./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.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_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/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_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/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_f3068f01-46cd-4e06-84f1-76036198d120/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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:21,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:21,452 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:00:21,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:21,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:21,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:21,488 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:21,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:21,489 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:21,490 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:21,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:21,492 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:21,493 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:21,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:21,496 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:21,497 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:21,497 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:21,498 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:21,498 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:21,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:21,498 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:00:21,499 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:00:21,499 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:00:21,500 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:21,500 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:00:21,500 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:21,501 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:00:21,501 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:21,501 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:21,502 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:21,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:21,502 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:21,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:21,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:21,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:21,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:21,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:21,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:21,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:21,504 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:21,505 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:21,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:21,505 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_f3068f01-46cd-4e06-84f1-76036198d120/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-10-31 22:00:21,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:21,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:21,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:21,821 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:21,822 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:21,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c Unable to find full path for "g++" [2024-10-31 22:00:24,087 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:24,298 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:24,298 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-10-31 22:00:24,310 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/data/8346731b4/1105f3b9aeff4087834a1f03eb603efa/FLAG58b99a9e5 [2024-10-31 22:00:24,341 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/data/8346731b4/1105f3b9aeff4087834a1f03eb603efa [2024-10-31 22:00:24,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:24,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:24,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:24,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:24,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:24,372 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72cf0099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24, skipping insertion in model container [2024-10-31 22:00:24,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,433 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:24,713 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 22:00:24,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:24,745 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:24,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:24,817 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:24,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24 WrapperNode [2024-10-31 22:00:24,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:24,820 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:24,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:24,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:24,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,890 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 193 [2024-10-31 22:00:24,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:24,892 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:24,892 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:24,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:24,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,941 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:00:24,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:24,985 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:24,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:24,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:24,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (1/1) ... [2024-10-31 22:00:24,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:25,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:25,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:25,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:25,082 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:00:25,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:00:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:00:25,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:00:25,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:25,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:00:25,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:00:25,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:00:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:00:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:25,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:00:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:00:25,114 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 22:00:25,344 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:25,351 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:25,930 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:00:25,931 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:26,418 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:26,418 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:00:26,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:26 BoogieIcfgContainer [2024-10-31 22:00:26,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:26,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:26,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:26,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:26,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:24" (1/3) ... [2024-10-31 22:00:26,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44464c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:26, skipping insertion in model container [2024-10-31 22:00:26,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:24" (2/3) ... [2024-10-31 22:00:26,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44464c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:26, skipping insertion in model container [2024-10-31 22:00:26,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:26" (3/3) ... [2024-10-31 22:00:26,432 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-10-31 22:00:26,452 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:26,452 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-31 22:00:26,453 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:00:26,524 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:00:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-10-31 22:00:26,608 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-10-31 22:00:26,608 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:00:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-10-31 22:00:26,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-10-31 22:00:26,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-10-31 22:00:26,634 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:26,643 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;@7c89d173, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:26,645 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-31 22:00:26,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:00:26,649 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:00:26,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:00:26,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:26,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:26,651 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:26,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 664973, now seen corresponding path program 1 times [2024-10-31 22:00:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:26,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018136585] [2024-10-31 22:00:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:26,990 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 22:00:26,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:26,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018136585] [2024-10-31 22:00:26,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018136585] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:26,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:26,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:00:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92563159] [2024-10-31 22:00:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:27,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:27,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:27,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-10-31 22:00:27,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 22:00:27,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:27,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-10-31 22:00:27,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:27,218 INFO L124 PetriNetUnfolderBase]: 39/124 cut-off events. [2024-10-31 22:00:27,219 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:00:27,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 124 events. 39/124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 488 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 168. Up to 68 conditions per place. [2024-10-31 22:00:27,222 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-10-31 22:00:27,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 122 flow [2024-10-31 22:00:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-31 22:00:27,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-31 22:00:27,241 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 77 transitions. [2024-10-31 22:00:27,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 122 flow [2024-10-31 22:00:27,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:27,276 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-10-31 22:00:27,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-10-31 22:00:27,287 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-10-31 22:00:27,288 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-10-31 22:00:27,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 22:00:27,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:27,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:27,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:27,289 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:27,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash 664974, now seen corresponding path program 1 times [2024-10-31 22:00:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:27,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133584272] [2024-10-31 22:00:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:27,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:27,639 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 22:00:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:27,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133584272] [2024-10-31 22:00:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133584272] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:27,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:27,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73879223] [2024-10-31 22:00:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:27,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:27,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-10-31 22:00:27,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 22:00:27,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:27,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-10-31 22:00:27,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:27,877 INFO L124 PetriNetUnfolderBase]: 41/130 cut-off events. [2024-10-31 22:00:27,877 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:00:27,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 130 events. 41/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 507 event pairs, 22 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 185. Up to 77 conditions per place. [2024-10-31 22:00:27,879 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-10-31 22:00:27,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 148 flow [2024-10-31 22:00:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-10-31 22:00:27,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-31 22:00:27,884 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 3 states and 84 transitions. [2024-10-31 22:00:27,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 148 flow [2024-10-31 22:00:27,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:27,888 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 114 flow [2024-10-31 22:00:27,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-10-31 22:00:27,890 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-10-31 22:00:27,890 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 114 flow [2024-10-31 22:00:27,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 22:00:27,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:27,891 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:00:27,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:00:27,892 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:27,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 639061118, now seen corresponding path program 1 times [2024-10-31 22:00:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092203257] [2024-10-31 22:00:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:28,228 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 22:00:28,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092203257] [2024-10-31 22:00:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092203257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:28,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615141275] [2024-10-31 22:00:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:28,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:28,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:28,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:00:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:28,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:00:28,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:28,459 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 6 treesize of output 5 [2024-10-31 22:00:28,545 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 22:00:28,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:28,657 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 22:00:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615141275] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:28,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-31 22:00:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324197885] [2024-10-31 22:00:28,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:28,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:00:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:00:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:00:28,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-10-31 22:00:28,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 114 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 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 22:00:28,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:28,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-10-31 22:00:28,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:29,359 INFO L124 PetriNetUnfolderBase]: 43/144 cut-off events. [2024-10-31 22:00:29,359 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:00:29,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 144 events. 43/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 522 event pairs, 22 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 217. Up to 78 conditions per place. [2024-10-31 22:00:29,361 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-10-31 22:00:29,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 248 flow [2024-10-31 22:00:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-10-31 22:00:29,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-10-31 22:00:29,367 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 114 flow. Second operand 6 states and 160 transitions. [2024-10-31 22:00:29,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 248 flow [2024-10-31 22:00:29,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:29,371 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 198 flow [2024-10-31 22:00:29,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-10-31 22:00:29,372 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-10-31 22:00:29,372 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 198 flow [2024-10-31 22:00:29,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 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 22:00:29,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:29,374 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-31 22:00:29,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:00:29,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-31 22:00:29,575 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:29,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash -425273010, now seen corresponding path program 2 times [2024-10-31 22:00:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292764319] [2024-10-31 22:00:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:29,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:30,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:30,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292764319] [2024-10-31 22:00:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292764319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926216776] [2024-10-31 22:00:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:00:30,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:30,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:30,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:30,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:00:30,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:00:30,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:00:30,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:00:30,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:30,291 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 6 treesize of output 5 [2024-10-31 22:00:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:30,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926216776] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:31,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:31,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-10-31 22:00:31,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844428913] [2024-10-31 22:00:31,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:31,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:00:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:00:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:00:31,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-10-31 22:00:31,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 198 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 22:00:31,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:31,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-10-31 22:00:31,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:32,270 INFO L124 PetriNetUnfolderBase]: 39/140 cut-off events. [2024-10-31 22:00:32,271 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-31 22:00:32,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 140 events. 39/140 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 481 event pairs, 22 based on Foata normal form. 8/120 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2024-10-31 22:00:32,273 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 23 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2024-10-31 22:00:32,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 246 flow [2024-10-31 22:00:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:00:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:00:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-10-31 22:00:32,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-10-31 22:00:32,276 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 198 flow. Second operand 8 states and 190 transitions. [2024-10-31 22:00:32,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 246 flow [2024-10-31 22:00:32,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 208 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-10-31 22:00:32,279 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 156 flow [2024-10-31 22:00:32,279 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-10-31 22:00:32,280 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-10-31 22:00:32,280 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 156 flow [2024-10-31 22:00:32,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 22:00:32,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:32,281 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:32,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:32,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:32,483 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:32,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709676, now seen corresponding path program 1 times [2024-10-31 22:00:32,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:32,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233065649] [2024-10-31 22:00:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:32,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-31 22:00:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:32,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233065649] [2024-10-31 22:00:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233065649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:32,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757241947] [2024-10-31 22:00:32,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:32,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:32,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-10-31 22:00:32,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 22:00:32,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:32,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-10-31 22:00:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:32,913 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2024-10-31 22:00:32,913 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-31 22:00:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 159 events. 50/159 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 570 event pairs, 31 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 224. Up to 86 conditions per place. [2024-10-31 22:00:32,915 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 28 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-10-31 22:00:32,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 214 flow [2024-10-31 22:00:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-10-31 22:00:32,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-10-31 22:00:32,917 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 156 flow. Second operand 5 states and 98 transitions. [2024-10-31 22:00:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 214 flow [2024-10-31 22:00:32,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-31 22:00:32,919 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 130 flow [2024-10-31 22:00:32,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-10-31 22:00:32,920 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-10-31 22:00:32,920 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 130 flow [2024-10-31 22:00:32,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 22:00:32,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:32,921 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:32,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:00:32,922 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:32,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709675, now seen corresponding path program 1 times [2024-10-31 22:00:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:32,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965244830] [2024-10-31 22:00:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:32,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 22:00:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965244830] [2024-10-31 22:00:33,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965244830] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:33,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871537318] [2024-10-31 22:00:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:33,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:33,437 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:33,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:00:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:33,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 22:00:33,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:33,581 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 6 treesize of output 5 [2024-10-31 22:00:33,588 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 22:00:33,746 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:00:33,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-31 22:00:33,773 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:00:33,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:00:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:34,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:34,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871537318] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:34,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:00:34,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2024-10-31 22:00:34,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070004448] [2024-10-31 22:00:34,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:34,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:00:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:00:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:00:35,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-10-31 22:00:35,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 130 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 22:00:35,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:35,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-10-31 22:00:35,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:35,360 INFO L124 PetriNetUnfolderBase]: 86/233 cut-off events. [2024-10-31 22:00:35,360 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:00:35,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 233 events. 86/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 919 event pairs, 31 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 366. Up to 78 conditions per place. [2024-10-31 22:00:35,362 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-10-31 22:00:35,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 241 flow [2024-10-31 22:00:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-10-31 22:00:35,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-10-31 22:00:35,365 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 130 flow. Second operand 6 states and 142 transitions. [2024-10-31 22:00:35,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 241 flow [2024-10-31 22:00:35,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:35,368 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 150 flow [2024-10-31 22:00:35,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-10-31 22:00:35,369 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-10-31 22:00:35,369 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 150 flow [2024-10-31 22:00:35,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 22:00:35,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:35,369 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:35,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:00:35,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:35,570 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:35,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash -965391780, now seen corresponding path program 1 times [2024-10-31 22:00:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:35,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807837808] [2024-10-31 22:00:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:35,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-31 22:00:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:35,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807837808] [2024-10-31 22:00:35,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807837808] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:35,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:35,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493364456] [2024-10-31 22:00:35,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:35,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:35,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:35,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:35,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-10-31 22:00:35,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 22:00:35,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:35,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-10-31 22:00:35,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:35,823 INFO L124 PetriNetUnfolderBase]: 73/200 cut-off events. [2024-10-31 22:00:35,823 INFO L125 PetriNetUnfolderBase]: For 67/72 co-relation queries the response was YES. [2024-10-31 22:00:35,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 200 events. 73/200 cut-off events. For 67/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 730 event pairs, 57 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 360. Up to 132 conditions per place. [2024-10-31 22:00:35,825 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-10-31 22:00:35,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 208 flow [2024-10-31 22:00:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-10-31 22:00:35,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-10-31 22:00:35,826 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 150 flow. Second operand 4 states and 83 transitions. [2024-10-31 22:00:35,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 208 flow [2024-10-31 22:00:35,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:35,829 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 142 flow [2024-10-31 22:00:35,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-31 22:00:35,830 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-10-31 22:00:35,830 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 142 flow [2024-10-31 22:00:35,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 22:00:35,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:35,831 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:35,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:00:35,831 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:35,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -965391779, now seen corresponding path program 1 times [2024-10-31 22:00:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:35,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537075132] [2024-10-31 22:00:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 22:00:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:36,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537075132] [2024-10-31 22:00:36,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537075132] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777686853] [2024-10-31 22:00:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:36,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:36,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:36,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:36,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:00:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:00:36,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:36,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:36,632 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 22:00:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777686853] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:36,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-10-31 22:00:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734102563] [2024-10-31 22:00:36,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:36,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:00:36,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:36,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:00:36,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:00:37,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-10-31 22:00:37,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 142 flow. Second operand has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 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 22:00:37,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:37,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-10-31 22:00:37,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:38,006 INFO L124 PetriNetUnfolderBase]: 100/275 cut-off events. [2024-10-31 22:00:38,006 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-31 22:00:38,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 275 events. 100/275 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1069 event pairs, 31 based on Foata normal form. 16/274 useless extension candidates. Maximal degree in co-relation 520. Up to 86 conditions per place. [2024-10-31 22:00:38,011 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-10-31 22:00:38,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 352 flow [2024-10-31 22:00:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:00:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:00:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-10-31 22:00:38,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-10-31 22:00:38,013 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 142 flow. Second operand 10 states and 251 transitions. [2024-10-31 22:00:38,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 352 flow [2024-10-31 22:00:38,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:38,021 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 187 flow [2024-10-31 22:00:38,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-10-31 22:00:38,022 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-10-31 22:00:38,022 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 187 flow [2024-10-31 22:00:38,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 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 22:00:38,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:38,023 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:38,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:38,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:38,224 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:38,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 114216719, now seen corresponding path program 1 times [2024-10-31 22:00:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:38,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260420449] [2024-10-31 22:00:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:38,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 22:00:38,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:38,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260420449] [2024-10-31 22:00:38,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260420449] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:38,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644450661] [2024-10-31 22:00:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:38,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:38,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:38,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:00:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:38,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:00:38,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:38,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:39,040 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 22:00:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:39,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644450661] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:39,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:39,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-10-31 22:00:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493754645] [2024-10-31 22:00:39,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:39,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:00:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:00:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:00:39,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-10-31 22:00:39,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 187 flow. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 22:00:39,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:39,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-10-31 22:00:39,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:40,164 INFO L124 PetriNetUnfolderBase]: 257/591 cut-off events. [2024-10-31 22:00:40,164 INFO L125 PetriNetUnfolderBase]: For 504/521 co-relation queries the response was YES. [2024-10-31 22:00:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 591 events. 257/591 cut-off events. For 504/521 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2876 event pairs, 84 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1331. Up to 183 conditions per place. [2024-10-31 22:00:40,169 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-10-31 22:00:40,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 447 flow [2024-10-31 22:00:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:00:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:00:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-10-31 22:00:40,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-10-31 22:00:40,171 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 187 flow. Second operand 10 states and 239 transitions. [2024-10-31 22:00:40,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 447 flow [2024-10-31 22:00:40,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:00:40,174 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 215 flow [2024-10-31 22:00:40,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-10-31 22:00:40,175 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-10-31 22:00:40,175 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 215 flow [2024-10-31 22:00:40,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 22:00:40,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:40,176 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:40,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:00:40,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:40,380 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:40,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -754248404, now seen corresponding path program 1 times [2024-10-31 22:00:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500857727] [2024-10-31 22:00:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 22:00:40,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500857727] [2024-10-31 22:00:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500857727] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021416089] [2024-10-31 22:00:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:40,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:40,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:40,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:40,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:00:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:40,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-31 22:00:40,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:40,947 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 6 treesize of output 5 [2024-10-31 22:00:41,041 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-31 22:00:41,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-31 22:00:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:41,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:41,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021416089] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:41,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:00:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2024-10-31 22:00:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425198953] [2024-10-31 22:00:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:41,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:00:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:00:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:00:42,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-10-31 22:00:42,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 22:00:42,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:42,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-10-31 22:00:42,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:42,407 INFO L124 PetriNetUnfolderBase]: 206/514 cut-off events. [2024-10-31 22:00:42,407 INFO L125 PetriNetUnfolderBase]: For 547/560 co-relation queries the response was YES. [2024-10-31 22:00:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 514 events. 206/514 cut-off events. For 547/560 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2498 event pairs, 128 based on Foata normal form. 17/519 useless extension candidates. Maximal degree in co-relation 1292. Up to 271 conditions per place. [2024-10-31 22:00:42,412 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-10-31 22:00:42,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 349 flow [2024-10-31 22:00:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-10-31 22:00:42,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-10-31 22:00:42,414 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 215 flow. Second operand 6 states and 145 transitions. [2024-10-31 22:00:42,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 349 flow [2024-10-31 22:00:42,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:00:42,418 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 208 flow [2024-10-31 22:00:42,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-10-31 22:00:42,419 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-10-31 22:00:42,420 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 208 flow [2024-10-31 22:00:42,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 22:00:42,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:42,420 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:42,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:00:42,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:42,621 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:42,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash -28541918, now seen corresponding path program 1 times [2024-10-31 22:00:42,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:42,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027936127] [2024-10-31 22:00:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:42,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 22:00:43,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:43,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027936127] [2024-10-31 22:00:43,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027936127] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295792961] [2024-10-31 22:00:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:43,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:43,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:00:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:43,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-31 22:00:43,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:43,317 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 6 treesize of output 5 [2024-10-31 22:00:43,391 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-31 22:00:43,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-31 22:00:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:43,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:44,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295792961] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:44,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:44,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-10-31 22:00:44,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157908274] [2024-10-31 22:00:44,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:44,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 22:00:44,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 22:00:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2024-10-31 22:00:45,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-10-31 22:00:45,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 208 flow. Second operand has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 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 22:00:45,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:45,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-10-31 22:00:45,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:46,408 INFO L124 PetriNetUnfolderBase]: 376/879 cut-off events. [2024-10-31 22:00:46,408 INFO L125 PetriNetUnfolderBase]: For 1183/1208 co-relation queries the response was YES. [2024-10-31 22:00:46,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 879 events. 376/879 cut-off events. For 1183/1208 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4732 event pairs, 75 based on Foata normal form. 48/917 useless extension candidates. Maximal degree in co-relation 2345. Up to 153 conditions per place. [2024-10-31 22:00:46,416 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 76 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-10-31 22:00:46,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 655 flow [2024-10-31 22:00:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:00:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-31 22:00:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 375 transitions. [2024-10-31 22:00:46,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-10-31 22:00:46,419 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 208 flow. Second operand 20 states and 375 transitions. [2024-10-31 22:00:46,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 655 flow [2024-10-31 22:00:46,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 627 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:00:46,424 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 297 flow [2024-10-31 22:00:46,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=297, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2024-10-31 22:00:46,426 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-10-31 22:00:46,426 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 297 flow [2024-10-31 22:00:46,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 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 22:00:46,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:46,426 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:46,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:00:46,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:46,627 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:46,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1455373354, now seen corresponding path program 1 times [2024-10-31 22:00:46,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:46,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780479077] [2024-10-31 22:00:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-10-31 22:00:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780479077] [2024-10-31 22:00:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780479077] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263055777] [2024-10-31 22:00:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:47,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:47,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:00:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:47,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-31 22:00:47,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:47,355 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 22:00:47,359 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 6 treesize of output 5 [2024-10-31 22:00:47,479 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:00:47,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-31 22:00:47,497 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:00:47,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:00:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:48,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263055777] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:48,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:48,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-10-31 22:00:48,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774492310] [2024-10-31 22:00:48,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:48,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 22:00:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 22:00:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-10-31 22:00:49,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-10-31 22:00:49,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 297 flow. Second operand has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 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 22:00:49,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:49,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-10-31 22:00:49,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:50,691 INFO L124 PetriNetUnfolderBase]: 458/1266 cut-off events. [2024-10-31 22:00:50,691 INFO L125 PetriNetUnfolderBase]: For 2146/2188 co-relation queries the response was YES. [2024-10-31 22:00:50,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1266 events. 458/1266 cut-off events. For 2146/2188 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8053 event pairs, 138 based on Foata normal form. 81/1329 useless extension candidates. Maximal degree in co-relation 3532. Up to 306 conditions per place. [2024-10-31 22:00:50,704 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-10-31 22:00:50,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 795 flow [2024-10-31 22:00:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:00:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-31 22:00:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-10-31 22:00:50,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-10-31 22:00:50,707 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 297 flow. Second operand 13 states and 289 transitions. [2024-10-31 22:00:50,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 795 flow [2024-10-31 22:00:50,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 726 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-10-31 22:00:50,712 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 326 flow [2024-10-31 22:00:50,713 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=326, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-10-31 22:00:50,715 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-10-31 22:00:50,715 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 326 flow [2024-10-31 22:00:50,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 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 22:00:50,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:50,716 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:50,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:00:50,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:00:50,920 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:50,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash -827986563, now seen corresponding path program 1 times [2024-10-31 22:00:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954597606] [2024-10-31 22:00:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-31 22:00:51,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954597606] [2024-10-31 22:00:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954597606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759121100] [2024-10-31 22:00:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:51,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:51,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:51,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:51,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3068f01-46cd-4e06-84f1-76036198d120/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:00:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:51,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 22:00:51,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 22:00:51,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:52,006 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