cprover
single_loop_incremental_symex_checker.cpp
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1 /*******************************************************************\
2 
3 Module: Goto Checker using Multi-Path Symbolic Execution
4  with Incremental Unwinding of a specified Loop
5 
6 Author: Daniel Kroening, Peter Schrammel
7 
8 \*******************************************************************/
9 
13 
15 
16 #include <chrono>
17 
18 #include <goto-symex/slice.h>
19 
20 #include "bmc_util.h"
22 
24  const optionst &options,
25  ui_message_handlert &ui_message_handler,
26  abstract_goto_modelt &goto_model)
27  : incremental_goto_checkert(options, ui_message_handler),
28  goto_model(goto_model),
29  ns(goto_model.get_symbol_table(), symex_symbol_table),
30  equation(ui_message_handler),
31  symex(
32  ui_message_handler,
33  goto_model.get_symbol_table(),
34  equation,
35  options,
36  path_storage,
37  guard_manager),
38  property_decider(options, ui_message_handler, equation, ns)
39 {
41 
42  // Freeze all symbols if we are using a prop_conv_solvert
43  prop_conv_solvert *prop_conv_solver = dynamic_cast<prop_conv_solvert *>(
45  if(prop_conv_solver != nullptr)
46  prop_conv_solver->set_all_frozen();
47 }
48 
50 operator()(propertiest &properties)
51 {
52  resultt result(resultt::progresst::DONE);
53 
54  std::chrono::duration<double> solver_runtime(0);
55 
56  // we haven't got an equation yet
58  {
61 
62  // This might add new properties such as unwinding assertions, for instance.
64  properties, result.updated_properties, equation);
65 
67  }
68 
69  while(has_properties_to_check(properties))
70  {
71  // There are NOT_CHECKED or UNKNOWN properties.
72 
73  if(count_properties(properties, property_statust::UNKNOWN) > 0)
74  {
75  // We have UNKNOWN properties, i.e. properties that we can check
76  // on the current equation.
77 
78  log.status()
79  << "Passing problem to "
81  << messaget::eom;
82 
83  const auto solver_start = std::chrono::steady_clock::now();
84 
86  {
88 
89  log.status() << "converting SSA" << messaget::eom;
92 
94  properties);
95 
96  // We convert the assertions in a new context.
101 
103  }
104 
106  [&properties](const irep_idt &property_id) {
107  return is_property_to_check(properties.at(property_id).status);
108  });
109 
110  log.status()
111  << "Running "
113  << messaget::eom;
114 
116 
118  properties, result.updated_properties, dec_result, false);
119 
120  const auto solver_stop = std::chrono::steady_clock::now();
121  solver_runtime +=
122  std::chrono::duration<double>(solver_stop - solver_start);
123  log.status() << "Runtime decision procedure: " << solver_runtime.count()
124  << "s" << messaget::eom;
125 
126  result.progress =
128  ? resultt::progresst::FOUND_FAIL
129  : resultt::progresst::DONE;
130 
131  // We've got a trace to report.
132  if(result.progress == resultt::progresst::FOUND_FAIL)
133  break;
134 
135  // Nothing else to do with the current set of assertions.
136  // Let's pop them.
138  }
139 
140  // Now we are finally done.
142  {
143  // For now, we assume that UNKNOWN properties are PASS.
145  properties, result.updated_properties);
146 
147  // For now, we assume that NOT_REACHED properties are PASS.
149  properties, result.updated_properties);
150 
151  break;
152  }
153 
154  // We continue symbolic execution
158 
159  // This might add new properties such as unwinding assertions, for instance.
161  properties, result.updated_properties, equation);
162 
164  }
165 
166  return result;
167 }
168 
170 {
171  goto_tracet goto_trace;
173  equation,
174  equation.SSA_steps.end(),
176  ns,
177  goto_trace);
178 
179  return goto_trace;
180 }
181 
183 {
184  if(options.get_bool_option("beautify"))
185  {
186  // NOLINTNEXTLINE(whitespace/braces)
189  equation);
190  }
191 
192  goto_tracet goto_trace;
195 
196  return goto_trace;
197 }
198 
200  const irep_idt &property_id) const
201 {
202  goto_tracet goto_trace;
204  equation,
207  ns,
208  goto_trace);
209 
210  return goto_trace;
211 }
212 
214 {
215  return ns;
216 }
217 
219 {
221 }
222 
224  const goto_tracet &error_trace)
225 {
226  output_graphml(error_trace, ns, options);
227 }
dstringt
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
Definition: dstring.h:37
single_loop_incremental_symex_checkert::operator()
resultt operator()(propertiest &) override
Check whether the given properties with status NOT_CHECKED, UNKNOWN or properties newly discovered by...
Definition: single_loop_incremental_symex_checker.cpp:50
propertiest
std::unordered_map< irep_idt, property_infot > propertiest
A map of property IDs to property infos.
Definition: properties.h:75
single_loop_incremental_symex_checkert::symex_symbol_table
symbol_tablet symex_symbol_table
Definition: single_loop_incremental_symex_checker.h:53
update_status_of_unknown_properties
void update_status_of_unknown_properties(propertiest &properties, std::unordered_set< irep_idt > &updated_properties)
Sets the property status of UNKNOWN properties to PASS.
Definition: bmc_util.cpp:290
postprocess_equation
void postprocess_equation(symex_bmct &symex, symex_target_equationt &equation, const optionst &options, const namespacet &ns, ui_message_handlert &ui_message_handler)
Post process the equation.
Definition: bmc_util.cpp:322
build_goto_trace
void build_goto_trace(const symex_target_equationt &target, ssa_step_predicatet is_last_step_to_keep, const decision_proceduret &decision_procedure, const namespacet &ns, goto_tracet &goto_trace)
Build a trace by going through the steps of target and stopping after the step matching a given condi...
Definition: build_goto_trace.cpp:204
output_graphml
void output_graphml(const goto_tracet &goto_trace, const namespacet &ns, const optionst &options)
outputs an error witness in graphml format
Definition: bmc_util.cpp:107
ui_message_handlert
Definition: ui_message.h:20
incremental_goto_checkert::resultt
Definition: incremental_goto_checker.h:41
optionst
Definition: options.h:23
incremental_goto_checkert::options
const optionst & options
Definition: incremental_goto_checker.h:83
stack_decision_proceduret::push
virtual void push(const std::vector< exprt > &assumptions)=0
Pushes a new context on the stack that consists of the given (possibly empty vector of) assumptions.
messaget::status
mstreamt & status() const
Definition: message.h:400
single_loop_incremental_symex_checkert::output_error_witness
void output_error_witness(const goto_tracet &) override
Definition: single_loop_incremental_symex_checker.cpp:223
update_status_of_not_checked_properties
void update_status_of_not_checked_properties(propertiest &properties, std::unordered_set< irep_idt > &updated_properties)
Sets the property status of NOT_CHECKED properties to PASS.
Definition: bmc_util.cpp:274
counterexample_beautificationt
Definition: counterexample_beautification.h:22
incremental_goto_checkert::log
messaget log
Definition: incremental_goto_checker.h:85
single_loop_incremental_symex_checkert::current_equation_converted
bool current_equation_converted
Definition: single_loop_incremental_symex_checker.h:61
messaget::eom
static eomt eom
Definition: message.h:283
goto_symex_property_decidert::solve
decision_proceduret::resultt solve()
Calls solve() on the solver instance.
Definition: goto_symex_property_decider.cpp:102
single_loop_incremental_symex_checkert::build_full_trace
goto_tracet build_full_trace() const override
Builds and returns the complete trace.
Definition: single_loop_incremental_symex_checker.cpp:169
decision_proceduret::resultt::D_SATISFIABLE
@ D_SATISFIABLE
namespacet
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition: namespace.h:92
single_loop_incremental_symex_checkert::ns
namespacet ns
Definition: single_loop_incremental_symex_checker.h:54
bmc_util.h
single_loop_incremental_symex_checkert::initial_equation_generated
bool initial_equation_generated
Definition: single_loop_incremental_symex_checker.h:59
update_properties_status_from_symex_target_equation
void update_properties_status_from_symex_target_equation(propertiest &properties, std::unordered_set< irep_idt > &updated_properties, const symex_target_equationt &equation)
Sets property status to PASS for properties whose conditions are constant true in the equation.
Definition: bmc_util.cpp:238
single_loop_incremental_symex_checkert::output_proof
void output_proof() override
Definition: single_loop_incremental_symex_checker.cpp:218
has_properties_to_check
bool has_properties_to_check(const propertiest &properties)
Return true if there as a property with NOT_CHECKED or UNKNOWN status.
Definition: properties.cpp:174
goto_symex_property_decidert::convert_goals
void convert_goals()
Convert the instances of a property into a goal variable.
Definition: goto_symex_property_decider.cpp:72
single_loop_incremental_symex_checkert::equation
symex_target_equationt equation
Definition: single_loop_incremental_symex_checker.h:55
single_loop_incremental_symex_checkert::build_trace
goto_tracet build_trace(const irep_idt &) const override
Builds and returns the trace for the FAILed property with the given property_id.
Definition: single_loop_incremental_symex_checker.cpp:199
single_loop_incremental_symex_checkert::symex
symex_bmc_incremental_one_loopt symex
Definition: single_loop_incremental_symex_checker.h:58
is_property_to_check
bool is_property_to_check(property_statust status)
Return true if the status is NOT_CHECKED or UNKNOWN.
Definition: properties.cpp:168
single_loop_incremental_symex_checkert::full_equation_generated
bool full_equation_generated
Definition: single_loop_incremental_symex_checker.h:60
revert_slice
void revert_slice(symex_target_equationt &equation)
Undo whatever has been done by slice
Definition: slice.cpp:264
goto_symex_property_decidert::get_decision_procedure
decision_proceduret & get_decision_procedure() const
Returns the solver instance.
Definition: goto_symex_property_decider.cpp:108
goto_symex_property_decidert::get_stack_decision_procedure
stack_decision_proceduret & get_stack_decision_procedure() const
Returns the solver instance.
Definition: goto_symex_property_decider.cpp:114
single_loop_incremental_symex_checkert::get_namespace
const namespacet & get_namespace() const override
Returns the namespace associated with the traces.
Definition: single_loop_incremental_symex_checker.cpp:213
prop_conv_solvert::set_all_frozen
void set_all_frozen()
Definition: prop_conv_solver.cpp:32
count_properties
std::size_t count_properties(const propertiest &properties, property_statust status)
Return the number of properties with given status.
Definition: properties.cpp:157
goto_symex_property_decidert::add_constraint_from_goals
void add_constraint_from_goals(std::function< bool(const irep_idt &property_id)> select_property)
Add disjunction of negated selected properties to the equation.
Definition: goto_symex_property_decider.cpp:83
decision_proceduret::resultt
resultt
Result of running the decision procedure.
Definition: decision_procedure.h:44
property_statust::UNKNOWN
@ UNKNOWN
The checker was unable to determine the status of the property.
goto_symex_property_decidert::update_properties_goals_from_symex_target_equation
void update_properties_goals_from_symex_target_equation(propertiest &properties)
Get the conditions for the properties from the equation and collect all 'instances' of the properties...
Definition: goto_symex_property_decider.cpp:44
symex_target_equationt::convert_assertions
void convert_assertions(decision_proceduret &decision_procedure, bool optimized_for_single_assertions=true)
Converts assertions: build a disjunction of negated assertions.
Definition: symex_target_equation.cpp:456
decision_proceduret::decision_procedure_text
virtual std::string decision_procedure_text() const =0
Return a textual description of the decision procedure.
ssa_step_matches_failing_property
ssa_step_predicatet ssa_step_matches_failing_property(const irep_idt &property_id)
Returns a function that checks whether an SSA step is an assertion with property_id.
Definition: bmc_util.cpp:55
incremental_goto_checkert
An implementation of incremental_goto_checkert provides functionality for checking a set of propertie...
Definition: incremental_goto_checker.h:34
setup_symex
void setup_symex(symex_bmct &symex, const namespacet &ns, const optionst &options, ui_message_handlert &ui_message_handler)
Definition: bmc_util.cpp:179
goto_symex_property_decidert::update_properties_status_from_goals
void update_properties_status_from_goals(propertiest &properties, std::unordered_set< irep_idt > &updated_properties, decision_proceduret::resultt dec_result, bool set_pass=true) const
Update the property status from the truth value of the goal variable.
Definition: goto_symex_property_decider.cpp:124
symex_target_equationt::SSA_steps
SSA_stepst SSA_steps
Definition: symex_target_equation.h:255
optionst::get_bool_option
bool get_bool_option(const std::string &option) const
Definition: options.cpp:44
single_loop_incremental_symex_checkert::build_shortest_trace
goto_tracet build_shortest_trace() const override
Builds and returns the trace up to the first failed property.
Definition: single_loop_incremental_symex_checker.cpp:182
single_loop_incremental_symex_checkert::goto_model
abstract_goto_modelt & goto_model
Definition: single_loop_incremental_symex_checker.h:52
goto_symext::get_goto_function
static get_goto_functiont get_goto_function(abstract_goto_modelt &goto_model)
Return a function to get/load a goto function from the given goto model Create a default delegate to ...
Definition: symex_main.cpp:491
symex_target_equationt::convert_without_assertions
void convert_without_assertions(decision_proceduret &decision_procedure)
Interface method to initiate the conversion into a decision procedure format.
Definition: symex_target_equation.cpp:321
symex_bmc_incremental_one_loopt::resume
bool resume(const get_goto_functiont &get_goto_function)
Return true if symex can be resumed.
Definition: symex_bmc_incremental_one_loop.cpp:125
goto_tracet
Trace of a GOTO program.
Definition: goto_trace.h:171
boolbvt
Definition: boolbv.h:35
counterexample_beautification.h
incremental_goto_checkert::resultt::progress
progresst progress
Definition: incremental_goto_checker.h:52
stack_decision_proceduret::pop
virtual void pop()=0
Pop whatever is on top of the stack.
incremental_goto_checkert::resultt::updated_properties
std::unordered_set< irep_idt > updated_properties
Changed properties since the last call to incremental_goto_checkert::operator()
Definition: incremental_goto_checker.h:59
abstract_goto_modelt
Abstract interface to eager or lazy GOTO models.
Definition: abstract_goto_model.h:21
single_loop_incremental_symex_checker.h
incremental_goto_checkert::ui_message_handler
ui_message_handlert & ui_message_handler
Definition: incremental_goto_checker.h:84
symex_bmc_incremental_one_loopt::from_entry_point_of
bool from_entry_point_of(const get_goto_functiont &get_goto_function, symbol_tablet &new_symbol_table)
Return true if symex can be resumed.
Definition: symex_bmc_incremental_one_loop.cpp:114
slice.h
single_loop_incremental_symex_checkert::property_decider
goto_symex_property_decidert property_decider
Definition: single_loop_incremental_symex_checker.h:62
prop_conv_solvert
Definition: prop_conv_solver.h:30
single_loop_incremental_symex_checkert::single_loop_incremental_symex_checkert
single_loop_incremental_symex_checkert(const optionst &options, ui_message_handlert &ui_message_handler, abstract_goto_modelt &goto_model)
Definition: single_loop_incremental_symex_checker.cpp:23