./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU --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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:37,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:37,495 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:56:37,500 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:37,502 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:37,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:37,532 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:37,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:37,533 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:37,534 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:37,534 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:37,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:37,535 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:37,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:37,536 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:37,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:37,537 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:56:37,537 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:37,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:37,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:37,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:37,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:56:37,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:37,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:56:37,540 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:37,540 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:37,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:56:37,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:37,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:37,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:37,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:37,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:37,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:37,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:37,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:37,544 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:56:37,544 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:37,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:37,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:37,545 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:37,545 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:37,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:37,546 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_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2024-10-31 21:56:37,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:37,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:37,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:37,825 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:37,826 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:37,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i Unable to find full path for "g++" [2024-10-31 21:56:39,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:56:40,116 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:56:40,117 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2024-10-31 21:56:40,135 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/data/9005c4bb1/072722e5b5a8436b968dbb9b9398b953/FLAG7cf2e8974 [2024-10-31 21:56:40,459 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/data/9005c4bb1/072722e5b5a8436b968dbb9b9398b953 [2024-10-31 21:56:40,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:56:40,463 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:56:40,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:40,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:56:40,471 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:56:40,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:40" (1/1) ... [2024-10-31 21:56:40,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d6ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:40, skipping insertion in model container [2024-10-31 21:56:40,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:40" (1/1) ... [2024-10-31 21:56:40,538 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:56:41,085 WARN L251 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_41e09a28-7129-4d61-8fa9-48fef5e4dadc/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-10-31 21:56:41,106 WARN L251 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_41e09a28-7129-4d61-8fa9-48fef5e4dadc/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-10-31 21:56:41,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:41,144 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:56:41,214 WARN L251 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_41e09a28-7129-4d61-8fa9-48fef5e4dadc/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-10-31 21:56:41,221 WARN L251 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_41e09a28-7129-4d61-8fa9-48fef5e4dadc/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-10-31 21:56:41,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:41,284 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:56:41,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41 WrapperNode [2024-10-31 21:56:41,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:41,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:41,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:56:41,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:56:41,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,351 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 138 [2024-10-31 21:56:41,355 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:41,356 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:56:41,356 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:56:41,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:56:41,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,378 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,413 INFO L175 MemorySlicer]: Split 23 memory accesses to 4 slices as follows [2, 1, 12, 8]. 52 percent of accesses are in the largest equivalence class. The 21 initializations are split as follows [2, 1, 10, 8]. The 1 writes are split as follows [0, 0, 1, 0]. [2024-10-31 21:56:41,413 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,445 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:56:41,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:56:41,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:56:41,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:56:41,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (1/1) ... [2024-10-31 21:56:41,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:41,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:56:41,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:56:41,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:56:41,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:56:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 21:56:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 21:56:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-31 21:56:41,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-31 21:56:41,579 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-31 21:56:41,579 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-31 21:56:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:56:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:56:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 21:56:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 21:56:41,580 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 21:56:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:56:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 21:56:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 21:56:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 21:56:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-10-31 21:56:41,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:56:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:56:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 21:56:41,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 21:56:41,586 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 21:56:41,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:56:41,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:56:41,589 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:56:41,797 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:56:41,802 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:56:42,242 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:56:42,242 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:56:42,615 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:56:42,616 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:56:42,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:42 BoogieIcfgContainer [2024-10-31 21:56:42,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:56:42,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:56:42,619 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:56:42,623 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:56:42,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:56:40" (1/3) ... [2024-10-31 21:56:42,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407e4963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:42, skipping insertion in model container [2024-10-31 21:56:42,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:41" (2/3) ... [2024-10-31 21:56:42,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407e4963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:42, skipping insertion in model container [2024-10-31 21:56:42,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:42" (3/3) ... [2024-10-31 21:56:42,626 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-10-31 21:56:42,645 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:56:42,645 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 21:56:42,646 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:56:42,714 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 21:56:42,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2024-10-31 21:56:42,811 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2024-10-31 21:56:42,813 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 21:56:42,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-10-31 21:56:42,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2024-10-31 21:56:42,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2024-10-31 21:56:42,836 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:56:42,845 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;@6e1e0995, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:56:42,845 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-31 21:56:42,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:56:42,868 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-10-31 21:56:42,868 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 21:56:42,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:42,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:42,871 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:42,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -454922836, now seen corresponding path program 1 times [2024-10-31 21:56:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:42,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207658696] [2024-10-31 21:56:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:42,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:43,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:43,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207658696] [2024-10-31 21:56:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207658696] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:43,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:43,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503277287] [2024-10-31 21:56:43,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:43,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:43,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:43,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:43,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-10-31 21:56:43,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:43,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:43,872 INFO L124 PetriNetUnfolderBase]: 300/549 cut-off events. [2024-10-31 21:56:43,872 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-31 21:56:43,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 549 events. 300/549 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2514 event pairs, 210 based on Foata normal form. 39/535 useless extension candidates. Maximal degree in co-relation 989. Up to 463 conditions per place. [2024-10-31 21:56:43,881 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 23 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2024-10-31 21:56:43,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 123 flow [2024-10-31 21:56:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-10-31 21:56:43,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-10-31 21:56:43,901 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 83 flow. Second operand 3 states and 62 transitions. [2024-10-31 21:56:43,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 123 flow [2024-10-31 21:56:43,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:43,908 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 72 flow [2024-10-31 21:56:43,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-10-31 21:56:43,916 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-10-31 21:56:43,916 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 72 flow [2024-10-31 21:56:43,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-10-31 21:56:43,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:43,917 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:43,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:56:43,918 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:43,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1196225897, now seen corresponding path program 1 times [2024-10-31 21:56:43,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:43,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981967916] [2024-10-31 21:56:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981967916] [2024-10-31 21:56:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981967916] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:44,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:44,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576616772] [2024-10-31 21:56:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:44,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:44,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-10-31 21:56:44,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-31 21:56:44,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:44,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-10-31 21:56:44,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:44,212 INFO L124 PetriNetUnfolderBase]: 473/875 cut-off events. [2024-10-31 21:56:44,212 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 21:56:44,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 875 events. 473/875 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3859 event pairs, 165 based on Foata normal form. 14/831 useless extension candidates. Maximal degree in co-relation 1621. Up to 425 conditions per place. [2024-10-31 21:56:44,221 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 36 selfloop transitions, 3 changer transitions 2/50 dead transitions. [2024-10-31 21:56:44,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 191 flow [2024-10-31 21:56:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-10-31 21:56:44,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-10-31 21:56:44,223 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 72 flow. Second operand 3 states and 81 transitions. [2024-10-31 21:56:44,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 191 flow [2024-10-31 21:56:44,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:44,226 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 86 flow [2024-10-31 21:56:44,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-10-31 21:56:44,227 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-10-31 21:56:44,227 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 86 flow [2024-10-31 21:56:44,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-10-31 21:56:44,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:44,228 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:44,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:56:44,229 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:44,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 889160022, now seen corresponding path program 1 times [2024-10-31 21:56:44,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:44,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49442341] [2024-10-31 21:56:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:44,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49442341] [2024-10-31 21:56:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49442341] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:44,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:44,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:44,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932114187] [2024-10-31 21:56:44,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:44,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:44,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:44,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:44,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-10-31 21:56:44,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-31 21:56:44,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:44,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-10-31 21:56:44,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:44,552 INFO L124 PetriNetUnfolderBase]: 305/621 cut-off events. [2024-10-31 21:56:44,552 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-31 21:56:44,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 621 events. 305/621 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2682 event pairs, 81 based on Foata normal form. 28/621 useless extension candidates. Maximal degree in co-relation 1177. Up to 295 conditions per place. [2024-10-31 21:56:44,557 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-10-31 21:56:44,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 179 flow [2024-10-31 21:56:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-10-31 21:56:44,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-10-31 21:56:44,561 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 3 states and 75 transitions. [2024-10-31 21:56:44,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 179 flow [2024-10-31 21:56:44,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:44,564 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 91 flow [2024-10-31 21:56:44,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-10-31 21:56:44,565 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2024-10-31 21:56:44,565 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 91 flow [2024-10-31 21:56:44,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-10-31 21:56:44,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:44,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:44,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:56:44,568 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:44,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1017788201, now seen corresponding path program 1 times [2024-10-31 21:56:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:44,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173593042] [2024-10-31 21:56:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173593042] [2024-10-31 21:56:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173593042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:44,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:44,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534755136] [2024-10-31 21:56:44,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:44,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:44,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:44,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:44,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:44,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-10-31 21:56:44,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:44,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:44,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:44,995 INFO L124 PetriNetUnfolderBase]: 355/724 cut-off events. [2024-10-31 21:56:44,996 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-10-31 21:56:44,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 724 events. 355/724 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3076 event pairs, 124 based on Foata normal form. 0/693 useless extension candidates. Maximal degree in co-relation 1456. Up to 402 conditions per place. [2024-10-31 21:56:45,000 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 35 selfloop transitions, 2 changer transitions 3/49 dead transitions. [2024-10-31 21:56:45,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 212 flow [2024-10-31 21:56:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:45,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-10-31 21:56:45,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-10-31 21:56:45,005 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 91 flow. Second operand 3 states and 76 transitions. [2024-10-31 21:56:45,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 212 flow [2024-10-31 21:56:45,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:45,010 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 99 flow [2024-10-31 21:56:45,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-10-31 21:56:45,012 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2024-10-31 21:56:45,012 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 99 flow [2024-10-31 21:56:45,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-10-31 21:56:45,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:45,012 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] [2024-10-31 21:56:45,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:56:45,013 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:45,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash -530118368, now seen corresponding path program 1 times [2024-10-31 21:56:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412118303] [2024-10-31 21:56:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:56:45,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751125390] [2024-10-31 21:56:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:45,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:45,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:45,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:45,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:56:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:45,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:56:45,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:45,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:56:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:45,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:45,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412118303] [2024-10-31 21:56:45,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:56:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751125390] [2024-10-31 21:56:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751125390] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:45,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502105522] [2024-10-31 21:56:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:45,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:56:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:56:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:46,006 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:46,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 99 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:46,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:46,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:46,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:46,516 INFO L124 PetriNetUnfolderBase]: 479/986 cut-off events. [2024-10-31 21:56:46,516 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-10-31 21:56:46,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 986 events. 479/986 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4849 event pairs, 125 based on Foata normal form. 29/981 useless extension candidates. Maximal degree in co-relation 1999. Up to 434 conditions per place. [2024-10-31 21:56:46,522 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 60 selfloop transitions, 12 changer transitions 7/88 dead transitions. [2024-10-31 21:56:46,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 396 flow [2024-10-31 21:56:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-10-31 21:56:46,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-10-31 21:56:46,525 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 99 flow. Second operand 8 states and 179 transitions. [2024-10-31 21:56:46,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 396 flow [2024-10-31 21:56:46,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 88 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:46,528 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 185 flow [2024-10-31 21:56:46,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-31 21:56:46,529 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-10-31 21:56:46,529 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 185 flow [2024-10-31 21:56:46,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:46,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:46,530 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] [2024-10-31 21:56:46,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:46,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:46,731 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:46,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash 345076506, now seen corresponding path program 2 times [2024-10-31 21:56:46,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:46,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531036671] [2024-10-31 21:56:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:56:46,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031430238] [2024-10-31 21:56:46,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:46,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:46,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:46,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:56:46,934 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 21:56:46,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:46,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 21:56:46,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:47,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 21:56:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:47,361 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:47,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:47,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531036671] [2024-10-31 21:56:47,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:56:47,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031430238] [2024-10-31 21:56:47,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031430238] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:47,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:47,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:47,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206796942] [2024-10-31 21:56:47,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:47,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:56:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:47,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:56:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:47,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:47,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:47,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:47,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:47,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:47,909 INFO L124 PetriNetUnfolderBase]: 648/1364 cut-off events. [2024-10-31 21:56:47,909 INFO L125 PetriNetUnfolderBase]: For 796/796 co-relation queries the response was YES. [2024-10-31 21:56:47,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3413 conditions, 1364 events. 648/1364 cut-off events. For 796/796 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7636 event pairs, 206 based on Foata normal form. 44/1367 useless extension candidates. Maximal degree in co-relation 3396. Up to 546 conditions per place. [2024-10-31 21:56:47,920 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 67 selfloop transitions, 19 changer transitions 7/102 dead transitions. [2024-10-31 21:56:47,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 102 transitions, 590 flow [2024-10-31 21:56:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-10-31 21:56:47,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-10-31 21:56:47,922 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 185 flow. Second operand 8 states and 182 transitions. [2024-10-31 21:56:47,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 102 transitions, 590 flow [2024-10-31 21:56:47,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 102 transitions, 572 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:47,931 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 340 flow [2024-10-31 21:56:47,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-10-31 21:56:47,932 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-10-31 21:56:47,934 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 340 flow [2024-10-31 21:56:47,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:47,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:47,934 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] [2024-10-31 21:56:47,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:56:48,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:48,139 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:48,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash 392045082, now seen corresponding path program 3 times [2024-10-31 21:56:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:48,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436654854] [2024-10-31 21:56:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:48,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:56:48,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382371692] [2024-10-31 21:56:48,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:56:48,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:48,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:48,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:56:48,368 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-31 21:56:48,368 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:48,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:56:48,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:48,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:56:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:48,927 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436654854] [2024-10-31 21:56:48,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:56:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382371692] [2024-10-31 21:56:48,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382371692] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:48,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:48,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:48,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921656650] [2024-10-31 21:56:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:48,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:56:48,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:56:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:48,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:48,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 340 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:48,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:48,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:48,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:49,624 INFO L124 PetriNetUnfolderBase]: 712/1499 cut-off events. [2024-10-31 21:56:49,625 INFO L125 PetriNetUnfolderBase]: For 2407/2411 co-relation queries the response was YES. [2024-10-31 21:56:49,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4367 conditions, 1499 events. 712/1499 cut-off events. For 2407/2411 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8611 event pairs, 219 based on Foata normal form. 15/1473 useless extension candidates. Maximal degree in co-relation 4344. Up to 654 conditions per place. [2024-10-31 21:56:49,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 75 selfloop transitions, 21 changer transitions 4/109 dead transitions. [2024-10-31 21:56:49,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 758 flow [2024-10-31 21:56:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-10-31 21:56:49,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-10-31 21:56:49,640 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 340 flow. Second operand 8 states and 181 transitions. [2024-10-31 21:56:49,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 758 flow [2024-10-31 21:56:49,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 730 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:49,654 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 467 flow [2024-10-31 21:56:49,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-10-31 21:56:49,656 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2024-10-31 21:56:49,656 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 467 flow [2024-10-31 21:56:49,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:49,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:49,657 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] [2024-10-31 21:56:49,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:56:49,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:49,862 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:49,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1318771242, now seen corresponding path program 4 times [2024-10-31 21:56:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:49,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717517450] [2024-10-31 21:56:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:56:49,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103990366] [2024-10-31 21:56:49,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:56:49,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:49,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:49,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:49,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:56:50,153 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 21:56:50,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:50,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:56:50,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:50,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 21:56:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:50,461 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:50,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717517450] [2024-10-31 21:56:50,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:56:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103990366] [2024-10-31 21:56:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103990366] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:50,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:50,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 21:56:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204627188] [2024-10-31 21:56:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:50,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:56:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:56:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:56:50,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:50,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:50,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:50,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:50,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:51,169 INFO L124 PetriNetUnfolderBase]: 874/1872 cut-off events. [2024-10-31 21:56:51,169 INFO L125 PetriNetUnfolderBase]: For 3663/3671 co-relation queries the response was YES. [2024-10-31 21:56:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5690 conditions, 1872 events. 874/1872 cut-off events. For 3663/3671 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11447 event pairs, 162 based on Foata normal form. 15/1842 useless extension candidates. Maximal degree in co-relation 5662. Up to 506 conditions per place. [2024-10-31 21:56:51,186 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 85 selfloop transitions, 28 changer transitions 7/129 dead transitions. [2024-10-31 21:56:51,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 993 flow [2024-10-31 21:56:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-10-31 21:56:51,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-10-31 21:56:51,188 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 467 flow. Second operand 8 states and 193 transitions. [2024-10-31 21:56:51,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 993 flow [2024-10-31 21:56:51,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 954 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:51,210 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 584 flow [2024-10-31 21:56:51,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2024-10-31 21:56:51,211 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-10-31 21:56:51,211 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 584 flow [2024-10-31 21:56:51,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 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) [2024-10-31 21:56:51,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:51,212 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:51,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:51,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:51,413 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:51,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:51,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1002015270, now seen corresponding path program 1 times [2024-10-31 21:56:51,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:51,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764306416] [2024-10-31 21:56:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:51,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:51,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:51,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764306416] [2024-10-31 21:56:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764306416] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:51,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:51,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:56:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863234450] [2024-10-31 21:56:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:51,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:51,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:51,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-10-31 21:56:51,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-31 21:56:51,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:51,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-10-31 21:56:51,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:51,829 INFO L124 PetriNetUnfolderBase]: 816/1727 cut-off events. [2024-10-31 21:56:51,829 INFO L125 PetriNetUnfolderBase]: For 4712/4712 co-relation queries the response was YES. [2024-10-31 21:56:51,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5511 conditions, 1727 events. 816/1727 cut-off events. For 4712/4712 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9960 event pairs, 204 based on Foata normal form. 52/1743 useless extension candidates. Maximal degree in co-relation 5480. Up to 1076 conditions per place. [2024-10-31 21:56:51,842 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 65 selfloop transitions, 2 changer transitions 12/87 dead transitions. [2024-10-31 21:56:51,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 791 flow [2024-10-31 21:56:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-10-31 21:56:51,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-10-31 21:56:51,843 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 584 flow. Second operand 3 states and 75 transitions. [2024-10-31 21:56:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 791 flow [2024-10-31 21:56:51,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 713 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-10-31 21:56:51,861 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 423 flow [2024-10-31 21:56:51,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2024-10-31 21:56:51,863 INFO L277 CegarLoopForPetriNet]: 37 programPoint places, 40 predicate places. [2024-10-31 21:56:51,863 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 423 flow [2024-10-31 21:56:51,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-31 21:56:51,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:51,863 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:51,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 21:56:51,864 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-31 21:56:51,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1999170368, now seen corresponding path program 1 times [2024-10-31 21:56:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:51,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040395936] [2024-10-31 21:56:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:51,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:56:51,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734327495] [2024-10-31 21:56:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:51,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:51,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:51,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:51,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:56:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 21:56:52,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 21:56:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 21:56:52,143 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 21:56:52,144 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 21:56:52,145 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-10-31 21:56:52,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-10-31 21:56:52,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-10-31 21:56:52,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-31 21:56:52,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-31 21:56:52,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-31 21:56:52,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:52,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:52,352 INFO L407 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:52,429 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-31 21:56:52,429 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 21:56:52,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 09:56:52 BasicIcfg [2024-10-31 21:56:52,437 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 21:56:52,438 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-31 21:56:52,439 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-31 21:56:52,439 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-31 21:56:52,439 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:42" (3/4) ... [2024-10-31 21:56:52,440 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-10-31 21:56:52,518 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/witness.graphml [2024-10-31 21:56:52,518 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-31 21:56:52,518 INFO L158 Benchmark]: Toolchain (without parser) took 12055.58ms. Allocated memory was 153.1MB in the beginning and 247.5MB in the end (delta: 94.4MB). Free memory was 113.3MB in the beginning and 160.1MB in the end (delta: -46.8MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,519 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 153.1MB. Free memory is still 122.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 21:56:52,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 822.12ms. Allocated memory is still 153.1MB. Free memory was 112.8MB in the beginning and 89.6MB in the end (delta: 23.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,519 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.51ms. Allocated memory is still 153.1MB. Free memory was 89.6MB in the beginning and 87.0MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,520 INFO L158 Benchmark]: Boogie Preprocessor took 96.01ms. Allocated memory is still 153.1MB. Free memory was 87.0MB in the beginning and 84.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,520 INFO L158 Benchmark]: RCFGBuilder took 1163.64ms. Allocated memory was 153.1MB in the beginning and 205.5MB in the end (delta: 52.4MB). Free memory was 84.4MB in the beginning and 156.7MB in the end (delta: -72.3MB). Peak memory consumption was 40.8MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,520 INFO L158 Benchmark]: TraceAbstraction took 9818.08ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 155.8MB in the beginning and 167.4MB in the end (delta: -11.6MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,521 INFO L158 Benchmark]: Witness Printer took 79.40ms. Allocated memory is still 247.5MB. Free memory was 167.4MB in the beginning and 160.1MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-31 21:56:52,523 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 153.1MB. Free memory is still 122.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 822.12ms. Allocated memory is still 153.1MB. Free memory was 112.8MB in the beginning and 89.6MB in the end (delta: 23.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.51ms. Allocated memory is still 153.1MB. Free memory was 89.6MB in the beginning and 87.0MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 96.01ms. Allocated memory is still 153.1MB. Free memory was 87.0MB in the beginning and 84.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1163.64ms. Allocated memory was 153.1MB in the beginning and 205.5MB in the end (delta: 52.4MB). Free memory was 84.4MB in the beginning and 156.7MB in the end (delta: -72.3MB). Peak memory consumption was 40.8MB. Max. memory is 16.1GB. * TraceAbstraction took 9818.08ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 155.8MB in the beginning and 167.4MB in the end (delta: -11.6MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. * Witness Printer took 79.40ms. Allocated memory is still 247.5MB. Free memory was 167.4MB in the beginning and 160.1MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1=-1, id2=0, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [\old(arg)={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 383 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 341 mSDsluCounter, 117 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 104 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1690 IncrementalHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 13 mSDtfsCounter, 1690 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=584occurred in iteration=8, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 307 NumberOfCodeBlocks, 307 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1458 SizeOfPredicates, 40 NumberOfNonLiveVariables, 772 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 5/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-10-31 21:56:52,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e09a28-7129-4d61-8fa9-48fef5e4dadc/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE