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add intersection using symbolic automata facility

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-02-28 17:05:12 -08:00
parent 4cf72e23e6
commit df2d7e7628
8 changed files with 561 additions and 28 deletions
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33
src/smt/theory_seq.cpp
View file

@ -25,6 +25,7 @@ Revision History:
#include "theory_seq.h"
#include "ast_trail.h"
#include "theory_arith.h"
#include "smt_kernel.h"
using namespace smt;
@ -36,6 +37,21 @@ struct display_expr {
}
};
class seq_expr_solver : public expr_solver {
kernel m_kernel;
public:
seq_expr_solver(ast_manager& m, smt_params& fp):
m_kernel(m, fp)
{}
virtual lbool check_sat(expr* e) {
m_kernel.push();
m_kernel.assert_expr(e);
lbool r = m_kernel.check();
m_kernel.pop(1);
return r;
}
};
void theory_seq::solution_map::update(expr* e, expr* r, dependency* d) {
@ -199,26 +215,31 @@ theory_seq::theory_seq(ast_manager& m):
m_new_solution(false),
m_new_propagation(false),
m_mk_aut(m) {
m_prefix = "seq.prefix.suffix";
m_suffix = "seq.suffix.prefix";
m_accept = "aut.accept";
m_reject = "aut.reject";
m_prefix = "seq.p.suffix";
m_suffix = "seq.s.prefix";
m_accept = "aut.accept";
m_reject = "aut.reject";
m_tail = "seq.tail";
m_nth = "seq.nth";
m_seq_first = "seq.first";
m_seq_last = "seq.last";
m_indexof_left = "seq.indexof.left";
m_indexof_right = "seq.indexof.right";
m_indexof_left = "seq.idx.left";
m_indexof_right = "seq.idx.right";
m_aut_step = "aut.step";
m_pre = "seq.pre"; // (seq.pre s l): prefix of string s of length l
m_post = "seq.post"; // (seq.post s l): suffix of string s of length l
m_eq = "seq.eq";
}
theory_seq::~theory_seq() {
m_trail_stack.reset();
}
void theory_seq::init(context* ctx) {
theory::init(ctx);
m_mk_aut.set_solver(alloc(seq_expr_solver, m, get_context().get_fparams()));
}
final_check_status theory_seq::final_check_eh() {
TRACE("seq", display(tout << "level: " << get_context().get_scope_level() << "\n"););

1
src/smt/theory_seq.h
View file

@ -332,6 +332,7 @@ namespace smt {
obj_hashtable<expr> m_fixed; // string variables that are fixed length.
virtual void init(context* ctx);
virtual final_check_status final_check_eh();
virtual bool internalize_atom(app* atom, bool) { return internalize_term(atom); }
virtual bool internalize_term(app*);