./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5adb63485f34d5cafa0d99a2c73701114544138d3e69ca15b00fc732949a8202 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:38,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:38,299 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-19 07:40:38,308 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:38,309 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:38,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:38,351 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:38,352 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:38,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:38,358 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:38,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:38,360 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:38,361 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:38,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:38,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:38,364 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:38,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:38,365 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:38,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:38,366 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:38,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:38,367 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:38,367 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 07:40:38,369 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:40:38,370 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:38,370 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:38,371 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:38,372 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:38,372 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:38,373 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:38,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:38,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:38,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:38,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:38,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:38,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:38,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:38,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:38,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:38,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:38,377 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:38,377 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5adb63485f34d5cafa0d99a2c73701114544138d3e69ca15b00fc732949a8202 [2023-11-19 07:40:38,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:38,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:38,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:38,837 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:38,838 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:38,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-3.i [2023-11-19 07:40:42,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:42,493 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:42,493 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/sv-benchmarks/c/pthread-race-challenges/thread-join-counter-inner-race-3.i [2023-11-19 07:40:42,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/data/a244d51b8/6086a2f65de64ab7a3b1c551d0d4ec7b/FLAG4fad96572 [2023-11-19 07:40:42,526 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/data/a244d51b8/6086a2f65de64ab7a3b1c551d0d4ec7b [2023-11-19 07:40:42,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:42,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:42,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:42,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:42,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:42,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:42" (1/1) ... [2023-11-19 07:40:42,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1ce899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42, skipping insertion in model container [2023-11-19 07:40:42,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:42" (1/1) ... [2023-11-19 07:40:42,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:43,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:43,167 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:43,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:43,315 WARN L675 CHandler]: The function pthread_detach is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:40:43,324 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:43,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43 WrapperNode [2023-11-19 07:40:43,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:43,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:43,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:43,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:43,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,432 INFO L138 Inliner]: procedures = 159, calls = 48, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2023-11-19 07:40:43,432 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:43,433 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:43,433 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:43,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:43,446 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,500 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,503 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,505 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:43,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:43,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:43,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:43,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (1/1) ... [2023-11-19 07:40:43,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:43,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:43,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caa55a0b-2d8a-45c8-83e3-d832675987b4/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:43,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:40:43,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:43,621 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:40:43,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:43,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:43,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure pthread_detach [2023-11-19 07:40:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-11-19 07:40:43,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-11-19 07:40:43,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:43,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:43,625 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:40:43,806 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:43,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:44,173 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:44,191 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:44,207 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:40:44,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:44 BoogieIcfgContainer [2023-11-19 07:40:44,215 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:44,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:44,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:44,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:44,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:42" (1/3) ... [2023-11-19 07:40:44,228 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8843ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:44, skipping insertion in model container [2023-11-19 07:40:44,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:43" (2/3) ... [2023-11-19 07:40:44,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8843ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:44, skipping insertion in model container [2023-11-19 07:40:44,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:44" (3/3) ... [2023-11-19 07:40:44,231 INFO L112 eAbstractionObserver]: Analyzing ICFG thread-join-counter-inner-race-3.i [2023-11-19 07:40:44,243 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:40:44,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:44,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-19 07:40:44,258 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:44,424 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:44,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 176 transitions, 356 flow [2023-11-19 07:40:44,639 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-19 07:40:44,639 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:44,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 224 events. 13/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 447 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 121. Up to 4 conditions per place. [2023-11-19 07:40:44,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 176 transitions, 356 flow [2023-11-19 07:40:44,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 176 transitions, 356 flow [2023-11-19 07:40:44,671 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:44,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 176 transitions, 356 flow [2023-11-19 07:40:44,698 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 176 transitions, 356 flow [2023-11-19 07:40:44,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 176 transitions, 356 flow [2023-11-19 07:40:44,807 INFO L124 PetriNetUnfolderBase]: 13/224 cut-off events. [2023-11-19 07:40:44,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:44,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 224 events. 13/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 447 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 121. Up to 4 conditions per place. [2023-11-19 07:40:44,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 7370 [2023-11-19 07:40:51,539 INFO L134 LiptonReduction]: Checked pairs total: 39193 [2023-11-19 07:40:51,539 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-11-19 07:40:51,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:51,566 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@746a7ca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:51,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-19 07:40:51,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:51,571 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:51,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:51,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:51,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:51,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-11-19 07:40:51,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 18223580, now seen corresponding path program 1 times [2023-11-19 07:40:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290600871] [2023-11-19 07:40:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:51,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:51,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290600871] [2023-11-19 07:40:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290600871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:51,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:51,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363264847] [2023-11-19 07:40:51,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:51,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:52,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 291 [2023-11-19 07:40:52,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:52,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:52,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 291 [2023-11-19 07:40:52,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:52,406 INFO L124 PetriNetUnfolderBase]: 441/1250 cut-off events. [2023-11-19 07:40:52,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:52,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 1250 events. 441/1250 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 8069 event pairs, 107 based on Foata normal form. 25/1134 useless extension candidates. Maximal degree in co-relation 2069. Up to 515 conditions per place. [2023-11-19 07:40:52,426 INFO L140 encePairwiseOnDemand]: 275/291 looper letters, 58 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2023-11-19 07:40:52,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 320 flow [2023-11-19 07:40:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-11-19 07:40:52,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6254295532646048 [2023-11-19 07:40:52,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-11-19 07:40:52,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-11-19 07:40:52,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:52,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-11-19 07:40:52,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:52,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:52,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:52,474 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 144 flow. Second operand 3 states and 546 transitions. [2023-11-19 07:40:52,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 320 flow [2023-11-19 07:40:52,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:52,483 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 192 flow [2023-11-19 07:40:52,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-11-19 07:40:52,490 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-11-19 07:40:52,490 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 192 flow [2023-11-19 07:40:52,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:52,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:52,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:40:52,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:52,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 15 more)] === [2023-11-19 07:40:52,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:52,493 INFO L85 PathProgramCache]: Analyzing trace with hash 340297630, now seen corresponding path program 1 times [2023-11-19 07:40:52,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:52,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875911819] [2023-11-19 07:40:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:52,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:52,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:52,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:52,687 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2023-11-19 07:40:52,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (16 of 18 remaining) [2023-11-19 07:40:52,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (15 of 18 remaining) [2023-11-19 07:40:52,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (14 of 18 remaining) [2023-11-19 07:40:52,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (13 of 18 remaining) [2023-11-19 07:40:52,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (12 of 18 remaining) [2023-11-19 07:40:52,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (11 of 18 remaining) [2023-11-19 07:40:52,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (10 of 18 remaining) [2023-11-19 07:40:52,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (9 of 18 remaining) [2023-11-19 07:40:52,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (8 of 18 remaining) [2023-11-19 07:40:52,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (7 of 18 remaining) [2023-11-19 07:40:52,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (6 of 18 remaining) [2023-11-19 07:40:52,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (5 of 18 remaining) [2023-11-19 07:40:52,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (4 of 18 remaining) [2023-11-19 07:40:52,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (3 of 18 remaining) [2023-11-19 07:40:52,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (2 of 18 remaining) [2023-11-19 07:40:52,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (1 of 18 remaining) [2023-11-19 07:40:52,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (0 of 18 remaining) [2023-11-19 07:40:52,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:52,696 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:40:52,699 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:40:52,699 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:40:52,747 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:40:52,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 232 transitions, 474 flow [2023-11-19 07:40:52,838 INFO L124 PetriNetUnfolderBase]: 20/346 cut-off events. [2023-11-19 07:40:52,838 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:52,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 346 events. 20/346 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 875 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 225. Up to 6 conditions per place. [2023-11-19 07:40:52,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 232 transitions, 474 flow [2023-11-19 07:40:52,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 232 transitions, 474 flow [2023-11-19 07:40:52,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:52,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 232 transitions, 474 flow [2023-11-19 07:40:52,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 232 transitions, 474 flow [2023-11-19 07:40:52,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 232 transitions, 474 flow [2023-11-19 07:40:52,920 INFO L124 PetriNetUnfolderBase]: 20/346 cut-off events. [2023-11-19 07:40:52,921 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:52,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 346 events. 20/346 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 875 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 225. Up to 6 conditions per place. [2023-11-19 07:40:52,945 INFO L119 LiptonReduction]: Number of co-enabled transitions 20900 [2023-11-19 07:40:58,167 INFO L134 LiptonReduction]: Checked pairs total: 117057 [2023-11-19 07:40:58,167 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-11-19 07:40:58,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:58,172 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@746a7ca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:58,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-19 07:40:58,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:58,175 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:40:58,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:40:58,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:58,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:40:58,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:40:58,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 31089981, now seen corresponding path program 1 times [2023-11-19 07:40:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:58,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554259721] [2023-11-19 07:40:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:58,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:58,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554259721] [2023-11-19 07:40:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554259721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:58,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462353211] [2023-11-19 07:40:58,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:58,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:58,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:58,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 362 [2023-11-19 07:40:58,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:58,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:58,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 362 [2023-11-19 07:40:58,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:03,410 INFO L124 PetriNetUnfolderBase]: 18105/36413 cut-off events. [2023-11-19 07:41:03,411 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-19 07:41:03,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63894 conditions, 36413 events. 18105/36413 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 355852 event pairs, 5782 based on Foata normal form. 1045/33524 useless extension candidates. Maximal degree in co-relation 39517. Up to 14604 conditions per place. [2023-11-19 07:41:03,747 INFO L140 encePairwiseOnDemand]: 335/362 looper letters, 92 selfloop transitions, 16 changer transitions 0/155 dead transitions. [2023-11-19 07:41:03,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 155 transitions, 541 flow [2023-11-19 07:41:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-11-19 07:41:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6721915285451197 [2023-11-19 07:41:03,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-11-19 07:41:03,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-11-19 07:41:03,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:03,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-11-19 07:41:03,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,766 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 230 flow. Second operand 3 states and 730 transitions. [2023-11-19 07:41:03,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 155 transitions, 541 flow [2023-11-19 07:41:03,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 541 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:41:03,776 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 360 flow [2023-11-19 07:41:03,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2023-11-19 07:41:03,778 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2023-11-19 07:41:03,778 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 360 flow [2023-11-19 07:41:03,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:03,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:03,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:41:03,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash -206232321, now seen corresponding path program 1 times [2023-11-19 07:41:03,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:03,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512482465] [2023-11-19 07:41:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:03,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:03,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:03,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512482465] [2023-11-19 07:41:03,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512482465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:03,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:03,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352572713] [2023-11-19 07:41:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:03,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:03,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:03,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 362 [2023-11-19 07:41:03,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:03,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:03,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 362 [2023-11-19 07:41:03,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:07,969 INFO L124 PetriNetUnfolderBase]: 15316/32072 cut-off events. [2023-11-19 07:41:07,969 INFO L125 PetriNetUnfolderBase]: For 7599/8220 co-relation queries the response was YES. [2023-11-19 07:41:08,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62789 conditions, 32072 events. 15316/32072 cut-off events. For 7599/8220 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 326029 event pairs, 9727 based on Foata normal form. 79/28038 useless extension candidates. Maximal degree in co-relation 40313. Up to 20677 conditions per place. [2023-11-19 07:41:08,230 INFO L140 encePairwiseOnDemand]: 357/362 looper letters, 82 selfloop transitions, 4 changer transitions 0/157 dead transitions. [2023-11-19 07:41:08,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 157 transitions, 634 flow [2023-11-19 07:41:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2023-11-19 07:41:08,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648250460405156 [2023-11-19 07:41:08,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2023-11-19 07:41:08,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2023-11-19 07:41:08,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:08,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2023-11-19 07:41:08,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,242 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 360 flow. Second operand 3 states and 722 transitions. [2023-11-19 07:41:08,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 157 transitions, 634 flow [2023-11-19 07:41:08,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 157 transitions, 592 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:41:08,307 INFO L231 Difference]: Finished difference. Result has 111 places, 124 transitions, 354 flow [2023-11-19 07:41:08,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=111, PETRI_TRANSITIONS=124} [2023-11-19 07:41:08,310 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, 4 predicate places. [2023-11-19 07:41:08,311 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 124 transitions, 354 flow [2023-11-19 07:41:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:08,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:08,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:41:08,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:41:08,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1462157881, now seen corresponding path program 1 times [2023-11-19 07:41:08,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:08,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537898055] [2023-11-19 07:41:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:08,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:08,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537898055] [2023-11-19 07:41:08,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537898055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:08,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:08,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:08,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861744610] [2023-11-19 07:41:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:08,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 362 [2023-11-19 07:41:08,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 124 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:08,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:08,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 362 [2023-11-19 07:41:08,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:11,915 INFO L124 PetriNetUnfolderBase]: 17711/36126 cut-off events. [2023-11-19 07:41:11,915 INFO L125 PetriNetUnfolderBase]: For 6081/7902 co-relation queries the response was YES. [2023-11-19 07:41:11,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72765 conditions, 36126 events. 17711/36126 cut-off events. For 6081/7902 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 360673 event pairs, 9546 based on Foata normal form. 651/32120 useless extension candidates. Maximal degree in co-relation 35805. Up to 23150 conditions per place. [2023-11-19 07:41:12,160 INFO L140 encePairwiseOnDemand]: 352/362 looper letters, 80 selfloop transitions, 16 changer transitions 0/162 dead transitions. [2023-11-19 07:41:12,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 162 transitions, 656 flow [2023-11-19 07:41:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:41:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2023-11-19 07:41:12,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6528545119705341 [2023-11-19 07:41:12,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2023-11-19 07:41:12,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2023-11-19 07:41:12,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:12,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2023-11-19 07:41:12,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,171 INFO L175 Difference]: Start difference. First operand has 111 places, 124 transitions, 354 flow. Second operand 3 states and 709 transitions. [2023-11-19 07:41:12,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 162 transitions, 656 flow [2023-11-19 07:41:12,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 162 transitions, 651 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:41:12,456 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 496 flow [2023-11-19 07:41:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=496, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2023-11-19 07:41:12,461 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2023-11-19 07:41:12,462 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 496 flow [2023-11-19 07:41:12,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:12,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:41:12,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:41:12,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2023-11-19 07:41:12,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 312368808, now seen corresponding path program 1 times [2023-11-19 07:41:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652424698] [2023-11-19 07:41:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:12,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:41:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:41:12,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:41:12,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:41:12,564 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2023-11-19 07:41:12,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (22 of 24 remaining) [2023-11-19 07:41:12,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (21 of 24 remaining) [2023-11-19 07:41:12,565 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (20 of 24 remaining) [2023-11-19 07:41:12,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (19 of 24 remaining) [2023-11-19 07:41:12,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (18 of 24 remaining) [2023-11-19 07:41:12,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (17 of 24 remaining) [2023-11-19 07:41:12,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (16 of 24 remaining) [2023-11-19 07:41:12,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (15 of 24 remaining) [2023-11-19 07:41:12,568 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (14 of 24 remaining) [2023-11-19 07:41:12,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (13 of 24 remaining) [2023-11-19 07:41:12,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (12 of 24 remaining) [2023-11-19 07:41:12,569 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (11 of 24 remaining) [2023-11-19 07:41:12,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (10 of 24 remaining) [2023-11-19 07:41:12,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (9 of 24 remaining) [2023-11-19 07:41:12,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (8 of 24 remaining) [2023-11-19 07:41:12,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (7 of 24 remaining) [2023-11-19 07:41:12,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (6 of 24 remaining) [2023-11-19 07:41:12,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONDATA_RACE (5 of 24 remaining) [2023-11-19 07:41:12,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1ASSERT_VIOLATIONDATA_RACE (4 of 24 remaining) [2023-11-19 07:41:12,571 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2ASSERT_VIOLATIONDATA_RACE (3 of 24 remaining) [2023-11-19 07:41:12,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4ASSERT_VIOLATIONDATA_RACE (2 of 24 remaining) [2023-11-19 07:41:12,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5ASSERT_VIOLATIONDATA_RACE (1 of 24 remaining) [2023-11-19 07:41:12,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3ASSERT_VIOLATIONDATA_RACE (0 of 24 remaining) [2023-11-19 07:41:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:41:12,575 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 07:41:12,576 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:41:12,576 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:41:12,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:41:12,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 288 transitions, 594 flow [2023-11-19 07:41:12,767 INFO L124 PetriNetUnfolderBase]: 27/468 cut-off events. [2023-11-19 07:41:12,767 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:41:12,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 468 events. 27/468 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1306 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 350. Up to 8 conditions per place. [2023-11-19 07:41:12,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 288 transitions, 594 flow [2023-11-19 07:41:12,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 288 transitions, 594 flow [2023-11-19 07:41:12,779 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:41:12,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 288 transitions, 594 flow [2023-11-19 07:41:12,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 288 transitions, 594 flow [2023-11-19 07:41:12,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 288 transitions, 594 flow [2023-11-19 07:41:12,913 INFO L124 PetriNetUnfolderBase]: 27/468 cut-off events. [2023-11-19 07:41:12,914 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:41:12,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 468 events. 27/468 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1306 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 350. Up to 8 conditions per place. [2023-11-19 07:41:12,948 INFO L119 LiptonReduction]: Number of co-enabled transitions 40590 [2023-11-19 07:41:17,581 INFO L134 LiptonReduction]: Checked pairs total: 237864 [2023-11-19 07:41:17,581 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-19 07:41:17,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:17,584 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@746a7ca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:17,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-19 07:41:17,586 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:41:17,587 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-19 07:41:17,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:41:17,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:17,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:41:17,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 27 more)] === [2023-11-19 07:41:17,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash 46294845, now seen corresponding path program 1 times [2023-11-19 07:41:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525911821] [2023-11-19 07:41:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:17,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525911821] [2023-11-19 07:41:17,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525911821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:17,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:17,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625006896] [2023-11-19 07:41:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:17,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 438 [2023-11-19 07:41:17,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 147 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:17,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:17,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 438 [2023-11-19 07:41:17,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand