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https://github.com/Z3Prover/z3
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@ -47,7 +47,6 @@ def_module_params(module_name='smt',
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('induction', BOOL, False, 'enable generation of induction lemmas'),
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('bv.reflect', BOOL, True, 'create enode for every bit-vector term'),
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('bv.enable_int2bv', BOOL, True, 'enable support for int2bv and bv2int operators'),
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('bv.eq_axioms', BOOL, True, 'add dynamic equality axioms'),
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('bv.watch_diseq', BOOL, False, 'use watch lists instead of eager axioms for bit-vectors'),
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('bv.delay', BOOL, True, 'delay internalize expensive bit-vector operations'),
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('arith.random_initial_value', BOOL, False, 'use random initial values in the simplex-based procedure for linear arithmetic'),
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@ -26,7 +26,6 @@ void theory_bv_params::updt_params(params_ref const & _p) {
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m_hi_div0 = rp.hi_div0();
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m_bv_reflect = p.bv_reflect();
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m_bv_enable_int2bv2int = p.bv_enable_int2bv();
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m_bv_eq_axioms = p.bv_eq_axioms();
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m_bv_delay = p.bv_delay();
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}
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@ -38,7 +37,6 @@ void theory_bv_params::display(std::ostream & out) const {
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DISPLAY_PARAM(m_bv_reflect);
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DISPLAY_PARAM(m_bv_lazy_le);
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DISPLAY_PARAM(m_bv_cc);
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DISPLAY_PARAM(m_bv_eq_axioms);
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DISPLAY_PARAM(m_bv_blast_max_size);
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DISPLAY_PARAM(m_bv_enable_int2bv2int);
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DISPLAY_PARAM(m_bv_delay);
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@ -224,8 +224,6 @@ namespace smt {
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};
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void theory_bv::add_new_diseq_axiom(theory_var v1, theory_var v2, unsigned idx) {
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if (!params().m_bv_eq_axioms)
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return;
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m_prop_diseqs.push_back(bv_diseq(v1, v2, idx));
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ctx.push_trail(push_back_vector<svector<bv_diseq>>(m_prop_diseqs));
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}
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@ -432,8 +430,6 @@ namespace smt {
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};
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void theory_bv::add_fixed_eq(theory_var v1, theory_var v2) {
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if (!params().m_bv_eq_axioms)
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return;
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if (v1 > v2) {
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std::swap(v1, v2);
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@ -1152,8 +1148,6 @@ namespace smt {
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}
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void theory_bv::expand_diseq(theory_var v1, theory_var v2) {
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if (!params().m_bv_eq_axioms)
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return;
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SASSERT(get_bv_size(v1) == get_bv_size(v2));
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if (v1 > v2) {
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@ -1320,30 +1314,29 @@ namespace smt {
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}
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else {
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ctx.assign(consequent, mk_bit_eq_justification(v1, v2, consequent, antecedent));
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if (params().m_bv_eq_axioms) {
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literal_vector lits;
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lits.push_back(~consequent);
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lits.push_back(antecedent);
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literal eq = mk_eq(get_expr(v1), get_expr(v2), false);
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lits.push_back(~eq);
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//
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// Issue #3035:
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// merge_eh invokes assign_bit, which updates the propagation queue and includes the
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// theory axiom for the propagated equality. When relevancy is non-zero, propagation may get
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// lost on backtracking because the propagation queue is reset on conflicts.
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// An alternative approach is to ensure the propagation queue is chronological with
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// backtracking scopes (ie., it doesn't get reset, but shrunk to a previous level, and similar
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// with a qhead indicator.
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//
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ctx.mark_as_relevant(lits[0]);
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ctx.mark_as_relevant(lits[1]);
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ctx.mark_as_relevant(lits[2]);
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{
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scoped_trace_stream _sts(*this, lits);
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ctx.mk_th_axiom(get_id(), lits.size(), lits.data());
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}
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literal_vector lits;
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lits.push_back(~consequent);
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lits.push_back(antecedent);
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literal eq = mk_eq(get_expr(v1), get_expr(v2), false);
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lits.push_back(~eq);
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//
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// Issue #3035:
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// merge_eh invokes assign_bit, which updates the propagation queue and includes the
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// theory axiom for the propagated equality. When relevancy is non-zero, propagation may get
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// lost on backtracking because the propagation queue is reset on conflicts.
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// An alternative approach is to ensure the propagation queue is chronological with
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// backtracking scopes (ie., it doesn't get reset, but shrunk to a previous level, and similar
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// with a qhead indicator.
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//
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ctx.mark_as_relevant(lits[0]);
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ctx.mark_as_relevant(lits[1]);
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ctx.mark_as_relevant(lits[2]);
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{
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scoped_trace_stream _sts(*this, lits);
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ctx.mk_th_axiom(get_id(), lits.size(), lits.data());
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}
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if (m_wpos[v2] == idx)
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find_wpos(v2);
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// REMARK: bit_eq_justification is marked as a theory_bv justification.
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