./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/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_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/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_d664987d-f13b-468b-a708-c8eb50668a76/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 22e95fa30ebde8538537e9926c639bef97cab57433fef0bd6d73df06023fa7d1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:02:30,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:02:30,950 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:02:30,969 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:02:30,970 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:02:31,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:02:31,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:02:31,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:02:31,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:02:31,014 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:02:31,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:02:31,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:02:31,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:02:31,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:02:31,020 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:02:31,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:02:31,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:02:31,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:02:31,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:02:31,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:02:31,025 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:02:31,026 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:02:31,026 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:02:31,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:02:31,027 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:02:31,027 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:02:31,028 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:02:31,028 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:02:31,028 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:02:31,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:02:31,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:02:31,029 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:02:31,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:02:31,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:31,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:02:31,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:02:31,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:02:31,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:02:31,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:02:31,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:02:31,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:02:31,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:02:31,036 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_d664987d-f13b-468b-a708-c8eb50668a76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22e95fa30ebde8538537e9926c639bef97cab57433fef0bd6d73df06023fa7d1 [2024-10-31 22:02:31,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:02:31,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:02:31,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:02:31,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:02:31,354 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:02:31,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i Unable to find full path for "g++" [2024-10-31 22:02:33,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:02:34,013 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:02:34,014 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i [2024-10-31 22:02:34,039 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/data/93c107347/270239582aba46fc9929f1be5ff7e95d/FLAGf52f422cb [2024-10-31 22:02:34,054 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/data/93c107347/270239582aba46fc9929f1be5ff7e95d [2024-10-31 22:02:34,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:02:34,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:02:34,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:34,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:02:34,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:02:34,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:34" (1/1) ... [2024-10-31 22:02:34,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b580bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:34, skipping insertion in model container [2024-10-31 22:02:34,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:34" (1/1) ... [2024-10-31 22:02:34,138 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:02:34,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:34,970 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:02:35,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:35,185 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:02:35,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35 WrapperNode [2024-10-31 22:02:35,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:35,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:35,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:02:35,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:02:35,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,257 INFO L138 Inliner]: procedures = 368, calls = 45, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 89 [2024-10-31 22:02:35,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:35,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:02:35,258 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:02:35,259 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:02:35,274 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,321 INFO L175 MemorySlicer]: Split 30 memory accesses to 3 slices as follows [5, 5, 20]. 67 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [5, 5, 0]. The 12 writes are split as follows [0, 0, 12]. [2024-10-31 22:02:35,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:02:35,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:02:35,353 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:02:35,354 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:02:35,355 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (1/1) ... [2024-10-31 22:02:35,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:35,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:02:35,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d664987d-f13b-468b-a708-c8eb50668a76/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:02:35,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:02:35,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:02:35,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:02:35,445 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:02:35,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:02:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:02:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:02:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:02:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:02:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:02:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:02:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:02:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:02:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:02:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:02:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:02:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-31 22:02:35,449 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-31 22:02:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:02:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:02:35,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:02:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:02:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:02:35,452 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:02:35,618 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:02:35,621 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:02:36,129 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:02:36,130 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:02:36,294 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:02:36,295 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-31 22:02:36,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:36 BoogieIcfgContainer [2024-10-31 22:02:36,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:02:36,297 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:02:36,297 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:02:36,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:02:36,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:02:34" (1/3) ... [2024-10-31 22:02:36,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50526d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:36, skipping insertion in model container [2024-10-31 22:02:36,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:35" (2/3) ... [2024-10-31 22:02:36,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50526d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:36, skipping insertion in model container [2024-10-31 22:02:36,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:36" (3/3) ... [2024-10-31 22:02:36,308 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_04-list2_nr.i [2024-10-31 22:02:36,327 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:02:36,328 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2024-10-31 22:02:36,328 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:02:36,400 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:02:36,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 83 transitions, 170 flow [2024-10-31 22:02:36,498 INFO L124 PetriNetUnfolderBase]: 0/82 cut-off events. [2024-10-31 22:02:36,498 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:36,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 82 events. 0/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 181 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-10-31 22:02:36,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 83 transitions, 170 flow [2024-10-31 22:02:36,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 82 transitions, 167 flow [2024-10-31 22:02:36,524 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:02:36,537 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;@be52d47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:02:36,537 INFO L334 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2024-10-31 22:02:36,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:02:36,540 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-31 22:02:36,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:36,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:36,543 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:02:36,545 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:36,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:36,550 INFO L85 PathProgramCache]: Analyzing trace with hash 11284, now seen corresponding path program 1 times [2024-10-31 22:02:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149430053] [2024-10-31 22:02:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:36,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149430053] [2024-10-31 22:02:36,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149430053] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:36,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:36,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:36,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578901350] [2024-10-31 22:02:36,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:36,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:36,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:37,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 83 [2024-10-31 22:02:37,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:37,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:37,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 83 [2024-10-31 22:02:37,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:37,373 INFO L124 PetriNetUnfolderBase]: 99/370 cut-off events. [2024-10-31 22:02:37,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:37,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 370 events. 99/370 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1819 event pairs, 99 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 564. Up to 223 conditions per place. [2024-10-31 22:02:37,381 INFO L140 encePairwiseOnDemand]: 71/83 looper letters, 28 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2024-10-31 22:02:37,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 215 flow [2024-10-31 22:02:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-10-31 22:02:37,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.678714859437751 [2024-10-31 22:02:37,398 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 167 flow. Second operand 3 states and 169 transitions. [2024-10-31 22:02:37,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 215 flow [2024-10-31 22:02:37,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:37,407 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 158 flow [2024-10-31 22:02:37,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2024-10-31 22:02:37,415 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-10-31 22:02:37,415 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 158 flow [2024-10-31 22:02:37,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:37,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:37,416 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:02:37,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:02:37,417 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:37,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash 11285, now seen corresponding path program 1 times [2024-10-31 22:02:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432259802] [2024-10-31 22:02:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:37,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:37,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432259802] [2024-10-31 22:02:37,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432259802] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:37,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:37,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:02:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938103309] [2024-10-31 22:02:37,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:37,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:37,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:37,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:37,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-10-31 22:02:37,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:37,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:37,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-10-31 22:02:37,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:37,833 INFO L124 PetriNetUnfolderBase]: 99/362 cut-off events. [2024-10-31 22:02:37,833 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:02:37,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 362 events. 99/362 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1810 event pairs, 99 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 572. Up to 223 conditions per place. [2024-10-31 22:02:37,837 INFO L140 encePairwiseOnDemand]: 71/83 looper letters, 24 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-31 22:02:37,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 198 flow [2024-10-31 22:02:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2024-10-31 22:02:37,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7108433734939759 [2024-10-31 22:02:37,839 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 158 flow. Second operand 3 states and 177 transitions. [2024-10-31 22:02:37,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 198 flow [2024-10-31 22:02:37,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:37,842 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 142 flow [2024-10-31 22:02:37,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-10-31 22:02:37,843 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -15 predicate places. [2024-10-31 22:02:37,843 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 142 flow [2024-10-31 22:02:37,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:37,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:37,844 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:02:37,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:02:37,844 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:37,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1840858293, now seen corresponding path program 1 times [2024-10-31 22:02:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719546296] [2024-10-31 22:02:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:37,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:38,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719546296] [2024-10-31 22:02:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719546296] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:38,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:02:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548830649] [2024-10-31 22:02:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:38,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:02:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:02:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:02:38,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 83 [2024-10-31 22:02:38,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:38,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:38,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 83 [2024-10-31 22:02:38,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:38,443 INFO L124 PetriNetUnfolderBase]: 110/392 cut-off events. [2024-10-31 22:02:38,443 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:38,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 392 events. 110/392 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1982 event pairs, 110 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 626. Up to 249 conditions per place. [2024-10-31 22:02:38,447 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 31 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-10-31 22:02:38,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 202 flow [2024-10-31 22:02:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-10-31 22:02:38,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5783132530120482 [2024-10-31 22:02:38,450 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 142 flow. Second operand 4 states and 192 transitions. [2024-10-31 22:02:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 202 flow [2024-10-31 22:02:38,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:38,452 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 132 flow [2024-10-31 22:02:38,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-10-31 22:02:38,454 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -17 predicate places. [2024-10-31 22:02:38,454 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 132 flow [2024-10-31 22:02:38,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:38,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:38,456 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:02:38,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:02:38,456 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:38,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1840858294, now seen corresponding path program 1 times [2024-10-31 22:02:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334003042] [2024-10-31 22:02:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:38,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:38,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334003042] [2024-10-31 22:02:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334003042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:38,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:38,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578805720] [2024-10-31 22:02:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:38,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:38,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 83 [2024-10-31 22:02:38,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:38,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:38,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 83 [2024-10-31 22:02:38,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:39,090 INFO L124 PetriNetUnfolderBase]: 110/387 cut-off events. [2024-10-31 22:02:39,090 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:02:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 387 events. 110/387 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1977 event pairs, 110 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 630. Up to 247 conditions per place. [2024-10-31 22:02:39,093 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 27 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-10-31 22:02:39,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 184 flow [2024-10-31 22:02:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 236 transitions. [2024-10-31 22:02:39,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7108433734939759 [2024-10-31 22:02:39,095 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 132 flow. Second operand 4 states and 236 transitions. [2024-10-31 22:02:39,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 184 flow [2024-10-31 22:02:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:39,099 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 127 flow [2024-10-31 22:02:39,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-10-31 22:02:39,100 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -19 predicate places. [2024-10-31 22:02:39,101 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 127 flow [2024-10-31 22:02:39,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:39,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:39,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:39,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:02:39,103 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:39,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1865543333, now seen corresponding path program 1 times [2024-10-31 22:02:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:39,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467018003] [2024-10-31 22:02:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:39,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:39,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467018003] [2024-10-31 22:02:39,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467018003] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:39,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:39,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:39,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653526464] [2024-10-31 22:02:39,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:39,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:39,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:39,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 83 [2024-10-31 22:02:39,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:39,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:39,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 83 [2024-10-31 22:02:39,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:39,563 INFO L124 PetriNetUnfolderBase]: 110/357 cut-off events. [2024-10-31 22:02:39,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:39,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 357 events. 110/357 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1692 event pairs, 110 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 602. Up to 248 conditions per place. [2024-10-31 22:02:39,565 INFO L140 encePairwiseOnDemand]: 79/83 looper letters, 32 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2024-10-31 22:02:39,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 187 flow [2024-10-31 22:02:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2024-10-31 22:02:39,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7108433734939759 [2024-10-31 22:02:39,567 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 127 flow. Second operand 3 states and 177 transitions. [2024-10-31 22:02:39,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 187 flow [2024-10-31 22:02:39,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:39,569 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 120 flow [2024-10-31 22:02:39,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-10-31 22:02:39,570 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -22 predicate places. [2024-10-31 22:02:39,570 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 120 flow [2024-10-31 22:02:39,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:39,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:39,571 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:39,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:02:39,571 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:39,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1865543332, now seen corresponding path program 1 times [2024-10-31 22:02:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:39,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683825908] [2024-10-31 22:02:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683825908] [2024-10-31 22:02:39,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683825908] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:39,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:39,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:02:39,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333777828] [2024-10-31 22:02:39,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:39,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:02:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:02:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:02:40,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 83 [2024-10-31 22:02:40,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:40,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:40,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 83 [2024-10-31 22:02:40,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:40,251 INFO L124 PetriNetUnfolderBase]: 110/344 cut-off events. [2024-10-31 22:02:40,251 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:40,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 344 events. 110/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1577 event pairs, 110 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 590. Up to 246 conditions per place. [2024-10-31 22:02:40,254 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 31 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2024-10-31 22:02:40,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 180 flow [2024-10-31 22:02:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:02:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-10-31 22:02:40,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5421686746987951 [2024-10-31 22:02:40,256 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 120 flow. Second operand 4 states and 180 transitions. [2024-10-31 22:02:40,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 180 flow [2024-10-31 22:02:40,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:40,258 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 117 flow [2024-10-31 22:02:40,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-10-31 22:02:40,259 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -23 predicate places. [2024-10-31 22:02:40,259 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 117 flow [2024-10-31 22:02:40,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:40,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:40,260 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:40,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:02:40,261 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:40,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2094825083, now seen corresponding path program 1 times [2024-10-31 22:02:40,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:40,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446653927] [2024-10-31 22:02:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:40,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:41,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:41,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446653927] [2024-10-31 22:02:41,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446653927] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:41,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:41,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:02:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690457505] [2024-10-31 22:02:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:41,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:02:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:02:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:02:42,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 83 [2024-10-31 22:02:42,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 117 flow. Second operand has 13 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:42,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 83 [2024-10-31 22:02:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:43,517 INFO L124 PetriNetUnfolderBase]: 167/488 cut-off events. [2024-10-31 22:02:43,517 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:02:43,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 488 events. 167/488 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2508 event pairs, 6 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 857. Up to 180 conditions per place. [2024-10-31 22:02:43,521 INFO L140 encePairwiseOnDemand]: 70/83 looper letters, 61 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-10-31 22:02:43,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 341 flow [2024-10-31 22:02:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:02:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:02:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 456 transitions. [2024-10-31 22:02:43,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4994523548740416 [2024-10-31 22:02:43,524 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 117 flow. Second operand 11 states and 456 transitions. [2024-10-31 22:02:43,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 341 flow [2024-10-31 22:02:43,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 338 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:02:43,530 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 171 flow [2024-10-31 22:02:43,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=171, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-10-31 22:02:43,532 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -14 predicate places. [2024-10-31 22:02:43,532 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 171 flow [2024-10-31 22:02:43,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 35.15384615384615) internal successors, (457), 13 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:43,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:43,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:43,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:02:43,533 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:43,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:43,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2094825082, now seen corresponding path program 1 times [2024-10-31 22:02:43,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:43,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029377379] [2024-10-31 22:02:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:44,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:44,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029377379] [2024-10-31 22:02:44,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029377379] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:44,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:44,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:02:44,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671193957] [2024-10-31 22:02:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:44,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:02:44,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:02:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:02:45,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 83 [2024-10-31 22:02:45,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 171 flow. Second operand has 9 states, 9 states have (on average 42.666666666666664) internal successors, (384), 9 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:45,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:45,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 83 [2024-10-31 22:02:45,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:46,256 INFO L124 PetriNetUnfolderBase]: 176/487 cut-off events. [2024-10-31 22:02:46,257 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-10-31 22:02:46,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 487 events. 176/487 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2507 event pairs, 2 based on Foata normal form. 15/445 useless extension candidates. Maximal degree in co-relation 993. Up to 247 conditions per place. [2024-10-31 22:02:46,261 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 65 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-10-31 22:02:46,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 403 flow [2024-10-31 22:02:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:02:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:02:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 448 transitions. [2024-10-31 22:02:46,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5997322623828648 [2024-10-31 22:02:46,267 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 171 flow. Second operand 9 states and 448 transitions. [2024-10-31 22:02:46,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 403 flow [2024-10-31 22:02:46,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 395 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:46,271 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 201 flow [2024-10-31 22:02:46,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-10-31 22:02:46,272 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -12 predicate places. [2024-10-31 22:02:46,272 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 201 flow [2024-10-31 22:02:46,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 42.666666666666664) internal successors, (384), 9 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:46,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:46,273 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:46,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:02:46,274 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:46,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2128602727, now seen corresponding path program 1 times [2024-10-31 22:02:46,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:46,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760672076] [2024-10-31 22:02:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:47,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:47,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760672076] [2024-10-31 22:02:47,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760672076] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:47,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:47,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:02:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535889812] [2024-10-31 22:02:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:47,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:02:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:02:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:02:47,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 83 [2024-10-31 22:02:47,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 44.77777777777778) internal successors, (403), 9 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:47,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:47,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 83 [2024-10-31 22:02:47,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:48,274 INFO L124 PetriNetUnfolderBase]: 166/466 cut-off events. [2024-10-31 22:02:48,275 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-10-31 22:02:48,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 466 events. 166/466 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2378 event pairs, 42 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 986. Up to 184 conditions per place. [2024-10-31 22:02:48,278 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 70 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2024-10-31 22:02:48,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 465 flow [2024-10-31 22:02:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:02:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:02:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 516 transitions. [2024-10-31 22:02:48,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216867469879518 [2024-10-31 22:02:48,280 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 201 flow. Second operand 10 states and 516 transitions. [2024-10-31 22:02:48,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 465 flow [2024-10-31 22:02:48,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 452 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-31 22:02:48,284 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 244 flow [2024-10-31 22:02:48,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-10-31 22:02:48,285 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-10-31 22:02:48,285 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 244 flow [2024-10-31 22:02:48,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.77777777777778) internal successors, (403), 9 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:48,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:48,286 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:48,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:02:48,287 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:48,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1460892621, now seen corresponding path program 1 times [2024-10-31 22:02:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170485708] [2024-10-31 22:02:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:48,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:48,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170485708] [2024-10-31 22:02:48,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170485708] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:48,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:48,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:48,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763001502] [2024-10-31 22:02:48,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:48,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:48,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:48,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:48,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:48,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 83 [2024-10-31 22:02:48,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:48,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:48,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 83 [2024-10-31 22:02:48,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:48,570 INFO L124 PetriNetUnfolderBase]: 105/347 cut-off events. [2024-10-31 22:02:48,570 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-31 22:02:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 347 events. 105/347 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1757 event pairs, 43 based on Foata normal form. 6/335 useless extension candidates. Maximal degree in co-relation 750. Up to 174 conditions per place. [2024-10-31 22:02:48,573 INFO L140 encePairwiseOnDemand]: 77/83 looper letters, 48 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2024-10-31 22:02:48,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 390 flow [2024-10-31 22:02:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:02:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2024-10-31 22:02:48,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8554216867469879 [2024-10-31 22:02:48,575 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 244 flow. Second operand 3 states and 213 transitions. [2024-10-31 22:02:48,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 390 flow [2024-10-31 22:02:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 356 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:02:48,581 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 226 flow [2024-10-31 22:02:48,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2024-10-31 22:02:48,581 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -9 predicate places. [2024-10-31 22:02:48,582 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 226 flow [2024-10-31 22:02:48,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:48,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:48,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:48,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:02:48,584 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:48,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1711614886, now seen corresponding path program 1 times [2024-10-31 22:02:48,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:48,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652142202] [2024-10-31 22:02:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:48,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652142202] [2024-10-31 22:02:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652142202] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:48,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:48,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473569024] [2024-10-31 22:02:48,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:48,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:48,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:49,006 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 83 [2024-10-31 22:02:49,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:49,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:49,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 83 [2024-10-31 22:02:49,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:49,179 INFO L124 PetriNetUnfolderBase]: 140/446 cut-off events. [2024-10-31 22:02:49,180 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-10-31 22:02:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 446 events. 140/446 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2392 event pairs, 14 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 987. Up to 183 conditions per place. [2024-10-31 22:02:49,183 INFO L140 encePairwiseOnDemand]: 76/83 looper letters, 58 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-10-31 22:02:49,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 449 flow [2024-10-31 22:02:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:02:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2024-10-31 22:02:49,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7349397590361446 [2024-10-31 22:02:49,186 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 226 flow. Second operand 5 states and 305 transitions. [2024-10-31 22:02:49,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 449 flow [2024-10-31 22:02:49,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 88 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:02:49,191 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 273 flow [2024-10-31 22:02:49,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-10-31 22:02:49,191 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-10-31 22:02:49,191 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 273 flow [2024-10-31 22:02:49,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:49,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:49,192 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:49,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:02:49,192 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:49,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1711614887, now seen corresponding path program 1 times [2024-10-31 22:02:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:49,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292810368] [2024-10-31 22:02:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:49,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:49,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:49,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292810368] [2024-10-31 22:02:49,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292810368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:49,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:49,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:02:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358909011] [2024-10-31 22:02:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:49,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:02:49,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:02:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:02:49,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 83 [2024-10-31 22:02:49,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:49,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:49,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 83 [2024-10-31 22:02:49,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:49,805 INFO L124 PetriNetUnfolderBase]: 140/436 cut-off events. [2024-10-31 22:02:49,805 INFO L125 PetriNetUnfolderBase]: For 246/246 co-relation queries the response was YES. [2024-10-31 22:02:49,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 436 events. 140/436 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2274 event pairs, 58 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 1048. Up to 191 conditions per place. [2024-10-31 22:02:49,808 INFO L140 encePairwiseOnDemand]: 71/83 looper letters, 48 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-10-31 22:02:49,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 463 flow [2024-10-31 22:02:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:02:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:02:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 303 transitions. [2024-10-31 22:02:49,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.608433734939759 [2024-10-31 22:02:49,810 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 273 flow. Second operand 6 states and 303 transitions. [2024-10-31 22:02:49,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 463 flow [2024-10-31 22:02:49,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 463 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:02:49,815 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 349 flow [2024-10-31 22:02:49,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-10-31 22:02:49,817 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 4 predicate places. [2024-10-31 22:02:49,817 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 349 flow [2024-10-31 22:02:49,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:49,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:49,818 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:49,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:02:49,819 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:49,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash -38564856, now seen corresponding path program 1 times [2024-10-31 22:02:49,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:49,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432040462] [2024-10-31 22:02:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:50,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432040462] [2024-10-31 22:02:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432040462] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:50,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:50,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-31 22:02:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48344425] [2024-10-31 22:02:50,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:50,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:02:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:02:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:02:52,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 83 [2024-10-31 22:02:52,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 349 flow. Second operand has 14 states, 14 states have (on average 34.5) internal successors, (483), 14 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:52,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:52,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 83 [2024-10-31 22:02:52,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:53,341 INFO L124 PetriNetUnfolderBase]: 167/474 cut-off events. [2024-10-31 22:02:53,341 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2024-10-31 22:02:53,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 474 events. 167/474 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2446 event pairs, 12 based on Foata normal form. 6/468 useless extension candidates. Maximal degree in co-relation 1365. Up to 76 conditions per place. [2024-10-31 22:02:53,344 INFO L140 encePairwiseOnDemand]: 67/83 looper letters, 73 selfloop transitions, 49 changer transitions 2/137 dead transitions. [2024-10-31 22:02:53,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 137 transitions, 893 flow [2024-10-31 22:02:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-31 22:02:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-31 22:02:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 834 transitions. [2024-10-31 22:02:53,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45673603504928806 [2024-10-31 22:02:53,348 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 349 flow. Second operand 22 states and 834 transitions. [2024-10-31 22:02:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 137 transitions, 893 flow [2024-10-31 22:02:53,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 137 transitions, 856 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-31 22:02:53,354 INFO L231 Difference]: Finished difference. Result has 109 places, 88 transitions, 550 flow [2024-10-31 22:02:53,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=550, PETRI_PLACES=109, PETRI_TRANSITIONS=88} [2024-10-31 22:02:53,355 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 23 predicate places. [2024-10-31 22:02:53,355 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 88 transitions, 550 flow [2024-10-31 22:02:53,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.5) internal successors, (483), 14 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:53,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:53,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:53,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:02:53,356 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:53,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2004021681, now seen corresponding path program 1 times [2024-10-31 22:02:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473443140] [2024-10-31 22:02:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:53,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:54,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473443140] [2024-10-31 22:02:54,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473443140] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:54,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:54,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:02:54,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822906651] [2024-10-31 22:02:54,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:54,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:02:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:02:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:02:54,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 83 [2024-10-31 22:02:54,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 88 transitions, 550 flow. Second operand has 13 states, 13 states have (on average 36.61538461538461) internal successors, (476), 13 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:54,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:54,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 83 [2024-10-31 22:02:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:55,391 INFO L124 PetriNetUnfolderBase]: 147/453 cut-off events. [2024-10-31 22:02:55,392 INFO L125 PetriNetUnfolderBase]: For 754/754 co-relation queries the response was YES. [2024-10-31 22:02:55,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 453 events. 147/453 cut-off events. For 754/754 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2412 event pairs, 27 based on Foata normal form. 6/443 useless extension candidates. Maximal degree in co-relation 1380. Up to 72 conditions per place. [2024-10-31 22:02:55,396 INFO L140 encePairwiseOnDemand]: 69/83 looper letters, 62 selfloop transitions, 40 changer transitions 0/117 dead transitions. [2024-10-31 22:02:55,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 117 transitions, 846 flow [2024-10-31 22:02:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:02:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:02:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 499 transitions. [2024-10-31 22:02:55,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.501004016064257 [2024-10-31 22:02:55,399 INFO L175 Difference]: Start difference. First operand has 109 places, 88 transitions, 550 flow. Second operand 12 states and 499 transitions. [2024-10-31 22:02:55,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 117 transitions, 846 flow [2024-10-31 22:02:55,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 117 transitions, 797 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-10-31 22:02:55,408 INFO L231 Difference]: Finished difference. Result has 112 places, 88 transitions, 602 flow [2024-10-31 22:02:55,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=602, PETRI_PLACES=112, PETRI_TRANSITIONS=88} [2024-10-31 22:02:55,408 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 26 predicate places. [2024-10-31 22:02:55,409 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 88 transitions, 602 flow [2024-10-31 22:02:55,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 36.61538461538461) internal successors, (476), 13 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:55,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:55,409 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:55,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:02:55,413 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:55,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1245081057, now seen corresponding path program 1 times [2024-10-31 22:02:55,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:55,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533084202] [2024-10-31 22:02:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:55,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:56,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533084202] [2024-10-31 22:02:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533084202] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:56,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:56,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:02:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016337979] [2024-10-31 22:02:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:56,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:02:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:02:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:02:57,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 83 [2024-10-31 22:02:57,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 88 transitions, 602 flow. Second operand has 13 states, 13 states have (on average 35.53846153846154) internal successors, (462), 13 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:57,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:02:57,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 83 [2024-10-31 22:02:57,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:02:58,151 INFO L124 PetriNetUnfolderBase]: 185/545 cut-off events. [2024-10-31 22:02:58,151 INFO L125 PetriNetUnfolderBase]: For 1222/1222 co-relation queries the response was YES. [2024-10-31 22:02:58,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 545 events. 185/545 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3026 event pairs, 17 based on Foata normal form. 31/574 useless extension candidates. Maximal degree in co-relation 1767. Up to 97 conditions per place. [2024-10-31 22:02:58,157 INFO L140 encePairwiseOnDemand]: 66/83 looper letters, 98 selfloop transitions, 38 changer transitions 0/148 dead transitions. [2024-10-31 22:02:58,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 148 transitions, 1183 flow [2024-10-31 22:02:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:02:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-31 22:02:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 658 transitions. [2024-10-31 22:02:58,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954819277108434 [2024-10-31 22:02:58,161 INFO L175 Difference]: Start difference. First operand has 112 places, 88 transitions, 602 flow. Second operand 16 states and 658 transitions. [2024-10-31 22:02:58,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 148 transitions, 1183 flow [2024-10-31 22:02:58,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1067 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-10-31 22:02:58,171 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 687 flow [2024-10-31 22:02:58,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=687, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2024-10-31 22:02:58,172 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2024-10-31 22:02:58,172 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 687 flow [2024-10-31 22:02:58,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 35.53846153846154) internal successors, (462), 13 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:02:58,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:02:58,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:58,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:02:58,173 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2024-10-31 22:02:58,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1245081056, now seen corresponding path program 1 times [2024-10-31 22:02:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899728959] [2024-10-31 22:02:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:59,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:59,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899728959] [2024-10-31 22:02:59,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899728959] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:59,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:59,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:02:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987867521] [2024-10-31 22:02:59,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:59,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:02:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:02:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156