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/*******************************************************************\
Module: Unit tests for value_set_abstract_valuet compacting
Compacting occurs when the value_set get 'large', and takes two forms
non-destructive (eg, can we merge constants into an existing interval
with no loss of precision) and destructive (creating intervals from
the constants, or merging existing intervals).
Author: Jez Higgins, jez@jezuk.co.uk
\*******************************************************************/
#include <util/arith_tools.h>
#include <util/bitvector_types.h>
#include <util/namespace.h>
#include <util/symbol_table.h>
#include <analyses/variable-sensitivity/abstract_environment.h>
#include <analyses/variable-sensitivity/variable_sensitivity_object_factory.h>
// NOLINTNEXTLINE(whitespace/line_length)
#include <analyses/variable-sensitivity/interval_abstract_value.h> // IWYU pragma: keep
#include <analyses/variable-sensitivity/variable_sensitivity_test_helpers.h>
#include <testing-utils/use_catch.h>
SCENARIO(
"compacting value sets",
"[core][analysis][variable-sensitivity][value_set_abstract_object][compact]")
{
const typet type = signedbv_typet(32);
auto val0 = from_integer(0, type);
auto val1 = from_integer(1, type);
auto val2 = from_integer(2, type);
auto val3 = from_integer(3, type);
auto val4 = from_integer(4, type);
auto val5 = from_integer(5, type);
auto val6 = from_integer(6, type);
auto val7 = from_integer(7, type);
auto val8 = from_integer(8, type);
auto val9 = from_integer(9, type);
auto val10 = from_integer(10, type);
auto val11 = from_integer(11, type);
auto val12 = from_integer(12, type);
auto interval_5_10 = constant_interval_exprt(val5, val10);
auto interval_1_10 = constant_interval_exprt(val1, val10);
auto config = vsd_configt::constant_domain();
config.context_tracking.data_dependency_context = false;
config.context_tracking.last_write_context = false;
auto object_factory =
variable_sensitivity_object_factoryt::configured_with(config);
auto environment = abstract_environmentt{object_factory};
environment.make_top();
auto symbol_table = symbol_tablet{};
auto ns = namespacet{symbol_table};
GIVEN("compact values into existing interval")
{
WHEN("compacting { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, [5, 10]")
{
auto value_set = make_value_set(
{val1,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
interval_5_10},
environment,
ns);
THEN("{ 1, 2, 3, 4, [5, 10] }")
{
EXPECT(value_set, {val1, val2, val3, val4, interval_5_10});
}
}
WHEN("compacting { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, [1, 10]")
{
auto value_set = make_value_set(
{val1,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
interval_1_10},
environment,
ns);
THEN("{ [1, 10] }")
{
EXPECT(value_set, {interval_1_10});
}
}
WHEN("compacting { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, [5, 10]")
{
auto value_set = make_value_set(
{val1,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
val11,
val12,
interval_5_10},
environment,
ns);
THEN("{ 1, 2, 3, 4, 11, 12, [5, 10] }")
{
EXPECT(
value_set, {val1, val2, val3, val4, val11, val12, interval_5_10});
}
}
WHEN("compacting { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, [1, 10], [5, 10]")
{
auto value_set = make_value_set(
{val1,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
interval_1_10,
interval_5_10},
environment,
ns);
THEN("{ [1, 10] }")
{
EXPECT(value_set, {interval_1_10});
}
}
WHEN("compacting { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, [5, 10], [1, 10]")
{
auto value_set = make_value_set(
{val1,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
val11,
val12,
interval_5_10,
interval_1_10},
environment,
ns);
THEN("{ 11, 12, [1, 10] }")
{
EXPECT(value_set, {val11, val12, interval_1_10});
}
}
}
GIVEN("compact overlapping interval together")
{
auto interval_1_2 = constant_interval_exprt(val1, val2);
auto interval_2_3 = constant_interval_exprt(val2, val3);
auto interval_3_4 = constant_interval_exprt(val3, val4);
auto interval_4_5 = constant_interval_exprt(val4, val5);
auto interval_8_10 = constant_interval_exprt(val8, val10);
auto interval_9_12 = constant_interval_exprt(val9, val12);
auto val13 = from_integer(13, type);
auto val14 = from_integer(14, type);
auto val15 = from_integer(15, type);
WHEN(
"compacting { 0, [1, 2], [2, 3], [3, 4], [4, 5], 6, 7, [8, 10], [9, 12], "
"13, 14, 15 }")
{
auto value_set = make_value_set(
{val0,
interval_1_2,
interval_2_3,
interval_3_4,
interval_4_5,
val6,
val7,
interval_8_10,
interval_9_12,
val13,
val14,
val15},
environment,
ns);
THEN("{ 0, [1, 5], 6, 7, [9, 12], 13, 14, 15 }")
{
auto interval_1_5 = constant_interval_exprt(val1, val5);
auto interval_8_12 = constant_interval_exprt(val8, val12);
EXPECT(
value_set,
{val0, interval_1_5, val6, val7, interval_8_12, val13, val14, val15});
}
}
WHEN(
"compacting { [1, 2], [2, 3], [3, 4], [4, 5], [8, 10], [9, 12], 0, 1, 2, "
"3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }")
{
auto value_set = make_value_set(
{val0, val1, val2, val3, val4,
val5, val6, val7, val8, val9,
val10, val11, val12, val13, val14,
val15, interval_1_2, interval_2_3, interval_3_4, interval_4_5,
interval_8_10, interval_9_12},
environment,
ns);
THEN("{ 0, [1, 5], 6, 7, [9, 12], 13, 14, 15 }")
{
auto interval_1_5 = constant_interval_exprt(val1, val5);
auto interval_8_12 = constant_interval_exprt(val8, val12);
EXPECT(
value_set,
{val0, interval_1_5, val6, val7, interval_8_12, val13, val14, val15});
}
}
}
GIVEN("compact values into new intervals")
{
WHEN("compacting { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }")
{
auto value_set = make_value_set(
{val1,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
val11,
val12},
environment,
ns);
THEN("{ [1, 4], 5, 6, 7, 8, [9, 12] }")
{
auto interval_1_4 = constant_interval_exprt(val1, val4);
auto interval_9_12 = constant_interval_exprt(val9, val12);
EXPECT(
value_set, {val5, val6, val7, val8, interval_1_4, interval_9_12});
}
}
WHEN(
"compacting { -100, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 100 } - pathalogical "
"case with outliers")
{
auto val100minus = from_integer(-100, type);
auto val100 = from_integer(100, type);
auto value_set = make_value_set(
{val100minus,
val2,
val3,
val4,
val5,
val6,
val7,
val8,
val9,
val10,
val11,
val100},
environment,
ns);
THEN("{ [-100, 0], [1, 100] }")
{
auto interval_100minus_0 = constant_interval_exprt(val100minus, val0);
auto interval_1_100 = constant_interval_exprt(val1, val100);
EXPECT(value_set, {interval_100minus_0, interval_1_100});
}
}
}
}
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