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fix #3023 again
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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parent
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@ -27,6 +27,7 @@ Revision History:
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#include "ast/arith_decl_plugin.h"
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#include "ast/expr_substitution.h"
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#include "ast/ast_smt2_pp.h"
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#include "ast/ast_pp.h"
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class fix_dl_var_tactic : public tactic {
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@ -53,10 +54,6 @@ class fix_dl_var_tactic : public tactic {
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sort * s = m.get_sort(n);
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return s->get_family_id() == m_util.get_family_id();
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}
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// Return true if n is uninterpreted with respect to arithmetic.
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bool is_uninterp(expr * n) {
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return is_app(n) && to_app(n)->get_family_id() != m_util.get_family_id();
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}
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// Remark: we say an expression is nested, if it occurs inside the boolean structure of the formula.
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// That is, the expression is not part of an unit clause comprising of a single inequality/equality.
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@ -82,9 +79,11 @@ class fix_dl_var_tactic : public tactic {
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}
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void process_app(app * t) {
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unsigned num = t->get_num_args();
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for (unsigned i = 0; i < num; i++)
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visit(t->get_arg(i), false);
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if (!is_uninterp(t) && !is_arith(t)) {
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throw_failed(t);
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}
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for (expr* arg : *t)
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visit(arg, false);
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}
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void process_arith_atom(expr * lhs, expr * rhs, bool nested) {
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@ -124,9 +123,10 @@ class fix_dl_var_tactic : public tactic {
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void process_eq(app * t, bool nested) {
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if (!is_arith(t->get_arg(0))) {
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process_app(t);
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return;
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}
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process_arith_atom(t->get_arg(0), t->get_arg(1), nested);
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else {
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process_arith_atom(t->get_arg(0), t->get_arg(1), nested);
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}
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}
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void process_arith(app * t, bool nested) {
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@ -180,12 +180,10 @@ class fix_dl_var_tactic : public tactic {
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app * most_occs(obj_map<app, unsigned> & occs, unsigned & best) {
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app * r = nullptr;
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best = 0;
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obj_map<app, unsigned>::iterator it = occs.begin();
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obj_map<app, unsigned>::iterator end = occs.end();
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for (; it != end; ++it) {
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if (it->m_value > best) {
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best = it->m_value;
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r = it->m_key;
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for (auto const& kv : occs) {
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if (kv.m_value > best) {
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best = kv.m_value;
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r = kv.m_key;
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}
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}
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return r;
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@ -201,7 +199,7 @@ class fix_dl_var_tactic : public tactic {
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app * r1, * r2;
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r1 = most_occs(m_non_nested_occs, best1);
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r2 = most_occs(m_occs, best2);
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TRACE("fix_dl_var_choice",
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TRACE("fix_dl_var",
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if (r1) {
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tout << "r1 occs: " << best1 << "\n";
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tout << mk_ismt2_pp(r1, m) << "\n";
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@ -254,11 +252,11 @@ class fix_dl_var_tactic : public tactic {
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tactic_report report("fix-dl-var", *g);
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bool produce_proofs = g->proofs_enabled();
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m_produce_models = g->models_enabled();
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TRACE("fix_dl_var", g->display(tout););
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app * var = is_target(u)(*g);
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if (var != nullptr) {
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IF_VERBOSE(TACTIC_VERBOSITY_LVL, verbose_stream() << "(fixing-at-zero " << var->get_decl()->get_name() << ")\n";);
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tactic_report report("fix-dl-var", *g);
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expr_substitution subst(m);
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app * zero = u.mk_numeral(rational(0), u.is_int(var));
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