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Bugfix for arith_rewriter single operand division

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This commit is contained in:
Zephyr Pellerin 2016-03-04 18:26:00 -08:00
parent 40c5152075
commit b13db1e82e
1 changed files with 5 additions and 3 deletions
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8
src/ast/rewriter/arith_rewriter.cpp
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@ -61,8 +61,10 @@ br_status arith_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * c
case OP_ADD: st = mk_add_core(num_args, args, result); break;
case OP_MUL: st = mk_mul_core(num_args, args, result); break;
case OP_SUB: st = mk_sub(num_args, args, result); break;
case OP_DIV: SASSERT(num_args == 2); st = mk_div_core(args[0], args[1], result); break;
case OP_IDIV: SASSERT(num_args == 2); st = mk_idiv_core(args[0], args[1], result); break;
case OP_DIV: if (num_args == 1) { result = args[0]; st = BR_DONE; break; }
SASSERT(num_args == 2); st = mk_div_core(args[0], args[1], result); break;
case OP_IDIV: if (num_args == 1) { result = args[0]; st = BR_DONE; break; }
SASSERT(num_args == 2); st = mk_idiv_core(args[0], args[1], result); break;
case OP_MOD: SASSERT(num_args == 2); st = mk_mod_core(args[0], args[1], result); break;
case OP_REM: SASSERT(num_args == 2); st = mk_rem_core(args[0], args[1], result); break;
case OP_UMINUS: SASSERT(num_args == 1); st = mk_uminus(args[0], result); break;
@ -292,7 +294,7 @@ expr * arith_rewriter::reduce_power(expr * arg, bool is_eq) {
for (unsigned i = 0; i < sz; i++) {
expr * arg = args[i];
expr * arg0, *arg1;
if (m_util.is_power(arg, arg0, arg1) && m_util.is_numeral(arg1, k) && k.is_int() &&
if (m_util.is_power(arg, arg0, arg1) && m_util.is_numeral(arg1, k) && k.is_int() &&
((is_eq && k > rational(1)) || (!is_eq && k > rational(2)))) {
if (is_eq || !k.is_even()) {
new_args.push_back(arg0);