./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.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_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/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_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/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_dbd12725-ddca-4ec6-9d60-0946b1df48f4/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 c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:55:24,103 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:55:24,201 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 21:55:24,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:55:24,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:55:24,246 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:55:24,247 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:55:24,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:55:24,249 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:55:24,250 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:55:24,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:55:24,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:55:24,254 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:55:24,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:55:24,254 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:55:24,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:55:24,255 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:55:24,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:55:24,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:55:24,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:55:24,257 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 21:55:24,258 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 21:55:24,259 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 21:55:24,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:55:24,260 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 21:55:24,260 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:55:24,260 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 21:55:24,261 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:55:24,261 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:55:24,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:55:24,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:55:24,262 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:55:24,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:55:24,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:24,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:55:24,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:55:24,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:55:24,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:55:24,265 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:55:24,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:55:24,266 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:55:24,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:55:24,267 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_dbd12725-ddca-4ec6-9d60-0946b1df48f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-10-31 21:55:24,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:55:24,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:55:24,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:55:24,619 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:55:24,619 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:55:24,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c Unable to find full path for "g++" [2024-10-31 21:55:26,601 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:55:26,807 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:55:26,807 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-10-31 21:55:26,817 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/data/836828647/c50f7306ee904fb4afc143125b9ebd79/FLAG0665bed30 [2024-10-31 21:55:26,833 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/data/836828647/c50f7306ee904fb4afc143125b9ebd79 [2024-10-31 21:55:26,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:55:26,838 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:55:26,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:26,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:55:26,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:55:26,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:26" (1/1) ... [2024-10-31 21:55:26,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@110d2ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:26, skipping insertion in model container [2024-10-31 21:55:26,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:55:26" (1/1) ... [2024-10-31 21:55:26,882 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:55:27,184 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 21:55:27,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:27,204 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:55:27,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:55:27,277 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:55:27,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27 WrapperNode [2024-10-31 21:55:27,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:55:27,281 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:27,281 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:55:27,281 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:55:27,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,301 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,341 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 140 [2024-10-31 21:55:27,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:55:27,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:55:27,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:55:27,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:55:27,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,366 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,395 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-10-31 21:55:27,396 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,415 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,417 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:55:27,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:55:27,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:55:27,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:55:27,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (1/1) ... [2024-10-31 21:55:27,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:55:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:27,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:55:27,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:55:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:55:27,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:55:27,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:55:27,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:55:27,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:55:27,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 21:55:27,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 21:55:27,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:55:27,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:55:27,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:55:27,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:55:27,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:55:27,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:55:27,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:55:27,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:55:27,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:55:27,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:55:27,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:55:27,507 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:55:27,693 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:55:27,696 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:55:28,219 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:55:28,219 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:55:28,747 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:55:28,747 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 21:55:28,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:28 BoogieIcfgContainer [2024-10-31 21:55:28,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:55:28,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:55:28,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:55:28,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:55:28,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:55:26" (1/3) ... [2024-10-31 21:55:28,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484571fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:28, skipping insertion in model container [2024-10-31 21:55:28,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:55:27" (2/3) ... [2024-10-31 21:55:28,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@484571fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:55:28, skipping insertion in model container [2024-10-31 21:55:28,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:55:28" (3/3) ... [2024-10-31 21:55:28,783 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-10-31 21:55:28,822 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:55:28,822 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-31 21:55:28,822 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:55:28,928 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 21:55:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2024-10-31 21:55:29,120 INFO L124 PetriNetUnfolderBase]: 7/61 cut-off events. [2024-10-31 21:55:29,120 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:55:29,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 7/61 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 152 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-10-31 21:55:29,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2024-10-31 21:55:29,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 138 flow [2024-10-31 21:55:29,151 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:55:29,160 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;@a26b1c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:55:29,160 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-10-31 21:55:29,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:55:29,168 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 21:55:29,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 21:55:29,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:29,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:55:29,169 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:29,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 607425, now seen corresponding path program 1 times [2024-10-31 21:55:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:29,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283515935] [2024-10-31 21:55:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:29,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:29,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:29,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283515935] [2024-10-31 21:55:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283515935] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:29,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:29,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:55:29,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572212080] [2024-10-31 21:55:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:29,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:55:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:55:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:55:29,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:29,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:29,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:29,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:29,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:30,319 INFO L124 PetriNetUnfolderBase]: 1588/2580 cut-off events. [2024-10-31 21:55:30,320 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-10-31 21:55:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 2580 events. 1588/2580 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15398 event pairs, 1210 based on Foata normal form. 1/1918 useless extension candidates. Maximal degree in co-relation 4374. Up to 2144 conditions per place. [2024-10-31 21:55:30,350 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 38 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-10-31 21:55:30,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 208 flow [2024-10-31 21:55:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:55:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:55:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-10-31 21:55:30,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-10-31 21:55:30,366 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 101 transitions. [2024-10-31 21:55:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 208 flow [2024-10-31 21:55:30,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:55:30,376 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 120 flow [2024-10-31 21:55:30,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-10-31 21:55:30,382 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2024-10-31 21:55:30,382 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 120 flow [2024-10-31 21:55:30,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:30,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:30,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:55:30,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:55:30,384 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:30,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 607426, now seen corresponding path program 1 times [2024-10-31 21:55:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150255242] [2024-10-31 21:55:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:30,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:30,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150255242] [2024-10-31 21:55:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150255242] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:30,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:55:30,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936680725] [2024-10-31 21:55:30,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:30,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:30,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:30,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:30,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:30,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:30,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:31,331 INFO L124 PetriNetUnfolderBase]: 1589/2583 cut-off events. [2024-10-31 21:55:31,331 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 21:55:31,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 2583 events. 1589/2583 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15377 event pairs, 1210 based on Foata normal form. 0/1917 useless extension candidates. Maximal degree in co-relation 4754. Up to 2157 conditions per place. [2024-10-31 21:55:31,353 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-10-31 21:55:31,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 218 flow [2024-10-31 21:55:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:55:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-10-31 21:55:31,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2024-10-31 21:55:31,357 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 120 flow. Second operand 4 states and 123 transitions. [2024-10-31 21:55:31,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 218 flow [2024-10-31 21:55:31,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:55:31,361 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 143 flow [2024-10-31 21:55:31,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-10-31 21:55:31,362 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2024-10-31 21:55:31,363 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 143 flow [2024-10-31 21:55:31,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:31,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:31,364 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 21:55:31,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:55:31,365 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:31,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 18832013, now seen corresponding path program 1 times [2024-10-31 21:55:31,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:31,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551104189] [2024-10-31 21:55:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:31,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:31,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:31,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551104189] [2024-10-31 21:55:31,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551104189] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:31,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:31,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:31,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090417247] [2024-10-31 21:55:31,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:31,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:31,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:31,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-10-31 21:55:31,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:31,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:31,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-10-31 21:55:31,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:31,991 INFO L124 PetriNetUnfolderBase]: 1591/2593 cut-off events. [2024-10-31 21:55:31,991 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 21:55:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 2593 events. 1591/2593 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15431 event pairs, 1210 based on Foata normal form. 0/1928 useless extension candidates. Maximal degree in co-relation 4765. Up to 2155 conditions per place. [2024-10-31 21:55:32,014 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-10-31 21:55:32,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 261 flow [2024-10-31 21:55:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:55:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-10-31 21:55:32,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-10-31 21:55:32,018 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 143 flow. Second operand 4 states and 141 transitions. [2024-10-31 21:55:32,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 261 flow [2024-10-31 21:55:32,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:55:32,020 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 196 flow [2024-10-31 21:55:32,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-10-31 21:55:32,023 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-10-31 21:55:32,024 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 196 flow [2024-10-31 21:55:32,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:32,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:32,025 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 21:55:32,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:55:32,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:32,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash 583755680, now seen corresponding path program 1 times [2024-10-31 21:55:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:32,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254475761] [2024-10-31 21:55:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:32,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:32,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254475761] [2024-10-31 21:55:32,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254475761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:32,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656252751] [2024-10-31 21:55:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:32,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:32,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:32,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:32,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:55:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:32,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 21:55:32,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:32,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:55:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:32,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:32,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656252751] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:32,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:32,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 21:55:32,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660232337] [2024-10-31 21:55:32,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:32,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:55:32,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:55:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:55:33,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:33,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:33,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:33,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:33,587 INFO L124 PetriNetUnfolderBase]: 1592/2595 cut-off events. [2024-10-31 21:55:33,588 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-31 21:55:33,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 2595 events. 1592/2595 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15452 event pairs, 1210 based on Foata normal form. 0/1935 useless extension candidates. Maximal degree in co-relation 4770. Up to 2164 conditions per place. [2024-10-31 21:55:33,608 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-10-31 21:55:33,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 315 flow [2024-10-31 21:55:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:55:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 21:55:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-10-31 21:55:33,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39453125 [2024-10-31 21:55:33,610 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 196 flow. Second operand 8 states and 202 transitions. [2024-10-31 21:55:33,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 315 flow [2024-10-31 21:55:33,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 21:55:33,614 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 227 flow [2024-10-31 21:55:33,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-10-31 21:55:33,615 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-10-31 21:55:33,615 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 227 flow [2024-10-31 21:55:33,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:33,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:33,616 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 21:55:33,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:33,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-31 21:55:33,817 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:33,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash 916558703, now seen corresponding path program 1 times [2024-10-31 21:55:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:33,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688677127] [2024-10-31 21:55:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:33,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688677127] [2024-10-31 21:55:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688677127] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672602240] [2024-10-31 21:55:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:34,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:34,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:34,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:34,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:55:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:34,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 21:55:34,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:34,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:55:34,328 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 21:55:34,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-10-31 21:55:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:34,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:34,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672602240] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:34,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:55:34,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-10-31 21:55:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934247230] [2024-10-31 21:55:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:34,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-10-31 21:55:34,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:34,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:34,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:34,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:34,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:35,479 INFO L124 PetriNetUnfolderBase]: 3176/5161 cut-off events. [2024-10-31 21:55:35,479 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-10-31 21:55:35,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 5161 events. 3176/5161 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34576 event pairs, 2420 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 4811. Up to 2158 conditions per place. [2024-10-31 21:55:35,521 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-10-31 21:55:35,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 480 flow [2024-10-31 21:55:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:55:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-10-31 21:55:35,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-31 21:55:35,523 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 227 flow. Second operand 5 states and 180 transitions. [2024-10-31 21:55:35,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 480 flow [2024-10-31 21:55:35,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 438 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-31 21:55:35,529 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 221 flow [2024-10-31 21:55:35,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-10-31 21:55:35,531 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-10-31 21:55:35,532 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 221 flow [2024-10-31 21:55:35,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:35,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:35,533 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:35,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:55:35,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:35,737 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:35,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash 344637380, now seen corresponding path program 1 times [2024-10-31 21:55:35,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:35,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587257771] [2024-10-31 21:55:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:35,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:35,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587257771] [2024-10-31 21:55:35,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587257771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507197195] [2024-10-31 21:55:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:35,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:35,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:55:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:35,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 21:55:35,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:36,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507197195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:36,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:36,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-31 21:55:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694920019] [2024-10-31 21:55:36,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:36,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 21:55:36,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 21:55:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:55:36,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-10-31 21:55:36,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:36,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:36,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-10-31 21:55:36,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:37,474 INFO L124 PetriNetUnfolderBase]: 4764/7744 cut-off events. [2024-10-31 21:55:37,475 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-10-31 21:55:37,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 7744 events. 4764/7744 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 50395 event pairs, 3630 based on Foata normal form. 2/5771 useless extension candidates. Maximal degree in co-relation 4785. Up to 4290 conditions per place. [2024-10-31 21:55:37,529 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 70 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-10-31 21:55:37,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 113 transitions, 571 flow [2024-10-31 21:55:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:55:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 21:55:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-10-31 21:55:37,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-10-31 21:55:37,531 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 221 flow. Second operand 9 states and 298 transitions. [2024-10-31 21:55:37,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 113 transitions, 571 flow [2024-10-31 21:55:37,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:55:37,655 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 373 flow [2024-10-31 21:55:37,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-10-31 21:55:37,658 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2024-10-31 21:55:37,658 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 373 flow [2024-10-31 21:55:37,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:37,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:37,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:37,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:55:37,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 21:55:37,861 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:37,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1482732715, now seen corresponding path program 1 times [2024-10-31 21:55:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:37,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187640048] [2024-10-31 21:55:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:37,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:37,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187640048] [2024-10-31 21:55:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187640048] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:37,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:55:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553159267] [2024-10-31 21:55:37,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:37,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:38,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-10-31 21:55:38,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 373 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:38,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:38,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-10-31 21:55:38,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:39,502 INFO L124 PetriNetUnfolderBase]: 6124/10015 cut-off events. [2024-10-31 21:55:39,502 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-10-31 21:55:39,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 10015 events. 6124/10015 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 68369 event pairs, 4224 based on Foata normal form. 0/7093 useless extension candidates. Maximal degree in co-relation 6865. Up to 5273 conditions per place. [2024-10-31 21:55:39,670 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 97 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-10-31 21:55:39,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 729 flow [2024-10-31 21:55:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:55:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:55:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-10-31 21:55:39,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-10-31 21:55:39,671 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 373 flow. Second operand 6 states and 228 transitions. [2024-10-31 21:55:39,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 729 flow [2024-10-31 21:55:39,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 659 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-10-31 21:55:39,678 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 361 flow [2024-10-31 21:55:39,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-10-31 21:55:39,680 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-10-31 21:55:39,680 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 361 flow [2024-10-31 21:55:39,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:39,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:39,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:39,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 21:55:39,681 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:39,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1073711366, now seen corresponding path program 1 times [2024-10-31 21:55:39,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:39,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871292469] [2024-10-31 21:55:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:39,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:39,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871292469] [2024-10-31 21:55:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871292469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:39,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:55:39,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566456018] [2024-10-31 21:55:39,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:39,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:39,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-10-31 21:55:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-10-31 21:55:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:40,736 INFO L124 PetriNetUnfolderBase]: 4074/6689 cut-off events. [2024-10-31 21:55:40,736 INFO L125 PetriNetUnfolderBase]: For 1340/1646 co-relation queries the response was YES. [2024-10-31 21:55:40,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13541 conditions, 6689 events. 4074/6689 cut-off events. For 1340/1646 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 39523 event pairs, 2922 based on Foata normal form. 0/5076 useless extension candidates. Maximal degree in co-relation 5556. Up to 4727 conditions per place. [2024-10-31 21:55:40,787 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-10-31 21:55:40,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 653 flow [2024-10-31 21:55:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:55:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:55:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-10-31 21:55:40,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-10-31 21:55:40,790 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 361 flow. Second operand 6 states and 211 transitions. [2024-10-31 21:55:40,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 653 flow [2024-10-31 21:55:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:55:40,796 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 387 flow [2024-10-31 21:55:40,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-10-31 21:55:40,799 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-10-31 21:55:40,799 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 387 flow [2024-10-31 21:55:40,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:40,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:40,799 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-10-31 21:55:40,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 21:55:40,800 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:40,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash -626935898, now seen corresponding path program 2 times [2024-10-31 21:55:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:40,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39098513] [2024-10-31 21:55:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:41,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:41,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39098513] [2024-10-31 21:55:41,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39098513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95565291] [2024-10-31 21:55:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:55:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:41,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:55:41,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:55:41,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:55:41,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:55:41,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:41,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:55:41,483 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 21:55:41,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-10-31 21:55:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:41,593 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:41,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95565291] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:41,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:41,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-31 21:55:41,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399865950] [2024-10-31 21:55:41,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:41,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 21:55:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 21:55:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:55:42,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:42,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 387 flow. Second operand has 19 states, 19 states have (on average 20.57894736842105) internal successors, (391), 19 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:42,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:42,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:42,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:44,743 INFO L124 PetriNetUnfolderBase]: 3861/6238 cut-off events. [2024-10-31 21:55:44,743 INFO L125 PetriNetUnfolderBase]: For 2051/2396 co-relation queries the response was YES. [2024-10-31 21:55:44,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 6238 events. 3861/6238 cut-off events. For 2051/2396 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38556 event pairs, 3085 based on Foata normal form. 12/4800 useless extension candidates. Maximal degree in co-relation 5521. Up to 3200 conditions per place. [2024-10-31 21:55:44,790 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 90 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-10-31 21:55:44,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 823 flow [2024-10-31 21:55:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 21:55:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 21:55:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 355 transitions. [2024-10-31 21:55:44,792 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4622395833333333 [2024-10-31 21:55:44,792 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 387 flow. Second operand 12 states and 355 transitions. [2024-10-31 21:55:44,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 823 flow [2024-10-31 21:55:44,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 132 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:55:44,800 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 482 flow [2024-10-31 21:55:44,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-10-31 21:55:44,801 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 29 predicate places. [2024-10-31 21:55:44,801 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 482 flow [2024-10-31 21:55:44,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.57894736842105) internal successors, (391), 19 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:44,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:44,802 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-10-31 21:55:44,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:55:45,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:45,003 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:45,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1189957061, now seen corresponding path program 3 times [2024-10-31 21:55:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:45,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672150601] [2024-10-31 21:55:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:45,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:45,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672150601] [2024-10-31 21:55:45,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672150601] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:45,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182577095] [2024-10-31 21:55:45,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:55:45,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:45,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:45,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:55:45,261 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 21:55:45,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:55:45,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 21:55:45,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:45,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:55:45,410 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-10-31 21:55:45,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2024-10-31 21:55:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:55:45,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:55:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182577095] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:55:45,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:55:45,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-31 21:55:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240814744] [2024-10-31 21:55:45,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:55:45,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 21:55:45,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 21:55:45,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-10-31 21:55:46,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:46,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 482 flow. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:46,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:46,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:46,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:48,613 INFO L124 PetriNetUnfolderBase]: 3979/6248 cut-off events. [2024-10-31 21:55:48,614 INFO L125 PetriNetUnfolderBase]: For 2075/2367 co-relation queries the response was YES. [2024-10-31 21:55:48,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13965 conditions, 6248 events. 3979/6248 cut-off events. For 2075/2367 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37930 event pairs, 3262 based on Foata normal form. 6/4800 useless extension candidates. Maximal degree in co-relation 13858. Up to 5549 conditions per place. [2024-10-31 21:55:48,682 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 35 selfloop transitions, 53 changer transitions 0/100 dead transitions. [2024-10-31 21:55:48,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 739 flow [2024-10-31 21:55:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 21:55:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-31 21:55:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 469 transitions. [2024-10-31 21:55:48,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36640625 [2024-10-31 21:55:48,691 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 482 flow. Second operand 20 states and 469 transitions. [2024-10-31 21:55:48,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 739 flow [2024-10-31 21:55:48,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 650 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-31 21:55:48,707 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 580 flow [2024-10-31 21:55:48,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=580, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2024-10-31 21:55:48,708 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 35 predicate places. [2024-10-31 21:55:48,708 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 580 flow [2024-10-31 21:55:48,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:48,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:48,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:48,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:55:48,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 21:55:48,910 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:48,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341589, now seen corresponding path program 1 times [2024-10-31 21:55:48,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:48,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615320731] [2024-10-31 21:55:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:48,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:49,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:49,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615320731] [2024-10-31 21:55:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615320731] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:49,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:49,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:49,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837803657] [2024-10-31 21:55:49,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:49,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:55:49,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:55:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:55:49,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-10-31 21:55:49,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 580 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:49,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-10-31 21:55:49,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:49,546 INFO L124 PetriNetUnfolderBase]: 2920/4587 cut-off events. [2024-10-31 21:55:49,546 INFO L125 PetriNetUnfolderBase]: For 1216/1444 co-relation queries the response was YES. [2024-10-31 21:55:49,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10159 conditions, 4587 events. 2920/4587 cut-off events. For 1216/1444 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26110 event pairs, 2345 based on Foata normal form. 0/3660 useless extension candidates. Maximal degree in co-relation 5590. Up to 4038 conditions per place. [2024-10-31 21:55:49,579 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 78 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-10-31 21:55:49,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 748 flow [2024-10-31 21:55:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:55:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:55:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-10-31 21:55:49,580 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-10-31 21:55:49,580 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 580 flow. Second operand 4 states and 116 transitions. [2024-10-31 21:55:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 748 flow [2024-10-31 21:55:49,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 551 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-10-31 21:55:49,591 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 395 flow [2024-10-31 21:55:49,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-10-31 21:55:49,592 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2024-10-31 21:55:49,593 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 395 flow [2024-10-31 21:55:49,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:49,593 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:49,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 21:55:49,594 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:49,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341588, now seen corresponding path program 1 times [2024-10-31 21:55:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520668290] [2024-10-31 21:55:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:55:49,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520668290] [2024-10-31 21:55:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520668290] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:49,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:49,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:55:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787208228] [2024-10-31 21:55:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:49,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:49,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:49,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-10-31 21:55:49,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:49,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:49,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-10-31 21:55:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:50,273 INFO L124 PetriNetUnfolderBase]: 2988/4757 cut-off events. [2024-10-31 21:55:50,273 INFO L125 PetriNetUnfolderBase]: For 1149/1509 co-relation queries the response was YES. [2024-10-31 21:55:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10063 conditions, 4757 events. 2988/4757 cut-off events. For 1149/1509 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27630 event pairs, 2214 based on Foata normal form. 0/3612 useless extension candidates. Maximal degree in co-relation 4603. Up to 3896 conditions per place. [2024-10-31 21:55:50,300 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 85 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-10-31 21:55:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 669 flow [2024-10-31 21:55:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:55:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:55:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-10-31 21:55:50,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-10-31 21:55:50,303 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 395 flow. Second operand 6 states and 200 transitions. [2024-10-31 21:55:50,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 669 flow [2024-10-31 21:55:50,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 660 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:55:50,309 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 439 flow [2024-10-31 21:55:50,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-10-31 21:55:50,310 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 27 predicate places. [2024-10-31 21:55:50,310 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 439 flow [2024-10-31 21:55:50,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:50,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:50,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:50,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 21:55:50,311 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:50,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash 26888348, now seen corresponding path program 1 times [2024-10-31 21:55:50,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:50,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225634264] [2024-10-31 21:55:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:55:50,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:50,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225634264] [2024-10-31 21:55:50,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225634264] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:55:50,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:55:50,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:55:50,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637276080] [2024-10-31 21:55:50,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:50,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:55:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:55:50,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:55:50,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-10-31 21:55:50,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:50,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:50,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-10-31 21:55:50,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:55:50,826 INFO L124 PetriNetUnfolderBase]: 2322/4007 cut-off events. [2024-10-31 21:55:50,826 INFO L125 PetriNetUnfolderBase]: For 1162/1418 co-relation queries the response was YES. [2024-10-31 21:55:50,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8596 conditions, 4007 events. 2322/4007 cut-off events. For 1162/1418 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24681 event pairs, 1720 based on Foata normal form. 0/3277 useless extension candidates. Maximal degree in co-relation 4822. Up to 3145 conditions per place. [2024-10-31 21:55:50,846 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 74 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2024-10-31 21:55:50,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 607 flow [2024-10-31 21:55:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:55:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:55:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-10-31 21:55:50,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-10-31 21:55:50,849 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 439 flow. Second operand 5 states and 129 transitions. [2024-10-31 21:55:50,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 607 flow [2024-10-31 21:55:50,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 97 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:55:50,857 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 422 flow [2024-10-31 21:55:50,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-10-31 21:55:50,858 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-10-31 21:55:50,858 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 422 flow [2024-10-31 21:55:50,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:50,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:55:50,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:55:50,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 21:55:50,859 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-31 21:55:50,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:55:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 26888349, now seen corresponding path program 1 times [2024-10-31 21:55:50,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:55:50,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122776253] [2024-10-31 21:55:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:55:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:55:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:55:51,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122776253] [2024-10-31 21:55:51,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122776253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923415034] [2024-10-31 21:55:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:55:51,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:55:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:55:51,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:55:51,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbd12725-ddca-4ec6-9d60-0946b1df48f4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:55:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:55:51,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-31 21:55:51,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:55:51,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:55:51,457 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 21:55:51,523 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 21:55:51,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-10-31 21:55:51,554 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 21:55:51,554 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 21:55:51,699 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-10-31 21:55:51,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-10-31 21:55:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:55:52,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:55:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:55:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923415034] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:55:52,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:55:52,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-10-31 21:55:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350316920] [2024-10-31 21:55:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:55:52,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 21:55:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:55:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 21:55:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-10-31 21:55:53,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-10-31 21:55:53,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:55:53,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:55:53,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-10-31 21:55:53,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand