cprover
single_path_symex_checker.cpp
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1 /*******************************************************************\
2 
3 Module: Goto Checker using Single Path Symbolic Execution
4 
5 Author: Daniel Kroening, Peter Schrammel
6 
7 \*******************************************************************/
8 
11 
13 
14 #include "bmc_util.h"
16 #include "symex_bmc.h"
17 
19  const optionst &options,
20  ui_message_handlert &ui_message_handler,
21  abstract_goto_modelt &goto_model)
22  : single_path_symex_only_checkert(options, ui_message_handler, goto_model)
23 {
24 }
25 
27 operator()(propertiest &properties)
28 {
29  resultt result(resultt::progresst::DONE);
30 
31  // There might be more solutions from the previous equation.
33  {
35  result, properties, *property_decider, std::chrono::duration<double>(0));
36 
37  if(result.progress == resultt::progresst::FOUND_FAIL)
38  return result;
39  }
40 
41  if(!worklist->empty())
42  {
43  // We pop the item processed in the previous iteration.
44  worklist->pop();
45  }
46 
48  {
49  symex_initialized = true;
50 
52  }
53 
54  while(!has_finished_exploration(properties))
55  {
56  path_storaget::patht &path = worklist->peek();
57  const bool ready_to_decide = resume_path(path);
58 
59  if(ready_to_decide)
60  {
61  update_properties(properties, result.updated_properties, path.equation);
62 
63  property_decider = util_make_unique<goto_symex_property_decidert>(
65 
66  const auto solver_runtime =
68 
70  result, properties, *property_decider, solver_runtime);
71 
72  if(result.progress == resultt::progresst::FOUND_FAIL)
73  return result;
74  }
75 
76  worklist->pop();
77  }
78 
79  final_update_properties(properties, result.updated_properties);
80 
81  // Worklist is empty: we are done.
82  return result;
83 }
84 
86  const symex_bmct &symex,
87  const path_storaget::patht &)
88 {
89  return symex.get_remaining_vccs() > 0;
90 }
91 
92 std::chrono::duration<double>
94  propertiest &properties,
95  symex_target_equationt &equation,
96  goto_symex_property_decidert &property_decider)
97 {
98  std::chrono::duration<double> solver_runtime = ::prepare_property_decider(
99  properties, equation, property_decider, ui_message_handler);
100 
101  return solver_runtime;
102 }
103 
106  propertiest &properties,
107  goto_symex_property_decidert &property_decider,
108  std::chrono::duration<double> solver_runtime)
109 {
111  result,
112  properties,
115  solver_runtime,
116  false);
117 }
118 
120 {
121  goto_tracet goto_trace;
123  property_decider->get_equation(),
124  property_decider->get_equation().SSA_steps.end(),
125  property_decider->get_decision_procedure(),
126  ns,
127  goto_trace);
128 
129  return goto_trace;
130 }
131 
133 {
134  if(options.get_bool_option("beautify"))
135  {
136  // NOLINTNEXTLINE(whitespace/braces)
138  dynamic_cast<boolbvt &>(property_decider->get_stack_decision_procedure()),
139  property_decider->get_equation());
140  }
141 
142  goto_tracet goto_trace;
144  property_decider->get_equation(),
145  property_decider->get_decision_procedure(),
146  ns,
147  goto_trace);
148 
149  return goto_trace;
150 }
151 
154 {
155  goto_tracet goto_trace;
157  property_decider->get_equation(),
159  property_decider->get_decision_procedure(),
160  ns,
161  goto_trace);
162 
163  return goto_trace;
164 }
165 
167 {
168  return ns;
169 }
170 
172  const goto_tracet &goto_trace)
173 {
174  output_graphml(goto_trace, ns, options);
175 }
176 
178 {
179  // This is incorrect, but the best we can do at the moment.
180  const path_storaget::patht &resume = worklist->peek();
181  output_graphml(resume.equation, ns, options);
182 }
single_path_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_path_symex_checker.cpp:153
dstringt
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
Definition: dstring.h:37
propertiest
std::unordered_map< irep_idt, property_infot > propertiest
A map of property IDs to property infos.
Definition: properties.h:75
single_path_symex_only_checkert::ns
namespacet ns
Definition: single_path_symex_only_checker.h:37
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:89
single_path_symex_only_checkert::resume_path
virtual bool resume_path(path_storaget::patht &path)
Continues exploring the given path using goto-symex.
Definition: single_path_symex_only_checker.cpp:83
single_path_symex_checkert::symex_initialized
bool symex_initialized
Definition: single_path_symex_checker.h:50
counterexample_beautificationt
Definition: counterexample_beautification.h:22
single_path_symex_checkert::prepare_property_decider
virtual std::chrono::duration< double > prepare_property_decider(propertiest &properties, symex_target_equationt &equation, goto_symex_property_decidert &property_decider)
Prepare the property_decider for solving.
Definition: single_path_symex_checker.cpp:93
single_path_symex_checkert::is_ready_to_decide
bool is_ready_to_decide(const symex_bmct &, const path_storaget::patht &) override
Returns whether the given path produced by symex is ready to be checked.
Definition: single_path_symex_checker.cpp:85
namespacet
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition: namespace.h:92
bmc_util.h
Bounded Model Checking Utilities.
path_storaget::patht::equation
symex_target_equationt equation
Definition: path_storage.h:43
single_path_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_path_symex_checker.cpp:132
single_path_symex_only_checkert::final_update_properties
virtual void final_update_properties(propertiest &properties, std::unordered_set< irep_idt > &updated_properties)
Updates the properties after having finished exploration and adds their property IDs to updated_prope...
Definition: single_path_symex_only_checker.cpp:156
single_path_symex_checkert::run_property_decider
virtual void run_property_decider(incremental_goto_checkert::resultt &result, propertiest &properties, goto_symex_property_decidert &property_decider, std::chrono::duration< double > solver_runtime)
Run the property_decider, which calls the SAT solver, and set the status of checked properties accord...
Definition: single_path_symex_checker.cpp:104
single_path_symex_checkert::single_path_symex_checkert
single_path_symex_checkert(const optionst &options, ui_message_handlert &ui_message_handler, abstract_goto_modelt &goto_model)
Definition: single_path_symex_checker.cpp:18
single_path_symex_only_checkert::worklist
std::unique_ptr< path_storaget > worklist
Definition: single_path_symex_only_checker.h:39
single_path_symex_checker.h
Goto Checker using Single Path Symbolic Execution.
single_path_symex_checkert::output_error_witness
void output_error_witness(const goto_tracet &) override
Definition: single_path_symex_checker.cpp:171
single_path_symex_only_checkert::initialize_worklist
virtual void initialize_worklist()
Adds the initial goto-symex state as a path to the worklist.
Definition: single_path_symex_only_checker.cpp:58
single_path_symex_checkert::operator()
resultt operator()(propertiest &) override
Check whether the given properties with status NOT_CHECKED, UNKNOWN or properties newly discovered by...
Definition: single_path_symex_checker.cpp:27
path_storaget::patht
Information saved at a conditional goto to resume execution.
Definition: path_storage.h:42
single_path_symex_checkert::build_full_trace
goto_tracet build_full_trace() const override
Builds and returns the complete trace.
Definition: single_path_symex_checker.cpp:119
symex_target_equationt
Inheriting the interface of symex_targett this class represents the SSA form of the input program as ...
Definition: symex_target_equation.h:41
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
single_path_symex_checkert::output_proof
void output_proof() override
Definition: single_path_symex_checker.cpp:177
optionst::get_bool_option
bool get_bool_option(const std::string &option) const
Definition: options.cpp:44
goto_tracet
Trace of a GOTO program.
Definition: goto_trace.h:171
single_path_symex_only_checkert::has_finished_exploration
virtual bool has_finished_exploration(const propertiest &)
Returns whether we should stop exploring paths.
Definition: single_path_symex_only_checker.cpp:75
single_path_symex_checkert::get_namespace
const namespacet & get_namespace() const override
Returns the namespace associated with the traces.
Definition: single_path_symex_checker.cpp:166
boolbvt
Definition: boolbv.h:35
goto_symex_property_decidert
Provides management of goal variables that encode properties.
Definition: goto_symex_property_decider.h:24
counterexample_beautification.h
Counterexample Beautification.
incremental_goto_checkert::resultt::progress
progresst progress
Definition: incremental_goto_checker.h:52
single_path_symex_checkert::property_decider
std::unique_ptr< goto_symex_property_decidert > property_decider
Definition: single_path_symex_checker.h:51
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
single_path_symex_only_checkert
Uses goto-symex to generate a symex_target_equationt for each path.
Definition: single_path_symex_only_checker.h:23
abstract_goto_modelt
Abstract interface to eager or lazy GOTO models.
Definition: abstract_goto_model.h:21
symex_bmct
Definition: symex_bmc.h:26
incremental_goto_checkert::ui_message_handler
ui_message_handlert & ui_message_handler
Definition: incremental_goto_checker.h:90
symex_bmc.h
Bounded Model Checking for ANSI-C.
single_path_symex_only_checkert::update_properties
virtual void update_properties(propertiest &properties, std::unordered_set< irep_idt > &updated_properties, const symex_target_equationt &equation)
Updates the properties from the equation and adds their property IDs to updated_properties.
Definition: single_path_symex_only_checker.cpp:144
goto_symext::get_remaining_vccs
unsigned get_remaining_vccs() const
Definition: goto_symex.h:834