mirror of
https://github.com/Z3Prover/z3
synced 2026-05-25 11:26:21 +00:00
1728 lines
66 KiB
C++
1728 lines
66 KiB
C++
#include <cctype>
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#include <cstdlib>
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#include <fstream>
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#include <iostream>
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#include <memory>
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#include <sstream>
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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#include <vector>
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#include "ast/arith_decl_plugin.h"
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#include "ast/array_decl_plugin.h"
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#include "ast/expr_abstract.h"
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#include "ast/ast_util.h"
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#include "cmd_context/cmd_context.h"
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#include "cmd_context/tptp_frontend.h"
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#include "solver/solver.h"
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#include "util/error_codes.h"
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#include "util/rational.h"
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#include "util/timeout.h"
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#include "util/z3_exception.h"
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bool g_display_statistics = false;
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bool g_display_model = false;
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static void on_timeout() {
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std::cout << "% SZS status Timeout\n";
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std::cout.flush();
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_Exit(0);
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}
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namespace {
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enum class token_kind {
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eof_tok,
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id,
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str,
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lparen,
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rparen,
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lbrack,
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rbrack,
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comma,
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dot,
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colon,
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and_tok,
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or_tok,
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not_tok,
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forall_tok,
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exists_tok,
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type_forall_tok, // !>
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type_exists_tok, // ?*
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equal_tok,
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neq_tok,
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iff_tok,
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implies_tok,
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implied_tok,
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xor_tok,
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nor_tok,
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nand_tok,
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gt_tok,
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star_tok,
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slash_tok,
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minus_tok,
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at_tok,
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lambda_tok
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};
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struct parse_error : public std::exception {
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std::string m_msg;
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parse_error(std::string const& msg): m_msg(msg) {}
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char const* what() const noexcept override { return m_msg.c_str(); }
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};
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class scoped_regular_stream {
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cmd_context& m_ctx;
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std::string m_prev;
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public:
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scoped_regular_stream(cmd_context& ctx, std::ostream& out): m_ctx(ctx), m_prev(ctx.get_regular_stream_name()) { m_ctx.set_regular_stream(out); }
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~scoped_regular_stream() { m_ctx.set_regular_stream(m_prev.c_str()); }
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};
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struct token {
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token_kind kind = token_kind::eof_tok;
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std::string text;
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unsigned line = 1;
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unsigned col = 1;
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};
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class lexer {
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std::string const& m_input;
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size_t m_pos = 0;
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unsigned m_line = 1;
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unsigned m_col = 1;
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bool eof() const { return m_pos >= m_input.size(); }
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char peek(unsigned k = 0) const { return m_pos + k < m_input.size() ? m_input[m_pos + k] : '\0'; }
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char get() {
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char c = peek();
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if (!eof()) {
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++m_pos;
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if (c == '\n') {
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++m_line;
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m_col = 1;
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}
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else {
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++m_col;
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}
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}
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return c;
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}
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static bool is_symbol_start(char c) {
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return std::isalnum(static_cast<unsigned char>(c)) || c == '$' || c == '_';
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}
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static bool is_id_char(char c) {
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return std::isalnum(static_cast<unsigned char>(c)) || c == '$' || c == '_' || c == '\'' || c == '-';
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}
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void skip_ws_comments() {
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while (!eof()) {
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if (std::isspace(static_cast<unsigned char>(peek()))) {
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get();
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continue;
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}
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if (peek() == '%') {
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while (!eof() && get() != '\n') {}
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continue;
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}
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if (peek() == '/' && peek(1) == '*') {
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get();
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get();
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while (!eof()) {
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if (peek() == '*' && peek(1) == '/') {
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get();
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get();
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break;
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}
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get();
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}
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continue;
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}
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break;
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}
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}
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public:
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lexer(std::string const& input): m_input(input) {}
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token next() {
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skip_ws_comments();
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token t;
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t.line = m_line;
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t.col = m_col;
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if (eof()) {
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t.kind = token_kind::eof_tok;
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return t;
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}
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if (peek() == '\'' || peek() == '"') {
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char q = get();
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t.kind = token_kind::str;
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while (!eof()) {
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char c = get();
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if (c == '\\' && !eof()) {
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t.text.push_back(c);
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t.text.push_back(get());
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continue;
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}
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if (c == q) return t;
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t.text.push_back(c);
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}
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throw parse_error("unterminated string literal");
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}
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if (peek() == '<' && peek(1) == '=' && peek(2) == '>') {
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get(); get(); get();
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t.kind = token_kind::iff_tok;
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t.text = "<=>";
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return t;
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}
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if (peek() == '<' && peek(1) == '~' && peek(2) == '>') {
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get(); get(); get();
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t.kind = token_kind::xor_tok;
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t.text = "<~>";
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return t;
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}
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if (peek() == '=' && peek(1) == '>') {
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get(); get();
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t.kind = token_kind::implies_tok;
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t.text = "=>";
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return t;
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}
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if (peek() == '<' && peek(1) == '=') {
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get(); get();
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t.kind = token_kind::implied_tok;
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t.text = "<=";
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return t;
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}
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if (peek() == '~' && peek(1) == '|') {
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get(); get();
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t.kind = token_kind::nor_tok;
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t.text = "~|";
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return t;
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}
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if (peek() == '~' && peek(1) == '&') {
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get(); get();
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t.kind = token_kind::nand_tok;
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t.text = "~&";
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return t;
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}
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if (peek() == '!' && peek(1) == '=') {
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get(); get();
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t.kind = token_kind::neq_tok;
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t.text = "!=";
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return t;
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}
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char c = get();
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switch (c) {
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case '(': t.kind = token_kind::lparen; return t;
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case ')': t.kind = token_kind::rparen; return t;
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case '[': t.kind = token_kind::lbrack; return t;
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case ']': t.kind = token_kind::rbrack; return t;
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case ',': t.kind = token_kind::comma; return t;
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case '.': t.kind = token_kind::dot; return t;
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case ':': t.kind = token_kind::colon; return t;
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case '&': t.kind = token_kind::and_tok; return t;
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case '|': t.kind = token_kind::or_tok; return t;
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case '~': t.kind = token_kind::not_tok; return t;
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case '!':
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if (peek() == '>') { get(); t.kind = token_kind::type_forall_tok; return t; }
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t.kind = token_kind::forall_tok; return t;
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case '?':
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if (peek() == '*') { get(); t.kind = token_kind::type_exists_tok; return t; }
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t.kind = token_kind::exists_tok; return t;
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case '=': t.kind = token_kind::equal_tok; return t;
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case '>': t.kind = token_kind::gt_tok; return t;
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case '*': t.kind = token_kind::star_tok; return t;
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case '/': t.kind = token_kind::slash_tok; return t;
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case '-': t.kind = token_kind::minus_tok; return t;
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case '@': t.kind = token_kind::at_tok; return t;
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case '^': t.kind = token_kind::lambda_tok; return t;
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default:
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break;
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}
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if (is_symbol_start(c)) {
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t.kind = token_kind::id;
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t.text.push_back(c);
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while (!eof() && is_id_char(peek()))
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t.text.push_back(get());
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return t;
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}
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std::ostringstream out;
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out << "unexpected character '" << c << "' at " << t.line << ":" << t.col;
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throw parse_error(out.str());
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}
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};
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struct parsed_type {
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std::vector<sort*> domain;
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sort* range = nullptr;
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parsed_type(sort* s): range(s) {}
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parsed_type(std::vector<sort*> const& d, sort* r): domain(d), range(r) {}
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};
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class tptp_parser {
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cmd_context& m_cmd;
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ast_manager& m;
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arith_util m_arith;
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array_util m_array;
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sort* m_univ;
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bool m_has_conjecture = false;
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bool m_last_name_quoted = false;
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std::unordered_map<std::string, sort*> m_sorts;
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sort_ref_vector m_pinned_sorts; // prevents cached sorts from being freed
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std::unordered_map<std::string, func_decl*> m_decls;
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func_decl_ref_vector m_pinned_decls; // prevents cached func_decls from being freed
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expr_ref_vector m_pinned_exprs; // prevents bound variable apps from being freed
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std::unordered_map<std::string, std::pair<std::vector<sort*>, sort*>> m_typed_decls;
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std::vector<std::unordered_map<std::string, app*>> m_bound;
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bool m_in_at_arg = false; // true when parsing inside @ argument (lambda body stops consuming @)
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struct implicit_var_scope {
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std::unordered_map<std::string, app*> vars;
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ptr_vector<app> order;
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};
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implicit_var_scope* m_implicit_scope = nullptr;
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std::unordered_set<std::string> m_seen_files;
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// Table-driven operator dispatch
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using op_builder = std::function<expr_ref(expr_ref_vector const&)>;
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struct op_entry {
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bool is_infix;
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unsigned precedence; // only meaningful for infix; higher = tighter binding
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bool right_assoc;
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op_builder builder;
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};
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std::unordered_map<std::string, op_entry> m_ops;
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// Infix precedence levels:
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static constexpr unsigned PREC_IFF = 1; // <=> <~>
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static constexpr unsigned PREC_IMPLIES = 2; // => <=
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static constexpr unsigned PREC_OR = 3; // | ~|
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static constexpr unsigned PREC_AND = 4; // & ~&
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static constexpr unsigned PREC_EQ = 5; // = !=
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std::string m_input;
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std::unique_ptr<lexer> m_lex;
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token m_curr;
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// Helper: check arity for arithmetic operators
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void check_arith_arity(expr_ref_vector const& args, unsigned expected, char const* name) {
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if (args.size() != expected) {
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std::ostringstream out;
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out << "'" << name << "' expects arity " << expected;
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throw parse_error(out.str());
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}
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}
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// Helper: coerce two arithmetic args to same sort (promote int to real if needed)
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std::pair<expr_ref, expr_ref> coerce_arith2(expr_ref_vector const& args) {
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expr_ref a(args[0], m), b(args[1], m);
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if (m_arith.is_real(a) || m_arith.is_real(b)) {
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if (m_arith.is_int(a)) a = expr_ref(m_arith.mk_to_real(a), m);
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if (m_arith.is_int(b)) b = expr_ref(m_arith.mk_to_real(b), m);
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}
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return { a, b };
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}
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// Helper: quotient dispatch (integer division for int/int, real division otherwise)
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expr_ref mk_quotient(expr_ref_vector const& args) {
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expr_ref a(args[0], m), b(args[1], m);
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if (m_arith.is_int(a) && m_arith.is_int(b))
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return expr_ref(m_arith.mk_idiv(a, b), m);
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if (m_arith.is_int(a)) a = expr_ref(m_arith.mk_to_real(a), m);
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if (m_arith.is_int(b)) b = expr_ref(m_arith.mk_to_real(b), m);
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return expr_ref(m_arith.mk_div(a, b), m);
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}
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// Map infix token to operator name (returns nullptr if not an infix op token)
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char const* token_to_op_name() const {
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switch (m_curr.kind) {
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case token_kind::iff_tok: return "<=>";
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case token_kind::xor_tok: return "<~>";
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case token_kind::implies_tok: return "=>";
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case token_kind::implied_tok: return "<=";
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case token_kind::or_tok: return "|";
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case token_kind::nor_tok: return "~|";
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case token_kind::and_tok: return "&";
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case token_kind::nand_tok: return "~&";
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case token_kind::equal_tok: return "=";
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case token_kind::neq_tok: return "!=";
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default: return nullptr;
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}
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}
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static std::string to_lower(std::string s) {
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for (char& c : s) c = static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
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return s;
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}
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static bool is_var_name(std::string const& s) {
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if (s.empty()) return false;
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unsigned char c = static_cast<unsigned char>(s[0]);
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return std::isupper(c) || s[0] == '_';
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}
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std::string loc() const {
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std::ostringstream out;
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out << m_curr.line << ":" << m_curr.col;
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return out.str();
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}
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void next() { m_curr = m_lex->next(); }
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bool is(token_kind k) const { return m_curr.kind == k; }
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bool accept(token_kind k) {
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if (is(k)) {
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next();
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return true;
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}
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return false;
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}
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void expect(token_kind k, char const* msg) {
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if (!accept(k)) {
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std::ostringstream out;
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out << "expected " << msg << " at " << loc();
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throw parse_error(out.str());
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}
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}
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std::string parse_name() {
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if (is(token_kind::id) || is(token_kind::str)) {
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m_last_name_quoted = is(token_kind::str);
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std::string r = m_curr.text;
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next();
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return r;
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}
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std::ostringstream out;
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out << "expected identifier at " << loc();
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throw parse_error(out.str());
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}
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sort* get_sort(std::string const& n) {
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if (n == "$i") return m_univ;
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if (n == "$o") return m.mk_bool_sort();
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if (n == "$int") return m_arith.mk_int();
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if (n == "$rat" || n == "$real") return m_arith.mk_real();
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auto it = m_sorts.find(n);
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if (it != m_sorts.end()) return it->second;
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sort* s = m.mk_uninterpreted_sort(symbol(n));
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m_sorts.emplace(n, s);
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m_pinned_sorts.push_back(s);
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return s;
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}
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// For higher-order types like ($i > $o), create an uninterpreted sort
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// Function type A > B is represented as Array(A, B).
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// Multi-argument A * B > C is represented as Array(A, Array(B, C)) (curried).
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sort* get_ho_sort(std::vector<sort*> const& domain, sort* range) {
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sort* s = range;
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for (int i = (int)domain.size() - 1; i >= 0; --i)
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s = m_array.mk_array_sort(domain[i], s);
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return s;
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}
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static bool is_ttype(sort* s) {
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return s->get_name() == symbol("$tType");
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}
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static bool is_nonempty_digit_string(std::string const& s) {
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if (s.empty()) return false;
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for (char c : s) {
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if (!std::isdigit(static_cast<unsigned char>(c)))
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return false;
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}
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return true;
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}
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expr_ref parse_numeral_from_name(std::string const& n) {
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SASSERT(is_nonempty_digit_string(n));
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rational num(n.c_str());
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if (accept(token_kind::dot)) {
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std::string frac = parse_name();
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if (!is_nonempty_digit_string(frac))
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throw parse_error("fractional part of decimal literal must be a sequence of digits");
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rational den(1);
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for (unsigned i = 0; i < frac.size(); ++i) {
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den *= rational(10);
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}
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rational frac_num(frac.c_str());
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return expr_ref(m_arith.mk_numeral(num + frac_num / den, false), m);
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}
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if (accept(token_kind::slash_tok)) {
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std::string d = parse_name();
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if (!is_nonempty_digit_string(d))
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throw parse_error("denominator of rational literal must be a sequence of digits");
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rational den(d.c_str());
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if (den.is_zero())
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throw parse_error("denominator of rational literal cannot be zero");
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return expr_ref(m_arith.mk_numeral(num / den, false), m);
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}
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return expr_ref(m_arith.mk_numeral(num, true), m);
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}
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static std::string mk_decl_key(std::string const& name, unsigned arity, char tag) {
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return std::to_string(name.size()) + ":" + name + "\x1f" + std::to_string(arity) + "\x1f" + tag;
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}
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static std::string mk_typed_key(std::string const& name, unsigned arity) {
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return mk_decl_key(name, arity, 't');
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}
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func_decl* mk_decl(std::string const& name, unsigned arity, bool pred) {
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auto itt = m_typed_decls.find(mk_typed_key(name, arity));
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if (itt != m_typed_decls.end()) {
|
|
std::string typed_decl_key = mk_decl_key(name, arity, 'd');
|
|
auto itd = m_decls.find(typed_decl_key);
|
|
if (itd != m_decls.end()) return itd->second;
|
|
auto const& sig = itt->second;
|
|
func_decl* f = m.mk_func_decl(symbol(name), sig.first.size(), sig.first.data(), sig.second);
|
|
m_pinned_decls.push_back(f);
|
|
m_decls.emplace(typed_decl_key, f);
|
|
return f;
|
|
}
|
|
|
|
std::string key = mk_decl_key(name, arity, pred ? 'p' : 'f');
|
|
auto itd = m_decls.find(key);
|
|
if (itd != m_decls.end()) return itd->second;
|
|
|
|
std::vector<sort*> dom(arity, m_univ);
|
|
func_decl* f = m.mk_func_decl(symbol(name), arity, dom.data(), pred ? m.mk_bool_sort() : m_univ);
|
|
m_pinned_decls.push_back(f);
|
|
m_decls.emplace(key, f);
|
|
return f;
|
|
}
|
|
|
|
// When a symbol is used with 0 args but has a typed decl with arity > 0,
|
|
// create a 0-arity constant with the function type sort (for THF function-as-value).
|
|
func_decl* mk_decl_or_ho_const(std::string const& name, unsigned arity, bool pred) {
|
|
if (arity == 0) {
|
|
// Check if there's a typed decl at any arity > 0 for this name
|
|
for (unsigned try_arity = 1; try_arity <= 30; ++try_arity) {
|
|
auto itt = m_typed_decls.find(mk_typed_key(name, try_arity));
|
|
if (itt != m_typed_decls.end()) {
|
|
auto const& sig = itt->second;
|
|
sort* ho = get_ho_sort(sig.first, sig.second);
|
|
std::string dkey = mk_decl_key(name, 0, 'h');
|
|
auto itd = m_decls.find(dkey);
|
|
if (itd != m_decls.end()) return itd->second;
|
|
func_decl* f = m.mk_func_decl(symbol(name), 0, static_cast<sort**>(nullptr), ho);
|
|
m_pinned_decls.push_back(f);
|
|
m_decls.emplace(dkey, f);
|
|
return f;
|
|
}
|
|
}
|
|
}
|
|
return mk_decl(name, arity, pred);
|
|
}
|
|
|
|
// Coerce an expression to a target sort using boxing/unboxing functions
|
|
expr_ref coerce_arg(expr_ref const& e, sort* target) {
|
|
sort* actual = e->get_sort();
|
|
if (actual == target) return e;
|
|
// Create a boxing function from actual sort to target sort
|
|
std::string box_name = std::string("$box_") + actual->get_name().str() + "_to_" + target->get_name().str();
|
|
std::string key = mk_decl_key(box_name, 1, 'f');
|
|
auto it = m_decls.find(key);
|
|
func_decl* f;
|
|
if (it != m_decls.end()) {
|
|
f = it->second;
|
|
} else {
|
|
f = m.mk_func_decl(symbol(box_name), 1, &actual, target);
|
|
m_pinned_decls.push_back(f);
|
|
m_decls.emplace(key, f);
|
|
}
|
|
return expr_ref(m.mk_app(f, e.get()), m);
|
|
}
|
|
|
|
// Coerce arguments of a function application to match declared sorts
|
|
void coerce_args(func_decl* f, expr_ref_vector& args) {
|
|
for (unsigned i = 0; i < args.size() && i < f->get_arity(); ++i) {
|
|
sort* expected = f->get_domain(i);
|
|
sort* actual = args.get(i)->get_sort();
|
|
if (expected != actual) {
|
|
args[i] = coerce_arg(expr_ref(args.get(i), m), expected);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Coerce result to expected sort if needed
|
|
expr_ref coerce_result(expr_ref const& e, sort* expected) {
|
|
if (!expected || e->get_sort() == expected) return e;
|
|
return coerce_arg(e, expected);
|
|
}
|
|
|
|
bool find_bound(std::string const& n, expr_ref& e) const {
|
|
for (auto it = m_bound.rbegin(); it != m_bound.rend(); ++it) {
|
|
auto jt = it->find(n);
|
|
if (jt != it->end()) {
|
|
e = jt->second;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool is_bound_var(app* a) const {
|
|
std::string name = a->get_decl()->get_name().str();
|
|
for (auto it = m_bound.rbegin(); it != m_bound.rend(); ++it) {
|
|
auto jt = it->find(name);
|
|
if (jt != it->end() && jt->second == a)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool should_create_implicit_var(std::string const& n) const {
|
|
return is_var_name(n) && m_implicit_scope;
|
|
}
|
|
|
|
app* get_or_create_implicit_var(std::string const& n) {
|
|
if (!m_implicit_scope)
|
|
throw parse_error("unexpected parser state: missing implicit variable scope");
|
|
auto it = m_implicit_scope->vars.find(n);
|
|
if (it != m_implicit_scope->vars.end()) return it->second;
|
|
app* c = m.mk_const(symbol(n), m_univ);
|
|
m_pinned_exprs.push_back(c);
|
|
m_implicit_scope->vars.emplace(n, c);
|
|
m_implicit_scope->order.push_back(c);
|
|
return c;
|
|
}
|
|
|
|
class scoped_implicit_vars {
|
|
tptp_parser& m_p;
|
|
implicit_var_scope* m_prev_scope;
|
|
public:
|
|
scoped_implicit_vars(tptp_parser& p, implicit_var_scope& scope):
|
|
m_p(p),
|
|
m_prev_scope(p.m_implicit_scope) {
|
|
m_p.m_implicit_scope = &scope;
|
|
}
|
|
scoped_implicit_vars(scoped_implicit_vars const&) = delete;
|
|
scoped_implicit_vars& operator=(scoped_implicit_vars const&) = delete;
|
|
scoped_implicit_vars(scoped_implicit_vars&&) = delete;
|
|
scoped_implicit_vars& operator=(scoped_implicit_vars&&) = delete;
|
|
~scoped_implicit_vars() {
|
|
m_p.m_implicit_scope = m_prev_scope;
|
|
}
|
|
};
|
|
|
|
expr_ref mk_quantifier(bool is_forall, ptr_vector<app> const& bound, expr_ref const& body) {
|
|
SASSERT(body);
|
|
if (bound.empty()) return body;
|
|
return is_forall ? ::mk_forall(m, bound.size(), bound.data(), body.get()) : ::mk_exists(m, bound.size(), bound.data(), body.get());
|
|
}
|
|
|
|
// $is_rat(x) ≡ exists a:Int, b:Int. b != 0 && x = a/b
|
|
expr_ref mk_is_rat(expr_ref const& x) {
|
|
sort* int_sort = m_arith.mk_int();
|
|
app* a = m.mk_fresh_const("a", int_sort);
|
|
app* b = m.mk_fresh_const("b", int_sort);
|
|
expr_ref ar(m_arith.mk_to_real(a), m);
|
|
expr_ref br(m_arith.mk_to_real(b), m);
|
|
expr_ref xr(x);
|
|
if (m_arith.is_int(x))
|
|
xr = expr_ref(m_arith.mk_to_real(x), m);
|
|
expr_ref b_ne_zero(m.mk_not(m.mk_eq(b, m_arith.mk_int(0))), m);
|
|
expr_ref x_eq_div(m.mk_eq(xr, m_arith.mk_div(ar, br)), m);
|
|
expr_ref body(m.mk_and(b_ne_zero, x_eq_div), m);
|
|
ptr_vector<app> bound;
|
|
bound.push_back(a);
|
|
bound.push_back(b);
|
|
return expr_ref(::mk_exists(m, bound.size(), bound.data(), body.get()), m);
|
|
}
|
|
|
|
parsed_type parse_type_atom() {
|
|
if (accept(token_kind::lparen)) {
|
|
std::vector<sort*> prod = parse_type_product_raw();
|
|
if (accept(token_kind::gt_tok)) {
|
|
// Full function type inside parens: (A * B > C) or (A > B > C)
|
|
parsed_type rhs = parse_type_expr();
|
|
std::vector<sort*> full_domain = prod;
|
|
if (!rhs.domain.empty()) {
|
|
// Nested higher-order: (A > B > C) → flatten
|
|
full_domain.insert(full_domain.end(), rhs.domain.begin(), rhs.domain.end());
|
|
}
|
|
expect(token_kind::rparen, "')'");
|
|
// Return with domain/range preserved for proper flattening
|
|
return parsed_type(full_domain, rhs.range);
|
|
}
|
|
expect(token_kind::rparen, "')'");
|
|
if (prod.size() == 1)
|
|
return parsed_type(prod[0]);
|
|
// Parenthesized product: (A * B) — used as domain in outer context
|
|
return parsed_type(prod, nullptr);
|
|
}
|
|
std::string n = parse_name();
|
|
// Handle parameterized type constructors: fun(A, B), product_prod(A, B), etc.
|
|
if (accept(token_kind::lparen)) {
|
|
// Consume type arguments — for monomorphization, we ignore them
|
|
// and return the base sort (or m_univ if the constructor result is $tType)
|
|
if (!accept(token_kind::rparen)) {
|
|
do { parse_type_expr(); } while (accept(token_kind::comma));
|
|
expect(token_kind::rparen, "')'");
|
|
}
|
|
// Return m_univ as the monomorphized result of any type constructor application
|
|
return parsed_type(m_univ);
|
|
}
|
|
return parsed_type(get_sort(n));
|
|
}
|
|
|
|
std::vector<sort*> parse_type_product_raw() {
|
|
parsed_type first = parse_type_atom();
|
|
if (!first.domain.empty() && first.range == nullptr) {
|
|
// Already a parenthesized product from nested parens
|
|
std::vector<sort*> args = first.domain;
|
|
while (accept(token_kind::star_tok)) {
|
|
parsed_type t = parse_type_atom();
|
|
if (!t.domain.empty()) {
|
|
args.insert(args.end(), t.domain.begin(), t.domain.end());
|
|
} else {
|
|
args.push_back(t.range);
|
|
}
|
|
}
|
|
return args;
|
|
}
|
|
if (!first.domain.empty()) {
|
|
// Function type as first element of product — use ho_sort
|
|
sort* ho = get_ho_sort(first.domain, first.range);
|
|
std::vector<sort*> args;
|
|
args.push_back(ho);
|
|
while (accept(token_kind::star_tok)) {
|
|
parsed_type t = parse_type_atom();
|
|
if (!t.domain.empty() && t.range != nullptr) {
|
|
args.push_back(get_ho_sort(t.domain, t.range));
|
|
} else if (!t.domain.empty()) {
|
|
args.insert(args.end(), t.domain.begin(), t.domain.end());
|
|
} else {
|
|
args.push_back(t.range);
|
|
}
|
|
}
|
|
return args;
|
|
}
|
|
std::vector<sort*> args;
|
|
args.push_back(first.range);
|
|
while (accept(token_kind::star_tok)) {
|
|
parsed_type t = parse_type_atom();
|
|
if (!t.domain.empty() && t.range != nullptr) {
|
|
args.push_back(get_ho_sort(t.domain, t.range));
|
|
} else if (!t.domain.empty()) {
|
|
args.insert(args.end(), t.domain.begin(), t.domain.end());
|
|
} else {
|
|
args.push_back(t.range);
|
|
}
|
|
}
|
|
return args;
|
|
}
|
|
|
|
parsed_type parse_type_product() {
|
|
parsed_type first = parse_type_atom();
|
|
// If atom returned a function type and no '*' follows, return it directly
|
|
if (!first.domain.empty() && first.range != nullptr && !is(token_kind::star_tok)) {
|
|
return first;
|
|
}
|
|
// Build product vector
|
|
std::vector<sort*> args;
|
|
if (!first.domain.empty() && first.range != nullptr) {
|
|
// Function type used as element in a product
|
|
args.push_back(get_ho_sort(first.domain, first.range));
|
|
} else if (!first.domain.empty() && first.range == nullptr) {
|
|
// Parenthesized product: flatten
|
|
args = first.domain;
|
|
} else {
|
|
args.push_back(first.range);
|
|
}
|
|
while (accept(token_kind::star_tok)) {
|
|
parsed_type t = parse_type_atom();
|
|
if (!t.domain.empty() && t.range != nullptr) {
|
|
args.push_back(get_ho_sort(t.domain, t.range));
|
|
} else if (!t.domain.empty()) {
|
|
args.insert(args.end(), t.domain.begin(), t.domain.end());
|
|
} else {
|
|
args.push_back(t.range);
|
|
}
|
|
}
|
|
return parsed_type(args, nullptr);
|
|
}
|
|
|
|
parsed_type parse_type_expr() {
|
|
// Handle type quantification at the expression level for proper domain/range preservation
|
|
if (is(token_kind::type_forall_tok) || is(token_kind::type_exists_tok)) {
|
|
next();
|
|
expect(token_kind::lbrack, "'['");
|
|
std::vector<sort*> type_params;
|
|
if (!accept(token_kind::rbrack)) {
|
|
do {
|
|
std::string tv = parse_name();
|
|
if (accept(token_kind::colon))
|
|
parse_type_expr(); // consume $tType annotation
|
|
m_sorts.insert_or_assign(tv, m_univ);
|
|
type_params.push_back(m_univ);
|
|
} while (accept(token_kind::comma));
|
|
expect(token_kind::rbrack, "']'");
|
|
}
|
|
expect(token_kind::colon, "':'");
|
|
parsed_type inner = parse_type_expr();
|
|
// Prepend type params to domain
|
|
if (!type_params.empty()) {
|
|
std::vector<sort*> full_domain = type_params;
|
|
full_domain.insert(full_domain.end(), inner.domain.begin(), inner.domain.end());
|
|
return parsed_type(full_domain, inner.range);
|
|
}
|
|
return inner;
|
|
}
|
|
parsed_type prod = parse_type_product();
|
|
if (accept(token_kind::gt_tok)) {
|
|
parsed_type rhs = parse_type_expr();
|
|
// prod is either a product (domain non-empty, range==nullptr) or a single sort (domain empty)
|
|
std::vector<sort*> domain;
|
|
if (!prod.domain.empty() && prod.range == nullptr) {
|
|
domain = prod.domain;
|
|
} else if (!prod.domain.empty() && prod.range != nullptr) {
|
|
// A function type as domain element — wrap it
|
|
domain.push_back(get_ho_sort(prod.domain, prod.range));
|
|
} else {
|
|
domain.push_back(prod.range);
|
|
}
|
|
if (!rhs.domain.empty()) {
|
|
// Higher-order result type: A > (B > C) flattened to (A, B) > C
|
|
domain.insert(domain.end(), rhs.domain.begin(), rhs.domain.end());
|
|
return parsed_type(domain, rhs.range);
|
|
}
|
|
return parsed_type(domain, rhs.range);
|
|
}
|
|
// No '>' follows — must be a single type or a function type from parens
|
|
if (!prod.domain.empty() && prod.range != nullptr) {
|
|
// Function type from parenthesized expression
|
|
return prod;
|
|
}
|
|
if (!prod.domain.empty() && prod.range == nullptr) {
|
|
if (prod.domain.size() != 1)
|
|
throw parse_error("type product must be followed by '>'");
|
|
return parsed_type(prod.domain[0]);
|
|
}
|
|
return parsed_type(prod.range);
|
|
}
|
|
|
|
void skip_annotations_until_rparen() {
|
|
int depth = 0;
|
|
while (!is(token_kind::eof_tok)) {
|
|
if (accept(token_kind::lparen) || accept(token_kind::lbrack)) {
|
|
++depth;
|
|
continue;
|
|
}
|
|
if (is(token_kind::rparen) || is(token_kind::rbrack)) {
|
|
if (depth == 0) return;
|
|
--depth;
|
|
next();
|
|
continue;
|
|
}
|
|
next();
|
|
}
|
|
}
|
|
|
|
void skip_balanced(token_kind open_k, token_kind close_k) {
|
|
int depth = 1;
|
|
while (depth > 0 && !is(token_kind::eof_tok)) {
|
|
if (accept(open_k)) ++depth;
|
|
else if (accept(close_k)) --depth;
|
|
else next();
|
|
}
|
|
}
|
|
|
|
expr_ref parse_term();
|
|
|
|
expr_ref parse_term_primary() {
|
|
if (accept(token_kind::lparen)) {
|
|
expr_ref e = parse_formula();
|
|
expect(token_kind::rparen, "')'");
|
|
return e;
|
|
}
|
|
if (accept(token_kind::lambda_tok)) {
|
|
return parse_lambda_expr();
|
|
}
|
|
if (accept(token_kind::minus_tok)) {
|
|
expr_ref e = parse_term_primary();
|
|
if (!m_arith.is_int_real(e))
|
|
throw parse_error("unary '-' expects arithmetic term");
|
|
return expr_ref(m_arith.mk_uminus(e), m);
|
|
}
|
|
std::string n = parse_name();
|
|
if (n == "$true") return expr_ref(m.mk_true(), m);
|
|
if (n == "$false") return expr_ref(m.mk_false(), m);
|
|
|
|
if (is_nonempty_digit_string(n)) {
|
|
return parse_numeral_from_name(n);
|
|
}
|
|
|
|
expr_ref b(m);
|
|
if (!m_last_name_quoted && is_var_name(n) && find_bound(n, b))
|
|
return b;
|
|
if (!m_last_name_quoted && should_create_implicit_var(n))
|
|
return expr_ref(get_or_create_implicit_var(n), m);
|
|
|
|
expr_ref_vector args(m);
|
|
// $ite needs special parsing: first arg is formula, rest are formulas (branches can be equalities)
|
|
if (n == "$ite") {
|
|
expect(token_kind::lparen, "'('");
|
|
args.push_back(parse_formula());
|
|
expect(token_kind::comma, "','");
|
|
args.push_back(parse_formula());
|
|
expect(token_kind::comma, "','");
|
|
args.push_back(parse_formula());
|
|
expect(token_kind::rparen, "')'");
|
|
}
|
|
else if (accept(token_kind::lparen)) {
|
|
if (!accept(token_kind::rparen)) {
|
|
do { args.push_back(parse_term()); } while (accept(token_kind::comma));
|
|
expect(token_kind::rparen, "')'");
|
|
}
|
|
}
|
|
|
|
// Table-driven prefix operator dispatch
|
|
auto op_it = m_ops.find(n);
|
|
if (op_it != m_ops.end() && !op_it->second.is_infix) {
|
|
return op_it->second.builder(args);
|
|
}
|
|
|
|
func_decl* f = mk_decl_or_ho_const(n, args.size(), false);
|
|
if (!args.empty()) coerce_args(f, args);
|
|
return expr_ref(args.empty() ? m.mk_const(f) : m.mk_app(f, args.size(), args.data()), m);
|
|
}
|
|
|
|
expr_ref parse_formula();
|
|
|
|
expr_ref apply_at(expr_ref e) {
|
|
if (!is(token_kind::at_tok)) return e;
|
|
|
|
// @ corresponds to array select (function application)
|
|
while (accept(token_kind::at_tok)) {
|
|
expr_ref arg = parse_at_arg();
|
|
sort* e_sort = e->get_sort();
|
|
if (!m_array.is_array(e_sort)) {
|
|
std::ostringstream out;
|
|
out << "application operator (@) requires array/function type on left-hand side, got sort " << e_sort->get_name();
|
|
throw parse_error(out.str());
|
|
}
|
|
e = expr_ref(m_array.mk_select(e, arg), m);
|
|
}
|
|
return e;
|
|
}
|
|
|
|
// Parse an argument to @ — can be a term, a formula (negation, quantifier, parens with connectives), or a lambda
|
|
expr_ref parse_at_arg() {
|
|
if (accept(token_kind::not_tok)) {
|
|
expr_ref e = parse_at_arg();
|
|
return expr_ref(m.mk_not(e), m);
|
|
}
|
|
if (accept(token_kind::lambda_tok)) {
|
|
return parse_lambda_expr();
|
|
}
|
|
if (accept(token_kind::lparen)) {
|
|
expr_ref e = parse_formula();
|
|
expect(token_kind::rparen, "')'");
|
|
// Do NOT call apply_at here — outer apply_at owns the remaining @ tokens
|
|
return e;
|
|
}
|
|
if (is(token_kind::forall_tok) || is(token_kind::exists_tok)) {
|
|
bool is_forall = is(token_kind::forall_tok);
|
|
next();
|
|
expect(token_kind::lbrack, "'['");
|
|
ptr_vector<app> vars;
|
|
std::unordered_map<std::string, app*> scope;
|
|
if (!accept(token_kind::rbrack)) {
|
|
do {
|
|
std::string v = parse_name();
|
|
sort* s = m_univ;
|
|
if (accept(token_kind::colon)) {
|
|
parsed_type t = parse_type_expr();
|
|
if (!t.domain.empty()) s = get_ho_sort(t.domain, t.range);
|
|
else s = t.range;
|
|
}
|
|
app* c = m.mk_const(symbol(v), s);
|
|
m_pinned_exprs.push_back(c);
|
|
vars.push_back(c);
|
|
scope.emplace(v, c);
|
|
} while (accept(token_kind::comma));
|
|
expect(token_kind::rbrack, "']'");
|
|
}
|
|
expect(token_kind::colon, "':'");
|
|
m_bound.push_back(scope);
|
|
// Quantifier body in @-arg should NOT consume @ — those belong to enclosing application
|
|
bool save_in_at_arg = m_in_at_arg;
|
|
m_in_at_arg = true;
|
|
expr_ref body = parse_formula();
|
|
m_in_at_arg = save_in_at_arg;
|
|
m_bound.pop_back();
|
|
return mk_quantifier(is_forall, vars, body);
|
|
}
|
|
// Simple term (name with optional function args) — no @ consumption here
|
|
return parse_term_primary();
|
|
}
|
|
|
|
// Build an arithmetic expression from a TPTP function name and arguments
|
|
// Coerce two expressions to have the same sort for equality.
|
|
// If sorts already match, returns lhs unchanged. Otherwise coerces the
|
|
// 0-arity constant side to match the other's sort. If that's not possible,
|
|
// coerces both to m_univ.
|
|
expr_ref coerce_eq(expr_ref lhs, expr_ref& rhs) {
|
|
if (lhs->get_sort() == rhs->get_sort()) return lhs;
|
|
// Try coercing one side (0-arity constants can be reinterpreted)
|
|
if (is_app(lhs) && to_app(lhs)->get_num_args() == 0 && lhs->get_sort() != rhs->get_sort()) {
|
|
func_decl* fd = m.mk_func_decl(to_app(lhs)->get_decl()->get_name(), 0, static_cast<sort**>(nullptr), rhs->get_sort());
|
|
m_pinned_decls.push_back(fd);
|
|
return expr_ref(m.mk_const(fd), m);
|
|
}
|
|
if (is_app(rhs) && to_app(rhs)->get_num_args() == 0 && lhs->get_sort() != rhs->get_sort()) {
|
|
func_decl* fd = m.mk_func_decl(to_app(rhs)->get_decl()->get_name(), 0, static_cast<sort**>(nullptr), lhs->get_sort());
|
|
m_pinned_decls.push_back(fd);
|
|
rhs = m.mk_const(fd);
|
|
return lhs;
|
|
}
|
|
// Last resort: coerce both to m_univ
|
|
if (is_app(lhs) && to_app(lhs)->get_num_args() == 0) {
|
|
func_decl* fd = m.mk_func_decl(to_app(lhs)->get_decl()->get_name(), 0, static_cast<sort**>(nullptr), m_univ);
|
|
m_pinned_decls.push_back(fd);
|
|
lhs = m.mk_const(fd);
|
|
}
|
|
if (is_app(rhs) && to_app(rhs)->get_num_args() == 0) {
|
|
func_decl* fd = m.mk_func_decl(to_app(rhs)->get_decl()->get_name(), 0, static_cast<sort**>(nullptr), m_univ);
|
|
m_pinned_decls.push_back(fd);
|
|
rhs = m.mk_const(fd);
|
|
}
|
|
return lhs;
|
|
}
|
|
|
|
expr_ref parse_atomic_formula() {
|
|
if (accept(token_kind::lparen)) {
|
|
// Parentheses create a new scope for @ consumption
|
|
bool save_in_at_arg = m_in_at_arg;
|
|
m_in_at_arg = false;
|
|
expr_ref e = parse_formula();
|
|
expect(token_kind::rparen, "')'");
|
|
m_in_at_arg = save_in_at_arg;
|
|
return e;
|
|
}
|
|
|
|
// Handle negative numerals in formula position: -2 = $uminus(2)
|
|
if (accept(token_kind::minus_tok)) {
|
|
expr_ref t = parse_term();
|
|
return expr_ref(m_arith.mk_uminus(t), m);
|
|
}
|
|
|
|
std::string n = parse_name();
|
|
if (n == "$true") return expr_ref(m.mk_true(), m);
|
|
if (n == "$false") return expr_ref(m.mk_false(), m);
|
|
|
|
if (is_nonempty_digit_string(n)) {
|
|
return parse_numeral_from_name(n);
|
|
}
|
|
|
|
expr_ref_vector args(m);
|
|
// $ite needs special parsing: first arg is formula, rest are formulas (branches can be equalities)
|
|
if (n == "$ite") {
|
|
expect(token_kind::lparen, "'('");
|
|
args.push_back(parse_formula());
|
|
expect(token_kind::comma, "','");
|
|
args.push_back(parse_formula());
|
|
expect(token_kind::comma, "','");
|
|
args.push_back(parse_formula());
|
|
expect(token_kind::rparen, "')'");
|
|
}
|
|
else if (accept(token_kind::lparen)) {
|
|
if (!accept(token_kind::rparen)) {
|
|
do { args.push_back(parse_term()); } while (accept(token_kind::comma));
|
|
expect(token_kind::rparen, "')'");
|
|
}
|
|
}
|
|
|
|
// Table-driven prefix operator dispatch
|
|
auto op_it = m_ops.find(n);
|
|
if (op_it != m_ops.end() && !op_it->second.is_infix) {
|
|
return op_it->second.builder(args);
|
|
}
|
|
|
|
expr_ref lhs(m);
|
|
bool has_lhs = false;
|
|
if (args.empty()) {
|
|
expr_ref b(m);
|
|
if (!m_last_name_quoted && is_var_name(n) && find_bound(n, b)) {
|
|
lhs = b;
|
|
has_lhs = true;
|
|
}
|
|
else if (!m_last_name_quoted && should_create_implicit_var(n)) {
|
|
lhs = expr_ref(get_or_create_implicit_var(n), m);
|
|
has_lhs = true;
|
|
}
|
|
}
|
|
|
|
if (has_lhs)
|
|
return lhs;
|
|
|
|
auto typed = m_typed_decls.find(mk_typed_key(n, args.size()));
|
|
if (typed != m_typed_decls.end()) {
|
|
func_decl* f = args.empty() ? mk_decl_or_ho_const(n, 0, false) : mk_decl(n, args.size(), false);
|
|
if (!args.empty()) coerce_args(f, args);
|
|
return expr_ref(args.empty() ? m.mk_const(f) : m.mk_app(f, args.size(), args.data()), m);
|
|
}
|
|
|
|
func_decl* pred = mk_decl_or_ho_const(n, args.size(), true);
|
|
if (!args.empty()) coerce_args(pred, args);
|
|
return expr_ref(args.empty() ? m.mk_const(pred) : m.mk_app(pred, args.size(), args.data()), m);
|
|
}
|
|
|
|
// Parse THF lambda expression: ^ [X: T, ...] : body
|
|
// Uses Z3's native lambda construct, which produces array terms.
|
|
expr_ref parse_lambda_expr() {
|
|
expect(token_kind::lbrack, "'['");
|
|
ptr_vector<app> vars;
|
|
std::unordered_map<std::string, app*> scope;
|
|
if (!accept(token_kind::rbrack)) {
|
|
do {
|
|
std::string v = parse_name();
|
|
sort* s = m_univ;
|
|
if (accept(token_kind::colon)) {
|
|
parsed_type t = parse_type_expr();
|
|
if (!t.domain.empty()) {
|
|
s = get_ho_sort(t.domain, t.range);
|
|
} else if (t.range) {
|
|
s = t.range;
|
|
}
|
|
}
|
|
app* c = m.mk_const(symbol(v), s);
|
|
m_pinned_exprs.push_back(c);
|
|
vars.push_back(c);
|
|
scope.emplace(v, c);
|
|
} while (accept(token_kind::comma));
|
|
expect(token_kind::rbrack, "']'");
|
|
}
|
|
expect(token_kind::colon, "':'");
|
|
m_bound.push_back(scope);
|
|
// Lambda body does NOT consume @ — @ belongs to the enclosing application
|
|
bool save_in_at_arg = m_in_at_arg;
|
|
m_in_at_arg = true;
|
|
expr_ref body = parse_formula();
|
|
m_in_at_arg = save_in_at_arg;
|
|
m_bound.pop_back();
|
|
if (vars.empty())
|
|
return body;
|
|
// Create nested single-variable lambdas (curried) to match our curried array encoding.
|
|
// ^[X:A, Y:B] : body becomes ^[X:A] : (^[Y:B] : body) with sort Array(A, Array(B, body_sort))
|
|
expr_ref result = body;
|
|
for (int i = (int)vars.size() - 1; i >= 0; --i) {
|
|
expr_ref abs_body(m);
|
|
expr_abstract(m, 0, 1, (expr* const*)&vars[i], result, abs_body);
|
|
sort* s = vars[i]->get_sort();
|
|
symbol nm = vars[i]->get_decl()->get_name();
|
|
result = expr_ref(m.mk_lambda(1, &s, &nm, abs_body), m);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
expr_ref parse_unary_formula() {
|
|
if (accept(token_kind::not_tok)) {
|
|
expr_ref e = parse_unary_formula();
|
|
return expr_ref(m.mk_not(e), m);
|
|
}
|
|
|
|
if (accept(token_kind::lambda_tok)) {
|
|
// THF lambda: ^ [X: T, ...] : body
|
|
// Approximate as a fresh constant (first-order approximation)
|
|
return parse_lambda_expr();
|
|
}
|
|
|
|
if (is(token_kind::forall_tok) || is(token_kind::exists_tok)) {
|
|
bool is_forall = is(token_kind::forall_tok);
|
|
next();
|
|
expect(token_kind::lbrack, "'['");
|
|
|
|
ptr_vector<app> vars;
|
|
std::unordered_map<std::string, app*> scope;
|
|
if (!accept(token_kind::rbrack)) {
|
|
do {
|
|
std::string v = parse_name();
|
|
sort* s = m_univ;
|
|
if (accept(token_kind::colon)) {
|
|
parsed_type t = parse_type_expr();
|
|
if (!t.domain.empty()) {
|
|
// Higher-order variable type — use uninterpreted sort approximation
|
|
s = get_ho_sort(t.domain, t.range);
|
|
} else {
|
|
s = t.range;
|
|
}
|
|
}
|
|
// Monomorphize: $tType-sorted variables become U-sorted
|
|
// and register them as sorts for subsequent type references
|
|
if (is_ttype(s)) {
|
|
s = m_univ;
|
|
m_sorts.insert_or_assign(v, m_univ);
|
|
}
|
|
app* c = m.mk_const(symbol(v), s);
|
|
m_pinned_exprs.push_back(c);
|
|
vars.push_back(c);
|
|
scope.emplace(v, c);
|
|
}
|
|
while (accept(token_kind::comma));
|
|
expect(token_kind::rbrack, "']'");
|
|
}
|
|
expect(token_kind::colon, "':'");
|
|
m_bound.push_back(scope);
|
|
expr_ref body = parse_formula();
|
|
m_bound.pop_back();
|
|
return mk_quantifier(is_forall, vars, body);
|
|
}
|
|
|
|
// Type quantification in formula context: !>[A: $tType, ...] : body
|
|
// Erase type variables and parse body as formula
|
|
if (is(token_kind::type_forall_tok) || is(token_kind::type_exists_tok)) {
|
|
next();
|
|
expect(token_kind::lbrack, "'['");
|
|
if (!accept(token_kind::rbrack)) {
|
|
do {
|
|
std::string tv = parse_name();
|
|
if (accept(token_kind::colon))
|
|
parse_type_expr(); // consume $tType annotation
|
|
m_sorts.insert_or_assign(tv, m_univ);
|
|
} while (accept(token_kind::comma));
|
|
expect(token_kind::rbrack, "']'");
|
|
}
|
|
expect(token_kind::colon, "':'");
|
|
return parse_formula();
|
|
}
|
|
|
|
return parse_atomic_formula();
|
|
}
|
|
|
|
expr_ref parse_expr(unsigned min_prec, bool consume_at = true) {
|
|
expr_ref e = parse_unary_formula();
|
|
for (;;) {
|
|
// Handle @ (function application) with highest precedence
|
|
// But NOT when we're inside a lambda body that's an @ argument
|
|
if (consume_at && !m_in_at_arg && is(token_kind::at_tok)) {
|
|
next();
|
|
expr_ref arg = parse_at_arg();
|
|
sort* e_sort = e->get_sort();
|
|
if (!m_array.is_array(e_sort)) {
|
|
std::ostringstream out;
|
|
out << "application operator (@) requires array/function type on left-hand side, got sort " << e_sort->get_name();
|
|
throw parse_error(out.str());
|
|
}
|
|
e = expr_ref(m_array.mk_select(e, arg), m);
|
|
continue;
|
|
}
|
|
char const* op_name = token_to_op_name();
|
|
if (!op_name) break;
|
|
auto it = m_ops.find(op_name);
|
|
if (it == m_ops.end() || !it->second.is_infix) break;
|
|
if (it->second.precedence < min_prec) break;
|
|
next(); // consume the operator token
|
|
unsigned next_prec = it->second.right_assoc ? it->second.precedence : it->second.precedence + 1;
|
|
expr_ref rhs = parse_expr(next_prec, consume_at);
|
|
expr_ref_vector args(m);
|
|
args.push_back(e);
|
|
args.push_back(rhs);
|
|
e = it->second.builder(args);
|
|
}
|
|
return e;
|
|
}
|
|
|
|
void parse_type_decl_formula() {
|
|
unsigned lparen_count = 0;
|
|
while (accept(token_kind::lparen)) ++lparen_count;
|
|
std::string name = parse_name();
|
|
expect(token_kind::colon, "':'");
|
|
parsed_type t = parse_type_expr();
|
|
while (lparen_count-- > 0)
|
|
expect(token_kind::rparen, "')'");
|
|
|
|
if (t.domain.empty() && is_ttype(t.range)) {
|
|
// Sort declaration: monomorphize to m_univ
|
|
m_sorts.insert_or_assign(name, m_univ);
|
|
return;
|
|
}
|
|
|
|
// Monomorphize: replace $tType in domain/range with m_univ
|
|
for (auto& s : t.domain) {
|
|
if (is_ttype(s)) s = m_univ;
|
|
}
|
|
if (t.range && is_ttype(t.range)) t.range = m_univ;
|
|
|
|
m_typed_decls.insert_or_assign(mk_typed_key(name, t.domain.size()), std::make_pair(t.domain, t.range));
|
|
}
|
|
|
|
static bool file_exists(std::string const& f) {
|
|
std::ifstream in(f);
|
|
return !in.fail();
|
|
}
|
|
|
|
static bool is_absolute_path(std::string const& name) {
|
|
return !name.empty() &&
|
|
(name[0] == '/' ||
|
|
(name.size() >= 2 && std::isalpha(static_cast<unsigned char>(name[0])) && name[1] == ':'));
|
|
}
|
|
|
|
std::string dirname(std::string const& f) const {
|
|
size_t idx = f.find_last_of("/\\");
|
|
return idx == std::string::npos ? "." : f.substr(0, idx);
|
|
}
|
|
|
|
static std::string normalize_path(std::string path) {
|
|
#ifdef _WIN32
|
|
for (auto& c : path)
|
|
if (c == '/') c = '\\';
|
|
#endif
|
|
return path;
|
|
}
|
|
|
|
std::string resolve_include(std::string const& curr_file, std::string const& name) const {
|
|
if (is_absolute_path(name))
|
|
return normalize_path(name);
|
|
// Try relative to current file's directory
|
|
std::string local = normalize_path(dirname(curr_file) + "/" + name);
|
|
if (file_exists(local)) return local;
|
|
// Try TPTP environment variable (standard TPTP convention)
|
|
char const* root = std::getenv("TPTP");
|
|
if (root) {
|
|
std::string env = normalize_path(std::string(root) + "/" + name);
|
|
if (file_exists(env)) return env;
|
|
}
|
|
// Try relative to current working directory (common when running from TPTP root)
|
|
std::string cwd_relative = normalize_path(name);
|
|
if (file_exists(cwd_relative)) return cwd_relative;
|
|
return local;
|
|
}
|
|
|
|
void parse_include(std::string const& curr_file) {
|
|
expect(token_kind::lparen, "'('");
|
|
std::string file = parse_name();
|
|
if (accept(token_kind::comma)) {
|
|
if (accept(token_kind::lbrack)) {
|
|
skip_balanced(token_kind::lbrack, token_kind::rbrack);
|
|
}
|
|
else {
|
|
skip_annotations_until_rparen();
|
|
}
|
|
}
|
|
expect(token_kind::rparen, "')'");
|
|
expect(token_kind::dot, "'.'");
|
|
parse_file(resolve_include(curr_file, file));
|
|
}
|
|
|
|
void parse_annotated() {
|
|
expect(token_kind::lparen, "'('");
|
|
parse_name();
|
|
expect(token_kind::comma, "','");
|
|
std::string role = to_lower(parse_name());
|
|
expect(token_kind::comma, "','");
|
|
|
|
if (role == "type") {
|
|
parse_type_decl_formula();
|
|
}
|
|
else {
|
|
implicit_var_scope implicit_scope;
|
|
scoped_implicit_vars scoped(*this, implicit_scope);
|
|
expr_ref f = parse_formula();
|
|
if (!implicit_scope.order.empty()) {
|
|
f = mk_quantifier(true, implicit_scope.order, f);
|
|
}
|
|
if (role == "conjecture") {
|
|
m_has_conjecture = true;
|
|
if (m.is_bool(f))
|
|
f = m.mk_not(f);
|
|
}
|
|
// Only assert Bool-sorted formulas; non-Bool results from
|
|
// incomplete higher-order approximation are silently skipped.
|
|
if (m.is_bool(f))
|
|
m_cmd.assert_expr(f);
|
|
}
|
|
|
|
if (accept(token_kind::comma)) {
|
|
skip_annotations_until_rparen();
|
|
}
|
|
expect(token_kind::rparen, "')'");
|
|
expect(token_kind::dot, "'.'");
|
|
}
|
|
|
|
void parse_toplevel(std::string const& current_file) {
|
|
while (!is(token_kind::eof_tok)) {
|
|
std::string kw = to_lower(parse_name());
|
|
if (kw == "include") {
|
|
parse_include(current_file);
|
|
}
|
|
else if (kw == "fof" || kw == "cnf" || kw == "tff" || kw == "thf") {
|
|
parse_annotated();
|
|
}
|
|
else {
|
|
std::ostringstream out;
|
|
out << "unsupported TPTP unit '" << kw << "' at " << loc();
|
|
throw parse_error(out.str());
|
|
}
|
|
}
|
|
}
|
|
|
|
public:
|
|
tptp_parser(cmd_context& cmd):
|
|
m_cmd(cmd),
|
|
m(m_cmd.m()),
|
|
m_arith(m),
|
|
m_array(m),
|
|
m_pinned_sorts(m),
|
|
m_pinned_decls(m),
|
|
m_pinned_exprs(m),
|
|
m_univ(m.mk_uninterpreted_sort(symbol("U"))) {
|
|
m_pinned_sorts.push_back(m_univ);
|
|
sort* tType = m.mk_uninterpreted_sort(symbol("$tType"));
|
|
m_pinned_sorts.push_back(tType);
|
|
m_sorts.emplace("$tType", tType);
|
|
m_sorts.emplace("$i", m_univ);
|
|
m_sorts.emplace("$o", m.mk_bool_sort());
|
|
m_sorts.emplace("$int", m_arith.mk_int());
|
|
m_sorts.emplace("$rat", m_arith.mk_real());
|
|
m_sorts.emplace("$real", m_arith.mk_real());
|
|
init_op_table();
|
|
}
|
|
|
|
void init_op_table() {
|
|
// Prefix arithmetic predicates (is_infix=false, precedence=0)
|
|
m_ops["$less"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$less");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_lt(a, b), m);
|
|
}};
|
|
m_ops["$lesseq"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$lesseq");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_le(a, b), m);
|
|
}};
|
|
m_ops["$greater"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$greater");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_gt(a, b), m);
|
|
}};
|
|
m_ops["$greatereq"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$greatereq");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_ge(a, b), m);
|
|
}};
|
|
m_ops["$uminus"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$uminus");
|
|
return expr_ref(m_arith.mk_uminus(args[0]), m);
|
|
}};
|
|
m_ops["$sum"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$sum");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_add(a, b), m);
|
|
}};
|
|
m_ops["$plus"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$plus");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_add(a, b), m);
|
|
}};
|
|
m_ops["$difference"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$difference");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_sub(a, b), m);
|
|
}};
|
|
m_ops["$product"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$product");
|
|
auto [a, b] = coerce_arith2(args);
|
|
return expr_ref(m_arith.mk_mul(a, b), m);
|
|
}};
|
|
m_ops["$quotient"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$quotient");
|
|
return mk_quotient(args);
|
|
}};
|
|
m_ops["$quotient_e"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$quotient_e");
|
|
return mk_quotient(args);
|
|
}};
|
|
m_ops["$quotient_t"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$quotient_t");
|
|
return mk_quotient(args);
|
|
}};
|
|
m_ops["$quotient_f"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$quotient_f");
|
|
return mk_quotient(args);
|
|
}};
|
|
m_ops["$remainder_e"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$remainder_e");
|
|
return expr_ref(m_arith.mk_mod(args[0], args[1]), m);
|
|
}};
|
|
m_ops["$remainder_t"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$remainder_t");
|
|
return expr_ref(m_arith.mk_mod(args[0], args[1]), m);
|
|
}};
|
|
m_ops["$remainder_f"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 2, "$remainder_f");
|
|
return expr_ref(m_arith.mk_mod(args[0], args[1]), m);
|
|
}};
|
|
m_ops["$floor"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$floor");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_int(a)) return a;
|
|
return expr_ref(m_arith.mk_to_int(a), m);
|
|
}};
|
|
m_ops["$ceiling"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$ceiling");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_int(a)) return a;
|
|
// ceiling(x) = -floor(-x)
|
|
return expr_ref(m_arith.mk_uminus(m_arith.mk_to_int(m_arith.mk_uminus(a))), m);
|
|
}};
|
|
m_ops["$truncate"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$truncate");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_int(a)) return a;
|
|
// truncate(x) = if x >= 0 then floor(x) else ceiling(x)
|
|
expr_ref zero(m_arith.mk_real(0), m);
|
|
expr_ref fl(m_arith.mk_to_int(a), m);
|
|
expr_ref neg_fl(m_arith.mk_uminus(m_arith.mk_to_int(m_arith.mk_uminus(a))), m);
|
|
return expr_ref(m.mk_ite(m_arith.mk_ge(a, zero), fl, neg_fl), m);
|
|
}};
|
|
m_ops["$round"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$round");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_int(a)) return a;
|
|
// round to nearest even
|
|
expr_ref i(m_arith.mk_to_int(a), m);
|
|
expr_ref half(m_arith.mk_add(m_arith.mk_to_real(i), m_arith.mk_numeral(rational(1, 2), false)), m);
|
|
expr_ref i1(m_arith.mk_add(i, m_arith.mk_int(1)), m);
|
|
expr_ref is_even(m.mk_eq(m_arith.mk_mod(i, m_arith.mk_int(2)), m_arith.mk_int(0)), m);
|
|
return expr_ref(m.mk_ite(m_arith.mk_gt(a, half), i1,
|
|
m.mk_ite(m.mk_eq(a, half), m.mk_ite(is_even, i, i1), i)), m);
|
|
}};
|
|
m_ops["$to_int"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$to_int");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_int(a)) return a;
|
|
return expr_ref(m_arith.mk_to_int(a), m);
|
|
}};
|
|
m_ops["$to_real"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$to_real");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_real(a)) return a;
|
|
return expr_ref(m_arith.mk_to_real(a), m);
|
|
}};
|
|
m_ops["$to_rat"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$to_rat");
|
|
expr_ref a(args[0], m);
|
|
if (m_arith.is_real(a)) return a;
|
|
return expr_ref(m_arith.mk_to_real(a), m);
|
|
}};
|
|
m_ops["$is_int"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$is_int");
|
|
return expr_ref(m_arith.mk_is_int(args[0]), m);
|
|
}};
|
|
m_ops["$is_rat"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$is_rat");
|
|
expr_ref a(args[0], m);
|
|
return mk_is_rat(a);
|
|
}};
|
|
m_ops["$distinct"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
if (args.size() == 2) return expr_ref(m.mk_not(m.mk_eq(args[0], args[1])), m);
|
|
return expr_ref(m.mk_distinct(args.size(), args.data()), m);
|
|
}};
|
|
m_ops["$ite"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 3, "$ite");
|
|
expr_ref cond(args[0], m), t(args[1], m), f(args[2], m);
|
|
if (!m.is_bool(cond))
|
|
throw parse_error("$ite expects Bool condition as first argument");
|
|
return expr_ref(m.mk_ite(cond, t, f), m);
|
|
}};
|
|
m_ops["$abs"] = { false, 0, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
check_arith_arity(args, 1, "$abs");
|
|
expr_ref a(args[0], m);
|
|
if (!m_arith.is_int_real(a))
|
|
throw parse_error("$abs expects arithmetic argument");
|
|
expr_ref zero(m_arith.is_int(a) ? m_arith.mk_int(0) : m_arith.mk_numeral(rational(0), false), m);
|
|
return expr_ref(m.mk_ite(m_arith.mk_ge(a, zero), a, expr_ref(m_arith.mk_uminus(a), m)), m);
|
|
}};
|
|
m_ops["$true"] = { false, 0, false, [&](expr_ref_vector const&) -> expr_ref {
|
|
return expr_ref(m.mk_true(), m);
|
|
}};
|
|
m_ops["$false"] = { false, 0, false, [&](expr_ref_vector const&) -> expr_ref {
|
|
return expr_ref(m.mk_false(), m);
|
|
}};
|
|
|
|
// Infix logical operators (token-based, matched by token_to_op_name)
|
|
m_ops["<=>"] = { true, PREC_IFF, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_iff(args[0], args[1]), m);
|
|
}};
|
|
m_ops["<~>"] = { true, PREC_IFF, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_not(m.mk_iff(args[0], args[1])), m);
|
|
}};
|
|
m_ops["=>"] = { true, PREC_IMPLIES, true, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_implies(args[0], args[1]), m);
|
|
}};
|
|
m_ops["<="] = { true, PREC_IMPLIES, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_implies(args[1], args[0]), m);
|
|
}};
|
|
m_ops["|"] = { true, PREC_OR, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_or(args[0], args[1]), m);
|
|
}};
|
|
m_ops["~|"] = { true, PREC_OR, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_not(m.mk_or(args[0], args[1])), m);
|
|
}};
|
|
m_ops["&"] = { true, PREC_AND, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_and(args[0], args[1]), m);
|
|
}};
|
|
m_ops["~&"] = { true, PREC_AND, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
return expr_ref(m.mk_not(m.mk_and(args[0], args[1])), m);
|
|
}};
|
|
m_ops["="] = { true, PREC_EQ, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
expr_ref lhs(args[0], m);
|
|
expr_ref rhs(args[1], m);
|
|
lhs = coerce_eq(lhs, rhs);
|
|
return expr_ref(m.mk_eq(lhs, rhs), m);
|
|
}};
|
|
m_ops["!="] = { true, PREC_EQ, false, [&](expr_ref_vector const& args) -> expr_ref {
|
|
expr_ref lhs(args[0], m);
|
|
expr_ref rhs(args[1], m);
|
|
lhs = coerce_eq(lhs, rhs);
|
|
return expr_ref(m.mk_not(m.mk_eq(lhs, rhs)), m);
|
|
}};
|
|
}
|
|
|
|
void parse_input(std::istream& in, std::string const& current_file) {
|
|
// Save parser state so that included files don't clobber the caller's lexer.
|
|
std::string saved_input = std::move(m_input);
|
|
std::unique_ptr<lexer> saved_lex = std::move(m_lex);
|
|
token saved_curr = m_curr;
|
|
|
|
std::ostringstream buf;
|
|
buf << in.rdbuf();
|
|
m_input = buf.str();
|
|
m_lex = std::make_unique<lexer>(m_input);
|
|
next();
|
|
parse_toplevel(current_file);
|
|
|
|
// Restore caller's parser state.
|
|
m_input = std::move(saved_input);
|
|
m_lex = std::move(saved_lex);
|
|
m_curr = saved_curr;
|
|
}
|
|
|
|
void parse_file(std::string const& filename) {
|
|
if (!m_seen_files.insert(filename).second) return;
|
|
std::ifstream in(filename);
|
|
if (in.fail()) {
|
|
std::ostringstream out;
|
|
out << "failed to open file '" << filename << "'";
|
|
throw parse_error(out.str());
|
|
}
|
|
parse_input(in, filename);
|
|
}
|
|
|
|
void parse_stream(std::istream& in) {
|
|
parse_input(in, ".");
|
|
}
|
|
|
|
bool has_conjecture() const { return m_has_conjecture; }
|
|
};
|
|
|
|
expr_ref tptp_parser::parse_term() {
|
|
expr_ref e = parse_term_primary();
|
|
if (!is(token_kind::at_tok)) return e;
|
|
// @ corresponds to array select (function application)
|
|
while (accept(token_kind::at_tok)) {
|
|
expr_ref arg = parse_at_arg();
|
|
sort* e_sort = e->get_sort();
|
|
if (!m_array.is_array(e_sort)) {
|
|
std::ostringstream out;
|
|
out << "application operator (@) requires array/function type on left-hand side, got sort " << e_sort->get_name();
|
|
throw parse_error(out.str());
|
|
}
|
|
e = expr_ref(m_array.mk_select(e, arg), m);
|
|
}
|
|
return e;
|
|
}
|
|
|
|
expr_ref tptp_parser::parse_formula() {
|
|
return parse_expr(PREC_IFF);
|
|
}
|
|
|
|
}
|
|
|
|
static unsigned read_tptp_stream(std::istream& in, char const* current_file) {
|
|
register_on_timeout_proc(on_timeout);
|
|
try {
|
|
cmd_context ctx;
|
|
ctx.set_solver_factory(mk_smt_strategic_solver_factory());
|
|
|
|
tptp_parser p(ctx);
|
|
p.parse_input(in, current_file ? current_file : ".");
|
|
|
|
// Suppress default check-sat output; TPTP frontend reports SZS status explicitly.
|
|
std::ostringstream sink;
|
|
scoped_regular_stream scoped_stream(ctx, sink);
|
|
ctx.check_sat(0, nullptr);
|
|
switch (ctx.cs_state()) {
|
|
case cmd_context::css_unsat:
|
|
if (p.has_conjecture()) std::cout << "% SZS status Theorem\n";
|
|
else std::cout << "% SZS status Unsatisfiable\n";
|
|
break;
|
|
case cmd_context::css_sat:
|
|
if (p.has_conjecture()) std::cout << "% SZS status CounterSatisfiable\n";
|
|
else std::cout << "% SZS status Satisfiable\n";
|
|
if (g_display_model) {
|
|
model_ref mdl;
|
|
if (ctx.is_model_available(mdl))
|
|
ctx.display_model(mdl);
|
|
}
|
|
break;
|
|
case cmd_context::css_unknown:
|
|
std::cout << "% SZS status GaveUp\n";
|
|
{
|
|
std::string reason = ctx.reason_unknown();
|
|
if (!reason.empty()) std::cout << "% SZS reason " << reason << "\n";
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (g_display_statistics) {
|
|
ctx.set_regular_stream("stdout");
|
|
ctx.display_statistics();
|
|
}
|
|
return 0;
|
|
}
|
|
catch (parse_error const& ex) {
|
|
std::cerr << "TPTP parse error: " << ex.what() << "\n";
|
|
return ERR_PARSER;
|
|
}
|
|
catch (z3_error const& ex) {
|
|
if (ex.error_code() == ERR_TIMEOUT) {
|
|
std::cout << "% SZS status Timeout\n";
|
|
return 0;
|
|
}
|
|
std::cerr << "TPTP frontend error: " << ex.what() << "\n";
|
|
return ERR_INTERNAL_FATAL;
|
|
}
|
|
catch (z3_exception const& ex) {
|
|
std::cerr << "TPTP frontend error: " << ex.what() << "\n";
|
|
return ERR_INTERNAL_FATAL;
|
|
}
|
|
}
|
|
|
|
unsigned read_tptp(char const* file_name) {
|
|
if (!file_name)
|
|
return read_tptp_stream(std::cin, ".");
|
|
std::ifstream in(file_name);
|
|
if (in.fail()) {
|
|
std::cerr << "TPTP parse error: failed to open file '" << file_name << "'\n";
|
|
return ERR_PARSER;
|
|
}
|
|
return read_tptp_stream(in, file_name);
|
|
}
|
|
|
|
unsigned read_tptp_string(char const* input) {
|
|
std::istringstream in(input ? input : "");
|
|
return read_tptp_stream(in, "<string>");
|
|
}
|