./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/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_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/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_65609eaa-db49-4d21-90f2-af763d938cc6/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 e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:16:56,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:16:56,351 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:16:56,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:16:56,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:16:56,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:16:56,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:16:56,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:16:56,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:16:56,387 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:16:56,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:16:56,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:16:56,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:16:56,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:16:56,390 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:16:56,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:16:56,391 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:16:56,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:16:56,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:16:56,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:16:56,393 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:16:56,394 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:16:56,394 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:16:56,394 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:16:56,395 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:16:56,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:16:56,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:16:56,396 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:16:56,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:16:56,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:16:56,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:16:56,397 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:16:56,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:16:56,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:56,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:16:56,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:16:56,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:16:56,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:16:56,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:16:56,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:16:56,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:16:56,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:16:56,402 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_65609eaa-db49-4d21-90f2-af763d938cc6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-10-31 22:16:56,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:16:56,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:16:56,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:16:56,718 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:16:56,719 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:16:56,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c Unable to find full path for "g++" [2024-10-31 22:16:58,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:16:59,146 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:16:59,147 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-10-31 22:16:59,155 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/data/0099d78ba/ec8d932c2f734eb1af97caa2bbacc648/FLAG50c4123e0 [2024-10-31 22:16:59,442 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/data/0099d78ba/ec8d932c2f734eb1af97caa2bbacc648 [2024-10-31 22:16:59,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:16:59,447 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:16:59,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:59,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:16:59,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:16:59,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:16:59,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2553a7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59, skipping insertion in model container [2024-10-31 22:16:59,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:16:59,494 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:16:59,817 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 22:16:59,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:59,843 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:16:59,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:59,915 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:16:59,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59 WrapperNode [2024-10-31 22:16:59,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:59,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:59,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:16:59,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:16:59,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:16:59,939 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:16:59,983 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 196 [2024-10-31 22:16:59,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:59,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:16:59,984 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:16:59,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:16:59,996 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:16:59,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,000 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,025 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-31 22:17:00,026 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,026 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,042 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:17:00,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:17:00,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:17:00,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:17:00,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (1/1) ... [2024-10-31 22:17:00,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:17:00,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:00,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:17:00,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:17:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:17:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:17:00,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:17:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:17:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:17:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:17:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:17:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:17:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:17:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:17:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:17:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:17:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:17:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:17:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:17:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:17:00,182 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 22:17:00,335 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:17:00,338 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:17:01,061 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:17:01,061 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:17:01,581 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:17:01,581 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:17:01,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:17:01 BoogieIcfgContainer [2024-10-31 22:17:01,582 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:17:01,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:17:01,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:17:01,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:17:01,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:16:59" (1/3) ... [2024-10-31 22:17:01,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e93610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:17:01, skipping insertion in model container [2024-10-31 22:17:01,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:59" (2/3) ... [2024-10-31 22:17:01,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e93610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:17:01, skipping insertion in model container [2024-10-31 22:17:01,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:17:01" (3/3) ... [2024-10-31 22:17:01,599 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-10-31 22:17:01,619 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:17:01,620 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-10-31 22:17:01,620 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:17:01,696 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:17:01,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 231 flow [2024-10-31 22:17:01,784 INFO L124 PetriNetUnfolderBase]: 15/102 cut-off events. [2024-10-31 22:17:01,785 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:17:01,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 15/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-10-31 22:17:01,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 231 flow [2024-10-31 22:17:01,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 101 transitions, 220 flow [2024-10-31 22:17:01,804 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:17:01,811 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;@2f435780, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:17:01,812 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-10-31 22:17:01,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:17:01,816 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:17:01,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:17:01,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:01,818 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:17:01,818 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:01,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 769178, now seen corresponding path program 1 times [2024-10-31 22:17:01,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:01,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247879326] [2024-10-31 22:17:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:02,119 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 22:17:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:02,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247879326] [2024-10-31 22:17:02,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247879326] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:02,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:02,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:17:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054546131] [2024-10-31 22:17:02,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:02,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:17:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:17:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:17:02,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-10-31 22:17:02,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 22:17:02,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:02,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-10-31 22:17:02,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:02,615 INFO L124 PetriNetUnfolderBase]: 703/1193 cut-off events. [2024-10-31 22:17:02,616 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-10-31 22:17:02,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1193 events. 703/1193 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5718 event pairs, 266 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 1879. Up to 878 conditions per place. [2024-10-31 22:17:02,635 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 38 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-10-31 22:17:02,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 290 flow [2024-10-31 22:17:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:17:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:17:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-10-31 22:17:02,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-10-31 22:17:02,652 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 220 flow. Second operand 3 states and 224 transitions. [2024-10-31 22:17:02,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 290 flow [2024-10-31 22:17:02,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 96 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:17:02,660 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 202 flow [2024-10-31 22:17:02,662 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-10-31 22:17:02,667 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2024-10-31 22:17:02,667 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 202 flow [2024-10-31 22:17:02,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 22:17:02,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:02,668 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:17:02,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:17:02,669 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:02,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 769179, now seen corresponding path program 1 times [2024-10-31 22:17:02,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:02,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592667981] [2024-10-31 22:17:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:02,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:03,038 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 22:17:03,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:03,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592667981] [2024-10-31 22:17:03,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592667981] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:03,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:03,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:17:03,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711322193] [2024-10-31 22:17:03,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:03,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:03,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:03,245 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-10-31 22:17:03,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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 22:17:03,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:03,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-10-31 22:17:03,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:03,675 INFO L124 PetriNetUnfolderBase]: 704/1196 cut-off events. [2024-10-31 22:17:03,675 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:17:03,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2114 conditions, 1196 events. 704/1196 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5720 event pairs, 266 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 2077. Up to 891 conditions per place. [2024-10-31 22:17:03,689 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-10-31 22:17:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 300 flow [2024-10-31 22:17:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:17:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:17:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-10-31 22:17:03,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-10-31 22:17:03,695 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 202 flow. Second operand 4 states and 287 transitions. [2024-10-31 22:17:03,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 300 flow [2024-10-31 22:17:03,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:03,701 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 225 flow [2024-10-31 22:17:03,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-10-31 22:17:03,704 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -6 predicate places. [2024-10-31 22:17:03,704 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 225 flow [2024-10-31 22:17:03,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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 22:17:03,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:03,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:17:03,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:17:03,706 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:03,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 23844803, now seen corresponding path program 1 times [2024-10-31 22:17:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:03,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438285574] [2024-10-31 22:17:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:04,028 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 22:17:04,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:04,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438285574] [2024-10-31 22:17:04,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438285574] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:04,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:04,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:17:04,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18021074] [2024-10-31 22:17:04,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:04,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:04,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:04,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-10-31 22:17:04,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 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 22:17:04,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:04,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-10-31 22:17:04,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:04,593 INFO L124 PetriNetUnfolderBase]: 705/1199 cut-off events. [2024-10-31 22:17:04,593 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:17:04,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1199 events. 705/1199 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5723 event pairs, 266 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 2106. Up to 890 conditions per place. [2024-10-31 22:17:04,606 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 42 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2024-10-31 22:17:04,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 329 flow [2024-10-31 22:17:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 350 transitions. [2024-10-31 22:17:04,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-31 22:17:04,613 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 225 flow. Second operand 5 states and 350 transitions. [2024-10-31 22:17:04,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 329 flow [2024-10-31 22:17:04,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:04,617 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 259 flow [2024-10-31 22:17:04,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-10-31 22:17:04,618 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -1 predicate places. [2024-10-31 22:17:04,618 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 259 flow [2024-10-31 22:17:04,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 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 22:17:04,619 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:04,619 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:17:04,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:17:04,619 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:04,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 739205423, now seen corresponding path program 1 times [2024-10-31 22:17:04,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:04,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420880929] [2024-10-31 22:17:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:04,946 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 22:17:04,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420880929] [2024-10-31 22:17:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420880929] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:04,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264744573] [2024-10-31 22:17:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:04,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:04,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:04,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:17:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:05,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:17:05,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:05,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:17:05,346 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 22:17:05,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:05,487 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 22:17:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264744573] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:05,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:05,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:17:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297273466] [2024-10-31 22:17:05,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:05,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:17:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:17:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:17:06,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-10-31 22:17:06,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 259 flow. Second operand has 11 states, 11 states have (on average 61.36363636363637) internal successors, (675), 11 states have internal predecessors, (675), 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 22:17:06,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:06,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-10-31 22:17:06,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:06,855 INFO L124 PetriNetUnfolderBase]: 706/1201 cut-off events. [2024-10-31 22:17:06,855 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 22:17:06,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 1201 events. 706/1201 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5733 event pairs, 266 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 2116. Up to 891 conditions per place. [2024-10-31 22:17:06,869 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 41 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-10-31 22:17:06,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 372 flow [2024-10-31 22:17:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:17:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:17:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 530 transitions. [2024-10-31 22:17:06,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-10-31 22:17:06,872 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 259 flow. Second operand 8 states and 530 transitions. [2024-10-31 22:17:06,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 372 flow [2024-10-31 22:17:06,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:06,877 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 289 flow [2024-10-31 22:17:06,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-10-31 22:17:06,879 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2024-10-31 22:17:06,879 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 289 flow [2024-10-31 22:17:06,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 61.36363636363637) internal successors, (675), 11 states have internal predecessors, (675), 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 22:17:06,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:06,880 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:17:06,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:17:07,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:07,085 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:07,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash 739190331, now seen corresponding path program 1 times [2024-10-31 22:17:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:07,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901526365] [2024-10-31 22:17:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:07,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:07,320 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 22:17:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:07,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901526365] [2024-10-31 22:17:07,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901526365] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:07,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:07,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:17:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024779096] [2024-10-31 22:17:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:07,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:07,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-10-31 22:17:07,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 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 22:17:07,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:07,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-10-31 22:17:07,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:07,902 INFO L124 PetriNetUnfolderBase]: 707/1204 cut-off events. [2024-10-31 22:17:07,903 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 22:17:07,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1204 events. 707/1204 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5782 event pairs, 266 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 2124. Up to 895 conditions per place. [2024-10-31 22:17:07,915 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 45 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-10-31 22:17:07,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 403 flow [2024-10-31 22:17:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2024-10-31 22:17:07,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6647619047619048 [2024-10-31 22:17:07,918 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 289 flow. Second operand 5 states and 349 transitions. [2024-10-31 22:17:07,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 403 flow [2024-10-31 22:17:07,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 356 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-10-31 22:17:07,922 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 285 flow [2024-10-31 22:17:07,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-10-31 22:17:07,923 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2024-10-31 22:17:07,923 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 285 flow [2024-10-31 22:17:07,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 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 22:17:07,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:07,924 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:17:07,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:17:07,925 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:07,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1440043699, now seen corresponding path program 1 times [2024-10-31 22:17:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009314462] [2024-10-31 22:17:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:08,156 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 22:17:08,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009314462] [2024-10-31 22:17:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009314462] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257502813] [2024-10-31 22:17:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:08,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:08,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:17:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:08,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:17:08,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:08,272 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 22:17:08,508 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 22:17:08,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:08,804 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 22:17:08,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257502813] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:08,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:08,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:17:08,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017613186] [2024-10-31 22:17:08,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:08,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:17:08,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:08,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:17:08,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:17:10,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 105 [2024-10-31 22:17:10,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 60.30769230769231) internal successors, (784), 13 states have internal predecessors, (784), 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 22:17:10,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 105 [2024-10-31 22:17:10,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:11,227 INFO L124 PetriNetUnfolderBase]: 800/1395 cut-off events. [2024-10-31 22:17:11,228 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-31 22:17:11,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1395 events. 800/1395 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7120 event pairs, 335 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2444. Up to 1016 conditions per place. [2024-10-31 22:17:11,241 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 39 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-10-31 22:17:11,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 410 flow [2024-10-31 22:17:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:17:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:17:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 587 transitions. [2024-10-31 22:17:11,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6211640211640211 [2024-10-31 22:17:11,244 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 285 flow. Second operand 9 states and 587 transitions. [2024-10-31 22:17:11,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 410 flow [2024-10-31 22:17:11,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:11,251 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 324 flow [2024-10-31 22:17:11,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=324, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-10-31 22:17:11,252 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-10-31 22:17:11,253 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 324 flow [2024-10-31 22:17:11,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.30769230769231) internal successors, (784), 13 states have internal predecessors, (784), 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 22:17:11,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:11,254 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:17:11,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:17:11,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:11,458 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:11,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1692327978, now seen corresponding path program 1 times [2024-10-31 22:17:11,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:11,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588517662] [2024-10-31 22:17:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:11,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:11,747 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 22:17:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588517662] [2024-10-31 22:17:11,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588517662] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:11,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174568529] [2024-10-31 22:17:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:11,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:11,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:11,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:11,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:17:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:11,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:17:11,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:11,870 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 22:17:12,129 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 22:17:12,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:12,394 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 22:17:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174568529] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:12,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:12,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:17:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355038746] [2024-10-31 22:17:12,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:12,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:17:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:17:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:17:13,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-10-31 22:17:13,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 324 flow. Second operand has 13 states, 13 states have (on average 61.46153846153846) internal successors, (799), 13 states have internal predecessors, (799), 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 22:17:13,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:13,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-10-31 22:17:13,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:14,579 INFO L124 PetriNetUnfolderBase]: 708/1205 cut-off events. [2024-10-31 22:17:14,579 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-31 22:17:14,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2183 conditions, 1205 events. 708/1205 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5750 event pairs, 266 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 2128. Up to 887 conditions per place. [2024-10-31 22:17:14,593 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 36 selfloop transitions, 19 changer transitions 0/108 dead transitions. [2024-10-31 22:17:14,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 430 flow [2024-10-31 22:17:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:17:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:17:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2024-10-31 22:17:14,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6353741496598639 [2024-10-31 22:17:14,597 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 324 flow. Second operand 7 states and 467 transitions. [2024-10-31 22:17:14,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 430 flow [2024-10-31 22:17:14,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 108 transitions, 397 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-31 22:17:14,601 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 325 flow [2024-10-31 22:17:14,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=103, PETRI_TRANSITIONS=108} [2024-10-31 22:17:14,602 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-10-31 22:17:14,602 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 325 flow [2024-10-31 22:17:14,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 61.46153846153846) internal successors, (799), 13 states have internal predecessors, (799), 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 22:17:14,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:14,604 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:14,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:17:14,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:14,834 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:14,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 926078392, now seen corresponding path program 1 times [2024-10-31 22:17:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:14,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810629062] [2024-10-31 22:17:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:14,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:14,933 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 22:17:14,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:14,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810629062] [2024-10-31 22:17:14,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810629062] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:14,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:14,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:17:14,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563683707] [2024-10-31 22:17:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:14,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:14,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-10-31 22:17:14,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 108 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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 22:17:14,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:14,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-10-31 22:17:14,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:15,372 INFO L124 PetriNetUnfolderBase]: 1226/2193 cut-off events. [2024-10-31 22:17:15,373 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-31 22:17:15,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 2193 events. 1226/2193 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12600 event pairs, 533 based on Foata normal form. 0/1364 useless extension candidates. Maximal degree in co-relation 2462. Up to 1029 conditions per place. [2024-10-31 22:17:15,405 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 91 selfloop transitions, 8 changer transitions 0/151 dead transitions. [2024-10-31 22:17:15,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 671 flow [2024-10-31 22:17:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-10-31 22:17:15,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2024-10-31 22:17:15,408 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 325 flow. Second operand 5 states and 395 transitions. [2024-10-31 22:17:15,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 671 flow [2024-10-31 22:17:15,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 607 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-10-31 22:17:15,413 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 346 flow [2024-10-31 22:17:15,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-10-31 22:17:15,416 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-10-31 22:17:15,417 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 346 flow [2024-10-31 22:17:15,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 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 22:17:15,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:15,418 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:15,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:17:15,418 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:15,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -329060956, now seen corresponding path program 1 times [2024-10-31 22:17:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563131639] [2024-10-31 22:17:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:15,553 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 22:17:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:15,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563131639] [2024-10-31 22:17:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563131639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:15,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:15,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:15,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050048883] [2024-10-31 22:17:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:15,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:15,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:15,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:15,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-10-31 22:17:15,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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 22:17:15,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:15,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-10-31 22:17:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:16,337 INFO L124 PetriNetUnfolderBase]: 2626/4724 cut-off events. [2024-10-31 22:17:16,337 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-10-31 22:17:16,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8428 conditions, 4724 events. 2626/4724 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31672 event pairs, 873 based on Foata normal form. 37/3116 useless extension candidates. Maximal degree in co-relation 5608. Up to 1360 conditions per place. [2024-10-31 22:17:16,380 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 115 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-10-31 22:17:16,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 179 transitions, 770 flow [2024-10-31 22:17:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:17:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:17:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 481 transitions. [2024-10-31 22:17:16,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7634920634920634 [2024-10-31 22:17:16,383 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 346 flow. Second operand 6 states and 481 transitions. [2024-10-31 22:17:16,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 179 transitions, 770 flow [2024-10-31 22:17:16,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 765 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:16,389 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 421 flow [2024-10-31 22:17:16,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-10-31 22:17:16,390 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 13 predicate places. [2024-10-31 22:17:16,390 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 421 flow [2024-10-31 22:17:16,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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 22:17:16,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:16,391 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:16,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:17:16,391 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:16,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash 827618090, now seen corresponding path program 1 times [2024-10-31 22:17:16,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:16,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922282417] [2024-10-31 22:17:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:16,490 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 22:17:16,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922282417] [2024-10-31 22:17:16,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922282417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:16,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:16,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:16,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125649946] [2024-10-31 22:17:16,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:16,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:16,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:16,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-10-31 22:17:16,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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 22:17:16,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:16,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-10-31 22:17:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:17,369 INFO L124 PetriNetUnfolderBase]: 3124/5898 cut-off events. [2024-10-31 22:17:17,369 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2024-10-31 22:17:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 5898 events. 3124/5898 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42578 event pairs, 965 based on Foata normal form. 0/3964 useless extension candidates. Maximal degree in co-relation 6123. Up to 1919 conditions per place. [2024-10-31 22:17:17,416 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 113 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2024-10-31 22:17:17,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 177 transitions, 811 flow [2024-10-31 22:17:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:17:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:17:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 477 transitions. [2024-10-31 22:17:17,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7571428571428571 [2024-10-31 22:17:17,419 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 421 flow. Second operand 6 states and 477 transitions. [2024-10-31 22:17:17,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 177 transitions, 811 flow [2024-10-31 22:17:17,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 808 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:17,423 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 460 flow [2024-10-31 22:17:17,424 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-10-31 22:17:17,425 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 19 predicate places. [2024-10-31 22:17:17,427 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 460 flow [2024-10-31 22:17:17,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 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 22:17:17,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:17,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:17,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:17:17,428 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:17,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:17,429 INFO L85 PathProgramCache]: Analyzing trace with hash 487531924, now seen corresponding path program 1 times [2024-10-31 22:17:17,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:17,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173604452] [2024-10-31 22:17:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:17:17,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:17,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173604452] [2024-10-31 22:17:17,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173604452] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:17,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:17,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:17:17,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517939922] [2024-10-31 22:17:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:17,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:17,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:17,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 105 [2024-10-31 22:17:17,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 22:17:17,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:17,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 105 [2024-10-31 22:17:17,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:18,282 INFO L124 PetriNetUnfolderBase]: 3203/5333 cut-off events. [2024-10-31 22:17:18,283 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-10-31 22:17:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10578 conditions, 5333 events. 3203/5333 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 32968 event pairs, 1965 based on Foata normal form. 0/4488 useless extension candidates. Maximal degree in co-relation 6415. Up to 4402 conditions per place. [2024-10-31 22:17:18,334 INFO L140 encePairwiseOnDemand]: 98/105 looper letters, 61 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-10-31 22:17:18,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 115 transitions, 592 flow [2024-10-31 22:17:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2024-10-31 22:17:18,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-10-31 22:17:18,336 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 460 flow. Second operand 5 states and 308 transitions. [2024-10-31 22:17:18,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 115 transitions, 592 flow [2024-10-31 22:17:18,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 579 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:17:18,340 INFO L231 Difference]: Finished difference. Result has 112 places, 115 transitions, 457 flow [2024-10-31 22:17:18,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=112, PETRI_TRANSITIONS=115} [2024-10-31 22:17:18,341 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 16 predicate places. [2024-10-31 22:17:18,341 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 115 transitions, 457 flow [2024-10-31 22:17:18,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 22:17:18,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:18,342 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:18,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:17:18,342 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:18,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash 747044510, now seen corresponding path program 1 times [2024-10-31 22:17:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197122396] [2024-10-31 22:17:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:18,461 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 22:17:18,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:18,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197122396] [2024-10-31 22:17:18,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197122396] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:18,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:17:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397537459] [2024-10-31 22:17:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:18,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:18,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-10-31 22:17:18,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 115 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 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 22:17:18,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:18,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-10-31 22:17:18,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:19,028 INFO L124 PetriNetUnfolderBase]: 2340/3823 cut-off events. [2024-10-31 22:17:19,028 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-10-31 22:17:19,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7711 conditions, 3823 events. 2340/3823 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21518 event pairs, 1459 based on Foata normal form. 0/3079 useless extension candidates. Maximal degree in co-relation 4888. Up to 2510 conditions per place. [2024-10-31 22:17:19,063 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 94 selfloop transitions, 10 changer transitions 0/152 dead transitions. [2024-10-31 22:17:19,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 152 transitions, 774 flow [2024-10-31 22:17:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2024-10-31 22:17:19,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7485714285714286 [2024-10-31 22:17:19,066 INFO L175 Difference]: Start difference. First operand has 112 places, 115 transitions, 457 flow. Second operand 5 states and 393 transitions. [2024-10-31 22:17:19,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 152 transitions, 774 flow [2024-10-31 22:17:19,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 760 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:17:19,072 INFO L231 Difference]: Finished difference. Result has 114 places, 115 transitions, 473 flow [2024-10-31 22:17:19,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2024-10-31 22:17:19,073 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 18 predicate places. [2024-10-31 22:17:19,073 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 473 flow [2024-10-31 22:17:19,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 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 22:17:19,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:19,074 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:19,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:17:19,074 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:19,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash 588380698, now seen corresponding path program 1 times [2024-10-31 22:17:19,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732387108] [2024-10-31 22:17:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:19,181 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 22:17:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732387108] [2024-10-31 22:17:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732387108] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623077041] [2024-10-31 22:17:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:19,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:19,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-10-31 22:17:19,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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 22:17:19,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:19,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-10-31 22:17:19,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:20,098 INFO L124 PetriNetUnfolderBase]: 3767/7062 cut-off events. [2024-10-31 22:17:20,099 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2024-10-31 22:17:20,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13416 conditions, 7062 events. 3767/7062 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 51680 event pairs, 1621 based on Foata normal form. 83/5634 useless extension candidates. Maximal degree in co-relation 10025. Up to 2038 conditions per place. [2024-10-31 22:17:20,165 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 109 selfloop transitions, 15 changer transitions 0/172 dead transitions. [2024-10-31 22:17:20,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 855 flow [2024-10-31 22:17:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2024-10-31 22:17:20,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7828571428571428 [2024-10-31 22:17:20,167 INFO L175 Difference]: Start difference. First operand has 114 places, 115 transitions, 473 flow. Second operand 5 states and 411 transitions. [2024-10-31 22:17:20,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 855 flow [2024-10-31 22:17:20,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 835 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:17:20,175 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 489 flow [2024-10-31 22:17:20,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=489, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2024-10-31 22:17:20,176 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 19 predicate places. [2024-10-31 22:17:20,176 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 489 flow [2024-10-31 22:17:20,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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 22:17:20,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:20,177 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:20,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:17:20,177 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:17:20,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:20,178 INFO L85 PathProgramCache]: Analyzing trace with hash 487531925, now seen corresponding path program 1 times [2024-10-31 22:17:20,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475782917] [2024-10-31 22:17:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:17:20,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475782917] [2024-10-31 22:17:20,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475782917] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218997367] [2024-10-31 22:17:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:20,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:20,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:20,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:20,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65609eaa-db49-4d21-90f2-af763d938cc6/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:17:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:20,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:17:20,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:20,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:17:20,913 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-31 22:17:20,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-31 22:17:20,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:20,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-31 22:17:21,014 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:17:21,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:17:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:17:21,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:21,410 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 189 treesize of output 183 [2024-10-31 22:17:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:17:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218997367] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:21,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:21,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-31 22:17:21,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471943929] [2024-10-31 22:17:21,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:21,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:17:21,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:17:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:17:26,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]