./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX --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 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:07:49,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:07:49,945 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-11-08 16:07:49,954 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:07:49,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:07:50,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:07:50,011 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:07:50,011 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:07:50,012 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:07:50,013 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:07:50,014 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:07:50,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:07:50,016 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:07:50,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:07:50,020 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 16:07:50,020 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:07:50,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:07:50,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:07:50,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:07:50,026 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 16:07:50,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:07:50,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 16:07:50,032 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-11-08 16:07:50,032 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:07:50,032 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:07:50,033 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:07:50,033 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 16:07:50,033 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:07:50,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:07:50,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:07:50,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:07:50,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:07:50,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:07:50,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:07:50,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 16:07:50,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:07:50,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:07:50,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:07:50,041 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:07:50,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:07:50,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:07:50,043 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_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 [2024-11-08 16:07:50,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:07:50,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:07:50,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:07:50,476 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:07:50,477 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:07:50,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i Unable to find full path for "g++" [2024-11-08 16:07:53,220 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:07:53,697 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:07:53,698 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i [2024-11-08 16:07:53,729 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/data/60159e6b0/96f94856a9ea4b60983efc33fca85c68/FLAGaba2f5a37 [2024-11-08 16:07:53,818 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/data/60159e6b0/96f94856a9ea4b60983efc33fca85c68 [2024-11-08 16:07:53,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:07:53,824 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:07:53,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:07:53,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:07:53,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:07:53,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:07:53" (1/1) ... [2024-11-08 16:07:53,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1facba91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:53, skipping insertion in model container [2024-11-08 16:07:53,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:07:53" (1/1) ... [2024-11-08 16:07:53,940 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:07:55,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:07:55,139 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:07:55,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:07:55,528 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:07:55,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55 WrapperNode [2024-11-08 16:07:55,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:07:55,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:07:55,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:07:55,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:07:55,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:55,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,019 INFO L138 Inliner]: procedures = 396, calls = 203, calls flagged for inlining = 53, calls inlined = 218, statements flattened = 7601 [2024-11-08 16:07:56,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:07:56,020 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:07:56,021 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:07:56,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:07:56,033 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,154 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,835 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:56,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:57,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:07:57,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:07:57,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:07:57,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:07:57,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (1/1) ... [2024-11-08 16:07:57,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:07:57,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:57,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:07:57,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0709e13-ac36-4bb8-98ae-6c956db24035/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:07:57,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 16:07:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 16:07:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-08 16:07:57,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:07:57,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-08 16:07:57,186 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2024-11-08 16:07:57,187 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2024-11-08 16:07:57,187 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2024-11-08 16:07:57,187 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2024-11-08 16:07:57,187 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2024-11-08 16:07:57,188 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2024-11-08 16:07:57,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:07:57,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:07:57,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-08 16:07:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-08 16:07:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-08 16:07:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2024-11-08 16:07:57,191 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2024-11-08 16:07:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2024-11-08 16:07:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2024-11-08 16:07:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2024-11-08 16:07:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2024-11-08 16:07:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2024-11-08 16:07:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2024-11-08 16:07:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-08 16:07:57,199 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:07:57,856 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:07:57,859 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:08:09,493 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:08:09,493 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:08:23,011 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:08:23,011 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:08:23,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:08:23 BoogieIcfgContainer [2024-11-08 16:08:23,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:08:23,016 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:08:23,016 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:08:23,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:08:23,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:07:53" (1/3) ... [2024-11-08 16:08:23,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740f1005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:08:23, skipping insertion in model container [2024-11-08 16:08:23,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:07:55" (2/3) ... [2024-11-08 16:08:23,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@740f1005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:08:23, skipping insertion in model container [2024-11-08 16:08:23,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:08:23" (3/3) ... [2024-11-08 16:08:23,026 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack-race.i [2024-11-08 16:08:23,049 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:08:23,050 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 621 error locations. [2024-11-08 16:08:23,050 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:08:27,060 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-08 16:08:27,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4615 places, 4740 transitions, 9508 flow [2024-11-08 16:08:46,857 INFO L124 PetriNetUnfolderBase]: 147/4733 cut-off events. [2024-11-08 16:08:46,857 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:08:47,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 4733 events. 147/4733 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 36213 event pairs, 0 based on Foata normal form. 0/3965 useless extension candidates. Maximal degree in co-relation 4660. Up to 6 conditions per place. [2024-11-08 16:08:47,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 4615 places, 4740 transitions, 9508 flow [2024-11-08 16:08:48,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 4608 places, 4733 transitions, 9487 flow [2024-11-08 16:08:48,230 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:08:48,246 INFO L333 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, 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;@5de1ef10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:08:48,247 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1248 error locations. [2024-11-08 16:08:48,274 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:08:48,274 INFO L124 PetriNetUnfolderBase]: 0/70 cut-off events. [2024-11-08 16:08:48,275 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:08:48,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:48,276 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:48,277 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [instrPop3Err0ASSERT_VIOLATIONDATA_RACE, instrPop3Err1ASSERT_VIOLATIONDATA_RACE, instrPop3Err2ASSERT_VIOLATIONDATA_RACE, instrPop3Err3ASSERT_VIOLATIONDATA_RACE (and 1244 more)] === [2024-11-08 16:08:48,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1584938091, now seen corresponding path program 1 times [2024-11-08 16:08:48,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:48,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236181493] [2024-11-08 16:08:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:48,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:08:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236181493] [2024-11-08 16:08:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236181493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:08:50,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:08:50,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:08:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967770853] [2024-11-08 16:08:50,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:08:50,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:08:50,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:08:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:08:57,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3139 out of 4740 [2024-11-08 16:08:57,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 4608 places, 4733 transitions, 9487 flow. Second operand has 6 states, 6 states have (on average 3140.3333333333335) internal successors, (18842), 6 states have internal predecessors, (18842), 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) [2024-11-08 16:08:57,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:57,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3139 of 4740 [2024-11-08 16:08:57,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand