./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:11,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:11,389 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 21:56:11,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:11,394 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:11,416 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:11,417 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:11,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:11,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:11,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:11,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:11,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:11,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:11,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:11,421 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:11,422 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:11,422 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:11,423 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:11,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:11,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:11,424 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 21:56:11,425 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 21:56:11,425 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 21:56:11,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:11,426 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 21:56:11,426 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:11,427 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 21:56:11,427 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:11,427 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:11,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:11,428 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:11,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:11,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:11,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:11,430 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:11,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:11,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:11,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:11,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:11,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:11,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:11,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:11,433 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_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-10-31 21:56:11,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:11,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:11,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:11,733 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:11,734 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:11,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c Unable to find full path for "g++" [2024-10-31 21:56:13,891 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:56:14,136 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:56:14,137 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-10-31 21:56:14,152 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/data/e3650cac4/23687b4381bb40bfb4760ae497c925df/FLAGa24486b2e [2024-10-31 21:56:14,466 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/data/e3650cac4/23687b4381bb40bfb4760ae497c925df [2024-10-31 21:56:14,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:56:14,471 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:56:14,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:14,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:56:14,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:56:14,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c33db70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14, skipping insertion in model container [2024-10-31 21:56:14,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,517 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:56:14,748 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 21:56:14,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:14,761 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:56:14,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:56:14,810 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:56:14,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14 WrapperNode [2024-10-31 21:56:14,810 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:56:14,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:14,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:56:14,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:56:14,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,856 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 20, statements flattened = 218 [2024-10-31 21:56:14,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:56:14,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:56:14,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:56:14,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:56:14,869 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,873 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,891 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 21:56:14,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,900 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,905 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:56:14,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:56:14,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:56:14,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:56:14,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (1/1) ... [2024-10-31 21:56:14,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:14,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:14,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:56:14,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:56:15,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:56:15,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:56:15,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:56:15,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:56:15,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:56:15,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 21:56:15,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 21:56:15,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:56:15,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:56:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:56:15,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:56:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:56:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:56:15,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:56:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:56:15,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:56:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:56:15,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:56:15,009 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:56:15,215 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:56:15,218 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:56:15,734 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:56:15,735 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:56:16,213 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:56:16,213 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 21:56:16,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:16 BoogieIcfgContainer [2024-10-31 21:56:16,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:56:16,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:56:16,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:56:16,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:56:16,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:56:14" (1/3) ... [2024-10-31 21:56:16,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7134d9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:16, skipping insertion in model container [2024-10-31 21:56:16,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:56:14" (2/3) ... [2024-10-31 21:56:16,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7134d9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:56:16, skipping insertion in model container [2024-10-31 21:56:16,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:56:16" (3/3) ... [2024-10-31 21:56:16,222 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-10-31 21:56:16,241 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:56:16,242 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-10-31 21:56:16,242 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:56:16,344 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 21:56:16,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 58 transitions, 137 flow [2024-10-31 21:56:16,432 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-10-31 21:56:16,432 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:56:16,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 55 events. 6/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 144 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-10-31 21:56:16,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 58 transitions, 137 flow [2024-10-31 21:56:16,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 54 transitions, 126 flow [2024-10-31 21:56:16,450 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:56:16,457 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@67149a43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:56:16,457 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-10-31 21:56:16,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:56:16,461 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 21:56:16,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 21:56:16,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:16,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:56:16,463 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:16,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash 725632, now seen corresponding path program 1 times [2024-10-31 21:56:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177797313] [2024-10-31 21:56:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:16,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177797313] [2024-10-31 21:56:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177797313] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:16,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:56:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131517865] [2024-10-31 21:56:16,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:16,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:16,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:16,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:16,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:16,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:16,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:16,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:16,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:17,386 INFO L124 PetriNetUnfolderBase]: 1076/1573 cut-off events. [2024-10-31 21:56:17,386 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-10-31 21:56:17,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 1573 events. 1076/1573 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6768 event pairs, 723 based on Foata normal form. 1/1429 useless extension candidates. Maximal degree in co-relation 2878. Up to 1475 conditions per place. [2024-10-31 21:56:17,408 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 30 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-10-31 21:56:17,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 176 flow [2024-10-31 21:56:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-10-31 21:56:17,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-10-31 21:56:17,426 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 95 transitions. [2024-10-31 21:56:17,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 176 flow [2024-10-31 21:56:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:56:17,439 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 104 flow [2024-10-31 21:56:17,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2024-10-31 21:56:17,447 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2024-10-31 21:56:17,448 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 104 flow [2024-10-31 21:56:17,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:17,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:17,449 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:56:17,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:56:17,450 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:17,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 725633, now seen corresponding path program 1 times [2024-10-31 21:56:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:17,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529335587] [2024-10-31 21:56:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529335587] [2024-10-31 21:56:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529335587] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:17,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:17,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:17,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260675123] [2024-10-31 21:56:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:17,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:17,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:17,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:17,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:17,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:17,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:18,319 INFO L124 PetriNetUnfolderBase]: 1077/1576 cut-off events. [2024-10-31 21:56:18,319 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-31 21:56:18,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3094 conditions, 1576 events. 1077/1576 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6764 event pairs, 723 based on Foata normal form. 0/1431 useless extension candidates. Maximal degree in co-relation 3072. Up to 1480 conditions per place. [2024-10-31 21:56:18,334 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-10-31 21:56:18,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 184 flow [2024-10-31 21:56:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-31 21:56:18,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-10-31 21:56:18,337 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 104 flow. Second operand 4 states and 113 transitions. [2024-10-31 21:56:18,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 184 flow [2024-10-31 21:56:18,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:18,340 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 127 flow [2024-10-31 21:56:18,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-10-31 21:56:18,342 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2024-10-31 21:56:18,342 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 127 flow [2024-10-31 21:56:18,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:18,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:18,342 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 21:56:18,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:56:18,344 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:18,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash 697356455, now seen corresponding path program 1 times [2024-10-31 21:56:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:18,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99094285] [2024-10-31 21:56:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:18,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99094285] [2024-10-31 21:56:18,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99094285] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:18,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982072622] [2024-10-31 21:56:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:18,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:18,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:18,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:18,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:56:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:18,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 21:56:18,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:18,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-10-31 21:56:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:19,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:19,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982072622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:19,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:19,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 21:56:19,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424755565] [2024-10-31 21:56:19,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:19,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:56:19,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:56:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:56:19,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:19,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:19,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:20,334 INFO L124 PetriNetUnfolderBase]: 1078/1578 cut-off events. [2024-10-31 21:56:20,335 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-31 21:56:20,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3110 conditions, 1578 events. 1078/1578 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6767 event pairs, 723 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 3079. Up to 1477 conditions per place. [2024-10-31 21:56:20,347 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 28 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-10-31 21:56:20,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 211 flow [2024-10-31 21:56:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-10-31 21:56:20,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-10-31 21:56:20,350 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 127 flow. Second operand 8 states and 192 transitions. [2024-10-31 21:56:20,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 211 flow [2024-10-31 21:56:20,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:56:20,357 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 152 flow [2024-10-31 21:56:20,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-10-31 21:56:20,358 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-10-31 21:56:20,358 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 152 flow [2024-10-31 21:56:20,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:20,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:20,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 21:56:20,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:56:20,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:20,560 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:20,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 146355160, now seen corresponding path program 1 times [2024-10-31 21:56:20,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848183596] [2024-10-31 21:56:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:20,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:20,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848183596] [2024-10-31 21:56:20,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848183596] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:20,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:20,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968090337] [2024-10-31 21:56:20,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:20,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:56:20,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:20,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:56:20,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:56:20,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2024-10-31 21:56:20,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:20,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:20,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2024-10-31 21:56:20,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:20,908 INFO L124 PetriNetUnfolderBase]: 921/1347 cut-off events. [2024-10-31 21:56:20,908 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-31 21:56:20,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1347 events. 921/1347 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5498 event pairs, 608 based on Foata normal form. 0/1275 useless extension candidates. Maximal degree in co-relation 2636. Up to 1263 conditions per place. [2024-10-31 21:56:20,918 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-10-31 21:56:20,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 216 flow [2024-10-31 21:56:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:56:20,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:56:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-31 21:56:20,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-10-31 21:56:20,921 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 152 flow. Second operand 4 states and 96 transitions. [2024-10-31 21:56:20,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 216 flow [2024-10-31 21:56:20,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 174 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-31 21:56:20,923 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 108 flow [2024-10-31 21:56:20,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-10-31 21:56:20,925 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-10-31 21:56:20,925 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 108 flow [2024-10-31 21:56:20,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:20,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:20,926 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 21:56:20,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 21:56:20,926 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:20,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:20,927 INFO L85 PathProgramCache]: Analyzing trace with hash 146355161, now seen corresponding path program 1 times [2024-10-31 21:56:20,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:20,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601685148] [2024-10-31 21:56:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:20,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601685148] [2024-10-31 21:56:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601685148] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:20,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:20,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:56:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871666631] [2024-10-31 21:56:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:20,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:56:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:56:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:56:21,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-10-31 21:56:21,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:21,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:21,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-10-31 21:56:21,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:21,335 INFO L124 PetriNetUnfolderBase]: 920/1346 cut-off events. [2024-10-31 21:56:21,335 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-31 21:56:21,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1346 events. 920/1346 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5513 event pairs, 608 based on Foata normal form. 1/1277 useless extension candidates. Maximal degree in co-relation 2628. Up to 1268 conditions per place. [2024-10-31 21:56:21,348 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-10-31 21:56:21,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 176 flow [2024-10-31 21:56:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:56:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:56:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-10-31 21:56:21,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-10-31 21:56:21,355 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 108 flow. Second operand 3 states and 94 transitions. [2024-10-31 21:56:21,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 176 flow [2024-10-31 21:56:21,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:21,358 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 104 flow [2024-10-31 21:56:21,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-10-31 21:56:21,359 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-10-31 21:56:21,359 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 104 flow [2024-10-31 21:56:21,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:21,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:21,360 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:21,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 21:56:21,360 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:21,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash 193199091, now seen corresponding path program 1 times [2024-10-31 21:56:21,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:21,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138790988] [2024-10-31 21:56:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:21,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138790988] [2024-10-31 21:56:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138790988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713089644] [2024-10-31 21:56:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:21,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:21,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:56:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:21,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 21:56:21,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:21,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:21,916 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 22 treesize of output 18 [2024-10-31 21:56:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:21,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713089644] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:21,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:21,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 21:56:21,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422158990] [2024-10-31 21:56:21,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:21,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:56:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:56:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:56:22,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-10-31 21:56:22,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 104 flow. Second operand has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:22,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:22,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-10-31 21:56:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:22,847 INFO L124 PetriNetUnfolderBase]: 1680/2529 cut-off events. [2024-10-31 21:56:22,847 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-31 21:56:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4868 conditions, 2529 events. 1680/2529 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12419 event pairs, 483 based on Foata normal form. 0/2360 useless extension candidates. Maximal degree in co-relation 4857. Up to 1041 conditions per place. [2024-10-31 21:56:22,867 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 65 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-10-31 21:56:22,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 82 transitions, 328 flow [2024-10-31 21:56:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:56:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 21:56:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-10-31 21:56:22,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-10-31 21:56:22,869 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 104 flow. Second operand 7 states and 200 transitions. [2024-10-31 21:56:22,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 82 transitions, 328 flow [2024-10-31 21:56:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:22,872 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 138 flow [2024-10-31 21:56:22,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-10-31 21:56:22,873 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-10-31 21:56:22,873 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 138 flow [2024-10-31 21:56:22,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:22,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:22,874 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:22,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:56:23,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:23,075 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:23,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 974478481, now seen corresponding path program 1 times [2024-10-31 21:56:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:23,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599503765] [2024-10-31 21:56:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:23,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:23,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:23,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599503765] [2024-10-31 21:56:23,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599503765] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:23,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947422939] [2024-10-31 21:56:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:23,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:23,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:23,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:56:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:23,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 21:56:23,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:23,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947422939] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:23,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 21:56:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097154528] [2024-10-31 21:56:23,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:23,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 21:56:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 21:56:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:56:23,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:23,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:23,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:23,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:23,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:24,523 INFO L124 PetriNetUnfolderBase]: 2559/3899 cut-off events. [2024-10-31 21:56:24,524 INFO L125 PetriNetUnfolderBase]: For 1568/1623 co-relation queries the response was YES. [2024-10-31 21:56:24,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8790 conditions, 3899 events. 2559/3899 cut-off events. For 1568/1623 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20169 event pairs, 1504 based on Foata normal form. 0/3620 useless extension candidates. Maximal degree in co-relation 6023. Up to 2430 conditions per place. [2024-10-31 21:56:24,556 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 76 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-10-31 21:56:24,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 446 flow [2024-10-31 21:56:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:56:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 21:56:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-10-31 21:56:24,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5147783251231527 [2024-10-31 21:56:24,558 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 138 flow. Second operand 7 states and 209 transitions. [2024-10-31 21:56:24,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 446 flow [2024-10-31 21:56:24,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:24,563 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 163 flow [2024-10-31 21:56:24,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-10-31 21:56:24,564 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-10-31 21:56:24,564 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 163 flow [2024-10-31 21:56:24,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:24,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:24,565 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:24,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:56:24,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:24,769 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:24,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash -878016597, now seen corresponding path program 2 times [2024-10-31 21:56:24,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:24,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624072959] [2024-10-31 21:56:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:24,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:25,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624072959] [2024-10-31 21:56:25,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624072959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212391687] [2024-10-31 21:56:25,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:25,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:25,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:25,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:25,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:56:25,156 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 21:56:25,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:25,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 21:56:25,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:25,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-10-31 21:56:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:56:25,472 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:56:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212391687] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:25,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:56:25,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-10-31 21:56:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598056546] [2024-10-31 21:56:25,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:25,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:56:25,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:56:25,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:56:25,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-10-31 21:56:25,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-10-31 21:56:25,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:25,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-10-31 21:56:25,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:26,660 INFO L124 PetriNetUnfolderBase]: 4429/6342 cut-off events. [2024-10-31 21:56:26,660 INFO L125 PetriNetUnfolderBase]: For 3105/3229 co-relation queries the response was YES. [2024-10-31 21:56:26,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6342 events. 4429/6342 cut-off events. For 3105/3229 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31580 event pairs, 1966 based on Foata normal form. 0/5671 useless extension candidates. Maximal degree in co-relation 12289. Up to 3995 conditions per place. [2024-10-31 21:56:26,706 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 77 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-10-31 21:56:26,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 471 flow [2024-10-31 21:56:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:56:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:56:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-10-31 21:56:26,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 21:56:26,709 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 163 flow. Second operand 6 states and 174 transitions. [2024-10-31 21:56:26,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 471 flow [2024-10-31 21:56:26,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 21:56:26,716 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 197 flow [2024-10-31 21:56:26,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-10-31 21:56:26,717 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2024-10-31 21:56:26,717 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 197 flow [2024-10-31 21:56:26,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-10-31 21:56:26,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:26,718 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:26,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:56:26,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:26,922 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:26,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash 140386399, now seen corresponding path program 1 times [2024-10-31 21:56:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:26,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000085090] [2024-10-31 21:56:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:27,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:27,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000085090] [2024-10-31 21:56:27,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000085090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:56:27,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:56:27,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:56:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446899065] [2024-10-31 21:56:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:56:27,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:56:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:56:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:56:27,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-10-31 21:56:27,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:27,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:27,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-10-31 21:56:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:28,254 INFO L124 PetriNetUnfolderBase]: 4070/6291 cut-off events. [2024-10-31 21:56:28,255 INFO L125 PetriNetUnfolderBase]: For 5358/5571 co-relation queries the response was YES. [2024-10-31 21:56:28,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16202 conditions, 6291 events. 4070/6291 cut-off events. For 5358/5571 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 34773 event pairs, 1771 based on Foata normal form. 22/6098 useless extension candidates. Maximal degree in co-relation 11971. Up to 3722 conditions per place. [2024-10-31 21:56:28,308 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 60 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-10-31 21:56:28,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 436 flow [2024-10-31 21:56:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:56:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:56:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-10-31 21:56:28,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5137931034482759 [2024-10-31 21:56:28,311 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 197 flow. Second operand 5 states and 149 transitions. [2024-10-31 21:56:28,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 436 flow [2024-10-31 21:56:28,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 414 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-10-31 21:56:28,330 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 216 flow [2024-10-31 21:56:28,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-10-31 21:56:28,335 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-10-31 21:56:28,335 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 216 flow [2024-10-31 21:56:28,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:28,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:28,335 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:28,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 21:56:28,336 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:28,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1910108667, now seen corresponding path program 1 times [2024-10-31 21:56:28,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:28,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257478856] [2024-10-31 21:56:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:28,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:28,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257478856] [2024-10-31 21:56:28,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257478856] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104473902] [2024-10-31 21:56:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:28,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:28,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:56:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:28,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 21:56:28,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:28,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:28,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104473902] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:28,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:28,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 21:56:28,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462404362] [2024-10-31 21:56:28,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:28,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:56:28,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:56:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:56:28,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:28,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:30,121 INFO L124 PetriNetUnfolderBase]: 4550/6843 cut-off events. [2024-10-31 21:56:30,121 INFO L125 PetriNetUnfolderBase]: For 6628/6928 co-relation queries the response was YES. [2024-10-31 21:56:30,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18985 conditions, 6843 events. 4550/6843 cut-off events. For 6628/6928 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 36198 event pairs, 2603 based on Foata normal form. 176/6977 useless extension candidates. Maximal degree in co-relation 15177. Up to 4992 conditions per place. [2024-10-31 21:56:30,170 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 89 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2024-10-31 21:56:30,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 108 transitions, 636 flow [2024-10-31 21:56:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-10-31 21:56:30,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5150862068965517 [2024-10-31 21:56:30,172 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 216 flow. Second operand 8 states and 239 transitions. [2024-10-31 21:56:30,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 108 transitions, 636 flow [2024-10-31 21:56:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:56:30,182 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 273 flow [2024-10-31 21:56:30,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-10-31 21:56:30,183 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-31 21:56:30,184 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 273 flow [2024-10-31 21:56:30,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:30,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:30,184 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:30,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:56:30,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:30,388 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:30,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash -221200747, now seen corresponding path program 2 times [2024-10-31 21:56:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:30,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407259982] [2024-10-31 21:56:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:30,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407259982] [2024-10-31 21:56:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407259982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662276711] [2024-10-31 21:56:30,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:30,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:30,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:56:30,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:56:30,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:30,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 21:56:30,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:30,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:31,032 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 24 treesize of output 20 [2024-10-31 21:56:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662276711] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:31,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:31,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-31 21:56:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292203521] [2024-10-31 21:56:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:31,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 21:56:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 21:56:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:56:31,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-10-31 21:56:31,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 273 flow. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:31,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:31,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-10-31 21:56:31,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:33,462 INFO L124 PetriNetUnfolderBase]: 5346/8019 cut-off events. [2024-10-31 21:56:33,462 INFO L125 PetriNetUnfolderBase]: For 9230/9774 co-relation queries the response was YES. [2024-10-31 21:56:33,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 8019 events. 5346/8019 cut-off events. For 9230/9774 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 43464 event pairs, 1275 based on Foata normal form. 274/8272 useless extension candidates. Maximal degree in co-relation 19380. Up to 2199 conditions per place. [2024-10-31 21:56:33,535 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 137 selfloop transitions, 14 changer transitions 0/160 dead transitions. [2024-10-31 21:56:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 160 transitions, 967 flow [2024-10-31 21:56:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:56:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 21:56:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 311 transitions. [2024-10-31 21:56:33,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362068965517242 [2024-10-31 21:56:33,538 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 273 flow. Second operand 10 states and 311 transitions. [2024-10-31 21:56:33,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 160 transitions, 967 flow [2024-10-31 21:56:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 160 transitions, 954 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-31 21:56:33,562 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 330 flow [2024-10-31 21:56:33,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=10, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-10-31 21:56:33,563 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-31 21:56:33,563 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 330 flow [2024-10-31 21:56:33,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:33,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:33,564 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:33,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 21:56:33,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:33,765 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:33,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1046020415, now seen corresponding path program 1 times [2024-10-31 21:56:33,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:33,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621607394] [2024-10-31 21:56:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:33,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:33,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:33,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621607394] [2024-10-31 21:56:33,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621607394] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:33,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010231146] [2024-10-31 21:56:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:33,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:34,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:34,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:56:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:34,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:56:34,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:34,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010231146] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:34,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:34,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 21:56:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588074326] [2024-10-31 21:56:34,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:34,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:56:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:56:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:56:34,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:34,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:34,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:34,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:36,280 INFO L124 PetriNetUnfolderBase]: 6186/8992 cut-off events. [2024-10-31 21:56:36,280 INFO L125 PetriNetUnfolderBase]: For 17815/18436 co-relation queries the response was YES. [2024-10-31 21:56:36,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28124 conditions, 8992 events. 6186/8992 cut-off events. For 17815/18436 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 45868 event pairs, 3675 based on Foata normal form. 232/9188 useless extension candidates. Maximal degree in co-relation 24570. Up to 7248 conditions per place. [2024-10-31 21:56:36,408 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 86 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-10-31 21:56:36,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 728 flow [2024-10-31 21:56:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:56:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:56:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-10-31 21:56:36,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-10-31 21:56:36,410 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 330 flow. Second operand 8 states and 236 transitions. [2024-10-31 21:56:36,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 728 flow [2024-10-31 21:56:36,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 682 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-10-31 21:56:36,453 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 363 flow [2024-10-31 21:56:36,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-10-31 21:56:36,454 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2024-10-31 21:56:36,454 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 363 flow [2024-10-31 21:56:36,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:36,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:36,455 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:36,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:56:36,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 21:56:36,656 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:36,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1609139379, now seen corresponding path program 1 times [2024-10-31 21:56:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002996747] [2024-10-31 21:56:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:36,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:36,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:36,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002996747] [2024-10-31 21:56:36,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002996747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:36,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520327683] [2024-10-31 21:56:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:36,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:36,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:36,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:36,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 21:56:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:36,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 21:56:36,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:37,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:56:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520327683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:37,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:37,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-31 21:56:37,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227309501] [2024-10-31 21:56:37,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:37,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 21:56:37,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:37,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 21:56:37,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-10-31 21:56:37,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-10-31 21:56:37,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:37,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:56:37,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-10-31 21:56:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:56:39,370 INFO L124 PetriNetUnfolderBase]: 9395/13906 cut-off events. [2024-10-31 21:56:39,370 INFO L125 PetriNetUnfolderBase]: For 27659/28273 co-relation queries the response was YES. [2024-10-31 21:56:39,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45497 conditions, 13906 events. 9395/13906 cut-off events. For 27659/28273 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 78530 event pairs, 4286 based on Foata normal form. 0/13731 useless extension candidates. Maximal degree in co-relation 25272. Up to 6944 conditions per place. [2024-10-31 21:56:39,468 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 140 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2024-10-31 21:56:39,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 162 transitions, 1221 flow [2024-10-31 21:56:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:56:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 21:56:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-10-31 21:56:39,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5191570881226054 [2024-10-31 21:56:39,470 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 363 flow. Second operand 9 states and 271 transitions. [2024-10-31 21:56:39,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 162 transitions, 1221 flow [2024-10-31 21:56:39,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 162 transitions, 1202 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-31 21:56:39,554 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 446 flow [2024-10-31 21:56:39,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=446, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-10-31 21:56:39,555 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 33 predicate places. [2024-10-31 21:56:39,556 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 446 flow [2024-10-31 21:56:39,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:56:39,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:56:39,556 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:56:39,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 21:56:39,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:39,757 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:56:39,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:56:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1911731175, now seen corresponding path program 2 times [2024-10-31 21:56:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:56:39,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063631013] [2024-10-31 21:56:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:56:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:56:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:56:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:40,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:56:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063631013] [2024-10-31 21:56:40,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063631013] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:56:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134043773] [2024-10-31 21:56:40,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:56:40,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:56:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:56:40,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:56:40,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2480f24d-6d92-4678-974a-5f38671459c1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 21:56:40,246 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:56:40,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:56:40,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 21:56:40,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:56:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:40,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:56:41,001 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 35 treesize of output 31 [2024-10-31 21:56:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:56:41,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134043773] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:56:41,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:56:41,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-10-31 21:56:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366296976] [2024-10-31 21:56:41,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:56:41,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 21:56:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:56:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 21:56:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380