./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 cf1a7837 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_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:53:41,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:53:41,314 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DataRace-32bit-Taipan_Default.epf [2023-11-12 00:53:41,320 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:53:41,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:53:41,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:53:41,354 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:53:41,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:53:41,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:53:41,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:53:41,375 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:53:41,376 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:53:41,376 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:53:41,377 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:53:41,378 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:53:41,378 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:53:41,379 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:53:41,379 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:53:41,380 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:53:41,380 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:53:41,381 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:53:41,383 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:53:41,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:53:41,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:53:41,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:53:41,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:53:41,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:53:41,391 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:53:41,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:53:41,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:53:41,393 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:53:41,393 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-12 00:53:41,394 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:53:41,394 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:53:41,394 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:53:41,394 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:53:41,395 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:53:41,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:53:41,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:41,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:53:41,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:53:41,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:53:41,397 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:53:41,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:53:41,398 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:53:41,398 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:53:41,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:53:41,399 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 [2023-11-12 00:53:41,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:53:41,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:53:41,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:53:41,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:53:41,730 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:53:41,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i [2023-11-12 00:53:44,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:53:45,362 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:53:45,363 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/sv-benchmarks/c/pthread-complex/elimination_backoff_stack-race.i [2023-11-12 00:53:45,386 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/data/b1364b001/ea84cfd16ec2414781443b5645b7115d/FLAGb3167b166 [2023-11-12 00:53:45,402 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/data/b1364b001/ea84cfd16ec2414781443b5645b7115d [2023-11-12 00:53:45,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:53:45,407 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:53:45,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:45,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:53:45,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:53:45,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:45" (1/1) ... [2023-11-12 00:53:45,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261b3c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:45, skipping insertion in model container [2023-11-12 00:53:45,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:53:45" (1/1) ... [2023-11-12 00:53:45,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:53:46,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:46,499 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:53:46,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:53:46,799 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:46,799 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:53:46,807 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:53:46,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46 WrapperNode [2023-11-12 00:53:46,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:53:46,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:46,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:53:46,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:53:46,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:46,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,205 INFO L138 Inliner]: procedures = 397, calls = 215, calls flagged for inlining = 53, calls inlined = 218, statements flattened = 7622 [2023-11-12 00:53:47,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:53:47,207 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:53:47,207 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:53:47,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:53:47,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,790 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,840 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:53:47,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:53:47,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:53:47,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:53:47,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (1/1) ... [2023-11-12 00:53:47,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:47,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:53:47,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:53:47,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43a7a53c-a479-4143-b81b-ea867e808957/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:53:47,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 00:53:47,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:53:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 00:53:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:53:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:53:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:53:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2023-11-12 00:53:47,969 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2023-11-12 00:53:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2023-11-12 00:53:47,970 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2023-11-12 00:53:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2023-11-12 00:53:47,970 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2023-11-12 00:53:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:53:47,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:53:47,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:53:47,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:53:47,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:53:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:53:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2023-11-12 00:53:47,972 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2023-11-12 00:53:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2023-11-12 00:53:47,972 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2023-11-12 00:53:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2023-11-12 00:53:47,974 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2023-11-12 00:53:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2023-11-12 00:53:47,974 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2023-11-12 00:53:47,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:53:47,979 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:53:48,407 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:53:48,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:53:57,443 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:54:07,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:54:07,182 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:54:07,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:07 BoogieIcfgContainer [2023-11-12 00:54:07,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:54:07,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:54:07,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:54:07,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:54:07,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:53:45" (1/3) ... [2023-11-12 00:54:07,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8112a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:07, skipping insertion in model container [2023-11-12 00:54:07,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:53:46" (2/3) ... [2023-11-12 00:54:07,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8112a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:07, skipping insertion in model container [2023-11-12 00:54:07,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:07" (3/3) ... [2023-11-12 00:54:07,201 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack-race.i [2023-11-12 00:54:07,212 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:54:07,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:54:07,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 621 error locations. [2023-11-12 00:54:07,225 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:54:10,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:54:10,160 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:54:10,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 4615 places, 4740 transitions, 9508 flow [2023-11-12 00:54:10,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 4615 places, 4740 transitions, 9508 flow [2023-11-12 00:54:10,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4615 places, 4740 transitions, 9508 flow [2023-11-12 00:54:27,510 INFO L124 PetriNetUnfolderBase]: 147/4733 cut-off events. [2023-11-12 00:54:27,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:54:28,066 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 36314 event pairs, 0 based on Foata normal form. 0/3965 useless extension candidates. Maximal degree in co-relation 4674. Up to 6 conditions per place.