./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/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_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a77b23de3110741cf9e339cfb9f72e965f6bc6bc082cff0044fedc6c4916cfb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:58,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:59,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:59,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:59,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:59,150 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:59,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:59,152 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:59,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:59,161 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:59,162 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:59,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:59,164 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:59,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:59,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:59,167 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:59,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:59,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:59,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:59,169 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:59,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:59,170 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:59,171 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:59,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:59,171 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:59,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:59,173 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:59,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:59,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:59,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:59,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:59,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:59,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:59,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:59,177 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:59,177 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:59,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:59,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:59,178 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:59,178 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_3c63c2c3-f260-477d-842c-11175e217669/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a77b23de3110741cf9e339cfb9f72e965f6bc6bc082cff0044fedc6c4916cfb [2023-11-19 08:05:59,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:59,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:59,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:59,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:59,579 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:59,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2023-11-19 08:06:02,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:06:03,320 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:06:03,321 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2023-11-19 08:06:03,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/data/b8f2966b4/b5f968de3fd14e329ce521acc73d6034/FLAGee2a09a85 [2023-11-19 08:06:03,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/data/b8f2966b4/b5f968de3fd14e329ce521acc73d6034 [2023-11-19 08:06:03,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:06:03,384 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:06:03,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:03,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:06:03,392 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:06:03,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:03" (1/1) ... [2023-11-19 08:06:03,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190b62ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:03, skipping insertion in model container [2023-11-19 08:06:03,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:03" (1/1) ... [2023-11-19 08:06:03,486 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:06:04,428 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63614,63627] [2023-11-19 08:06:04,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:04,475 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:06:04,538 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63614,63627] [2023-11-19 08:06:04,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:06:04,744 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:04,744 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:06:04,753 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:06:04,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04 WrapperNode [2023-11-19 08:06:04,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:06:04,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:04,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:06:04,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:06:04,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:04,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,024 INFO L138 Inliner]: procedures = 397, calls = 218, calls flagged for inlining = 52, calls inlined = 211, statements flattened = 3786 [2023-11-19 08:06:05,025 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:06:05,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:06:05,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:06:05,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:06:05,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:06:05,333 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:06:05,333 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:06:05,333 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:06:05,334 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (1/1) ... [2023-11-19 08:06:05,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:06:05,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:05,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:06:05,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c63c2c3-f260-477d-842c-11175e217669/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:06:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:06:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:06:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:06:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:06:05,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:06:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 08:06:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2023-11-19 08:06:05,429 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2023-11-19 08:06:05,429 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2023-11-19 08:06:05,430 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2023-11-19 08:06:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2023-11-19 08:06:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2023-11-19 08:06:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:06:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:06:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:06:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 08:06:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 08:06:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:06:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2023-11-19 08:06:05,434 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2023-11-19 08:06:05,434 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2023-11-19 08:06:05,434 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2023-11-19 08:06:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2023-11-19 08:06:05,435 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2023-11-19 08:06:05,435 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2023-11-19 08:06:05,435 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2023-11-19 08:06:05,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:06:05,439 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 08:06:05,943 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:06:05,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:06:09,941 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:06:13,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:06:13,733 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 08:06:13,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:13 BoogieIcfgContainer [2023-11-19 08:06:13,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:06:13,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:06:13,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:06:13,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:06:13,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:06:03" (1/3) ... [2023-11-19 08:06:13,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bfee3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:13, skipping insertion in model container [2023-11-19 08:06:13,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:04" (2/3) ... [2023-11-19 08:06:13,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bfee3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:13, skipping insertion in model container [2023-11-19 08:06:13,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:13" (3/3) ... [2023-11-19 08:06:13,762 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.i [2023-11-19 08:06:13,773 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:06:13,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:06:13,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-11-19 08:06:13,786 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:06:14,842 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:06:14,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2412 places, 2541 transitions, 5110 flow [2023-11-19 08:06:20,606 INFO L124 PetriNetUnfolderBase]: 151/2534 cut-off events. [2023-11-19 08:06:20,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:20,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2534 events. 151/2534 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 17449 event pairs, 0 based on Foata normal form. 0/2376 useless extension candidates. Maximal degree in co-relation 2484. Up to 6 conditions per place. [2023-11-19 08:06:20,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 2412 places, 2541 transitions, 5110 flow [2023-11-19 08:06:20,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2405 places, 2534 transitions, 5089 flow [2023-11-19 08:06:20,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:06:20,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2405 places, 2534 transitions, 5089 flow [2023-11-19 08:06:20,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2405 places, 2534 transitions, 5089 flow [2023-11-19 08:06:20,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2405 places, 2534 transitions, 5089 flow [2023-11-19 08:06:26,306 INFO L124 PetriNetUnfolderBase]: 151/2534 cut-off events. [2023-11-19 08:06:26,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:06:26,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 2534 events. 151/2534 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 17442 event pairs, 0 based on Foata normal form. 0/2376 useless extension candidates. Maximal degree in co-relation 2484. Up to 6 conditions per place. [2023-11-19 08:06:28,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 5186100 [2023-11-19 08:06:48,633 WARN L293 SmtUtils]: Spent 16.42s on a formula simplification. DAG size of input: 282 DAG size of output: 275 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)