] LowerAsVector
{
get { return opt.GetLowerAsVector(handle); }
}
/// <summary>
/// Retrieve an upper bound for the objective handle.
/// </summary>
public ArithExpr[] UpperAsVector
{
get { return opt.GetUpperAsVector(handle); }
}
}
/// <summary>
@ -255,6 +272,25 @@ namespace Microsoft.Z3
return (ArithExpr)Expr.Create(Context, Native.Z3_optimize_get_upper(Context.nCtx, NativeObject, index));
}
/// <summary>
/// Retrieve a lower bound for the objective handle.
/// </summary>
private ArithExpr[] GetLowerAsVector(uint index)
{
ASTVector v = new ASTVector(Context, Native.Z3_optimize_get_lower_as_vector(Context.nCtx, NativeObject, index));
return v.ToArithExprArray();
}
/// <summary>
/// Retrieve an upper bound for the objective handle.
/// </summary>
private ArithExpr[] GetUpperAsVector(uint index)
{
ASTVector v = new ASTVector(Context, Native.Z3_optimize_get_upper_as_vector(Context.nCtx, NativeObject, index));
return v.ToArithExprArray();
}
/// <summary>
/// Return a string the describes why the last to check returned unknown
/// </summary>

184
src/api/java/Optimize.java
View file

@ -14,7 +14,6 @@ Author:
Nikolaj Bjorner (nbjorner) 2015-07-16
Notes:
**/
package com.microsoft.z3;
@ -23,10 +22,10 @@ import com.microsoft.z3.enumerations.Z3_lbool;
/**
* Object for managing optimizization context
* Object for managing optimization context
**/
public class Optimize extends Z3Object
{
public class Optimize extends Z3Object {
/**
* A string that describes all available optimize solver parameters.
**/
@ -55,7 +54,7 @@ public class Optimize extends Z3Object
/**
* Assert a constraint (or multiple) into the optimize solver.
**/
**/
public void Assert(BoolExpr ... constraints)
{
getContext().checkContextMatch(constraints);
@ -67,80 +66,101 @@ public class Optimize extends Z3Object
/**
* Alias for Assert.
**/
**/
public void Add(BoolExpr ... constraints)
{
Assert(constraints);
Assert(constraints);
}
/**
* Handle to objectives returned by objective functions.
**/
public class Handle
{
Optimize opt;
int handle;
Handle(Optimize opt, int h)
{
this.opt = opt;
this.handle = h;
}
/**
* Retrieve a lower bound for the objective handle.
**/
public ArithExpr getLower()
{
return opt.GetLower(handle);
}
/**
* Retrieve an upper bound for the objective handle.
**/
public ArithExpr getUpper()
{
return opt.GetUpper(handle);
}
/**
* Retrieve the value of an objective.
**/
public ArithExpr getValue()
{
return getLower();
}
public static class Handle {
/**
* Print a string representation of the handle.
**/
@Override
public String toString()
private final Optimize opt;
private final int handle;
Handle(Optimize opt, int h)
{
this.opt = opt;
this.handle = h;
}
/**
* Retrieve a lower bound for the objective handle.
**/
public ArithExpr getLower()
{
return opt.GetLower(handle);
}
/**
* Retrieve an upper bound for the objective handle.
**/
public ArithExpr getUpper()
{
return opt.GetUpper(handle);
}
/**
* @return a triple representing the upper bound of the objective handle.
*
* The triple contains values {@code inf, value, eps},
* where the objective value is unbounded iff {@code inf} is non-zero,
* and otherwise is represented by the expression {@code value + eps * EPSILON},
* where {@code EPSILON} is an arbitrarily small real number.
*/
public ArithExpr[] getUpperAsVector()
{
return opt.GetUpperAsVector(handle);
}
/**
* @return a triple representing the upper bound of the objective handle.
*
* <p>See {@link #getUpperAsVector()} for triple semantics.
*/
public ArithExpr[] getLowerAsVector()
{
return opt.GetLowerAsVector(handle);
}
/**
* Retrieve the value of an objective.
**/
public ArithExpr getValue()
{
return getLower();
}
/**
* Print a string representation of the handle.
**/
@Override
public String toString()
{
return getValue().toString();
}
}
/**
/**
* Assert soft constraint
*
* Return an objective which associates with the group of constraints.
*
**/
**/
public Handle AssertSoft(BoolExpr constraint, int weight, String group)
{
getContext().checkContextMatch(constraint);
Symbol s = getContext().mkSymbol(group);
return new Handle(this, Native.optimizeAssertSoft(getContext().nCtx(), getNativeObject(), constraint.getNativeObject(), Integer.toString(weight), s.getNativeObject()));
}
/**
/**
* Check satisfiability of asserted constraints.
* Produce a model that (when the objectives are bounded and
* don't use strict inequalities) meets the objectives.
**/
public Status Check()
{
Z3_lbool r = Z3_lbool.fromInt(Native.optimizeCheck(getContext().nCtx(), getNativeObject()));
@ -153,7 +173,7 @@ public class Optimize extends Z3Object
return Status.UNKNOWN;
}
}
/**
* Creates a backtracking point.
**/
@ -162,13 +182,11 @@ public class Optimize extends Z3Object
Native.optimizePush(getContext().nCtx(), getNativeObject());
}
/**
/**
* Backtrack one backtracking point.
*
* Note that an exception is thrown if Pop is called without a corresponding Push.
**/
public void Pop()
{
Native.optimizePop(getContext().nCtx(), getNativeObject());
@ -191,7 +209,7 @@ public class Optimize extends Z3Object
}
}
/**
/**
* Declare an arithmetical maximization objective.
* Return a handle to the objective. The handle is used as
* to retrieve the values of objectives after calling Check.
@ -200,11 +218,11 @@ public class Optimize extends Z3Object
{
return new Handle(this, Native.optimizeMaximize(getContext().nCtx(), getNativeObject(), e.getNativeObject()));
}
/**
* Declare an arithmetical minimization objective.
* Similar to MkMaximize.
**/
**/
public Handle MkMinimize(ArithExpr e)
{
return new Handle(this, Native.optimizeMinimize(getContext().nCtx(), getNativeObject(), e.getNativeObject()));
@ -212,21 +230,56 @@ public class Optimize extends Z3Object
/**
* Retrieve a lower bound for the objective handle.
**/
**/
private ArithExpr GetLower(int index)
{
return (ArithExpr)Expr.create(getContext(), Native.optimizeGetLower(getContext().nCtx(), getNativeObject(), index));
}
/**
* Retrieve an upper bound for the objective handle.
**/
**/
private ArithExpr GetUpper(int index)
{
return (ArithExpr)Expr.create(getContext(), Native.optimizeGetUpper(getContext().nCtx(), getNativeObject(), index));
}
/**
* @return Triple representing the upper bound for the objective handle.
*
* <p>See {@link Handle#getUpperAsVector}.
*/
private ArithExpr[] GetUpperAsVector(int index) {
return unpackObjectiveValueVector(
Native.optimizeGetUpperAsVector(
getContext().nCtx(), getNativeObject(), index
)
);
}
/**
* @return Triple representing the upper bound for the objective handle.
*
* <p>See {@link Handle#getLowerAsVector}.
*/
private ArithExpr[] GetLowerAsVector(int index) {
return unpackObjectiveValueVector(
Native.optimizeGetLowerAsVector(
getContext().nCtx(), getNativeObject(), index
)
);
}
private ArithExpr[] unpackObjectiveValueVector(long nativeVec) {
ASTVector vec = new ASTVector(
getContext(), nativeVec
);
return new ArithExpr[] {
(ArithExpr) vec.get(0), (ArithExpr) vec.get(1), (ArithExpr) vec.get(2)
};
}
/**
* Return a string the describes why the last to check returned unknown
**/
@ -235,8 +288,7 @@ public class Optimize extends Z3Object
return Native.optimizeGetReasonUnknown(getContext().nCtx(),
getNativeObject());
}
/**
* Print the context to a String (SMT-LIB parseable benchmark).
**/
@ -245,7 +297,7 @@ public class Optimize extends Z3Object
{
return Native.optimizeToString(getContext().nCtx(), getNativeObject());
}
/**
* Optimize statistics.
**/

22
src/api/python/z3/z3.py
View file

@ -6719,12 +6719,24 @@ class OptimizeObjective:
opt = self._opt
return _to_expr_ref(Z3_optimize_get_upper(opt.ctx.ref(), opt.optimize, self._value), opt.ctx)
def lower_values(self):
opt = self._opt
return AstVector(Z3_optimize_get_lower_as_vector(opt.ctx.ref(), opt.optimize, self._value), opt.ctx)
def upper_values(self):
opt = self._opt
return AstVector(Z3_optimize_get_upper_as_vector(opt.ctx.ref(), opt.optimize, self._value), opt.ctx)
def value(self):
if self._is_max:
return self.upper()
else:
return self.lower()
def __str__(self):
return "%s:%s" % (self._value, self._is_max)
class Optimize(Z3PPObject):
"""Optimize API provides methods for solving using objective functions and weighted soft constraints"""
@ -6829,6 +6841,16 @@ class Optimize(Z3PPObject):
raise Z3Exception("Expecting objective handle returned by maximize/minimize")
return obj.upper()
def lower_values(self, obj):
if not isinstance(obj, OptimizeObjective):
raise Z3Exception("Expecting objective handle returned by maximize/minimize")
return obj.lower_values()
def upper_values(self, obj):
if not isinstance(obj, OptimizeObjective):
raise Z3Exception("Expecting objective handle returned by maximize/minimize")
return obj.upper_values()
def from_file(self, filename):
"""Parse assertions and objectives from a file"""
Z3_optimize_from_file(self.ctx.ref(), self.optimize, filename)

27
src/api/z3_optimization.h
View file

@ -186,6 +186,33 @@ extern "C" {
*/
Z3_ast Z3_API Z3_optimize_get_upper(Z3_context c, Z3_optimize o, unsigned idx);
/**
\brief Retrieve lower bound value or approximation for the i'th optimization objective.
The returned vector is of length 3. It always contains numerals.
The three numerals are coefficients a, b, c and encode the result of \c Z3_optimize_get_lower
a * infinity + b + c * epsilon.
\param c - context
\param o - optimization context
\param idx - index of optimization objective
def_API('Z3_optimize_get_lower_as_vector', AST_VECTOR, (_in(CONTEXT), _in(OPTIMIZE), _in(UINT)))
*/
Z3_ast_vector Z3_API Z3_optimize_get_lower_as_vector(Z3_context c, Z3_optimize o, unsigned idx);
/**
\brief Retrieve upper bound value or approximation for the i'th optimization objective.
\param c - context
\param o - optimization context
\param idx - index of optimization objective
def_API('Z3_optimize_get_upper_as_vector', AST_VECTOR, (_in(CONTEXT), _in(OPTIMIZE), _in(UINT)))
*/
Z3_ast_vector Z3_API Z3_optimize_get_upper_as_vector(Z3_context c, Z3_optimize o, unsigned idx);
/**
\brief Print the current context as a string.
\param c - context.

2
src/ast/rewriter/enum2bv_rewriter.cpp
View file

@ -85,7 +85,7 @@ struct enum2bv_rewriter::imp {
void throw_non_fd(expr* e) {
std::stringstream strm;
strm << "unabled nested data-type expression " << mk_pp(e, m);
strm << "unable to handle nested data-type expression " << mk_pp(e, m);
throw rewriter_exception(strm.str().c_str());
}

5
src/ast/seq_decl_plugin.cpp
View file

@ -473,6 +473,7 @@ void seq_decl_plugin::init() {
sort* str2TintT[3] = { strT, strT, intT };
sort* seqAintT[2] = { seqA, intT };
sort* seq3A[3] = { seqA, seqA, seqA };
sort* reTintT[2] = { reT, intT };
m_sigs.resize(LAST_SEQ_OP);
// TBD: have (par ..) construct and load parameterized signature from premable.
m_sigs[OP_SEQ_UNIT] = alloc(psig, m, "seq.unit", 1, 1, &A, seqA);
@ -516,6 +517,7 @@ void seq_decl_plugin::init() {
m_sigs[_OP_REGEXP_EMPTY] = alloc(psig, m, "re.nostr", 0, 0, 0, reT);
m_sigs[_OP_REGEXP_FULL] = alloc(psig, m, "re.allchar", 0, 0, 0, reT);
m_sigs[_OP_STRING_SUBSTR] = alloc(psig, m, "str.substr", 0, 3, strTint2T, strT);
m_sigs[_OP_RE_UNROLL] = alloc(psig, m, "_re.unroll", 0, 2, reTintT, strT);
}
void seq_decl_plugin::set_manager(ast_manager* m, family_id id) {
@ -672,6 +674,9 @@ func_decl * seq_decl_plugin::mk_func_decl(decl_kind k, unsigned num_parameters,
m.raise_exception("Incorrect number of arguments passed to loop. Expected 1 regular expression and two integer parameters");
}
case _OP_RE_UNROLL:
match(*m_sigs[k], arity, domain, range, rng);
return m.mk_func_decl(m_sigs[k]->m_name, arity, domain, rng, func_decl_info(m_family_id, k));
case OP_STRING_CONST:
if (!(num_parameters == 1 && arity == 0 && parameters[0].is_symbol())) {

2
src/ast/seq_decl_plugin.h
View file

@ -79,6 +79,7 @@ enum seq_op_kind {
_OP_REGEXP_EMPTY,
_OP_REGEXP_FULL,
_OP_SEQ_SKOLEM,
_OP_RE_UNROLL,
LAST_SEQ_OP
};
@ -334,6 +335,7 @@ public:
MATCH_UNARY(is_opt);
bool is_loop(expr const* n, expr*& body, unsigned& lo, unsigned& hi);
bool is_loop(expr const* n, expr*& body, unsigned& lo);
bool is_unroll(expr const* n) const { return is_app_of(n, m_fid, _OP_RE_UNROLL); }
};
str str;
re re;

2
src/cmd_context/tactic_cmds.cpp
View file

@ -223,7 +223,7 @@ public:
cmd_context::scoped_watch sw(ctx);
lbool r = l_undef;
try {
r = check_sat(t, g, md, result->labels, pr, core, reason_unknown);
r = check_sat(t, g, md, result->labels, pr, core, reason_unknown);
ctx.display_sat_result(r);
result->set_status(r);
if (r == l_undef) {

12
src/opt/opt_context.cpp
View file

@ -1290,6 +1290,15 @@ namespace opt {
return to_expr(get_upper_as_num(idx));
}
void context::to_exprs(inf_eps const& n, expr_ref_vector& es) {
rational inf = n.get_infinity();
rational r = n.get_rational();
rational eps = n.get_infinitesimal();
es.push_back(m_arith.mk_numeral(inf, inf.is_int()));
es.push_back(m_arith.mk_numeral(r, r.is_int()));
es.push_back(m_arith.mk_numeral(eps, eps.is_int()));
}
expr_ref context::to_expr(inf_eps const& n) {
rational inf = n.get_infinity();
rational r = n.get_rational();
@ -1455,9 +1464,10 @@ namespace opt {
void context::validate_maxsat(symbol const& id) {
maxsmt& ms = *m_maxsmts.find(id);
TRACE("opt", tout << "Validate: " << id << "\n";);
for (unsigned i = 0; i < m_objectives.size(); ++i) {
objective const& obj = m_objectives[i];
if (obj.m_id == id) {
if (obj.m_id == id && obj.m_type == O_MAXSMT) {
SASSERT(obj.m_type == O_MAXSMT);
rational value(0);
expr_ref val(m);

4
src/opt/opt_context.h
View file

@ -207,6 +207,9 @@ namespace opt {
expr_ref get_lower(unsigned idx);
expr_ref get_upper(unsigned idx);
void get_lower(unsigned idx, expr_ref_vector& es) { to_exprs(get_lower_as_num(idx), es); }
void get_upper(unsigned idx, expr_ref_vector& es) { to_exprs(get_upper_as_num(idx), es); }
std::string to_string() const;
@ -238,6 +241,7 @@ namespace opt {
lbool adjust_unknown(lbool r);
bool scoped_lex();
expr_ref to_expr(inf_eps const& n);
void to_exprs(inf_eps const& n, expr_ref_vector& es);
void reset_maxsmts();
void import_scoped_state();

5
src/smt/tactic/smt_tactic.cpp
View file

@ -25,6 +25,9 @@ Notes:
#include"filter_model_converter.h"
#include"ast_util.h"
#include"solver2tactic.h"
#include"smt_solver.h"
#include"solver.h"
#include"mus.h"
typedef obj_map<expr, expr *> expr2expr_map;
@ -159,6 +162,8 @@ public:
ref<filter_model_converter> fmc;
if (in->unsat_core_enabled()) {
extract_clauses_and_dependencies(in, clauses, assumptions, bool2dep, fmc);
TRACE("mus", in->display_with_dependencies(tout);
tout << clauses << "\n";);
if (in->proofs_enabled() && !assumptions.empty())
throw tactic_exception("smt tactic does not support simultaneous generation of proofs and unsat cores");
for (unsigned i = 0; i < clauses.size(); ++i) {

1
src/solver/mus.cpp
View file

@ -89,6 +89,7 @@ struct mus::imp {
lbool get_mus1(expr_ref_vector& mus) {
ptr_vector<expr> unknown(m_lit2expr.size(), m_lit2expr.c_ptr());
ptr_vector<expr> core_exprs;
TRACE("mus", m_solver.display(tout););
while (!unknown.empty()) {
IF_VERBOSE(12, verbose_stream() << "(mus reducing core: " << unknown.size() << " new core: " << mus.size() << ")\n";);
TRACE("mus", display_vec(tout << "core: ", unknown); display_vec(tout << "mus: ", mus););

2
src/solver/tactic2solver.cpp
View file

@ -290,3 +290,5 @@ solver_factory * mk_tactic2solver_factory(tactic * t) {
solver_factory * mk_tactic_factory2solver_factory(tactic_factory * f) {
return alloc(tactic_factory2solver_factory, f);
}

5
src/tactic/bv/dt2bv_tactic.cpp
View file

@ -64,7 +64,10 @@ class dt2bv_tactic : public tactic {
return;
}
if (m_t.is_fd(a)) {
if (m_t.is_fd(a) && a->get_num_args() > 0) {
m_t.m_non_fd_sorts.insert(get_sort(a));
}
else if (m_t.is_fd(a)) {
m_t.m_fd_sorts.insert(get_sort(a));
}
else {

2
src/tactic/tactic.cpp
View file

@ -23,7 +23,6 @@ Notes:
#include"model_v2_pp.h"
struct tactic_report::imp {
char const * m_id;
goal const & m_goal;
@ -175,6 +174,7 @@ void exec(tactic & t, goal_ref const & in, goal_ref_buffer & result, model_conve
}
}
lbool check_sat(tactic & t, goal_ref & g, model_ref & md, labels_vec & labels, proof_ref & pr, expr_dependency_ref & core, std::string & reason_unknown) {
bool models_enabled = g->models_enabled();
bool proofs_enabled = g->proofs_enabled();