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https://github.com/Z3Prover/z3
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46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#include "nlarith_util.h"
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#include "arith_decl_plugin.h"
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#include "ast_pp.h"
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void tst_nlarith_util() {
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ast_manager M;
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M.register_decl_plugins();
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arith_util A(M);
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sort_ref R(A.mk_real(), M);
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app_ref one(A.mk_numeral(rational(1), false), M);
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app_ref two(A.mk_numeral(rational(2), false), M);
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app_ref ten(A.mk_numeral(rational(10), false), M);
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app_ref x(M.mk_const(symbol("x"), R), M);
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app_ref y(M.mk_const(symbol("y"), R), M);
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app_ref z(M.mk_const(symbol("z"), R), M);
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expr_ref p1(A.mk_le(A.mk_add(A.mk_mul(x,x,y), y), one), M);
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expr_ref p2(A.mk_le(A.mk_add(A.mk_mul(x,x,y), z), one), M);
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enable_trace("nlarith");
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nlarith::util u(M);
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nlarith::branch_conditions bc(M);
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expr_ref_vector preds(M), branches(M);
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vector<expr_ref_vector> substs;
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expr* lits[2] = { p1.get(), p2.get() };
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if (!u.create_branches(x.get(), 2, lits, bc)) {
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std::cout << "Failed to create branches\n";
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return;
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}
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for (unsigned i = 0; i < preds.size(); ++i) {
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std::cout << "Pred: " << mk_pp(preds[i].get(), M) << "\n";
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}
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for (unsigned i = 0; i < branches.size(); ++i) {
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std::cout << "Branch:\n" << mk_pp(branches[i].get(), M) << "\n";
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for (unsigned j = 0; j < substs[i].size(); ++j) {
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std::cout << mk_pp(preds[j].get(), M) << " |-> "
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<< mk_pp(substs[i][j].get(), M) << "\n";
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}
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}
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}
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