./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/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_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/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_00cfd594-6c84-44f5-b287-f7e612a7ddaf/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 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:06:32,415 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:06:32,498 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:06:32,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:06:32,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:06:32,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:06:32,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:06:32,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:06:32,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:06:32,548 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:06:32,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:06:32,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:06:32,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:06:32,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:06:32,551 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:06:32,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:06:32,552 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:06:32,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:06:32,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:06:32,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:06:32,557 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:06:32,558 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:06:32,558 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:06:32,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:06:32,559 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:06:32,559 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:06:32,559 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:06:32,560 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:06:32,560 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:06:32,560 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:06:32,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:06:32,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:06:32,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:06:32,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:32,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:06:32,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:06:32,563 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:06:32,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:06:32,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:06:32,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:06:32,567 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:06:32,568 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:06:32,568 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_00cfd594-6c84-44f5-b287-f7e612a7ddaf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 [2024-10-31 22:06:32,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:06:32,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:06:32,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:06:32,969 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:06:32,970 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:06:32,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c Unable to find full path for "g++" [2024-10-31 22:06:35,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:06:35,311 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:06:35,312 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-31 22:06:35,326 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/data/a47c5dc93/7570558995aa4f33b70d9341e066cd8c/FLAGb158b8372 [2024-10-31 22:06:35,344 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/data/a47c5dc93/7570558995aa4f33b70d9341e066cd8c [2024-10-31 22:06:35,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:06:35,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:06:35,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:35,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:06:35,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:06:35,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5175ede2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35, skipping insertion in model container [2024-10-31 22:06:35,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,381 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:06:35,675 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 22:06:35,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:35,686 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:06:35,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:35,729 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:06:35,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35 WrapperNode [2024-10-31 22:06:35,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:35,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:35,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:06:35,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:06:35,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,768 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 119 [2024-10-31 22:06:35,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:35,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:06:35,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:06:35,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:06:35,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,785 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,806 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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 22:06:35,806 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,806 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,828 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,831 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:06:35,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:06:35,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:06:35,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:06:35,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (1/1) ... [2024-10-31 22:06:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:35,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:35,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:06:35,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:06:35,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:06:35,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:06:35,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:06:35,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:06:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:06:35,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:06:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:06:35,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-31 22:06:35,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-31 22:06:35,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:06:35,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:06:35,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:06:35,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:06:35,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:06:35,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:06:35,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:06:35,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:06:35,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:06:35,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:06:35,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:06:35,913 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 22:06:36,078 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:06:36,081 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:06:36,485 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:06:36,485 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:06:36,847 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:06:36,848 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:06:36,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:36 BoogieIcfgContainer [2024-10-31 22:06:36,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:06:36,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:06:36,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:06:36,859 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:06:36,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:06:35" (1/3) ... [2024-10-31 22:06:36,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1abf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:36, skipping insertion in model container [2024-10-31 22:06:36,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:35" (2/3) ... [2024-10-31 22:06:36,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1abf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:36, skipping insertion in model container [2024-10-31 22:06:36,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:36" (3/3) ... [2024-10-31 22:06:36,863 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2024-10-31 22:06:36,884 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:06:36,885 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-31 22:06:36,885 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:06:36,979 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-31 22:06:37,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 166 flow [2024-10-31 22:06:37,053 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2024-10-31 22:06:37,053 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:06:37,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 65 events. 4/65 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 214 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-10-31 22:06:37,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 69 transitions, 166 flow [2024-10-31 22:06:37,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 64 transitions, 152 flow [2024-10-31 22:06:37,080 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:06:37,087 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;@29652720, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:06:37,088 INFO L334 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2024-10-31 22:06:37,092 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:06:37,093 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:06:37,093 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:06:37,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:37,094 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:37,094 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:37,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 553346, now seen corresponding path program 1 times [2024-10-31 22:06:37,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:37,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229446934] [2024-10-31 22:06:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:37,447 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 22:06:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229446934] [2024-10-31 22:06:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229446934] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:37,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:37,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:06:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763214378] [2024-10-31 22:06:37,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:37,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:37,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:37,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:37,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 152 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 22:06:37,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:37,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:37,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:39,999 INFO L124 PetriNetUnfolderBase]: 11431/16154 cut-off events. [2024-10-31 22:06:39,999 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-10-31 22:06:40,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32082 conditions, 16154 events. 11431/16154 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 108936 event pairs, 8159 based on Foata normal form. 1/10221 useless extension candidates. Maximal degree in co-relation 31041. Up to 14643 conditions per place. [2024-10-31 22:06:40,181 INFO L140 encePairwiseOnDemand]: 57/69 looper letters, 38 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-31 22:06:40,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 210 flow [2024-10-31 22:06:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-31 22:06:40,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5024154589371981 [2024-10-31 22:06:40,200 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 152 flow. Second operand 3 states and 104 transitions. [2024-10-31 22:06:40,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 210 flow [2024-10-31 22:06:40,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 194 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-31 22:06:40,307 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 118 flow [2024-10-31 22:06:40,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-10-31 22:06:40,317 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -17 predicate places. [2024-10-31 22:06:40,317 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 118 flow [2024-10-31 22:06:40,318 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 22:06:40,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:40,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:40,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:06:40,320 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:40,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash 553347, now seen corresponding path program 1 times [2024-10-31 22:06:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:40,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490954418] [2024-10-31 22:06:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:40,801 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 22:06:40,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:40,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490954418] [2024-10-31 22:06:40,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490954418] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:40,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:40,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:40,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955891536] [2024-10-31 22:06:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:40,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:40,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:40,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 118 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 22:06:40,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:40,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:40,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:42,569 INFO L124 PetriNetUnfolderBase]: 11432/16157 cut-off events. [2024-10-31 22:06:42,569 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-31 22:06:42,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31389 conditions, 16157 events. 11432/16157 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 108903 event pairs, 8159 based on Foata normal form. 0/10223 useless extension candidates. Maximal degree in co-relation 31367. Up to 14648 conditions per place. [2024-10-31 22:06:42,758 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 41 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-10-31 22:06:42,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 214 flow [2024-10-31 22:06:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-10-31 22:06:42,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-10-31 22:06:42,761 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 118 flow. Second operand 3 states and 99 transitions. [2024-10-31 22:06:42,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 214 flow [2024-10-31 22:06:42,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:42,766 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 133 flow [2024-10-31 22:06:42,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-10-31 22:06:42,769 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -16 predicate places. [2024-10-31 22:06:42,770 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 133 flow [2024-10-31 22:06:42,770 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 22:06:42,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:42,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:06:42,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:06:42,773 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:42,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash 531878182, now seen corresponding path program 1 times [2024-10-31 22:06:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:42,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006101423] [2024-10-31 22:06:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:42,892 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 22:06:42,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:42,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006101423] [2024-10-31 22:06:42,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006101423] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:42,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713008033] [2024-10-31 22:06:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:42,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:42,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-31 22:06:42,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 22:06:42,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:42,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-31 22:06:42,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:44,700 INFO L124 PetriNetUnfolderBase]: 11431/16156 cut-off events. [2024-10-31 22:06:44,701 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-31 22:06:44,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31390 conditions, 16156 events. 11431/16156 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 108972 event pairs, 8159 based on Foata normal form. 1/10224 useless extension candidates. Maximal degree in co-relation 31377. Up to 14646 conditions per place. [2024-10-31 22:06:44,842 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 40 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-10-31 22:06:44,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 214 flow [2024-10-31 22:06:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-10-31 22:06:44,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4830917874396135 [2024-10-31 22:06:44,848 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 133 flow. Second operand 3 states and 100 transitions. [2024-10-31 22:06:44,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 214 flow [2024-10-31 22:06:44,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:06:44,852 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 130 flow [2024-10-31 22:06:44,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-10-31 22:06:44,854 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -15 predicate places. [2024-10-31 22:06:44,855 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 130 flow [2024-10-31 22:06:44,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 22:06:44,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:44,856 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:06:44,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:06:44,856 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:44,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 531784537, now seen corresponding path program 1 times [2024-10-31 22:06:44,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:44,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589426422] [2024-10-31 22:06:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:44,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:45,157 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 22:06:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589426422] [2024-10-31 22:06:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589426422] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:45,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341129568] [2024-10-31 22:06:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:45,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:45,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:45,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:06:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:45,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:06:45,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:45,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:06:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:45,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:46,016 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 22:06:46,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341129568] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:46,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:46,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:06:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462093886] [2024-10-31 22:06:46,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:46,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:06:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:06:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:06:46,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:46,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 130 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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 22:06:46,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:46,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:46,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:47,957 INFO L124 PetriNetUnfolderBase]: 11431/16155 cut-off events. [2024-10-31 22:06:47,957 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-31 22:06:47,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31389 conditions, 16155 events. 11431/16155 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 108954 event pairs, 8159 based on Foata normal form. 0/10222 useless extension candidates. Maximal degree in co-relation 31375. Up to 14643 conditions per place. [2024-10-31 22:06:48,066 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 37 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-10-31 22:06:48,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 212 flow [2024-10-31 22:06:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-10-31 22:06:48,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3855072463768116 [2024-10-31 22:06:48,070 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 130 flow. Second operand 5 states and 133 transitions. [2024-10-31 22:06:48,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 212 flow [2024-10-31 22:06:48,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:48,073 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 140 flow [2024-10-31 22:06:48,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-10-31 22:06:48,075 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -13 predicate places. [2024-10-31 22:06:48,076 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 140 flow [2024-10-31 22:06:48,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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 22:06:48,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:48,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:48,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:06:48,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:48,277 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:48,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -56056452, now seen corresponding path program 1 times [2024-10-31 22:06:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:48,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423862749] [2024-10-31 22:06:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:48,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423862749] [2024-10-31 22:06:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423862749] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:48,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:06:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898510550] [2024-10-31 22:06:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:48,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:48,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:48,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:48,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 22:06:48,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:48,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:48,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:49,223 INFO L124 PetriNetUnfolderBase]: 5706/8206 cut-off events. [2024-10-31 22:06:49,223 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-10-31 22:06:49,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15895 conditions, 8206 events. 5706/8206 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 51694 event pairs, 4029 based on Foata normal form. 0/6106 useless extension candidates. Maximal degree in co-relation 15866. Up to 7365 conditions per place. [2024-10-31 22:06:49,284 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 35 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-10-31 22:06:49,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 204 flow [2024-10-31 22:06:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:06:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:06:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-31 22:06:49,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-10-31 22:06:49,287 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 140 flow. Second operand 4 states and 112 transitions. [2024-10-31 22:06:49,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 204 flow [2024-10-31 22:06:49,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 194 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:49,293 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 124 flow [2024-10-31 22:06:49,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-10-31 22:06:49,294 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -18 predicate places. [2024-10-31 22:06:49,295 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 124 flow [2024-10-31 22:06:49,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 22:06:49,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:49,296 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:49,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:06:49,296 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:49,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash -56056451, now seen corresponding path program 1 times [2024-10-31 22:06:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:49,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922878236] [2024-10-31 22:06:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:49,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:49,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922878236] [2024-10-31 22:06:49,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922878236] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:49,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914455715] [2024-10-31 22:06:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:49,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:49,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:49,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:06:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:49,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:06:49,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:49,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:49,722 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 22:06:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:49,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914455715] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:49,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-31 22:06:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189096358] [2024-10-31 22:06:49,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:49,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:06:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:06:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:06:49,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-31 22:06:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 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 22:06:49,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:49,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-31 22:06:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:50,523 INFO L124 PetriNetUnfolderBase]: 4333/6218 cut-off events. [2024-10-31 22:06:50,523 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:06:50,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12024 conditions, 6218 events. 4333/6218 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37743 event pairs, 2926 based on Foata normal form. 0/4882 useless extension candidates. Maximal degree in co-relation 11999. Up to 5565 conditions per place. [2024-10-31 22:06:50,570 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 32 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-10-31 22:06:50,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 190 flow [2024-10-31 22:06:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-10-31 22:06:50,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3826086956521739 [2024-10-31 22:06:50,572 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 124 flow. Second operand 5 states and 132 transitions. [2024-10-31 22:06:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 190 flow [2024-10-31 22:06:50,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:50,574 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 123 flow [2024-10-31 22:06:50,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-10-31 22:06:50,575 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -18 predicate places. [2024-10-31 22:06:50,576 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 123 flow [2024-10-31 22:06:50,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 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 22:06:50,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:50,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:50,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:06:50,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:50,782 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:50,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:50,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2050947966, now seen corresponding path program 1 times [2024-10-31 22:06:50,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:50,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693911594] [2024-10-31 22:06:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:50,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:50,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:50,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693911594] [2024-10-31 22:06:50,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693911594] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:50,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:50,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:06:50,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461341275] [2024-10-31 22:06:50,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:50,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:50,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:50,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:50,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:50,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 22:06:50,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:50,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:51,839 INFO L124 PetriNetUnfolderBase]: 4700/6999 cut-off events. [2024-10-31 22:06:51,839 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-10-31 22:06:51,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13477 conditions, 6999 events. 4700/6999 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41901 event pairs, 799 based on Foata normal form. 0/6119 useless extension candidates. Maximal degree in co-relation 13450. Up to 4518 conditions per place. [2024-10-31 22:06:51,891 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 63 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-10-31 22:06:51,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 82 transitions, 341 flow [2024-10-31 22:06:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:06:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:06:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-10-31 22:06:51,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2024-10-31 22:06:51,893 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 123 flow. Second operand 6 states and 178 transitions. [2024-10-31 22:06:51,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 82 transitions, 341 flow [2024-10-31 22:06:51,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:51,896 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 163 flow [2024-10-31 22:06:51,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-10-31 22:06:51,897 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2024-10-31 22:06:51,898 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 163 flow [2024-10-31 22:06:51,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 22:06:51,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:51,898 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:51,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:06:51,899 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:51,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1188032202, now seen corresponding path program 1 times [2024-10-31 22:06:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:51,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209935524] [2024-10-31 22:06:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209935524] [2024-10-31 22:06:52,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209935524] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:52,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516434355] [2024-10-31 22:06:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:52,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:52,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:52,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:52,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:06:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:52,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:06:52,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:52,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:52,478 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 22:06:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:52,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516434355] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:52,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:52,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-31 22:06:52,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919207637] [2024-10-31 22:06:52,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:52,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:06:52,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:52,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:06:52,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:06:52,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-31 22:06:52,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 163 flow. Second operand has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 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 22:06:52,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:52,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-31 22:06:52,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:53,584 INFO L124 PetriNetUnfolderBase]: 6880/9558 cut-off events. [2024-10-31 22:06:53,584 INFO L125 PetriNetUnfolderBase]: For 2121/2644 co-relation queries the response was YES. [2024-10-31 22:06:53,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21809 conditions, 9558 events. 6880/9558 cut-off events. For 2121/2644 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 56062 event pairs, 2211 based on Foata normal form. 789/9443 useless extension candidates. Maximal degree in co-relation 21780. Up to 5309 conditions per place. [2024-10-31 22:06:53,656 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 73 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2024-10-31 22:06:53,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 453 flow [2024-10-31 22:06:53,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:06:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:06:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-10-31 22:06:53,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.422360248447205 [2024-10-31 22:06:53,659 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 163 flow. Second operand 7 states and 204 transitions. [2024-10-31 22:06:53,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 453 flow [2024-10-31 22:06:53,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:53,665 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 193 flow [2024-10-31 22:06:53,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-10-31 22:06:53,668 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2024-10-31 22:06:53,668 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 193 flow [2024-10-31 22:06:53,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 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 22:06:53,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:53,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:53,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:06:53,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:53,870 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:53,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash 377506383, now seen corresponding path program 1 times [2024-10-31 22:06:53,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:53,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420613790] [2024-10-31 22:06:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:06:53,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420613790] [2024-10-31 22:06:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420613790] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:53,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:53,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:06:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045252098] [2024-10-31 22:06:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:53,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:53,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:53,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:53,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 22:06:53,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:53,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:53,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:55,019 INFO L124 PetriNetUnfolderBase]: 8640/12019 cut-off events. [2024-10-31 22:06:55,019 INFO L125 PetriNetUnfolderBase]: For 8009/8653 co-relation queries the response was YES. [2024-10-31 22:06:55,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31180 conditions, 12019 events. 8640/12019 cut-off events. For 8009/8653 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 66985 event pairs, 2795 based on Foata normal form. 644/12299 useless extension candidates. Maximal degree in co-relation 31147. Up to 8508 conditions per place. [2024-10-31 22:06:55,082 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 71 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-10-31 22:06:55,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 475 flow [2024-10-31 22:06:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:06:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:06:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-10-31 22:06:55,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2024-10-31 22:06:55,084 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 193 flow. Second operand 6 states and 176 transitions. [2024-10-31 22:06:55,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 475 flow [2024-10-31 22:06:55,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 470 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:55,093 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 217 flow [2024-10-31 22:06:55,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2024-10-31 22:06:55,094 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-10-31 22:06:55,094 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 217 flow [2024-10-31 22:06:55,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 22:06:55,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:55,095 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:55,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:06:55,095 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:55,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash 414544015, now seen corresponding path program 1 times [2024-10-31 22:06:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814901136] [2024-10-31 22:06:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814901136] [2024-10-31 22:06:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814901136] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612637741] [2024-10-31 22:06:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:55,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:55,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:55,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:55,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:06:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:55,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:06:55,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:55,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612637741] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:55,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:06:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407931227] [2024-10-31 22:06:55,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:55,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:06:55,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:55,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:06:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:06:55,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 69 [2024-10-31 22:06:55,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 217 flow. Second operand has 14 states, 14 states have (on average 19.071428571428573) internal successors, (267), 14 states have internal predecessors, (267), 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 22:06:55,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:55,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 69 [2024-10-31 22:06:55,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:57,814 INFO L124 PetriNetUnfolderBase]: 17897/24629 cut-off events. [2024-10-31 22:06:57,814 INFO L125 PetriNetUnfolderBase]: For 19749/21251 co-relation queries the response was YES. [2024-10-31 22:06:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69538 conditions, 24629 events. 17897/24629 cut-off events. For 19749/21251 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 153573 event pairs, 9982 based on Foata normal form. 1812/26116 useless extension candidates. Maximal degree in co-relation 41062. Up to 13826 conditions per place. [2024-10-31 22:06:57,947 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 125 selfloop transitions, 10 changer transitions 0/145 dead transitions. [2024-10-31 22:06:57,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 145 transitions, 841 flow [2024-10-31 22:06:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:06:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:06:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-10-31 22:06:57,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4420289855072464 [2024-10-31 22:06:57,950 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 217 flow. Second operand 8 states and 244 transitions. [2024-10-31 22:06:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 145 transitions, 841 flow [2024-10-31 22:06:57,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 145 transitions, 814 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:06:57,971 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 290 flow [2024-10-31 22:06:57,972 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=290, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-10-31 22:06:57,972 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2024-10-31 22:06:57,973 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 290 flow [2024-10-31 22:06:57,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.071428571428573) internal successors, (267), 14 states have internal predecessors, (267), 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 22:06:57,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:57,973 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:57,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:06:58,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:58,175 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:06:58,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:58,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2137541310, now seen corresponding path program 1 times [2024-10-31 22:06:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:58,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022683069] [2024-10-31 22:06:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:58,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:58,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022683069] [2024-10-31 22:06:58,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022683069] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420924320] [2024-10-31 22:06:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:58,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:58,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:06:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:58,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:06:58,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:58,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:58,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420924320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:58,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:58,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:06:58,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026910855] [2024-10-31 22:06:58,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:58,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:06:58,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:06:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:06:58,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-31 22:06:58,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 290 flow. Second operand has 14 states, 14 states have (on average 20.285714285714285) internal successors, (284), 14 states have internal predecessors, (284), 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 22:06:58,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:58,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-31 22:06:58,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:00,767 INFO L124 PetriNetUnfolderBase]: 13993/19151 cut-off events. [2024-10-31 22:07:00,767 INFO L125 PetriNetUnfolderBase]: For 19404/23120 co-relation queries the response was YES. [2024-10-31 22:07:00,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54678 conditions, 19151 events. 13993/19151 cut-off events. For 19404/23120 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 118350 event pairs, 8245 based on Foata normal form. 2967/21846 useless extension candidates. Maximal degree in co-relation 36531. Up to 12534 conditions per place. [2024-10-31 22:07:00,871 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 112 selfloop transitions, 10 changer transitions 0/134 dead transitions. [2024-10-31 22:07:00,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 794 flow [2024-10-31 22:07:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:07:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:07:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-10-31 22:07:00,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44021739130434784 [2024-10-31 22:07:00,873 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 290 flow. Second operand 8 states and 243 transitions. [2024-10-31 22:07:00,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 794 flow [2024-10-31 22:07:00,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 134 transitions, 786 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-31 22:07:00,908 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 347 flow [2024-10-31 22:07:00,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=347, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2024-10-31 22:07:00,909 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2024-10-31 22:07:00,909 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 347 flow [2024-10-31 22:07:00,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.285714285714285) internal successors, (284), 14 states have internal predecessors, (284), 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 22:07:00,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:00,910 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:00,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:07:01,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:01,111 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:07:01,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:01,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2068935152, now seen corresponding path program 1 times [2024-10-31 22:07:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:01,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956518018] [2024-10-31 22:07:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:01,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:07:01,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:07:01,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956518018] [2024-10-31 22:07:01,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956518018] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:07:01,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784275211] [2024-10-31 22:07:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:01,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:07:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:07:01,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:07:01,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:07:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:07:01,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:07:01,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:07:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:07:01,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:07:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:07:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784275211] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:07:01,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:07:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:07:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823042432] [2024-10-31 22:07:01,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:07:01,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:07:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:07:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:07:01,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:07:01,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 69 [2024-10-31 22:07:01,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 347 flow. Second operand has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 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 22:07:01,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:07:01,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 69 [2024-10-31 22:07:01,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:07:03,346 INFO L124 PetriNetUnfolderBase]: 14210/19246 cut-off events. [2024-10-31 22:07:03,346 INFO L125 PetriNetUnfolderBase]: For 31578/34362 co-relation queries the response was YES. [2024-10-31 22:07:03,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60046 conditions, 19246 events. 14210/19246 cut-off events. For 31578/34362 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 114596 event pairs, 8907 based on Foata normal form. 1717/20722 useless extension candidates. Maximal degree in co-relation 43449. Up to 13967 conditions per place. [2024-10-31 22:07:03,471 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 108 selfloop transitions, 10 changer transitions 0/129 dead transitions. [2024-10-31 22:07:03,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 845 flow [2024-10-31 22:07:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:07:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:07:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-10-31 22:07:03,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.427536231884058 [2024-10-31 22:07:03,473 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 347 flow. Second operand 8 states and 236 transitions. [2024-10-31 22:07:03,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 845 flow [2024-10-31 22:07:03,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 828 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-31 22:07:03,527 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 389 flow [2024-10-31 22:07:03,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=389, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2024-10-31 22:07:03,528 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 17 predicate places. [2024-10-31 22:07:03,528 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 389 flow [2024-10-31 22:07:03,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.214285714285715) internal successors, (269), 14 states have internal predecessors, (269), 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 22:07:03,528 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:07:03,528 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:07:03,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 22:07:03,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00cfd594-6c84-44f5-b287-f7e612a7ddaf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:07:03,729 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-31 22:07:03,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:07:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1889213689, now seen corresponding path program 2 times [2024-10-31 22:07:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:07:03,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096319449] [2024-10-31 22:07:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:07:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:07:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat