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include special functionality in parsers for solvers and opt for additional file formats

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-12-03 20:00:24 +01:00
parent 187998ae4d
commit 5ee30a3cd9
12 changed files with 324 additions and 303 deletions
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42
src/api/api_opt.cpp
View file

@ -16,17 +16,19 @@ Revision History:
--*/
#include<iostream>
#include "util/cancel_eh.h"
#include "util/file_path.h"
#include "util/scoped_timer.h"
#include "parsers/smt2/smt2parser.h"
#include "opt/opt_context.h"
#include "opt/opt_cmds.h"
#include "opt/opt_parse.h"
#include "api/z3.h"
#include "api/api_log_macros.h"
#include "api/api_stats.h"
#include "api/api_context.h"
#include "api/api_util.h"
#include "api/api_model.h"
#include "opt/opt_context.h"
#include "opt/opt_cmds.h"
#include "util/cancel_eh.h"
#include "util/scoped_timer.h"
#include "parsers/smt2/smt2parser.h"
#include "api/api_ast_vector.h"
extern "C" {
@ -281,16 +283,27 @@ extern "C" {
static void Z3_optimize_from_stream(
Z3_context c,
Z3_optimize opt,
std::istream& s) {
ast_manager& m = mk_c(c)->m();
std::istream& s,
char const* ext) {
ast_manager& m = mk_c(c)->m();
if (ext && std::string("opb") == ext) {
unsigned_vector h;
parse_opb(*to_optimize_ptr(opt), s, h);
return;
}
if (ext && std::string("wcnf") == ext) {
unsigned_vector h;
parse_wcnf(*to_optimize_ptr(opt), s, h);
return;
}
scoped_ptr<cmd_context> ctx = alloc(cmd_context, false, &m);
install_opt_cmds(*ctx.get(), to_optimize_ptr(opt));
ctx->set_ignore_check(true);
std::stringstream errstrm;
ctx->set_regular_stream(errstrm);
ctx->set_ignore_check(true);
try {
if (!parse_smt2_commands(*ctx.get(), s)) {
mk_c(c)->m_parser_error_buffer = errstrm.str();
mk_c(c)->m_parser_error_buffer = errstrm.str();
ctx = nullptr;
SET_ERROR_CODE(Z3_PARSER_ERROR);
return;
@ -303,6 +316,7 @@ extern "C" {
SET_ERROR_CODE(Z3_PARSER_ERROR);
return;
}
ptr_vector<expr>::const_iterator it = ctx->begin_assertions();
ptr_vector<expr>::const_iterator end = ctx->end_assertions();
for (; it != end; ++it) {
@ -310,6 +324,8 @@ extern "C" {
}
}
void Z3_API Z3_optimize_from_string(
Z3_context c,
Z3_optimize d,
@ -318,7 +334,7 @@ extern "C" {
//LOG_Z3_optimize_from_string(c, d, s);
std::string str(s);
std::istringstream is(str);
Z3_optimize_from_stream(c, d, is);
Z3_optimize_from_stream(c, d, is, nullptr);
Z3_CATCH;
}
@ -334,7 +350,7 @@ extern "C" {
strm << "Could not open file " << s;
throw default_exception(strm.str());
}
Z3_optimize_from_stream(c, d, is);
Z3_optimize_from_stream(c, d, is, get_extension(s));
Z3_CATCH;
}
@ -347,8 +363,8 @@ extern "C" {
mk_c(c)->save_object(v);
expr_ref_vector hard(mk_c(c)->m());
to_optimize_ptr(o)->get_hard_constraints(hard);
for (unsigned i = 0; i < hard.size(); i++) {
v->m_ast_vector.push_back(hard[i].get());
for (expr* h : hard) {
v->m_ast_vector.push_back(h);
}
RETURN_Z3(of_ast_vector(v));
Z3_CATCH_RETURN(0);

63
src/api/api_solver.cpp
View file

@ -28,11 +28,17 @@ Revision History:
#include "solver/tactic2solver.h"
#include "util/scoped_ctrl_c.h"
#include "util/cancel_eh.h"
#include "util/file_path.h"
#include "util/scoped_timer.h"
#include "tactic/portfolio/smt_strategic_solver.h"
#include "smt/smt_solver.h"
#include "smt/smt_implied_equalities.h"
#include "solver/smt_logics.h"
#include "cmd_context/cmd_context.h"
#include "parsers/smt2/smt2parser.h"
#include "sat/dimacs.h"
#include "sat/sat_solver.h"
#include "sat/tactic/goal2sat.h"
extern "C" {
@ -121,6 +127,63 @@ extern "C" {
Z3_CATCH_RETURN(0);
}
void solver_from_stream(Z3_context c, Z3_solver s, std::istream& is) {
scoped_ptr<cmd_context> ctx = alloc(cmd_context, false, &(mk_c(c)->m()));
ctx->set_ignore_check(true);
if (!parse_smt2_commands(*ctx.get(), is)) {
ctx = nullptr;
SET_ERROR_CODE(Z3_PARSER_ERROR);
return;
}
bool initialized = to_solver(s)->m_solver.get() != 0;
if (!initialized)
init_solver(c, s);
ptr_vector<expr>::const_iterator it = ctx->begin_assertions();
ptr_vector<expr>::const_iterator end = ctx->end_assertions();
for (; it != end; ++it) {
to_solver_ref(s)->assert_expr(*it);
}
// to_solver_ref(s)->set_model_converter(ctx->get_model_converter());
}
void Z3_API Z3_solver_from_string(Z3_context c, Z3_solver s, Z3_string c_str) {
Z3_TRY;
LOG_Z3_solver_from_string(c, s, c_str);
std::string str(c_str);
std::istringstream is(str);
solver_from_stream(c, s, is);
Z3_CATCH;
}
void Z3_API Z3_solver_from_file(Z3_context c, Z3_solver s, Z3_string file_name) {
Z3_TRY;
LOG_Z3_solver_from_file(c, s, file_name);
char const* ext = get_extension(file_name);
std::ifstream is(file_name);
if (!is) {
SET_ERROR_CODE(Z3_FILE_ACCESS_ERROR);
}
else if (ext && std::string("dimacs") == ext) {
ast_manager& m = to_solver_ref(s)->get_manager();
sat::solver solver(to_solver_ref(s)->get_params(), m.limit(), nullptr);
parse_dimacs(is, solver);
sat2goal s2g;
model_converter_ref mc;
atom2bool_var a2b(m);
goal g(m);
s2g(solver, a2b, to_solver_ref(s)->get_params(), g, mc);
for (unsigned i = 0; i < g.size(); ++i) {
to_solver_ref(s)->assert_expr(g.form(i));
}
}
else {
solver_from_stream(c, s, is);
}
Z3_CATCH;
}
Z3_string Z3_API Z3_solver_get_help(Z3_context c, Z3_solver s) {
Z3_TRY;
LOG_Z3_solver_get_help(c, s);

39
src/api/c++/z3++.h
View file

@ -1536,6 +1536,35 @@ namespace z3 {
m_vector = s.m_vector;
return *this;
}
bool contains(T const& x) const {
for (auto y : *this) if (eq(x, y)) return true;
return false;
}
class iterator {
ast_vector_tpl const* m_vector;
unsigned m_index;
public:
iterator(ast_vector_tpl const* v, unsigned i): m_vector(v), m_index(i) {}
iterator(iterator& other): m_vector(other.m_vector), m_index(other.m_index) {}
iterator operator=(iterator const& other) { m_vector = other.m_vector; m_index = other.m_index; return *this; }
bool operator==(iterator const& other) {
return other.m_index == m_index;
};
bool operator!=(iterator const& other) {
return other.m_index != m_index;
};
iterator& operator++() {
++m_index;
return *this;
}
iterator operator++(int) { iterator tmp = *this; ++m_index; return tmp; }
T * operator->() const { return &(operator*()); }
T operator*() const { return (*m_vector)[m_index]; }
};
iterator begin() const { return iterator(this, 0); }
iterator end() const { return iterator(this, size()); }
friend std::ostream & operator<<(std::ostream & out, ast_vector_tpl const & v) { out << Z3_ast_vector_to_string(v.ctx(), v); return out; }
};
@ -1911,6 +1940,11 @@ namespace z3 {
return *this;
}
void set(params const & p) { Z3_solver_set_params(ctx(), m_solver, p); check_error(); }
void set(char const * k, bool v) { params p(ctx()); p.set(k, v); set(p); }
void set(char const * k, unsigned v) { params p(ctx()); p.set(k, v); set(p); }
void set(char const * k, double v) { params p(ctx()); p.set(k, v); set(p); }
void set(char const * k, symbol const & v) { params p(ctx()); p.set(k, v); set(p); }
void set(char const * k, char const* v) { params p(ctx()); p.set(k, v); set(p); }
void push() { Z3_solver_push(ctx(), m_solver); check_error(); }
void pop(unsigned n = 1) { Z3_solver_pop(ctx(), m_solver, n); check_error(); }
void reset() { Z3_solver_reset(ctx(), m_solver); check_error(); }
@ -1923,6 +1957,10 @@ namespace z3 {
void add(expr const & e, char const * p) {
add(e, ctx().bool_const(p));
}
void add(expr_vector const& v) { check_context(*this, v); for (expr e : v) add(e); }
void from_file(char const* file) { Z3_solver_from_file(ctx(), m_solver, file); ctx().check_parser_error(); }
void from_string(char const* s) { Z3_solver_from_string(ctx(), m_solver, s); ctx().check_parser_error(); }
check_result check() { Z3_lbool r = Z3_solver_check(ctx(), m_solver); check_error(); return to_check_result(r); }
check_result check(unsigned n, expr * const assumptions) {
array<Z3_ast> _assumptions(n);
@ -2003,6 +2041,7 @@ namespace z3 {
return *this;
}
void add(expr const & f) { check_context(*this, f); Z3_goal_assert(ctx(), m_goal, f); check_error(); }
void add(expr_vector const& v) { check_context(*this, v); for (expr e : v) add(e); }
unsigned size() const { return Z3_goal_size(ctx(), m_goal); }
expr operator[](int i) const { assert(0 <= i); Z3_ast r = Z3_goal_formula(ctx(), m_goal, i); check_error(); return expr(ctx(), r); }
Z3_goal_prec precision() const { return Z3_goal_precision(ctx(), m_goal); }

34
src/api/dotnet/Params.cs
View file

@ -31,98 +31,108 @@ namespace Microsoft.Z3
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(Symbol name, bool value)
public Params Add(Symbol name, bool value)
{
Contract.Requires(name != null);
Native.Z3_params_set_bool(Context.nCtx, NativeObject, name.NativeObject, (value) ? 1 : 0);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(Symbol name, uint value)
public Params Add(Symbol name, uint value)
{
Contract.Requires(name != null);
Native.Z3_params_set_uint(Context.nCtx, NativeObject, name.NativeObject, value);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(Symbol name, double value)
public Params Add(Symbol name, double value)
{
Contract.Requires(name != null);
Contract.Requires(name != null);
Native.Z3_params_set_double(Context.nCtx, NativeObject, name.NativeObject, value);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(Symbol name, string value)
public Params Add(Symbol name, string value)
{
Contract.Requires(value != null);
Native.Z3_params_set_symbol(Context.nCtx, NativeObject, name.NativeObject, Context.MkSymbol(value).NativeObject);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(Symbol name, Symbol value)
public Params Add(Symbol name, Symbol value)
{
Contract.Requires(name != null);
Contract.Requires(value != null);
Native.Z3_params_set_symbol(Context.nCtx, NativeObject, name.NativeObject, value.NativeObject);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(string name, bool value)
public Params Add(string name, bool value)
{
Native.Z3_params_set_bool(Context.nCtx, NativeObject, Context.MkSymbol(name).NativeObject, (value) ? 1 : 0);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(string name, uint value)
public Params Add(string name, uint value)
{
Native.Z3_params_set_uint(Context.nCtx, NativeObject, Context.MkSymbol(name).NativeObject, value);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(string name, double value)
public Params Add(string name, double value)
{
Native.Z3_params_set_double(Context.nCtx, NativeObject, Context.MkSymbol(name).NativeObject, value);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(string name, Symbol value)
public Params Add(string name, Symbol value)
{
Contract.Requires(value != null);
Native.Z3_params_set_symbol(Context.nCtx, NativeObject, Context.MkSymbol(name).NativeObject, value.NativeObject);
return this;
}
/// <summary>
/// Adds a parameter setting.
/// </summary>
public void Add(string name, string value)
public Params Add(string name, string value)
{
Contract.Requires(name != null);
Contract.Requires(value != null);
Native.Z3_params_set_symbol(Context.nCtx, NativeObject, Context.MkSymbol(name).NativeObject, Context.MkSymbol(value).NativeObject);
return this;
}
/// <summary>

86
src/api/dotnet/Solver.cs
View file

@ -57,6 +57,49 @@ namespace Microsoft.Z3
}
}
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(string name, bool value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(string name, uint value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(string name, double value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(string name, string value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(string name, Symbol value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(Symbol name, bool value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(Symbol name, uint value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(Symbol name, double value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(Symbol name, string value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Sets parameter on the solver
/// </summary>
public void Set(Symbol name, Symbol value) { Parameters = Context.MkParams().Add(name, value); }
/// <summary>
/// Retrieves parameter descriptions for solver.
/// </summary>
@ -140,11 +183,11 @@ namespace Microsoft.Z3
/// using the Boolean constants in ps.
/// </summary>
/// <remarks>
/// This API is an alternative to <see cref="Check"/> with assumptions for extracting unsat cores.
/// This API is an alternative to <see cref="Check(Expr[])"/> with assumptions for extracting unsat cores.
/// Both APIs can be used in the same solver. The unsat core will contain a combination
/// of the Boolean variables provided using <see cref="AssertAndTrack(BoolExpr[],BoolExpr[])"/>
/// and the Boolean literals
/// provided using <see cref="Check"/> with assumptions.
/// provided using <see cref="Check(Expr[])"/> with assumptions.
/// </remarks>
public void AssertAndTrack(BoolExpr[] constraints, BoolExpr[] ps)
{
@ -165,11 +208,11 @@ namespace Microsoft.Z3
/// using the Boolean constant p.
/// </summary>
/// <remarks>
/// This API is an alternative to <see cref="Check"/> with assumptions for extracting unsat cores.
/// This API is an alternative to <see cref="Check(Expr[])"/> with assumptions for extracting unsat cores.
/// Both APIs can be used in the same solver. The unsat core will contain a combination
/// of the Boolean variables provided using <see cref="AssertAndTrack(BoolExpr[],BoolExpr[])"/>
/// and the Boolean literals
/// provided using <see cref="Check"/> with assumptions.
/// provided using <see cref="Check(Expr[])"/> with assumptions.
/// </remarks>
public void AssertAndTrack(BoolExpr constraint, BoolExpr p)
{
@ -181,6 +224,22 @@ namespace Microsoft.Z3
Native.Z3_solver_assert_and_track(Context.nCtx, NativeObject, constraint.NativeObject, p.NativeObject);
}
/// <summary>
/// Load solver assertions from a file.
/// </summary>
public void FromFile(string file)
{
Native.Z3_solver_from_file(Context.nCtx, NativeObject, file);
}
/// <summary>
/// Load solver assertions from a string.
/// </summary>
public void FromString(string str)
{
Native.Z3_solver_from_string(Context.nCtx, NativeObject, str);
}
/// <summary>
/// The number of assertions in the solver.
/// </summary>
@ -225,6 +284,25 @@ namespace Microsoft.Z3
return lboolToStatus(r);
}
/// <summary>
/// Checks whether the assertions in the solver are consistent or not.
/// </summary>
/// <remarks>
/// <seealso cref="Model"/>
/// <seealso cref="UnsatCore"/>
/// <seealso cref="Proof"/>
/// </remarks>
public Status Check(IEnumerable<BoolExpr> assumptions)
{
Z3_lbool r;
BoolExpr[] asms = assumptions.ToArray();
if (asms.Length == 0)
r = (Z3_lbool)Native.Z3_solver_check(Context.nCtx, NativeObject);
else
r = (Z3_lbool)Native.Z3_solver_check_assumptions(Context.nCtx, NativeObject, (uint)asms.Length, AST.ArrayToNative(asms));
return lboolToStatus(r);
}
/// <summary>
/// Retrieve fixed assignments to the set of variables in the form of consequences.
/// Each consequence is an implication of the form

18
src/api/java/Solver.java
View file

@ -1,3 +1,4 @@
/**
Copyright (c) 2012-2014 Microsoft Corporation
@ -120,6 +121,23 @@ public class Solver extends Z3Object {
}
}
/**
* Load solver assertions from a file.
*/
public void fromFile(String file)
{
Native.solverFromFile(getContext().nCtx(), getNativeObject(), file);
}
/**
* Load solver assertions from a string.
*/
public void fromString(String str)
{
Native.solverFromString(getContext().nCtx(), getNativeObject(), str);
}
/**
* Assert multiple constraints into the solver, and track them (in the
* unsat) core

14
src/api/python/z3/z3.py
View file

@ -6324,6 +6324,20 @@ class Solver(Z3PPObject):
sz = len(consequences)
consequences = [ consequences[i] for i in range(sz) ]
return CheckSatResult(r), consequences
def from_file(self, filename):
"""Parse assertions from a file"""
try:
Z3_solver_from_file(self.ctx.ref(), self.solver, filename)
except Z3Exception as e:
_handle_parse_error(e, self.ctx)
def from_string(self, s):
"""Parse assertions from a string"""
try:
Z3_solver_from_string(self.ctx.ref(), self.solver, s)
except Z3Exception as e:
_handle_parse_error(e, self.ctx)
def proof(self):
"""Return a proof for the last `check()`. Proof construction must be enabled."""

14
src/api/z3_api.h
View file

@ -6038,6 +6038,20 @@ extern "C" {
*/
Z3_ast_vector Z3_API Z3_solver_get_assertions(Z3_context c, Z3_solver s);
/**
\brief load solver assertions from a file.
def_API('Z3_solver_from_file', VOID, (_in(CONTEXT), _in(SOLVER), _in(STRING)))
*/
void Z3_API Z3_solver_from_file(Z3_context c, Z3_solver s, Z3_string file_name);
/**
\brief load solver assertions from a string.
def_API('Z3_solver_from_string', VOID, (_in(CONTEXT), _in(SOLVER), _in(STRING)))
*/
void Z3_API Z3_solver_from_string(Z3_context c, Z3_solver s, Z3_string file_name);
/**
\brief Check whether the assertions in a given solver are consistent or not.

1
src/opt/CMakeLists.txt
View file

@ -6,6 +6,7 @@ z3_add_component(opt
opt_cmds.cpp
opt_context.cpp
opt_pareto.cpp
opt_parse.cpp
optsmt.cpp
opt_solver.cpp
pb_sls.cpp

14
src/shell/main.cpp
View file

@ -35,6 +35,7 @@ Revision History:
#include "util/error_codes.h"
#include "util/gparams.h"
#include "util/env_params.h"
#include "util/file_path.h"
#include "shell/lp_frontend.h"
typedef enum { IN_UNSPECIFIED, IN_SMTLIB_2, IN_DATALOG, IN_DIMACS, IN_WCNF, IN_OPB, IN_Z3_LOG, IN_MPS } input_kind;
@ -286,19 +287,6 @@ void parse_cmd_line_args(int argc, char ** argv) {
}
}
char const * get_extension(char const * file_name) {
if (file_name == 0)
return 0;
char const * last_dot = 0;
for (;;) {
char const * tmp = strchr(file_name, '.');
if (tmp == 0) {
return last_dot;
}
last_dot = tmp + 1;
file_name = last_dot;
}
}
int STD_CALL main(int argc, char ** argv) {
try{

264
src/shell/opt_frontend.cpp
View file

@ -13,6 +13,7 @@ Copyright (c) 2015 Microsoft Corporation
#include "util/gparams.h"
#include "util/timeout.h"
#include "ast/reg_decl_plugins.h"
#include "opt/opt_parse.h"
extern bool g_display_statistics;
static bool g_first_interrupt = true;
@ -20,262 +21,6 @@ static opt::context* g_opt = 0;
static double g_start_time = 0;
static unsigned_vector g_handles;
class opt_stream_buffer {
std::istream & m_stream;
int m_val;
unsigned m_line;
public:
opt_stream_buffer(std::istream & s):
m_stream(s),
m_line(0) {
m_val = m_stream.get();
}
int operator *() const { return m_val;}
void operator ++() { m_val = m_stream.get(); }
int ch() const { return m_val; }
void next() { m_val = m_stream.get(); }
bool eof() const { return ch() == EOF; }
unsigned line() const { return m_line; }
void skip_whitespace() {
while ((ch() >= 9 && ch() <= 13) || ch() == 32) {
if (ch() == 10) ++m_line;
next();
}
}
void skip_space() {
while (ch() != 10 && ((ch() >= 9 && ch() <= 13) || ch() == 32)) {
next();
}
}
void skip_line() {
while(true) {
if (eof()) {
return;
}
if (ch() == '\n') {
++m_line;
next();
return;
}
next();
}
}
bool parse_token(char const* token) {
skip_whitespace();
char const* t = token;
while (ch() == *t) {
next();
++t;
}
return 0 == *t;
}
int parse_int() {
int val = 0;
bool neg = false;
skip_whitespace();
if (ch() == '-') {
neg = true;
next();
}
else if (ch() == '+') {
next();
}
if (ch() < '0' || ch() > '9') {
std::cerr << "(error line " << line() << " \"unexpected char: " << ((char)ch()) << "\" )\n";
exit(3);
}
while (ch() >= '0' && ch() <= '9') {
val = val*10 + (ch() - '0');
next();
}
return neg ? -val : val;
}
unsigned parse_unsigned() {
skip_space();
if (ch() == '\n') {
return UINT_MAX;
}
unsigned val = 0;
while (ch() >= '0' && ch() <= '9') {
val = val*10 + (ch() - '0');
next();
}
return val;
}
};
class wcnf {
opt::context& opt;
ast_manager& m;
opt_stream_buffer& in;
app_ref read_clause(unsigned& weight) {
int parsed_lit;
int var;
weight = in.parse_unsigned();
app_ref result(m), p(m);
expr_ref_vector ors(m);
while (true) {
parsed_lit = in.parse_int();
if (parsed_lit == 0)
break;
var = abs(parsed_lit);
p = m.mk_const(symbol(var), m.mk_bool_sort());
if (parsed_lit < 0) p = m.mk_not(p);
ors.push_back(p);
}
result = to_app(mk_or(m, ors.size(), ors.c_ptr()));
return result;
}
void parse_spec(unsigned& num_vars, unsigned& num_clauses, unsigned& max_weight) {
in.parse_token("wcnf");
num_vars = in.parse_unsigned();
num_clauses = in.parse_unsigned();
max_weight = in.parse_unsigned();
}
public:
wcnf(opt::context& opt, opt_stream_buffer& in): opt(opt), m(opt.get_manager()), in(in) {
opt.set_clausal(true);
}
void parse() {
unsigned num_vars = 0, num_clauses = 0, max_weight = 0;
while (true) {
in.skip_whitespace();
if (in.eof()) {
break;
}
else if (*in == 'c') {
in.skip_line();
}
else if (*in == 'p') {
++in;
parse_spec(num_vars, num_clauses, max_weight);
}
else {
unsigned weight = 0;
app_ref cls = read_clause(weight);
if (weight >= max_weight) {
opt.add_hard_constraint(cls);
}
else {
unsigned id = opt.add_soft_constraint(cls, rational(weight), symbol::null);
if (g_handles.empty()) {
g_handles.push_back(id);
}
}
}
}
}
};
class opb {
opt::context& opt;
ast_manager& m;
opt_stream_buffer& in;
arith_util arith;
app_ref parse_id() {
bool negated = in.parse_token("~");
if (!in.parse_token("x")) {
std::cerr << "(error line " << in.line() << " \"unexpected char: " << ((char)in.ch()) << "\")\n";
exit(3);
}
app_ref p(m);
int id = in.parse_int();
p = m.mk_const(symbol(id), m.mk_bool_sort());
if (negated) p = m.mk_not(p);
in.skip_whitespace();
return p;
}
app_ref parse_ids() {
app_ref result = parse_id();
while (*in == '~' || *in == 'x') {
result = m.mk_and(result, parse_id());
}
return result;
}
rational parse_coeff_r() {
in.skip_whitespace();
svector<char> num;
bool pos = true;
if (*in == '-') pos = false, ++in;
if (*in == '+') ++in;
if (!pos) num.push_back('-');
in.skip_whitespace();
while ('0' <= *in && *in <='9') num.push_back(*in), ++in;
num.push_back(0);
return rational(num.c_ptr());
}
app_ref parse_coeff() {
return app_ref(arith.mk_numeral(parse_coeff_r(), true), m);
}
app_ref parse_term() {
app_ref c = parse_coeff();
app_ref e = parse_ids();
return app_ref(m.mk_ite(e, c, arith.mk_numeral(rational(0), true)), m);
}
void parse_objective() {
app_ref t = parse_term();
while (!in.parse_token(";") && !in.eof()) {
t = arith.mk_add(t, parse_term());
}
g_handles.push_back(opt.add_objective(t, false));
}
void parse_constraint() {
app_ref t = parse_term();
while (!in.eof()) {
if (in.parse_token(">=")) {
t = arith.mk_ge(t, parse_coeff());
in.parse_token(";");
break;
}
if (in.parse_token("=")) {
t = m.mk_eq(t, parse_coeff());
in.parse_token(";");
break;
}
t = arith.mk_add(t, parse_term());
}
opt.add_hard_constraint(t);
}
public:
opb(opt::context& opt, opt_stream_buffer& in):
opt(opt), m(opt.get_manager()),
in(in), arith(m) {}
void parse() {
while (true) {
in.skip_whitespace();
if (in.eof()) {
break;
}
else if (*in == '*') {
in.skip_line();
}
else if (in.parse_token("min:")) {
parse_objective();
}
else {
parse_constraint();
}
}
}
};
static void display_results() {
@ -335,14 +80,11 @@ static unsigned parse_opt(std::istream& in, bool is_wcnf) {
g_opt = &opt;
params_ref p = gparams::get_module("opt");
opt.updt_params(p);
opt_stream_buffer _in(in);
if (is_wcnf) {
wcnf wcnf(opt, _in);
wcnf.parse();
parse_wcnf(opt, in, g_handles);
}
else {
opb opb(opt, _in);
opb.parse();
parse_opb(opt, in, g_handles);
}
try {
lbool r = opt.optimize();

38
src/util/file_path.h Normal file
View file

@ -0,0 +1,38 @@
/*++
Copyright (c) 2017 Microsoft Corporation
Module Name:
file_path.h
Abstract:
File path functions.
Author:
Nikolaj Bjorner (nbjorner) 2017-11-19
Revision History:
--*/
#ifndef FILE_PATH_H_
#define FILE_PATH_H_
inline char const * get_extension(char const * file_name) {
if (file_name == 0)
return 0;
char const * last_dot = 0;
for (;;) {
char const * tmp = strchr(file_name, '.');
if (tmp == 0) {
return last_dot;
}
last_dot = tmp + 1;
file_name = last_dot;
}
}
#endif /* FILE_PATH_H_ */