./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ --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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:43:19,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:43:19,743 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:43:19,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:43:19,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:43:19,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:43:19,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:43:19,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:43:19,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:43:19,775 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:43:19,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:43:19,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:43:19,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:43:19,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:43:19,778 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:43:19,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:43:19,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:43:19,787 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:43:19,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:43:19,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:43:19,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:43:19,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:43:19,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:43:19,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:43:19,791 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:43:19,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:43:19,793 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:43:19,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:43:19,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:43:19,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:43:19,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:43:19,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:43:19,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:43:19,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:43:19,797 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:43:19,797 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:43:19,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:43:19,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:43:19,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:43:19,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:43:19,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:43:19,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:43:19,808 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_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2023-11-23 22:43:20,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:43:20,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:43:20,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:43:20,136 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:43:20,137 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:43:20,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-23 22:43:23,328 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:43:23,601 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:43:23,603 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-23 22:43:23,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/data/75a0a7f88/bd62747e531e4a71b9df59afb48b017f/FLAG0011459a0 [2023-11-23 22:43:23,633 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/data/75a0a7f88/bd62747e531e4a71b9df59afb48b017f [2023-11-23 22:43:23,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:43:23,642 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:43:23,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:43:23,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:43:23,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:43:23,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:43:23" (1/1) ... [2023-11-23 22:43:23,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d4d0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:23, skipping insertion in model container [2023-11-23 22:43:23,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:43:23" (1/1) ... [2023-11-23 22:43:23,697 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:43:23,957 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-23 22:43:23,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:43:23,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:43:24,014 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-23 22:43:24,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:43:24,028 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:43:24,029 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:43:24,037 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:43:24,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24 WrapperNode [2023-11-23 22:43:24,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:43:24,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:43:24,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:43:24,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:43:24,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,058 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,102 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 331 [2023-11-23 22:43:24,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:43:24,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:43:24,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:43:24,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:43:24,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,121 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,140 INFO L189 HeapSplitter]: Split 16 memory accesses to 6 slices as follows [2, 2, 2, 2, 6, 2] [2023-11-23 22:43:24,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,160 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,164 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:43:24,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:43:24,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:43:24,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:43:24,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (1/1) ... [2023-11-23 22:43:24,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:43:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:24,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:43:24,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:43:24,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:43:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:43:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:43:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:43:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:43:24,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:43:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:43:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 22:43:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:43:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:43:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:43:24,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:43:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:43:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 22:43:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:43:24,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:43:24,249 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:43:24,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:43:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:43:24,250 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:43:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-23 22:43:24,250 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-23 22:43:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:43:24,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:43:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:43:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:43:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:43:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 22:43:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:43:24,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:43:24,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:43:24,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:43:24,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:43:24,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:43:24,254 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:43:24,404 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:43:24,406 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:43:25,043 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:43:25,744 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:43:25,744 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 22:43:25,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:43:25 BoogieIcfgContainer [2023-11-23 22:43:25,745 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:43:25,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:43:25,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:43:25,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:43:25,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:43:23" (1/3) ... [2023-11-23 22:43:25,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40229bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:43:25, skipping insertion in model container [2023-11-23 22:43:25,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:24" (2/3) ... [2023-11-23 22:43:25,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40229bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:43:25, skipping insertion in model container [2023-11-23 22:43:25,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:43:25" (3/3) ... [2023-11-23 22:43:25,756 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-11-23 22:43:25,767 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:43:25,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:43:25,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:43:25,779 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:43:25,861 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-23 22:43:25,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 51 transitions, 130 flow [2023-11-23 22:43:25,964 INFO L124 PetriNetUnfolderBase]: 6/47 cut-off events. [2023-11-23 22:43:25,965 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-23 22:43:25,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 47 events. 6/47 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-23 22:43:25,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 51 transitions, 130 flow [2023-11-23 22:43:25,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 46 transitions, 116 flow [2023-11-23 22:43:25,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:43:26,002 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d930df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:43:26,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-23 22:43:26,032 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:43:26,032 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2023-11-23 22:43:26,033 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-23 22:43:26,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:26,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:26,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1259852029, now seen corresponding path program 1 times [2023-11-23 22:43:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:26,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113910231] [2023-11-23 22:43:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:26,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:27,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113910231] [2023-11-23 22:43:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113910231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:27,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:27,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:43:27,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758764459] [2023-11-23 22:43:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:27,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:43:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:43:27,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:43:27,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2023-11-23 22:43:27,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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) [2023-11-23 22:43:27,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:27,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2023-11-23 22:43:27,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:28,174 INFO L124 PetriNetUnfolderBase]: 2083/3088 cut-off events. [2023-11-23 22:43:28,175 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2023-11-23 22:43:28,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 3088 events. 2083/3088 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17521 event pairs, 251 based on Foata normal form. 144/3190 useless extension candidates. Maximal degree in co-relation 4745. Up to 1594 conditions per place. [2023-11-23 22:43:28,222 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 71 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2023-11-23 22:43:28,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 399 flow [2023-11-23 22:43:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:43:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:43:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2023-11-23 22:43:28,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339869281045751 [2023-11-23 22:43:28,240 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 194 transitions. [2023-11-23 22:43:28,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 194 transitions. [2023-11-23 22:43:28,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:28,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 194 transitions. [2023-11-23 22:43:28,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 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) [2023-11-23 22:43:28,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 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) [2023-11-23 22:43:28,262 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 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) [2023-11-23 22:43:28,264 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 116 flow. Second operand 6 states and 194 transitions. [2023-11-23 22:43:28,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 399 flow [2023-11-23 22:43:28,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 93 transitions, 361 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-23 22:43:28,286 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 147 flow [2023-11-23 22:43:28,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-23 22:43:28,293 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-11-23 22:43:28,294 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 147 flow [2023-11-23 22:43:28,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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) [2023-11-23 22:43:28,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:28,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:28,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:43:28,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:28,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1263929748, now seen corresponding path program 1 times [2023-11-23 22:43:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747338761] [2023-11-23 22:43:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:28,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:28,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747338761] [2023-11-23 22:43:28,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747338761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:28,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:28,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:43:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2201816] [2023-11-23 22:43:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:43:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:43:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:43:28,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:43:28,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2023-11-23 22:43:28,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:28,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:43:28,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:29,332 INFO L124 PetriNetUnfolderBase]: 1788/2783 cut-off events. [2023-11-23 22:43:29,332 INFO L125 PetriNetUnfolderBase]: For 2172/2421 co-relation queries the response was YES. [2023-11-23 22:43:29,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6722 conditions, 2783 events. 1788/2783 cut-off events. For 2172/2421 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17303 event pairs, 1189 based on Foata normal form. 351/2893 useless extension candidates. Maximal degree in co-relation 3055. Up to 2222 conditions per place. [2023-11-23 22:43:29,368 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 31 selfloop transitions, 2 changer transitions 20/72 dead transitions. [2023-11-23 22:43:29,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 304 flow [2023-11-23 22:43:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:43:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:43:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2023-11-23 22:43:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-23 22:43:29,370 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 136 transitions. [2023-11-23 22:43:29,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 136 transitions. [2023-11-23 22:43:29,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:29,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 136 transitions. [2023-11-23 22:43:29,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-11-23 22:43:29,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-23 22:43:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-23 22:43:29,374 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 147 flow. Second operand 4 states and 136 transitions. [2023-11-23 22:43:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 304 flow [2023-11-23 22:43:29,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:43:29,381 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 160 flow [2023-11-23 22:43:29,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-23 22:43:29,382 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-11-23 22:43:29,383 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 160 flow [2023-11-23 22:43:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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) [2023-11-23 22:43:29,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:29,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:29,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:43:29,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:29,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:29,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1952330475, now seen corresponding path program 1 times [2023-11-23 22:43:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:29,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651014142] [2023-11-23 22:43:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:29,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651014142] [2023-11-23 22:43:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651014142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837700175] [2023-11-23 22:43:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:29,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:29,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:29,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:29,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:43:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:29,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:43:29,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:30,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:30,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837700175] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:30,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:30,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 15 [2023-11-23 22:43:30,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621645345] [2023-11-23 22:43:30,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:30,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:43:30,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:30,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:43:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:43:30,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2023-11-23 22:43:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2023-11-23 22:43:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:30,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2023-11-23 22:43:30,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:31,984 INFO L124 PetriNetUnfolderBase]: 5911/8257 cut-off events. [2023-11-23 22:43:31,985 INFO L125 PetriNetUnfolderBase]: For 2629/2638 co-relation queries the response was YES. [2023-11-23 22:43:32,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19705 conditions, 8257 events. 5911/8257 cut-off events. For 2629/2638 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 52384 event pairs, 1195 based on Foata normal form. 126/7786 useless extension candidates. Maximal degree in co-relation 19690. Up to 2416 conditions per place. [2023-11-23 22:43:32,083 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 90 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2023-11-23 22:43:32,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 113 transitions, 527 flow [2023-11-23 22:43:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:43:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:43:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2023-11-23 22:43:32,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2023-11-23 22:43:32,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2023-11-23 22:43:32,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2023-11-23 22:43:32,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:32,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2023-11-23 22:43:32,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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) [2023-11-23 22:43:32,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 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) [2023-11-23 22:43:32,089 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 51.0) internal successors, (357), 7 states have internal predecessors, (357), 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) [2023-11-23 22:43:32,090 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 160 flow. Second operand 6 states and 186 transitions. [2023-11-23 22:43:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 113 transitions, 527 flow [2023-11-23 22:43:32,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 515 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-23 22:43:32,107 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 240 flow [2023-11-23 22:43:32,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-23 22:43:32,110 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-11-23 22:43:32,110 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 240 flow [2023-11-23 22:43:32,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2023-11-23 22:43:32,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:32,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:32,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:32,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:32,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:32,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash 769894527, now seen corresponding path program 1 times [2023-11-23 22:43:32,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:32,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803734312] [2023-11-23 22:43:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:32,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803734312] [2023-11-23 22:43:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803734312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:43:32,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088095204] [2023-11-23 22:43:32,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:43:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:43:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:43:32,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:43:32,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-23 22:43:32,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:32,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:43:32,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:33,210 INFO L124 PetriNetUnfolderBase]: 1879/3122 cut-off events. [2023-11-23 22:43:33,211 INFO L125 PetriNetUnfolderBase]: For 5399/5786 co-relation queries the response was YES. [2023-11-23 22:43:33,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9033 conditions, 3122 events. 1879/3122 cut-off events. For 5399/5786 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20946 event pairs, 323 based on Foata normal form. 282/3270 useless extension candidates. Maximal degree in co-relation 9012. Up to 2352 conditions per place. [2023-11-23 22:43:33,255 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 44 selfloop transitions, 4 changer transitions 4/75 dead transitions. [2023-11-23 22:43:33,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 75 transitions, 375 flow [2023-11-23 22:43:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:43:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:43:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2023-11-23 22:43:33,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7189542483660131 [2023-11-23 22:43:33,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 110 transitions. [2023-11-23 22:43:33,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 110 transitions. [2023-11-23 22:43:33,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:33,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 110 transitions. [2023-11-23 22:43:33,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 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) [2023-11-23 22:43:33,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2023-11-23 22:43:33,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2023-11-23 22:43:33,261 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 240 flow. Second operand 3 states and 110 transitions. [2023-11-23 22:43:33,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 75 transitions, 375 flow [2023-11-23 22:43:33,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 372 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-23 22:43:33,272 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 239 flow [2023-11-23 22:43:33,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-23 22:43:33,274 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-11-23 22:43:33,274 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 239 flow [2023-11-23 22:43:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2023-11-23 22:43:33,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:33,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:43:33,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:33,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1620997234, now seen corresponding path program 1 times [2023-11-23 22:43:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284589249] [2023-11-23 22:43:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284589249] [2023-11-23 22:43:34,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284589249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:34,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113333109] [2023-11-23 22:43:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:34,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:34,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:34,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:34,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:43:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:34,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 22:43:34,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:34,796 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 23 treesize of output 1 [2023-11-23 22:43:35,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-11-23 22:43:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:35,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:35,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 39 treesize of output 35 [2023-11-23 22:43:35,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 47 treesize of output 35 [2023-11-23 22:43:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:35,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113333109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:35,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:43:35,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-23 22:43:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817415372] [2023-11-23 22:43:35,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:35,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 22:43:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 22:43:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:43:36,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:43:36,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 239 flow. Second operand has 18 states, 18 states have (on average 24.22222222222222) internal successors, (436), 18 states have internal predecessors, (436), 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) [2023-11-23 22:43:36,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:36,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:43:36,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:39,844 INFO L124 PetriNetUnfolderBase]: 7614/12536 cut-off events. [2023-11-23 22:43:39,844 INFO L125 PetriNetUnfolderBase]: For 19974/21367 co-relation queries the response was YES. [2023-11-23 22:43:39,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34816 conditions, 12536 events. 7614/12536 cut-off events. For 19974/21367 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 98988 event pairs, 630 based on Foata normal form. 859/12979 useless extension candidates. Maximal degree in co-relation 18080. Up to 4323 conditions per place. [2023-11-23 22:43:40,029 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 196 selfloop transitions, 47 changer transitions 18/284 dead transitions. [2023-11-23 22:43:40,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 284 transitions, 1553 flow [2023-11-23 22:43:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:43:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-23 22:43:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 600 transitions. [2023-11-23 22:43:40,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920415224913494 [2023-11-23 22:43:40,034 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 600 transitions. [2023-11-23 22:43:40,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 600 transitions. [2023-11-23 22:43:40,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:40,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 600 transitions. [2023-11-23 22:43:40,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 35.294117647058826) internal successors, (600), 17 states have internal predecessors, (600), 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) [2023-11-23 22:43:40,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 51.0) internal successors, (918), 18 states have internal predecessors, (918), 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) [2023-11-23 22:43:40,041 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 51.0) internal successors, (918), 18 states have internal predecessors, (918), 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) [2023-11-23 22:43:40,042 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 239 flow. Second operand 17 states and 600 transitions. [2023-11-23 22:43:40,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 284 transitions, 1553 flow [2023-11-23 22:43:40,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 284 transitions, 1513 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:43:40,078 INFO L231 Difference]: Finished difference. Result has 82 places, 105 transitions, 645 flow [2023-11-23 22:43:40,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=105} [2023-11-23 22:43:40,081 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 29 predicate places. [2023-11-23 22:43:40,081 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 105 transitions, 645 flow [2023-11-23 22:43:40,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.22222222222222) internal successors, (436), 18 states have internal predecessors, (436), 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) [2023-11-23 22:43:40,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:40,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:40,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:40,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:40,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1338788696, now seen corresponding path program 1 times [2023-11-23 22:43:40,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:40,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604384379] [2023-11-23 22:43:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604384379] [2023-11-23 22:43:41,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604384379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498000519] [2023-11-23 22:43:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:41,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:41,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:43:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:41,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:43:41,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:42,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 7 [2023-11-23 22:43:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:43:42,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:42,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:42,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-23 22:43:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:43:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498000519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:42,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:43:42,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 14 [2023-11-23 22:43:42,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188426993] [2023-11-23 22:43:42,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:43:42,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:43:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:43:42,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:43:42,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 105 transitions, 645 flow. Second operand has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2023-11-23 22:43:42,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:42,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:43:42,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:46,247 INFO L124 PetriNetUnfolderBase]: 10348/17116 cut-off events. [2023-11-23 22:43:46,247 INFO L125 PetriNetUnfolderBase]: For 46754/48481 co-relation queries the response was YES. [2023-11-23 22:43:46,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54151 conditions, 17116 events. 10348/17116 cut-off events. For 46754/48481 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 140620 event pairs, 895 based on Foata normal form. 1135/17694 useless extension candidates. Maximal degree in co-relation 42985. Up to 5357 conditions per place. [2023-11-23 22:43:46,515 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 112 selfloop transitions, 64 changer transitions 9/208 dead transitions. [2023-11-23 22:43:46,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 208 transitions, 1441 flow [2023-11-23 22:43:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:43:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-23 22:43:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 466 transitions. [2023-11-23 22:43:46,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571078431372549 [2023-11-23 22:43:46,522 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 466 transitions. [2023-11-23 22:43:46,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 466 transitions. [2023-11-23 22:43:46,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:46,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 466 transitions. [2023-11-23 22:43:46,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 29.125) internal successors, (466), 16 states have internal predecessors, (466), 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) [2023-11-23 22:43:46,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 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) [2023-11-23 22:43:46,531 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 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) [2023-11-23 22:43:46,531 INFO L175 Difference]: Start difference. First operand has 82 places, 105 transitions, 645 flow. Second operand 16 states and 466 transitions. [2023-11-23 22:43:46,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 208 transitions, 1441 flow [2023-11-23 22:43:46,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 208 transitions, 1407 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-23 22:43:46,684 INFO L231 Difference]: Finished difference. Result has 98 places, 130 transitions, 973 flow [2023-11-23 22:43:46,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=973, PETRI_PLACES=98, PETRI_TRANSITIONS=130} [2023-11-23 22:43:46,687 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 45 predicate places. [2023-11-23 22:43:46,688 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 130 transitions, 973 flow [2023-11-23 22:43:46,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2023-11-23 22:43:46,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:46,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:46,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:46,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:46,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash 339345903, now seen corresponding path program 1 times [2023-11-23 22:43:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044384737] [2023-11-23 22:43:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:43:47,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:47,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044384737] [2023-11-23 22:43:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044384737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:47,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:47,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:43:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835555777] [2023-11-23 22:43:47,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:47,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:43:47,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:43:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:43:47,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:43:47,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 130 transitions, 973 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-23 22:43:47,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:47,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:43:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:52,100 INFO L124 PetriNetUnfolderBase]: 15280/24930 cut-off events. [2023-11-23 22:43:52,101 INFO L125 PetriNetUnfolderBase]: For 103750/107270 co-relation queries the response was YES. [2023-11-23 22:43:52,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80170 conditions, 24930 events. 15280/24930 cut-off events. For 103750/107270 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 208047 event pairs, 3991 based on Foata normal form. 2596/26378 useless extension candidates. Maximal degree in co-relation 65660. Up to 12912 conditions per place. [2023-11-23 22:43:52,363 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 150 selfloop transitions, 10 changer transitions 0/183 dead transitions. [2023-11-23 22:43:52,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 183 transitions, 1777 flow [2023-11-23 22:43:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:43:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:43:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2023-11-23 22:43:52,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.738562091503268 [2023-11-23 22:43:52,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2023-11-23 22:43:52,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2023-11-23 22:43:52,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:52,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2023-11-23 22:43:52,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-11-23 22:43:52,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2023-11-23 22:43:52,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2023-11-23 22:43:52,368 INFO L175 Difference]: Start difference. First operand has 98 places, 130 transitions, 973 flow. Second operand 3 states and 113 transitions. [2023-11-23 22:43:52,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 183 transitions, 1777 flow [2023-11-23 22:43:52,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 183 transitions, 1739 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-23 22:43:52,542 INFO L231 Difference]: Finished difference. Result has 98 places, 131 transitions, 1007 flow [2023-11-23 22:43:52,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1007, PETRI_PLACES=98, PETRI_TRANSITIONS=131} [2023-11-23 22:43:52,543 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 45 predicate places. [2023-11-23 22:43:52,544 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 131 transitions, 1007 flow [2023-11-23 22:43:52,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-23 22:43:52,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:52,545 INFO L208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:52,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:43:52,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:43:52,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:52,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1513655636, now seen corresponding path program 2 times [2023-11-23 22:43:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:52,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835969835] [2023-11-23 22:43:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:43:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835969835] [2023-11-23 22:43:52,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835969835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:43:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507987812] [2023-11-23 22:43:52,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:43:52,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:52,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:52,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:43:53,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:43:53,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:53,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:43:53,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:43:53,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:43:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507987812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:53,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:43:53,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2023-11-23 22:43:53,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549777964] [2023-11-23 22:43:53,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:53,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:43:53,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:43:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:43:53,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:43:53,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 131 transitions, 1007 flow. Second operand has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 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) [2023-11-23 22:43:53,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:53,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:43:53,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:43:59,456 INFO L124 PetriNetUnfolderBase]: 22426/36820 cut-off events. [2023-11-23 22:43:59,456 INFO L125 PetriNetUnfolderBase]: For 129832/132792 co-relation queries the response was YES. [2023-11-23 22:43:59,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122657 conditions, 36820 events. 22426/36820 cut-off events. For 129832/132792 co-relation queries the response was YES. Maximal size of possible extension queue 2015. Compared 326763 event pairs, 3439 based on Foata normal form. 1702/37096 useless extension candidates. Maximal degree in co-relation 113932. Up to 15354 conditions per place. [2023-11-23 22:43:59,835 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 128 selfloop transitions, 45 changer transitions 0/196 dead transitions. [2023-11-23 22:43:59,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 196 transitions, 1720 flow [2023-11-23 22:43:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:43:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:43:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2023-11-23 22:43:59,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7794117647058824 [2023-11-23 22:43:59,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 159 transitions. [2023-11-23 22:43:59,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 159 transitions. [2023-11-23 22:43:59,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:43:59,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 159 transitions. [2023-11-23 22:43:59,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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) [2023-11-23 22:43:59,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-23 22:43:59,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-23 22:43:59,841 INFO L175 Difference]: Start difference. First operand has 98 places, 131 transitions, 1007 flow. Second operand 4 states and 159 transitions. [2023-11-23 22:43:59,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 196 transitions, 1720 flow [2023-11-23 22:44:00,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 196 transitions, 1708 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:44:00,576 INFO L231 Difference]: Finished difference. Result has 102 places, 141 transitions, 1314 flow [2023-11-23 22:44:00,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1314, PETRI_PLACES=102, PETRI_TRANSITIONS=141} [2023-11-23 22:44:00,577 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2023-11-23 22:44:00,578 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 141 transitions, 1314 flow [2023-11-23 22:44:00,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 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) [2023-11-23 22:44:00,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:44:00,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:44:00,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:44:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7b3c92a-92b9-4794-9f47-eafce02eb2a9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:44:00,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-23 22:44:00,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:44:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1588731650, now seen corresponding path program 1 times [2023-11-23 22:44:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:44:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134314244] [2023-11-23 22:44:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:44:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:44:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:44:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:44:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134314244] [2023-11-23 22:44:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134314244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:44:00,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:44:00,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:44:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179749417] [2023-11-23 22:44:00,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:44:00,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:44:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:44:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:44:00,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2023-11-23 22:44:00,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 141 transitions, 1314 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-11-23 22:44:00,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:44:00,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2023-11-23 22:44:00,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:44:08,184 INFO L124 PetriNetUnfolderBase]: 25658/42763 cut-off events. [2023-11-23 22:44:08,185 INFO L125 PetriNetUnfolderBase]: For 229494/233725 co-relation queries the response was YES. [2023-11-23 22:44:08,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155605 conditions, 42763 events. 25658/42763 cut-off events. For 229494/233725 co-relation queries the response was YES. Maximal size of possible extension queue 2307. Compared 401634 event pairs, 17181 based on Foata normal form. 3498/43755 useless extension candidates. Maximal degree in co-relation 147491. Up to 24010 conditions per place. [2023-11-23 22:44:08,606 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 136 selfloop transitions, 11 changer transitions 10/180 dead transitions. [2023-11-23 22:44:08,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 180 transitions, 2018 flow [2023-11-23 22:44:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:44:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:44:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2023-11-23 22:44:08,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2023-11-23 22:44:08,611 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 138 transitions. [2023-11-23 22:44:08,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 138 transitions. [2023-11-23 22:44:08,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:44:08,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 138 transitions. [2023-11-23 22:44:08,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2023-11-23 22:44:08,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-23 22:44:08,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-23 22:44:08,614 INFO L175 Difference]: Start difference. First operand has 102 places, 141 transitions, 1314 flow. Second operand 4 states and 138 transitions. [2023-11-23 22:44:08,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 180 transitions, 2018 flow