./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/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_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/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_363a90a6-38cb-4181-ba99-47169a11de28/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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:09,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:09,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:45:09,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:09,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:09,520 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:09,521 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:09,522 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:09,523 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:09,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:09,524 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:09,525 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:09,525 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:09,526 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:09,527 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:45:09,527 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:09,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:09,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:09,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:09,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:45:09,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:09,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:45:09,532 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:09,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:45:09,533 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:09,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:09,534 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:09,534 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:09,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:09,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:09,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:09,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:45:09,537 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:09,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:09,538 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:09,538 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:45:09,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:09,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:09,540 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:09,540 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_363a90a6-38cb-4181-ba99-47169a11de28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2023-11-19 07:45:09,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:09,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:09,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:09,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:09,873 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:09,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/twostage_3.i [2023-11-19 07:45:13,043 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:13,379 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:13,385 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/sv-benchmarks/c/pthread/twostage_3.i [2023-11-19 07:45:13,418 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/data/ae6e88cab/e8b4e674a2ed4d6d9a0cd0aaa2e26935/FLAG9ee11fa71 [2023-11-19 07:45:13,434 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/data/ae6e88cab/e8b4e674a2ed4d6d9a0cd0aaa2e26935 [2023-11-19 07:45:13,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:13,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:13,449 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:13,449 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:13,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:13,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:13" (1/1) ... [2023-11-19 07:45:13,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9ed62e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:13, skipping insertion in model container [2023-11-19 07:45:13,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:13" (1/1) ... [2023-11-19 07:45:13,560 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:14,223 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_363a90a6-38cb-4181-ba99-47169a11de28/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2023-11-19 07:45:14,273 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 07:45:14,277 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 07:45:14,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:14,291 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:14,337 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_363a90a6-38cb-4181-ba99-47169a11de28/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2023-11-19 07:45:14,352 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 07:45:14,354 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 07:45:14,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:14,443 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:45:14,452 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:14,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14 WrapperNode [2023-11-19 07:45:14,453 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:14,454 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:14,454 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:14,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:14,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,523 INFO L138 Inliner]: procedures = 374, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 191 [2023-11-19 07:45:14,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:14,524 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:14,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:14,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:14,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:14,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:14,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:14,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:14,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (1/1) ... [2023-11-19 07:45:14,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:14,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:14,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_363a90a6-38cb-4181-ba99-47169a11de28/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:14,686 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2023-11-19 07:45:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2023-11-19 07:45:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2023-11-19 07:45:14,687 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2023-11-19 07:45:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2023-11-19 07:45:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:45:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:45:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:45:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:45:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:45:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:45:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:45:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:14,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:14,691 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 07:45:14,853 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:14,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:15,218 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:15,235 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:15,235 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:45:15,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:15 BoogieIcfgContainer [2023-11-19 07:45:15,241 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:15,243 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:15,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:15,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:15,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:13" (1/3) ... [2023-11-19 07:45:15,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3202812a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:15, skipping insertion in model container [2023-11-19 07:45:15,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:14" (2/3) ... [2023-11-19 07:45:15,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3202812a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:15, skipping insertion in model container [2023-11-19 07:45:15,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:15" (3/3) ... [2023-11-19 07:45:15,250 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2023-11-19 07:45:15,259 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:45:15,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:15,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:45:15,269 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:45:15,359 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 07:45:15,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 242 transitions, 504 flow [2023-11-19 07:45:15,570 INFO L124 PetriNetUnfolderBase]: 41/447 cut-off events. [2023-11-19 07:45:15,570 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:45:15,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 447 events. 41/447 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1626 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-11-19 07:45:15,583 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 242 transitions, 504 flow [2023-11-19 07:45:15,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 240 transitions, 494 flow [2023-11-19 07:45:15,596 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:15,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 240 transitions, 494 flow [2023-11-19 07:45:15,614 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 240 transitions, 494 flow [2023-11-19 07:45:15,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 240 transitions, 494 flow [2023-11-19 07:45:15,773 INFO L124 PetriNetUnfolderBase]: 35/419 cut-off events. [2023-11-19 07:45:15,773 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:45:15,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 419 events. 35/419 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1475 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 247. Up to 8 conditions per place. [2023-11-19 07:45:15,785 INFO L119 LiptonReduction]: Number of co-enabled transitions 6950 [2023-11-19 07:45:40,948 INFO L134 LiptonReduction]: Checked pairs total: 15930 [2023-11-19 07:45:40,948 INFO L136 LiptonReduction]: Total number of compositions: 261 [2023-11-19 07:45:40,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:40,998 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;@5ca99d40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:40,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:45:41,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:45:41,009 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-11-19 07:45:41,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:45:41,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:45:41,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:45:41,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 07:45:41,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 656956294, now seen corresponding path program 1 times [2023-11-19 07:45:41,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:41,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863117585] [2023-11-19 07:45:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:41,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:45:41,384 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:45:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:45:41,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:45:41,679 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:45:41,681 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:45:41,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-19 07:45:41,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:45:41,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:45:41,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:45:41,685 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 07:45:41,695 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:45:41,695 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:45:41,758 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-19 07:45:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 289 transitions, 622 flow [2023-11-19 07:45:42,072 INFO L124 PetriNetUnfolderBase]: 157/1331 cut-off events. [2023-11-19 07:45:42,073 INFO L125 PetriNetUnfolderBase]: For 72/73 co-relation queries the response was YES. [2023-11-19 07:45:42,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1331 events. 157/1331 cut-off events. For 72/73 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7669 event pairs, 2 based on Foata normal form. 0/1181 useless extension candidates. Maximal degree in co-relation 790. Up to 32 conditions per place. [2023-11-19 07:45:42,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 289 transitions, 622 flow [2023-11-19 07:45:42,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 289 transitions, 622 flow [2023-11-19 07:45:42,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:45:42,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 289 transitions, 622 flow [2023-11-19 07:45:42,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 289 transitions, 622 flow [2023-11-19 07:45:42,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 289 transitions, 622 flow [2023-11-19 07:45:42,361 INFO L124 PetriNetUnfolderBase]: 157/1331 cut-off events. [2023-11-19 07:45:42,361 INFO L125 PetriNetUnfolderBase]: For 72/73 co-relation queries the response was YES. [2023-11-19 07:45:42,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1331 events. 157/1331 cut-off events. For 72/73 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7669 event pairs, 2 based on Foata normal form. 0/1181 useless extension candidates. Maximal degree in co-relation 790. Up to 32 conditions per place. [2023-11-19 07:45:42,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 19728 [2023-11-19 07:46:02,780 WARN L293 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 281 DAG size of output: 277 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)