mirror of
https://github.com/Z3Prover/z3
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562 lines
18 KiB
C++
562 lines
18 KiB
C++
/*++
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Copyright (c) 2012 Microsoft Corporation
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Module Name:
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api_datalog.cpp
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Abstract:
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Datalog API
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Author:
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Leonardo de Moura (leonardo) 2012-02-29.
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Revision History:
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--*/
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#include"api_datalog.h"
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#include"api_context.h"
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#include"api_util.h"
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#include"dl_context.h"
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#include"ast_pp.h"
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#include"api_ast_vector.h"
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#include"api_log_macros.h"
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#include"api_stats.h"
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#include"datalog_parser.h"
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#include"cancel_eh.h"
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#include"scoped_timer.h"
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namespace api {
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fixedpoint_context::fixedpoint_context(ast_manager& m, front_end_params& p) :
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m_state(0),
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m_reduce_app(0),
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m_reduce_assign(0),
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m_context(m, p),
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m_trail(m) {}
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void fixedpoint_context::set_state(void* state) {
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SASSERT(!m_state);
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m_state = state;
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symbol name("datalog_relation");
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ast_manager& m = m_context.get_manager();
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if (!m.has_plugin(name)) {
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m.register_plugin(name, alloc(datalog::dl_decl_plugin));
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}
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datalog::relation_manager& r = m_context.get_rmanager();
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r.register_plugin(alloc(datalog::external_relation_plugin, *this, r));
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}
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void fixedpoint_context::reduce(func_decl* f, unsigned num_args, expr * const* args, expr_ref& result) {
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expr* r = 0;
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if (m_reduce_app) {
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m_reduce_app(m_state, f, num_args, args, &r);
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result = r;
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m_trail.push_back(f);
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for (unsigned i = 0; i < num_args; ++i) {
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m_trail.push_back(args[i]);
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}
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m_trail.push_back(r);
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}
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// allow fallthrough.
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if (r == 0) {
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ast_manager& m = m_context.get_manager();
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result = m.mk_app(f, num_args, args);
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}
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}
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// overwrite terms passed in outs vector with values computed by function.
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void fixedpoint_context::reduce_assign(func_decl* f, unsigned num_args, expr * const* args, unsigned num_out, expr* const* outs) {
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if (m_reduce_assign) {
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m_trail.push_back(f);
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for (unsigned i = 0; i < num_args; ++i) {
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m_trail.push_back(args[i]);
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}
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m_reduce_assign(m_state, f, num_args, args, num_out, outs);
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}
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}
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void fixedpoint_context::add_rule(expr* rule, symbol const& name) {
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m_context.add_rule(rule, name);
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}
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void fixedpoint_context::update_rule(expr* rule, symbol const& name) {
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m_context.update_rule(rule, name);
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}
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void fixedpoint_context::add_table_fact(func_decl* r, unsigned num_args, unsigned args[]) {
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m_context.add_table_fact(r, num_args, args);
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}
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unsigned fixedpoint_context::get_num_levels(func_decl* pred) {
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return m_context.get_num_levels(pred);
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}
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expr_ref fixedpoint_context::get_cover_delta(int level, func_decl* pred) {
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return m_context.get_cover_delta(level, pred);
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}
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void fixedpoint_context::add_cover(int level, func_decl* pred, expr* predicate) {
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m_context.add_cover(level, pred, predicate);
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}
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std::string fixedpoint_context::get_last_status() {
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datalog::execution_result status = m_context.get_status();
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switch(status) {
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case datalog::INPUT_ERROR:
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return "input error";
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case datalog::OK:
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return "ok";
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case datalog::TIMEOUT:
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return "timeout";
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default:
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UNREACHABLE();
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return "unknown";
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}
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}
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std::string fixedpoint_context::to_string(unsigned num_queries, expr*const* queries) {
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std::stringstream str;
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m_context.display_smt2(num_queries, queries, str);
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return str.str();
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}
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void fixedpoint_context::simplify_rules(
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unsigned num_rules, expr* const* rules,
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unsigned num_outputs, func_decl* const* outputs, expr_ref_vector& result) {
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ast_manager& m = m_context.get_manager();
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datalog::context ctx(m, m_context.get_fparams());
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datalog::rule_manager& rm = ctx.get_rule_manager();
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for (unsigned i = 0; i < num_rules; ++i) {
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expr* rule = rules[i], *body, *head;
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while (true) {
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if (is_quantifier(rule)) {
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rule = to_quantifier(rule)->get_expr();
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}
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else if (m.is_implies(rule, body, head)) {
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rule = head;
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}
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else {
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break;
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}
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}
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if (is_app(rule)) {
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func_decl* r = to_app(rule)->get_decl();
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if (!ctx.is_predicate(r)) {
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ctx.register_predicate(r);
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if (num_outputs == 0) {
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ctx.set_output_predicate(r);
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}
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}
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}
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}
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for (unsigned i = 0; i < num_outputs; ++i) {
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ctx.set_output_predicate(outputs[i]);
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}
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for (unsigned i = 0; i < num_rules; ++i) {
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expr* rule = rules[i];
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ctx.add_rule(rule, symbol::null);
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}
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model_converter_ref mc; // not exposed.
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proof_converter_ref pc; // not exposed.
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ctx.apply_default_transformation(mc, pc);
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datalog::rule_set const& new_rules = ctx.get_rules();
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datalog::rule_set::iterator it = new_rules.begin(), end = new_rules.end();
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for (; it != end; ++it) {
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datalog::rule* r = *it;
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expr_ref fml(m);
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r->to_formula(fml);
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result.push_back(fml);
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}
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}
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};
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extern "C" {
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////////////////////////////////////
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// Datalog utilities
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//
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unsigned Z3_API Z3_get_relation_arity(Z3_context c, Z3_sort s) {
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Z3_TRY;
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LOG_Z3_get_relation_arity(c, s);
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RESET_ERROR_CODE();
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sort * r = to_sort(s);
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if (Z3_get_sort_kind(c, s) != Z3_RELATION_SORT) {
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SET_ERROR_CODE(Z3_INVALID_ARG);
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return 0;
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}
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return r->get_num_parameters();
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Z3_CATCH_RETURN(0);
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}
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Z3_sort Z3_API Z3_get_relation_column(Z3_context c, Z3_sort s, unsigned col) {
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Z3_TRY;
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LOG_Z3_get_relation_column(c, s, col);
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RESET_ERROR_CODE();
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sort * r = to_sort(s);
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if (Z3_get_sort_kind(c, s) != Z3_RELATION_SORT) {
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SET_ERROR_CODE(Z3_INVALID_ARG);
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RETURN_Z3(0);
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}
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if (col >= r->get_num_parameters()) {
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SET_ERROR_CODE(Z3_IOB);
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RETURN_Z3(0);
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}
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parameter const& p = r->get_parameter(col);
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if (!p.is_ast() || !is_sort(p.get_ast())) {
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UNREACHABLE();
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warning_msg("Sort parameter expected at %d", col);
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SET_ERROR_CODE(Z3_INTERNAL_FATAL);
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RETURN_Z3(0);
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}
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Z3_sort res = of_sort(to_sort(p.get_ast()));
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RETURN_Z3(res);
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Z3_CATCH_RETURN(0);
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}
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Z3_sort Z3_API Z3_mk_finite_domain_sort(Z3_context c, Z3_symbol name, unsigned __int64 size) {
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Z3_TRY;
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LOG_Z3_mk_finite_domain_sort(c, name, size);
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RESET_ERROR_CODE();
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sort* s = mk_c(c)->datalog_util().mk_sort(to_symbol(name), size);
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mk_c(c)->save_ast_trail(s);
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RETURN_Z3(of_sort(s));
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Z3_CATCH_RETURN(0);
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}
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Z3_bool Z3_API Z3_get_finite_domain_sort_size(Z3_context c, Z3_sort s, unsigned __int64 * out) {
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Z3_TRY;
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if (out) {
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*out = 0;
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}
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if (Z3_get_sort_kind(c, s) != Z3_FINITE_DOMAIN_SORT) {
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return Z3_FALSE;
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}
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if (!out) {
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return Z3_FALSE;
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}
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// must start loggging here, since function uses Z3_get_sort_kind above
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LOG_Z3_get_finite_domain_sort_size(c, s, out);
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RESET_ERROR_CODE();
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VERIFY(mk_c(c)->datalog_util().try_get_size(to_sort(s), *out));
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return Z3_TRUE;
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Z3_CATCH_RETURN(Z3_FALSE);
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}
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Z3_fixedpoint Z3_API Z3_mk_fixedpoint(Z3_context c) {
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Z3_TRY;
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LOG_Z3_mk_fixedpoint(c);
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RESET_ERROR_CODE();
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Z3_fixedpoint_ref * d = alloc(Z3_fixedpoint_ref);
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d->m_datalog = alloc(api::fixedpoint_context, mk_c(c)->m(), mk_c(c)->fparams());
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mk_c(c)->save_object(d);
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Z3_fixedpoint r = of_datalog(d);
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RETURN_Z3(r);
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Z3_CATCH_RETURN(0);
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}
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void Z3_API Z3_fixedpoint_inc_ref(Z3_context c, Z3_fixedpoint s) {
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Z3_TRY;
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LOG_Z3_fixedpoint_inc_ref(c, s);
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RESET_ERROR_CODE();
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to_fixedpoint(s)->inc_ref();
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_dec_ref(Z3_context c, Z3_fixedpoint s) {
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Z3_TRY;
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LOG_Z3_fixedpoint_dec_ref(c, s);
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RESET_ERROR_CODE();
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to_fixedpoint(s)->dec_ref();
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_assert(Z3_context c, Z3_fixedpoint d, Z3_ast a) {
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Z3_TRY;
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LOG_Z3_fixedpoint_assert(c, d, a);
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RESET_ERROR_CODE();
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CHECK_FORMULA(a,);
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to_fixedpoint_ref(d)->ctx().assert_expr(to_expr(a));
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_add_rule(Z3_context c, Z3_fixedpoint d, Z3_ast a, Z3_symbol name) {
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Z3_TRY;
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LOG_Z3_fixedpoint_add_rule(c, d, a, name);
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RESET_ERROR_CODE();
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CHECK_FORMULA(a,);
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to_fixedpoint_ref(d)->add_rule(to_expr(a), to_symbol(name));
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_add_fact(Z3_context c, Z3_fixedpoint d,
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Z3_func_decl r, unsigned num_args, unsigned args[]) {
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Z3_TRY;
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LOG_Z3_fixedpoint_add_fact(c, d, r, num_args, args);
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RESET_ERROR_CODE();
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to_fixedpoint_ref(d)->add_table_fact(to_func_decl(r), num_args, args);
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Z3_CATCH;
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}
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Z3_lbool Z3_API Z3_fixedpoint_query(Z3_context c,Z3_fixedpoint d, Z3_ast q) {
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Z3_TRY;
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LOG_Z3_fixedpoint_query(c, d, q);
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RESET_ERROR_CODE();
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lbool r = l_undef;
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cancel_eh<api::fixedpoint_context> eh(*to_fixedpoint_ref(d));
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unsigned timeout = to_fixedpoint(d)->m_params.get_uint(":timeout", UINT_MAX);
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api::context::set_interruptable(*(mk_c(c)), eh);
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{
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scoped_timer timer(timeout, &eh);
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try {
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r = to_fixedpoint_ref(d)->ctx().query(to_expr(q));
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}
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catch (z3_exception& ex) {
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mk_c(c)->handle_exception(ex);
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r = l_undef;
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}
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to_fixedpoint_ref(d)->ctx().cleanup();
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}
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return of_lbool(r);
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Z3_CATCH_RETURN(Z3_L_UNDEF);
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}
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Z3_lbool Z3_API Z3_fixedpoint_query_relations(
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__in Z3_context c,__in Z3_fixedpoint d,
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__in unsigned num_relations, Z3_func_decl const relations[]) {
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Z3_TRY;
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LOG_Z3_fixedpoint_query_relations(c, d, num_relations, relations);
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RESET_ERROR_CODE();
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lbool r = l_undef;
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unsigned timeout = to_fixedpoint(d)->m_params.get_uint(":timeout", UINT_MAX);
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cancel_eh<api::fixedpoint_context> eh(*to_fixedpoint_ref(d));
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api::context::set_interruptable(*(mk_c(c)), eh);
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{
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scoped_timer timer(timeout, &eh);
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try {
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r = to_fixedpoint_ref(d)->ctx().dl_query(num_relations, to_func_decls(relations));
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}
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catch (z3_exception& ex) {
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mk_c(c)->handle_exception(ex);
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r = l_undef;
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}
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to_fixedpoint_ref(d)->ctx().cleanup();
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}
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return of_lbool(r);
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Z3_CATCH_RETURN(Z3_L_UNDEF);
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}
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Z3_ast Z3_API Z3_fixedpoint_get_answer(Z3_context c, Z3_fixedpoint d) {
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Z3_TRY;
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LOG_Z3_fixedpoint_get_answer(c, d);
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RESET_ERROR_CODE();
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expr* e = to_fixedpoint_ref(d)->ctx().get_answer_as_formula();
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mk_c(c)->save_ast_trail(e);
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RETURN_Z3(of_expr(e));
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Z3_CATCH_RETURN(0);
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}
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Z3_string Z3_API Z3_fixedpoint_get_reason_unknown(Z3_context c,Z3_fixedpoint d) {
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Z3_TRY;
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LOG_Z3_fixedpoint_get_reason_unknown(c, d);
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RESET_ERROR_CODE();
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return mk_c(c)->mk_external_string(to_fixedpoint_ref(d)->get_last_status());
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Z3_CATCH_RETURN("");
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}
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Z3_string Z3_API Z3_fixedpoint_to_string(
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Z3_context c,
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Z3_fixedpoint d,
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unsigned num_queries,
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Z3_ast _queries[]) {
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Z3_TRY;
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expr*const* queries = to_exprs(_queries);
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LOG_Z3_fixedpoint_to_string(c, d, num_queries, _queries);
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RESET_ERROR_CODE();
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return mk_c(c)->mk_external_string(to_fixedpoint_ref(d)->to_string(num_queries, queries));
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Z3_CATCH_RETURN("");
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}
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Z3_stats Z3_API Z3_fixedpoint_get_statistics(Z3_context c,Z3_fixedpoint d) {
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Z3_TRY;
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LOG_Z3_fixedpoint_get_statistics(c, d);
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RESET_ERROR_CODE();
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Z3_stats_ref * st = alloc(Z3_stats_ref);
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to_fixedpoint_ref(d)->ctx().collect_statistics(st->m_stats);
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mk_c(c)->save_object(st);
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Z3_stats r = of_stats(st);
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RETURN_Z3(r);
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Z3_CATCH_RETURN(0);
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}
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void Z3_API Z3_fixedpoint_register_relation(Z3_context c,Z3_fixedpoint d, Z3_func_decl f) {
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Z3_TRY;
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LOG_Z3_fixedpoint_register_relation(c, d, f);
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to_fixedpoint_ref(d)->ctx().register_predicate(to_func_decl(f));
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_set_predicate_representation(
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Z3_context c,
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Z3_fixedpoint d,
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Z3_func_decl f,
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unsigned num_relations,
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Z3_symbol const relation_kinds[]) {
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Z3_TRY;
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LOG_Z3_fixedpoint_set_predicate_representation(c, d, f, num_relations, relation_kinds);
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svector<symbol> kinds;
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for (unsigned i = 0; i < num_relations; ++i) {
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kinds.push_back(to_symbol(relation_kinds[i]));
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}
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to_fixedpoint_ref(d)->ctx().set_predicate_representation(to_func_decl(f), num_relations, kinds.c_ptr());
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_set_reduce_assign_callback(
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Z3_context c, Z3_fixedpoint d, Z3_fixedpoint_reduce_assign_callback_fptr f) {
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Z3_TRY;
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// no logging
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to_fixedpoint_ref(d)->set_reduce_assign((reduce_assign_callback_fptr)f);
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Z3_CATCH;
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}
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void Z3_API Z3_fixedpoint_set_reduce_app_callback(
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Z3_context c, Z3_fixedpoint d, Z3_fixedpoint_reduce_app_callback_fptr f) {
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Z3_TRY;
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// no logging
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to_fixedpoint_ref(d)->set_reduce_app((reduce_app_callback_fptr)f);
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Z3_CATCH;
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}
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Z3_ast_vector Z3_API Z3_fixedpoint_simplify_rules(
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Z3_context c,
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Z3_fixedpoint d,
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unsigned num_rules,
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Z3_ast _rules[],
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unsigned num_outputs,
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Z3_func_decl _outputs[]) {
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Z3_TRY;
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LOG_Z3_fixedpoint_simplify_rules(c, d, num_rules, _rules, num_outputs, _outputs);
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RESET_ERROR_CODE();
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expr** rules = (expr**)_rules;
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func_decl** outputs = (func_decl**)_outputs;
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ast_manager& m = mk_c(c)->m();
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expr_ref_vector result(m);
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to_fixedpoint_ref(d)->simplify_rules(num_rules, rules, num_outputs, outputs, result);
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Z3_ast_vector_ref* v = alloc(Z3_ast_vector_ref, mk_c(c)->m());
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mk_c(c)->save_object(v);
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for (unsigned i = 0; i < result.size(); ++i) {
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v->m_ast_vector.push_back(result[i].get());
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}
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RETURN_Z3(of_ast_vector(v));
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Z3_CATCH_RETURN(0)
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}
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void Z3_API Z3_fixedpoint_init(Z3_context c,Z3_fixedpoint d, void* state) {
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|
Z3_TRY;
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|
// not logged
|
|
to_fixedpoint_ref(d)->set_state(state);
|
|
Z3_CATCH;
|
|
}
|
|
|
|
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void Z3_API Z3_fixedpoint_update_rule(Z3_context c, Z3_fixedpoint d, Z3_ast a, Z3_symbol name) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_update_rule(c, d, a, name);
|
|
RESET_ERROR_CODE();
|
|
CHECK_FORMULA(a,);
|
|
to_fixedpoint_ref(d)->update_rule(to_expr(a), to_symbol(name));
|
|
Z3_CATCH;
|
|
}
|
|
|
|
unsigned Z3_API Z3_fixedpoint_get_num_levels(Z3_context c, Z3_fixedpoint d, Z3_func_decl pred) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_get_num_levels(c, d, pred);
|
|
RESET_ERROR_CODE();
|
|
return to_fixedpoint_ref(d)->get_num_levels(to_func_decl(pred));
|
|
Z3_CATCH_RETURN(0)
|
|
}
|
|
|
|
Z3_ast Z3_API Z3_fixedpoint_get_cover_delta(Z3_context c, Z3_fixedpoint d, int level, Z3_func_decl pred) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_get_cover_delta(c, d, level, pred);
|
|
RESET_ERROR_CODE();
|
|
expr_ref r = to_fixedpoint_ref(d)->get_cover_delta(level, to_func_decl(pred));
|
|
mk_c(c)->save_ast_trail(r);
|
|
RETURN_Z3(of_expr(r.get()));
|
|
Z3_CATCH_RETURN(0);
|
|
}
|
|
|
|
void Z3_API Z3_fixedpoint_add_cover(Z3_context c, Z3_fixedpoint d, int level, Z3_func_decl pred, Z3_ast property) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_add_cover(c, d, level, pred, property);
|
|
RESET_ERROR_CODE();
|
|
to_fixedpoint_ref(d)->add_cover(level, to_func_decl(pred), to_expr(property));
|
|
Z3_CATCH;
|
|
}
|
|
|
|
Z3_string Z3_API Z3_fixedpoint_get_help(Z3_context c, Z3_fixedpoint d) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_get_help(c, d);
|
|
RESET_ERROR_CODE();
|
|
std::ostringstream buffer;
|
|
param_descrs descrs;
|
|
to_fixedpoint_ref(d)->collect_param_descrs(descrs);
|
|
descrs.display(buffer);
|
|
return mk_c(c)->mk_external_string(buffer.str());
|
|
Z3_CATCH_RETURN("");
|
|
}
|
|
|
|
Z3_param_descrs Z3_API Z3_fixedpoint_get_param_descrs(Z3_context c, Z3_fixedpoint f) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_get_param_descrs(c, f);
|
|
RESET_ERROR_CODE();
|
|
Z3_param_descrs_ref * d = alloc(Z3_param_descrs_ref);
|
|
mk_c(c)->save_object(d);
|
|
to_fixedpoint_ref(f)->collect_param_descrs(d->m_descrs);
|
|
Z3_param_descrs r = of_param_descrs(d);
|
|
RETURN_Z3(r);
|
|
Z3_CATCH_RETURN(0);
|
|
}
|
|
|
|
void Z3_API Z3_fixedpoint_set_params(Z3_context c, Z3_fixedpoint d, Z3_params p) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_set_params(c, d, p);
|
|
RESET_ERROR_CODE();
|
|
param_descrs descrs;
|
|
to_fixedpoint_ref(d)->collect_param_descrs(descrs);
|
|
to_params(p)->m_params.validate(descrs);
|
|
to_fixedpoint_ref(d)->updt_params(to_param_ref(p));
|
|
to_fixedpoint(d)->m_params = to_param_ref(p);
|
|
Z3_CATCH;
|
|
}
|
|
|
|
void Z3_API Z3_fixedpoint_push(Z3_context c,Z3_fixedpoint d) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_push(c, d);
|
|
RESET_ERROR_CODE();
|
|
to_fixedpoint_ref(d)->ctx().push();
|
|
Z3_CATCH;
|
|
}
|
|
|
|
void Z3_API Z3_fixedpoint_pop(Z3_context c,Z3_fixedpoint d) {
|
|
Z3_TRY;
|
|
LOG_Z3_fixedpoint_pop(c, d);
|
|
RESET_ERROR_CODE();
|
|
to_fixedpoint_ref(d)->ctx().pop();
|
|
Z3_CATCH;
|
|
|
|
}
|
|
|
|
|
|
};
|