./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI --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 573c853979782f78b60122afde2824ab47c3f9d6394b4ee74285d458320f7321 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:05:12,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:05:12,773 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:05:12,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:05:12,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:05:12,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:05:12,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:05:12,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:05:12,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:05:12,828 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:05:12,829 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:05:12,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:05:12,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:05:12,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:05:12,834 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:05:12,834 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:05:12,835 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:05:12,835 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:05:12,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:05:12,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:05:12,836 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:05:12,837 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:05:12,838 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:05:12,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:05:12,838 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:05:12,839 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:05:12,839 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:05:12,840 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:05:12,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:05:12,841 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:05:12,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:05:12,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:05:12,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:12,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:05:12,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:05:12,844 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:05:12,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:05:12,844 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:05:12,845 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:05:12,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:05:12,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:05:12,846 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_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 573c853979782f78b60122afde2824ab47c3f9d6394b4ee74285d458320f7321 [2023-11-24 22:05:13,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:05:13,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:05:13,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:05:13,179 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:05:13,179 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:05:13,181 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i [2023-11-24 22:05:16,573 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:05:17,046 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:05:17,056 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc-deref.i [2023-11-24 22:05:17,088 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/data/3139b2e28/400388f9984f4017a9aa9b1f9b8d734e/FLAG13fd3793f [2023-11-24 22:05:17,110 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/data/3139b2e28/400388f9984f4017a9aa9b1f9b8d734e [2023-11-24 22:05:17,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:05:17,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:05:17,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:17,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:05:17,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:05:17,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:17" (1/1) ... [2023-11-24 22:05:17,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac21336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:17, skipping insertion in model container [2023-11-24 22:05:17,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:17" (1/1) ... [2023-11-24 22:05:17,214 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:05:17,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:17,994 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:05:18,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:18,155 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:05:18,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18 WrapperNode [2023-11-24 22:05:18,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:18,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:18,159 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:05:18,159 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:05:18,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,234 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,279 INFO L138 Inliner]: procedures = 371, calls = 43, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 194 [2023-11-24 22:05:18,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:18,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:05:18,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:05:18,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:05:18,294 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,300 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,350 INFO L175 MemorySlicer]: Split 40 memory accesses to 4 slices as follows [1, 1, 9, 29]. 73 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 27 writes are split as follows [1, 1, 3, 22]. [2023-11-24 22:05:18,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:05:18,402 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:05:18,402 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:05:18,402 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:05:18,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (1/1) ... [2023-11-24 22:05:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:18,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:05:18,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:05:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:05:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 22:05:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 22:05:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 22:05:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 22:05:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:05:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 22:05:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:05:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:05:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:05:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:05:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:05:18,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:05:18,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:05:18,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:05:18,525 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 22:05:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:05:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:05:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 22:05:18,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 22:05:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 22:05:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 22:05:18,527 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 22:05:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 22:05:18,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:05:18,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:05:18,534 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 22:05:18,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:05:18,844 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:05:19,591 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:05:20,015 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:05:20,015 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:05:20,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:20 BoogieIcfgContainer [2023-11-24 22:05:20,017 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:05:20,020 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:05:20,021 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:05:20,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:05:20,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:05:17" (1/3) ... [2023-11-24 22:05:20,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54085e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:20, skipping insertion in model container [2023-11-24 22:05:20,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:18" (2/3) ... [2023-11-24 22:05:20,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54085e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:20, skipping insertion in model container [2023-11-24 22:05:20,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:20" (3/3) ... [2023-11-24 22:05:20,029 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc-deref.i [2023-11-24 22:05:20,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:05:20,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2023-11-24 22:05:20,053 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:05:20,168 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:05:20,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 266 flow [2023-11-24 22:05:20,320 INFO L124 PetriNetUnfolderBase]: 1/130 cut-off events. [2023-11-24 22:05:20,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:05:20,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 130 events. 1/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 253 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-11-24 22:05:20,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 266 flow [2023-11-24 22:05:20,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 130 transitions, 263 flow [2023-11-24 22:05:20,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:05:20,367 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@414fad90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:05:20,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2023-11-24 22:05:20,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:05:20,379 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 22:05:20,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:05:20,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:20,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 22:05:20,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:20,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 615170, now seen corresponding path program 1 times [2023-11-24 22:05:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648304573] [2023-11-24 22:05:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648304573] [2023-11-24 22:05:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648304573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:20,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:20,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:20,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025838548] [2023-11-24 22:05:20,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:20,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2023-11-24 22:05:20,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 130 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2023-11-24 22:05:20,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:20,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2023-11-24 22:05:20,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:21,262 INFO L124 PetriNetUnfolderBase]: 64/327 cut-off events. [2023-11-24 22:05:21,262 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 22:05:21,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 327 events. 64/327 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1326 event pairs, 63 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 377. Up to 166 conditions per place. [2023-11-24 22:05:21,269 INFO L140 encePairwiseOnDemand]: 128/131 looper letters, 38 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-11-24 22:05:21,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 131 transitions, 345 flow [2023-11-24 22:05:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-11-24 22:05:21,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.806615776081425 [2023-11-24 22:05:21,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-11-24 22:05:21,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-11-24 22:05:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:21,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-11-24 22:05:21,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2023-11-24 22:05:21,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:21,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:21,311 INFO L175 Difference]: Start difference. First operand has 133 places, 130 transitions, 263 flow. Second operand 3 states and 317 transitions. [2023-11-24 22:05:21,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 131 transitions, 345 flow [2023-11-24 22:05:21,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 131 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:21,323 INFO L231 Difference]: Finished difference. Result has 135 places, 131 transitions, 274 flow [2023-11-24 22:05:21,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=135, PETRI_TRANSITIONS=131} [2023-11-24 22:05:21,331 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 2 predicate places. [2023-11-24 22:05:21,331 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 131 transitions, 274 flow [2023-11-24 22:05:21,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2023-11-24 22:05:21,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:21,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 22:05:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:05:21,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:21,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash 19066370, now seen corresponding path program 1 times [2023-11-24 22:05:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362768685] [2023-11-24 22:05:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:21,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:21,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362768685] [2023-11-24 22:05:21,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362768685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812136111] [2023-11-24 22:05:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:21,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:21,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:05:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:21,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:21,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812136111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:21,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:05:21,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-24 22:05:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988031085] [2023-11-24 22:05:21,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:21,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:21,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:21,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2023-11-24 22:05:21,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 131 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 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) [2023-11-24 22:05:21,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:21,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2023-11-24 22:05:21,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:21,997 INFO L124 PetriNetUnfolderBase]: 64/330 cut-off events. [2023-11-24 22:05:21,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:05:21,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 330 events. 64/330 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1319 event pairs, 63 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 502. Up to 166 conditions per place. [2023-11-24 22:05:22,001 INFO L140 encePairwiseOnDemand]: 128/131 looper letters, 38 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-11-24 22:05:22,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 372 flow [2023-11-24 22:05:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:05:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 22:05:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 598 transitions. [2023-11-24 22:05:22,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7608142493638677 [2023-11-24 22:05:22,007 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 598 transitions. [2023-11-24 22:05:22,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 598 transitions. [2023-11-24 22:05:22,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:22,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 598 transitions. [2023-11-24 22:05:22,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 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) [2023-11-24 22:05:22,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 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) [2023-11-24 22:05:22,019 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 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) [2023-11-24 22:05:22,020 INFO L175 Difference]: Start difference. First operand has 135 places, 131 transitions, 274 flow. Second operand 6 states and 598 transitions. [2023-11-24 22:05:22,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 372 flow [2023-11-24 22:05:22,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 134 transitions, 368 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:22,027 INFO L231 Difference]: Finished difference. Result has 142 places, 134 transitions, 306 flow [2023-11-24 22:05:22,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=142, PETRI_TRANSITIONS=134} [2023-11-24 22:05:22,028 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 9 predicate places. [2023-11-24 22:05:22,028 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 134 transitions, 306 flow [2023-11-24 22:05:22,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 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) [2023-11-24 22:05:22,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:22,029 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-24 22:05:22,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 22:05:22,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 22:05:22,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:22,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:22,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1066672898, now seen corresponding path program 2 times [2023-11-24 22:05:22,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:22,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763963109] [2023-11-24 22:05:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:22,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 22:05:22,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:22,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763963109] [2023-11-24 22:05:22,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763963109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:22,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:22,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:22,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859840452] [2023-11-24 22:05:22,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:22,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:22,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:22,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 131 [2023-11-24 22:05:22,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 134 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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) [2023-11-24 22:05:22,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:22,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 131 [2023-11-24 22:05:22,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:22,785 INFO L124 PetriNetUnfolderBase]: 64/319 cut-off events. [2023-11-24 22:05:22,785 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 22:05:22,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 319 events. 64/319 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1261 event pairs, 63 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 487. Up to 165 conditions per place. [2023-11-24 22:05:22,796 INFO L140 encePairwiseOnDemand]: 111/131 looper letters, 38 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2023-11-24 22:05:22,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 124 transitions, 382 flow [2023-11-24 22:05:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-11-24 22:05:22,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7251908396946565 [2023-11-24 22:05:22,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-11-24 22:05:22,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-11-24 22:05:22,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:22,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-11-24 22:05:22,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2023-11-24 22:05:22,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:22,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:22,803 INFO L175 Difference]: Start difference. First operand has 142 places, 134 transitions, 306 flow. Second operand 3 states and 285 transitions. [2023-11-24 22:05:22,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 124 transitions, 382 flow [2023-11-24 22:05:22,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 124 transitions, 368 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:22,811 INFO L231 Difference]: Finished difference. Result has 133 places, 124 transitions, 292 flow [2023-11-24 22:05:22,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=133, PETRI_TRANSITIONS=124} [2023-11-24 22:05:22,813 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 0 predicate places. [2023-11-24 22:05:22,813 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 124 transitions, 292 flow [2023-11-24 22:05:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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) [2023-11-24 22:05:22,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:22,815 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-24 22:05:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:05:22,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:22,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1066672899, now seen corresponding path program 1 times [2023-11-24 22:05:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:22,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375330689] [2023-11-24 22:05:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:22,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:22,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375330689] [2023-11-24 22:05:22,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375330689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992586593] [2023-11-24 22:05:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:22,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:22,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:22,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:05:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 22:05:23,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:23,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:05:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:23,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992586593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:05:23,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:05:23,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-24 22:05:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992123951] [2023-11-24 22:05:23,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:05:23,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 22:05:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:23,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 22:05:23,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 22:05:23,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2023-11-24 22:05:23,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 124 transitions, 292 flow. Second operand has 13 states, 13 states have (on average 93.07692307692308) internal successors, (1210), 13 states have internal predecessors, (1210), 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) [2023-11-24 22:05:23,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:23,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2023-11-24 22:05:23,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:23,350 INFO L124 PetriNetUnfolderBase]: 64/325 cut-off events. [2023-11-24 22:05:23,351 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-24 22:05:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 325 events. 64/325 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1268 event pairs, 63 based on Foata normal form. 6/252 useless extension candidates. Maximal degree in co-relation 492. Up to 166 conditions per place. [2023-11-24 22:05:23,355 INFO L140 encePairwiseOnDemand]: 128/131 looper letters, 38 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2023-11-24 22:05:23,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 130 transitions, 426 flow [2023-11-24 22:05:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 22:05:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 22:05:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1159 transitions. [2023-11-24 22:05:23,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7372773536895675 [2023-11-24 22:05:23,361 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1159 transitions. [2023-11-24 22:05:23,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1159 transitions. [2023-11-24 22:05:23,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:23,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1159 transitions. [2023-11-24 22:05:23,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 12 states have internal predecessors, (1159), 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) [2023-11-24 22:05:23,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 131.0) internal successors, (1703), 13 states have internal predecessors, (1703), 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) [2023-11-24 22:05:23,378 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 131.0) internal successors, (1703), 13 states have internal predecessors, (1703), 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) [2023-11-24 22:05:23,378 INFO L175 Difference]: Start difference. First operand has 133 places, 124 transitions, 292 flow. Second operand 12 states and 1159 transitions. [2023-11-24 22:05:23,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 130 transitions, 426 flow [2023-11-24 22:05:23,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 130 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:05:23,398 INFO L231 Difference]: Finished difference. Result has 148 places, 130 transitions, 356 flow [2023-11-24 22:05:23,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=356, PETRI_PLACES=148, PETRI_TRANSITIONS=130} [2023-11-24 22:05:23,400 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 15 predicate places. [2023-11-24 22:05:23,401 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 130 transitions, 356 flow [2023-11-24 22:05:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 93.07692307692308) internal successors, (1210), 13 states have internal predecessors, (1210), 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) [2023-11-24 22:05:23,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:23,402 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-24 22:05:23,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:23,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba09bcf-5638-4203-ba06-23de11655d1d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:23,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:23,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1200636675, now seen corresponding path program 2 times [2023-11-24 22:05:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:23,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694452613] [2023-11-24 22:05:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694452613] [2023-11-24 22:05:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694452613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:23,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247618509] [2023-11-24 22:05:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:23,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 131 [2023-11-24 22:05:23,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 130 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2023-11-24 22:05:23,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:23,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 131 [2023-11-24 22:05:23,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:24,097 INFO L124 PetriNetUnfolderBase]: 64/315 cut-off events. [2023-11-24 22:05:24,098 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-24 22:05:24,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 315 events. 64/315 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1238 event pairs, 63 based on Foata normal form. 5/246 useless extension candidates. Maximal degree in co-relation 478. Up to 171 conditions per place. [2023-11-24 22:05:24,101 INFO L140 encePairwiseOnDemand]: 111/131 looper letters, 39 selfloop transitions, 10 changer transitions 0/120 dead transitions. [2023-11-24 22:05:24,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 120 transitions, 434 flow [2023-11-24 22:05:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-11-24 22:05:24,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7506361323155216 [2023-11-24 22:05:24,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-11-24 22:05:24,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-11-24 22:05:24,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:24,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-11-24 22:05:24,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2023-11-24 22:05:24,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:24,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:24,108 INFO L175 Difference]: Start difference. First operand has 148 places, 130 transitions, 356 flow. Second operand 3 states and 295 transitions. [2023-11-24 22:05:24,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 120 transitions, 434 flow [2023-11-24 22:05:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 120 transitions, 386 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-24 22:05:24,116 INFO L231 Difference]: Finished difference. Result has 135 places, 120 transitions, 308 flow [2023-11-24 22:05:24,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=135, PETRI_TRANSITIONS=120} [2023-11-24 22:05:24,117 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 2 predicate places. [2023-11-24 22:05:24,117 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 120 transitions, 308 flow [2023-11-24 22:05:24,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2023-11-24 22:05:24,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:24,118 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-24 22:05:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:05:24,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:24,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1534338997, now seen corresponding path program 1 times [2023-11-24 22:05:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:24,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023506613] [2023-11-24 22:05:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:24,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:24,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023506613] [2023-11-24 22:05:24,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023506613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:24,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:24,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375725796] [2023-11-24 22:05:24,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:24,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 131 [2023-11-24 22:05:24,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 120 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 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) [2023-11-24 22:05:24,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:24,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 131 [2023-11-24 22:05:24,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:24,986 INFO L124 PetriNetUnfolderBase]: 77/365 cut-off events. [2023-11-24 22:05:24,986 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-24 22:05:24,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 365 events. 77/365 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1572 event pairs, 55 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 578. Up to 161 conditions per place. [2023-11-24 22:05:24,990 INFO L140 encePairwiseOnDemand]: 120/131 looper letters, 67 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2023-11-24 22:05:24,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 127 transitions, 462 flow [2023-11-24 22:05:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:24,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:05:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 380 transitions. [2023-11-24 22:05:24,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7251908396946565 [2023-11-24 22:05:24,994 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 380 transitions. [2023-11-24 22:05:24,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 380 transitions. [2023-11-24 22:05:24,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:24,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 380 transitions. [2023-11-24 22:05:25,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2023-11-24 22:05:25,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-11-24 22:05:25,032 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-11-24 22:05:25,032 INFO L175 Difference]: Start difference. First operand has 135 places, 120 transitions, 308 flow. Second operand 4 states and 380 transitions. [2023-11-24 22:05:25,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 127 transitions, 462 flow [2023-11-24 22:05:25,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 127 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:05:25,040 INFO L231 Difference]: Finished difference. Result has 131 places, 114 transitions, 291 flow [2023-11-24 22:05:25,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=131, PETRI_TRANSITIONS=114} [2023-11-24 22:05:25,044 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -2 predicate places. [2023-11-24 22:05:25,045 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 114 transitions, 291 flow [2023-11-24 22:05:25,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 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) [2023-11-24 22:05:25,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:25,046 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-24 22:05:25,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:05:25,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:25,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:25,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1534338996, now seen corresponding path program 1 times [2023-11-24 22:05:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:25,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321753940] [2023-11-24 22:05:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:25,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:25,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321753940] [2023-11-24 22:05:25,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321753940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:25,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:25,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:25,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700498825] [2023-11-24 22:05:25,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:25,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:25,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:25,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:25,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:25,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 131 [2023-11-24 22:05:25,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 114 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 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) [2023-11-24 22:05:25,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:25,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 131 [2023-11-24 22:05:25,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:26,176 INFO L124 PetriNetUnfolderBase]: 84/381 cut-off events. [2023-11-24 22:05:26,176 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-24 22:05:26,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 381 events. 84/381 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1711 event pairs, 54 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 630. Up to 144 conditions per place. [2023-11-24 22:05:26,180 INFO L140 encePairwiseOnDemand]: 122/131 looper letters, 66 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-11-24 22:05:26,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 129 transitions, 468 flow [2023-11-24 22:05:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-11-24 22:05:26,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7022900763358778 [2023-11-24 22:05:26,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-11-24 22:05:26,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-11-24 22:05:26,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:26,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-11-24 22:05:26,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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) [2023-11-24 22:05:26,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:26,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:26,188 INFO L175 Difference]: Start difference. First operand has 131 places, 114 transitions, 291 flow. Second operand 5 states and 460 transitions. [2023-11-24 22:05:26,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 129 transitions, 468 flow [2023-11-24 22:05:26,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 129 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:05:26,193 INFO L231 Difference]: Finished difference. Result has 131 places, 112 transitions, 302 flow [2023-11-24 22:05:26,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=131, PETRI_TRANSITIONS=112} [2023-11-24 22:05:26,194 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -2 predicate places. [2023-11-24 22:05:26,194 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 112 transitions, 302 flow [2023-11-24 22:05:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 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) [2023-11-24 22:05:26,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:26,195 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:05:26,195 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:26,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1345356097, now seen corresponding path program 1 times [2023-11-24 22:05:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:26,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049538619] [2023-11-24 22:05:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:26,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:26,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049538619] [2023-11-24 22:05:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049538619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:26,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:26,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:05:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714521969] [2023-11-24 22:05:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:27,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 131 [2023-11-24 22:05:27,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 112 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 66.42857142857143) internal successors, (465), 7 states have internal predecessors, (465), 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) [2023-11-24 22:05:27,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:27,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 131 [2023-11-24 22:05:27,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:27,675 INFO L124 PetriNetUnfolderBase]: 73/348 cut-off events. [2023-11-24 22:05:27,675 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-24 22:05:27,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 348 events. 73/348 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1493 event pairs, 65 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 640. Up to 192 conditions per place. [2023-11-24 22:05:27,680 INFO L140 encePairwiseOnDemand]: 110/131 looper letters, 48 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2023-11-24 22:05:27,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 107 transitions, 420 flow [2023-11-24 22:05:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:05:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 22:05:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 576 transitions. [2023-11-24 22:05:27,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549618320610687 [2023-11-24 22:05:27,684 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 576 transitions. [2023-11-24 22:05:27,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 576 transitions. [2023-11-24 22:05:27,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:27,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 576 transitions. [2023-11-24 22:05:27,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.0) internal successors, (576), 8 states have internal predecessors, (576), 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) [2023-11-24 22:05:27,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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) [2023-11-24 22:05:27,691 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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) [2023-11-24 22:05:27,722 INFO L175 Difference]: Start difference. First operand has 131 places, 112 transitions, 302 flow. Second operand 8 states and 576 transitions. [2023-11-24 22:05:27,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 107 transitions, 420 flow [2023-11-24 22:05:27,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 107 transitions, 413 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:05:27,728 INFO L231 Difference]: Finished difference. Result has 130 places, 107 transitions, 317 flow [2023-11-24 22:05:27,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=130, PETRI_TRANSITIONS=107} [2023-11-24 22:05:27,732 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -3 predicate places. [2023-11-24 22:05:27,732 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 107 transitions, 317 flow [2023-11-24 22:05:27,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.42857142857143) internal successors, (465), 7 states have internal predecessors, (465), 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) [2023-11-24 22:05:27,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:27,733 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:27,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:05:27,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:27,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1345356098, now seen corresponding path program 1 times [2023-11-24 22:05:27,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:27,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325511211] [2023-11-24 22:05:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:27,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:28,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:28,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325511211] [2023-11-24 22:05:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325511211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:28,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:28,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:05:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345418916] [2023-11-24 22:05:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:28,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:29,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 131 [2023-11-24 22:05:29,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 107 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 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) [2023-11-24 22:05:29,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:29,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 131 [2023-11-24 22:05:29,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:29,827 INFO L124 PetriNetUnfolderBase]: 73/346 cut-off events. [2023-11-24 22:05:29,827 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-11-24 22:05:29,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 346 events. 73/346 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1519 event pairs, 65 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 636. Up to 198 conditions per place. [2023-11-24 22:05:29,831 INFO L140 encePairwiseOnDemand]: 118/131 looper letters, 52 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-11-24 22:05:29,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 439 flow [2023-11-24 22:05:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:05:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 22:05:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 535 transitions. [2023-11-24 22:05:29,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5834242093784079 [2023-11-24 22:05:29,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 535 transitions. [2023-11-24 22:05:29,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 535 transitions. [2023-11-24 22:05:29,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:29,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 535 transitions. [2023-11-24 22:05:29,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 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) [2023-11-24 22:05:29,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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) [2023-11-24 22:05:29,841 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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) [2023-11-24 22:05:29,842 INFO L175 Difference]: Start difference. First operand has 130 places, 107 transitions, 317 flow. Second operand 7 states and 535 transitions. [2023-11-24 22:05:29,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 439 flow [2023-11-24 22:05:29,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 105 transitions, 407 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 22:05:29,846 INFO L231 Difference]: Finished difference. Result has 127 places, 105 transitions, 303 flow [2023-11-24 22:05:29,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=127, PETRI_TRANSITIONS=105} [2023-11-24 22:05:29,848 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -6 predicate places. [2023-11-24 22:05:29,848 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 105 transitions, 303 flow [2023-11-24 22:05:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 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) [2023-11-24 22:05:29,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:29,849 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:05:29,849 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash 102074541, now seen corresponding path program 1 times [2023-11-24 22:05:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579493932] [2023-11-24 22:05:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:30,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:30,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579493932] [2023-11-24 22:05:30,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579493932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:30,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:30,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867518386] [2023-11-24 22:05:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:30,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 131 [2023-11-24 22:05:30,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 105 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 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) [2023-11-24 22:05:30,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:30,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 131 [2023-11-24 22:05:30,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:30,908 INFO L124 PetriNetUnfolderBase]: 73/345 cut-off events. [2023-11-24 22:05:30,908 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-24 22:05:30,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 345 events. 73/345 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1506 event pairs, 65 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2023-11-24 22:05:30,913 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 44 selfloop transitions, 11 changer transitions 0/104 dead transitions. [2023-11-24 22:05:30,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 411 flow [2023-11-24 22:05:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 433 transitions. [2023-11-24 22:05:30,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6610687022900763 [2023-11-24 22:05:30,917 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 433 transitions. [2023-11-24 22:05:30,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 433 transitions. [2023-11-24 22:05:30,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:30,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 433 transitions. [2023-11-24 22:05:30,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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) [2023-11-24 22:05:30,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:30,924 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:30,924 INFO L175 Difference]: Start difference. First operand has 127 places, 105 transitions, 303 flow. Second operand 5 states and 433 transitions. [2023-11-24 22:05:30,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 411 flow [2023-11-24 22:05:30,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 104 transitions, 389 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 22:05:30,931 INFO L231 Difference]: Finished difference. Result has 124 places, 104 transitions, 301 flow [2023-11-24 22:05:30,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=124, PETRI_TRANSITIONS=104} [2023-11-24 22:05:30,932 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -9 predicate places. [2023-11-24 22:05:30,933 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 104 transitions, 301 flow [2023-11-24 22:05:30,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 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) [2023-11-24 22:05:30,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:30,934 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:30,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:05:30,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:30,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 102074540, now seen corresponding path program 1 times [2023-11-24 22:05:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:30,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514234237] [2023-11-24 22:05:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:31,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514234237] [2023-11-24 22:05:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514234237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:31,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:31,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752891088] [2023-11-24 22:05:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:31,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:31,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 131 [2023-11-24 22:05:31,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 104 transitions, 301 flow. Second operand has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 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) [2023-11-24 22:05:31,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:31,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 131 [2023-11-24 22:05:31,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:31,784 INFO L124 PetriNetUnfolderBase]: 73/344 cut-off events. [2023-11-24 22:05:31,784 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-24 22:05:31,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 344 events. 73/344 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1506 event pairs, 65 based on Foata normal form. 1/278 useless extension candidates. Maximal degree in co-relation 626. Up to 197 conditions per place. [2023-11-24 22:05:31,788 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 49 selfloop transitions, 11 changer transitions 0/103 dead transitions. [2023-11-24 22:05:31,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 103 transitions, 419 flow [2023-11-24 22:05:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2023-11-24 22:05:31,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305343511450382 [2023-11-24 22:05:31,791 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2023-11-24 22:05:31,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2023-11-24 22:05:31,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:31,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2023-11-24 22:05:31,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 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) [2023-11-24 22:05:31,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:31,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:31,797 INFO L175 Difference]: Start difference. First operand has 124 places, 104 transitions, 301 flow. Second operand 5 states and 413 transitions. [2023-11-24 22:05:31,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 103 transitions, 419 flow [2023-11-24 22:05:31,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 103 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:31,802 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 299 flow [2023-11-24 22:05:31,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2023-11-24 22:05:31,803 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -10 predicate places. [2023-11-24 22:05:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 299 flow [2023-11-24 22:05:31,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 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) [2023-11-24 22:05:31,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:31,804 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 22:05:31,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:31,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 66461605, now seen corresponding path program 1 times [2023-11-24 22:05:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303980971] [2023-11-24 22:05:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:32,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303980971] [2023-11-24 22:05:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303980971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 22:05:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495506043] [2023-11-24 22:05:32,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:33,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 131 [2023-11-24 22:05:33,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 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) [2023-11-24 22:05:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 131 [2023-11-24 22:05:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:33,707 INFO L124 PetriNetUnfolderBase]: 84/372 cut-off events. [2023-11-24 22:05:33,707 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-24 22:05:33,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 372 events. 84/372 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1683 event pairs, 54 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 675. Up to 139 conditions per place. [2023-11-24 22:05:33,711 INFO L140 encePairwiseOnDemand]: 113/131 looper letters, 60 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2023-11-24 22:05:33,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 498 flow [2023-11-24 22:05:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:05:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 22:05:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2023-11-24 22:05:33,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6859323882224646 [2023-11-24 22:05:33,716 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2023-11-24 22:05:33,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2023-11-24 22:05:33,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:33,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2023-11-24 22:05:33,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 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) [2023-11-24 22:05:33,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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) [2023-11-24 22:05:33,723 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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) [2023-11-24 22:05:33,724 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 299 flow. Second operand 7 states and 629 transitions. [2023-11-24 22:05:33,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 498 flow [2023-11-24 22:05:33,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 122 transitions, 476 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:33,729 INFO L231 Difference]: Finished difference. Result has 123 places, 102 transitions, 318 flow [2023-11-24 22:05:33,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=123, PETRI_TRANSITIONS=102} [2023-11-24 22:05:33,731 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -10 predicate places. [2023-11-24 22:05:33,731 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 102 transitions, 318 flow [2023-11-24 22:05:33,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 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) [2023-11-24 22:05:33,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:33,732 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:33,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 22:05:33,733 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:33,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash -669831975, now seen corresponding path program 1 times [2023-11-24 22:05:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:33,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312168196] [2023-11-24 22:05:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:34,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312168196] [2023-11-24 22:05:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312168196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:34,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:34,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 22:05:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146256745] [2023-11-24 22:05:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:34,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:05:34,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:05:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:05:35,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 131 [2023-11-24 22:05:35,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 102 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 76.33333333333333) internal successors, (458), 6 states have internal predecessors, (458), 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) [2023-11-24 22:05:35,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:35,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 131 [2023-11-24 22:05:35,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:35,561 INFO L124 PetriNetUnfolderBase]: 73/331 cut-off events. [2023-11-24 22:05:35,562 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-11-24 22:05:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 331 events. 73/331 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1431 event pairs, 52 based on Foata normal form. 2/276 useless extension candidates. Maximal degree in co-relation 647. Up to 142 conditions per place. [2023-11-24 22:05:35,566 INFO L140 encePairwiseOnDemand]: 113/131 looper letters, 46 selfloop transitions, 16 changer transitions 3/107 dead transitions. [2023-11-24 22:05:35,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 107 transitions, 465 flow [2023-11-24 22:05:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:05:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 22:05:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 572 transitions. [2023-11-24 22:05:35,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623773173391494 [2023-11-24 22:05:35,570 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 572 transitions. [2023-11-24 22:05:35,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 572 transitions. [2023-11-24 22:05:35,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:35,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 572 transitions. [2023-11-24 22:05:35,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.71428571428571) internal successors, (572), 7 states have internal predecessors, (572), 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) [2023-11-24 22:05:35,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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) [2023-11-24 22:05:35,577 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 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) [2023-11-24 22:05:35,578 INFO L175 Difference]: Start difference. First operand has 123 places, 102 transitions, 318 flow. Second operand 7 states and 572 transitions. [2023-11-24 22:05:35,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 107 transitions, 465 flow [2023-11-24 22:05:35,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 107 transitions, 435 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 22:05:35,583 INFO L231 Difference]: Finished difference. Result has 120 places, 98 transitions, 312 flow [2023-11-24 22:05:35,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=312, PETRI_PLACES=120, PETRI_TRANSITIONS=98} [2023-11-24 22:05:35,585 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -13 predicate places. [2023-11-24 22:05:35,585 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 98 transitions, 312 flow [2023-11-24 22:05:35,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.33333333333333) internal successors, (458), 6 states have internal predecessors, (458), 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) [2023-11-24 22:05:35,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:35,586 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:35,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:05:35,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:35,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:35,587 INFO L85 PathProgramCache]: Analyzing trace with hash -669831976, now seen corresponding path program 1 times [2023-11-24 22:05:35,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:35,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865668891] [2023-11-24 22:05:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:35,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:36,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:36,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865668891] [2023-11-24 22:05:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865668891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:36,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:36,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:05:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608716860] [2023-11-24 22:05:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:36,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:36,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 131 [2023-11-24 22:05:36,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 98 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 67.71428571428571) internal successors, (474), 7 states have internal predecessors, (474), 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) [2023-11-24 22:05:36,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:36,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 131 [2023-11-24 22:05:36,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:37,227 INFO L124 PetriNetUnfolderBase]: 73/336 cut-off events. [2023-11-24 22:05:37,227 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-11-24 22:05:37,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 336 events. 73/336 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1468 event pairs, 45 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 659. Up to 111 conditions per place. [2023-11-24 22:05:37,232 INFO L140 encePairwiseOnDemand]: 112/131 looper letters, 55 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2023-11-24 22:05:37,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 104 transitions, 470 flow [2023-11-24 22:05:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:05:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 22:05:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 580 transitions. [2023-11-24 22:05:37,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534351145038168 [2023-11-24 22:05:37,236 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 580 transitions. [2023-11-24 22:05:37,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 580 transitions. [2023-11-24 22:05:37,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:37,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 580 transitions. [2023-11-24 22:05:37,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.5) internal successors, (580), 8 states have internal predecessors, (580), 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) [2023-11-24 22:05:37,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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) [2023-11-24 22:05:37,245 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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) [2023-11-24 22:05:37,245 INFO L175 Difference]: Start difference. First operand has 120 places, 98 transitions, 312 flow. Second operand 8 states and 580 transitions. [2023-11-24 22:05:37,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 104 transitions, 470 flow [2023-11-24 22:05:37,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 104 transitions, 438 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 22:05:37,251 INFO L231 Difference]: Finished difference. Result has 119 places, 96 transitions, 310 flow [2023-11-24 22:05:37,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=310, PETRI_PLACES=119, PETRI_TRANSITIONS=96} [2023-11-24 22:05:37,253 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -14 predicate places. [2023-11-24 22:05:37,253 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 96 transitions, 310 flow [2023-11-24 22:05:37,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.71428571428571) internal successors, (474), 7 states have internal predecessors, (474), 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) [2023-11-24 22:05:37,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:37,254 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 22:05:37,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:37,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 536587469, now seen corresponding path program 1 times [2023-11-24 22:05:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:37,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586539004] [2023-11-24 22:05:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:37,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586539004] [2023-11-24 22:05:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586539004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:37,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:37,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:37,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555488159] [2023-11-24 22:05:37,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:37,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:37,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 131 [2023-11-24 22:05:37,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 96 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 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) [2023-11-24 22:05:37,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:37,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 131 [2023-11-24 22:05:37,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:38,100 INFO L124 PetriNetUnfolderBase]: 73/333 cut-off events. [2023-11-24 22:05:38,100 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2023-11-24 22:05:38,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 333 events. 73/333 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1459 event pairs, 60 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 644. Up to 196 conditions per place. [2023-11-24 22:05:38,104 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 50 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-11-24 22:05:38,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 95 transitions, 430 flow [2023-11-24 22:05:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-11-24 22:05:38,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6290076335877862 [2023-11-24 22:05:38,107 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-11-24 22:05:38,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-11-24 22:05:38,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:38,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-11-24 22:05:38,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 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) [2023-11-24 22:05:38,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:38,112 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:38,112 INFO L175 Difference]: Start difference. First operand has 119 places, 96 transitions, 310 flow. Second operand 5 states and 412 transitions. [2023-11-24 22:05:38,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 95 transitions, 430 flow [2023-11-24 22:05:38,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 95 transitions, 396 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 22:05:38,117 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 296 flow [2023-11-24 22:05:38,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2023-11-24 22:05:38,118 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -18 predicate places. [2023-11-24 22:05:38,118 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 296 flow [2023-11-24 22:05:38,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 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) [2023-11-24 22:05:38,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:38,119 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 22:05:38,119 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:38,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 536587470, now seen corresponding path program 1 times [2023-11-24 22:05:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:38,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910995975] [2023-11-24 22:05:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:38,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:38,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910995975] [2023-11-24 22:05:38,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910995975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:38,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:38,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114219361] [2023-11-24 22:05:38,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:38,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:38,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 131 [2023-11-24 22:05:38,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-11-24 22:05:38,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:38,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 131 [2023-11-24 22:05:38,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:39,247 INFO L124 PetriNetUnfolderBase]: 73/332 cut-off events. [2023-11-24 22:05:39,247 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-11-24 22:05:39,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 332 events. 73/332 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1461 event pairs, 60 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 623. Up to 196 conditions per place. [2023-11-24 22:05:39,251 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 45 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-11-24 22:05:39,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 94 transitions, 406 flow [2023-11-24 22:05:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 432 transitions. [2023-11-24 22:05:39,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595419847328244 [2023-11-24 22:05:39,255 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 432 transitions. [2023-11-24 22:05:39,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 432 transitions. [2023-11-24 22:05:39,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:39,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 432 transitions. [2023-11-24 22:05:39,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 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) [2023-11-24 22:05:39,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:39,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:39,261 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 296 flow. Second operand 5 states and 432 transitions. [2023-11-24 22:05:39,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 94 transitions, 406 flow [2023-11-24 22:05:39,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 94 transitions, 384 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:39,279 INFO L231 Difference]: Finished difference. Result has 114 places, 94 transitions, 294 flow [2023-11-24 22:05:39,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=114, PETRI_TRANSITIONS=94} [2023-11-24 22:05:39,281 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -19 predicate places. [2023-11-24 22:05:39,281 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 94 transitions, 294 flow [2023-11-24 22:05:39,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 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) [2023-11-24 22:05:39,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:39,282 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:39,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 22:05:39,282 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:39,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash 784401102, now seen corresponding path program 1 times [2023-11-24 22:05:39,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:39,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027416600] [2023-11-24 22:05:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:39,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027416600] [2023-11-24 22:05:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027416600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-24 22:05:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616214836] [2023-11-24 22:05:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:42,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 22:05:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 22:05:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:05:47,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 131 [2023-11-24 22:05:47,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 94 transitions, 294 flow. Second operand has 17 states, 17 states have (on average 48.470588235294116) internal successors, (824), 17 states have internal predecessors, (824), 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) [2023-11-24 22:05:47,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:47,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 131 [2023-11-24 22:05:47,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:48,228 INFO L124 PetriNetUnfolderBase]: 73/332 cut-off events. [2023-11-24 22:05:48,229 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-24 22:05:48,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 332 events. 73/332 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1462 event pairs, 45 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 631. Up to 108 conditions per place. [2023-11-24 22:05:48,232 INFO L140 encePairwiseOnDemand]: 110/131 looper letters, 56 selfloop transitions, 21 changer transitions 3/108 dead transitions. [2023-11-24 22:05:48,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 108 transitions, 489 flow [2023-11-24 22:05:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 22:05:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 22:05:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 727 transitions. [2023-11-24 22:05:48,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964013086150491 [2023-11-24 22:05:48,237 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 727 transitions. [2023-11-24 22:05:48,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 727 transitions. [2023-11-24 22:05:48,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:48,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 727 transitions. [2023-11-24 22:05:48,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 51.92857142857143) internal successors, (727), 14 states have internal predecessors, (727), 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) [2023-11-24 22:05:48,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 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) [2023-11-24 22:05:48,245 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 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) [2023-11-24 22:05:48,245 INFO L175 Difference]: Start difference. First operand has 114 places, 94 transitions, 294 flow. Second operand 14 states and 727 transitions. [2023-11-24 22:05:48,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 108 transitions, 489 flow [2023-11-24 22:05:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 108 transitions, 467 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:48,250 INFO L231 Difference]: Finished difference. Result has 121 places, 92 transitions, 310 flow [2023-11-24 22:05:48,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=310, PETRI_PLACES=121, PETRI_TRANSITIONS=92} [2023-11-24 22:05:48,251 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -12 predicate places. [2023-11-24 22:05:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 92 transitions, 310 flow [2023-11-24 22:05:48,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.470588235294116) internal successors, (824), 17 states have internal predecessors, (824), 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) [2023-11-24 22:05:48,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:48,252 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 22:05:48,252 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:48,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 784401101, now seen corresponding path program 1 times [2023-11-24 22:05:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309397295] [2023-11-24 22:05:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:49,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:49,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309397295] [2023-11-24 22:05:49,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309397295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:49,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:49,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 22:05:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273149187] [2023-11-24 22:05:49,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:49,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 22:05:49,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 22:05:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-24 22:05:50,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 131 [2023-11-24 22:05:50,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 92 transitions, 310 flow. Second operand has 10 states, 10 states have (on average 77.5) internal successors, (775), 10 states have internal predecessors, (775), 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) [2023-11-24 22:05:50,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:50,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 131 [2023-11-24 22:05:50,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:51,361 INFO L124 PetriNetUnfolderBase]: 73/331 cut-off events. [2023-11-24 22:05:51,361 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-11-24 22:05:51,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 331 events. 73/331 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1474 event pairs, 45 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 667. Up to 114 conditions per place. [2023-11-24 22:05:51,366 INFO L140 encePairwiseOnDemand]: 118/131 looper letters, 59 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2023-11-24 22:05:51,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 99 transitions, 468 flow [2023-11-24 22:05:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 22:05:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 22:05:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 658 transitions. [2023-11-24 22:05:51,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6278625954198473 [2023-11-24 22:05:51,370 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 658 transitions. [2023-11-24 22:05:51,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 658 transitions. [2023-11-24 22:05:51,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:51,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 658 transitions. [2023-11-24 22:05:51,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 82.25) internal successors, (658), 8 states have internal predecessors, (658), 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) [2023-11-24 22:05:51,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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) [2023-11-24 22:05:51,378 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 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) [2023-11-24 22:05:51,378 INFO L175 Difference]: Start difference. First operand has 121 places, 92 transitions, 310 flow. Second operand 8 states and 658 transitions. [2023-11-24 22:05:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 99 transitions, 468 flow [2023-11-24 22:05:51,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 426 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-24 22:05:51,384 INFO L231 Difference]: Finished difference. Result has 114 places, 91 transitions, 290 flow [2023-11-24 22:05:51,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=290, PETRI_PLACES=114, PETRI_TRANSITIONS=91} [2023-11-24 22:05:51,385 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -19 predicate places. [2023-11-24 22:05:51,385 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 91 transitions, 290 flow [2023-11-24 22:05:51,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 77.5) internal successors, (775), 10 states have internal predecessors, (775), 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) [2023-11-24 22:05:51,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:51,386 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 22:05:51,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:51,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2104762954, now seen corresponding path program 1 times [2023-11-24 22:05:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609721151] [2023-11-24 22:05:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:51,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609721151] [2023-11-24 22:05:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609721151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:51,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844825010] [2023-11-24 22:05:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:51,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:51,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 131 [2023-11-24 22:05:51,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 91 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 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) [2023-11-24 22:05:51,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:51,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 131 [2023-11-24 22:05:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:52,191 INFO L124 PetriNetUnfolderBase]: 82/347 cut-off events. [2023-11-24 22:05:52,192 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-11-24 22:05:52,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 347 events. 82/347 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1566 event pairs, 36 based on Foata normal form. 2/289 useless extension candidates. Maximal degree in co-relation 672. Up to 123 conditions per place. [2023-11-24 22:05:52,196 INFO L140 encePairwiseOnDemand]: 112/131 looper letters, 52 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2023-11-24 22:05:52,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 446 flow [2023-11-24 22:05:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-11-24 22:05:52,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351145038167939 [2023-11-24 22:05:52,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-11-24 22:05:52,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-11-24 22:05:52,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:52,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-11-24 22:05:52,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 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) [2023-11-24 22:05:52,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:52,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:52,205 INFO L175 Difference]: Start difference. First operand has 114 places, 91 transitions, 290 flow. Second operand 5 states and 416 transitions. [2023-11-24 22:05:52,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 446 flow [2023-11-24 22:05:52,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 422 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 22:05:52,211 INFO L231 Difference]: Finished difference. Result has 109 places, 89 transitions, 296 flow [2023-11-24 22:05:52,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=109, PETRI_TRANSITIONS=89} [2023-11-24 22:05:52,212 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -24 predicate places. [2023-11-24 22:05:52,212 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 89 transitions, 296 flow [2023-11-24 22:05:52,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.8) internal successors, (384), 5 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) [2023-11-24 22:05:52,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:52,213 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:52,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 22:05:52,214 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:52,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2104762953, now seen corresponding path program 1 times [2023-11-24 22:05:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:52,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280611927] [2023-11-24 22:05:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280611927] [2023-11-24 22:05:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280611927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:52,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:52,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818476879] [2023-11-24 22:05:52,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:52,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:52,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 131 [2023-11-24 22:05:52,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 89 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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) [2023-11-24 22:05:52,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:52,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 131 [2023-11-24 22:05:52,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:53,108 INFO L124 PetriNetUnfolderBase]: 82/332 cut-off events. [2023-11-24 22:05:53,108 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-24 22:05:53,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 332 events. 82/332 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1451 event pairs, 18 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 675. Up to 161 conditions per place. [2023-11-24 22:05:53,112 INFO L140 encePairwiseOnDemand]: 114/131 looper letters, 49 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2023-11-24 22:05:53,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 96 transitions, 442 flow [2023-11-24 22:05:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:05:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 22:05:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2023-11-24 22:05:53,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665648854961832 [2023-11-24 22:05:53,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2023-11-24 22:05:53,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2023-11-24 22:05:53,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:53,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2023-11-24 22:05:53,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 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) [2023-11-24 22:05:53,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:53,120 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2023-11-24 22:05:53,120 INFO L175 Difference]: Start difference. First operand has 109 places, 89 transitions, 296 flow. Second operand 5 states and 436 transitions. [2023-11-24 22:05:53,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 96 transitions, 442 flow [2023-11-24 22:05:53,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 408 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:53,125 INFO L231 Difference]: Finished difference. Result has 107 places, 87 transitions, 288 flow [2023-11-24 22:05:53,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=107, PETRI_TRANSITIONS=87} [2023-11-24 22:05:53,126 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -26 predicate places. [2023-11-24 22:05:53,126 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 87 transitions, 288 flow [2023-11-24 22:05:53,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 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) [2023-11-24 22:05:53,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:53,127 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:53,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 22:05:53,128 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:53,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:53,128 INFO L85 PathProgramCache]: Analyzing trace with hash -693714554, now seen corresponding path program 1 times [2023-11-24 22:05:53,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:53,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743365831] [2023-11-24 22:05:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:53,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:54,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743365831] [2023-11-24 22:05:54,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743365831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:54,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:54,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 22:05:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736171581] [2023-11-24 22:05:54,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 22:05:54,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 22:05:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:05:55,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 131 [2023-11-24 22:05:55,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 87 transitions, 288 flow. Second operand has 11 states, 11 states have (on average 73.9090909090909) internal successors, (813), 11 states have internal predecessors, (813), 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) [2023-11-24 22:05:55,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:55,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 131 [2023-11-24 22:05:55,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:55,482 INFO L124 PetriNetUnfolderBase]: 73/326 cut-off events. [2023-11-24 22:05:55,483 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-24 22:05:55,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 326 events. 73/326 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1458 event pairs, 45 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 638. Up to 125 conditions per place. [2023-11-24 22:05:55,487 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 61 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-11-24 22:05:55,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 94 transitions, 448 flow [2023-11-24 22:05:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:05:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2023-11-24 22:05:55,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545801526717557 [2023-11-24 22:05:55,491 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2023-11-24 22:05:55,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2023-11-24 22:05:55,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:55,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2023-11-24 22:05:55,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2023-11-24 22:05:55,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-11-24 22:05:55,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-11-24 22:05:55,519 INFO L175 Difference]: Start difference. First operand has 107 places, 87 transitions, 288 flow. Second operand 4 states and 343 transitions. [2023-11-24 22:05:55,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 94 transitions, 448 flow [2023-11-24 22:05:55,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 94 transitions, 418 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 22:05:55,524 INFO L231 Difference]: Finished difference. Result has 105 places, 86 transitions, 278 flow [2023-11-24 22:05:55,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=105, PETRI_TRANSITIONS=86} [2023-11-24 22:05:55,525 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -28 predicate places. [2023-11-24 22:05:55,525 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 86 transitions, 278 flow [2023-11-24 22:05:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.9090909090909) internal successors, (813), 11 states have internal predecessors, (813), 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) [2023-11-24 22:05:55,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:55,526 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:55,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 22:05:55,527 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:55,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash -693714553, now seen corresponding path program 1 times [2023-11-24 22:05:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:55,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299648472] [2023-11-24 22:05:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:55,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:56,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299648472] [2023-11-24 22:05:56,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299648472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:56,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:56,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:05:56,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632533702] [2023-11-24 22:05:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:56,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 22:05:56,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 22:05:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:05:56,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 131 [2023-11-24 22:05:56,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 86 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 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) [2023-11-24 22:05:56,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:56,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 131 [2023-11-24 22:05:56,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:56,759 INFO L124 PetriNetUnfolderBase]: 73/325 cut-off events. [2023-11-24 22:05:56,760 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-11-24 22:05:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 325 events. 73/325 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1460 event pairs, 45 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 623. Up to 120 conditions per place. [2023-11-24 22:05:56,763 INFO L140 encePairwiseOnDemand]: 119/131 looper letters, 51 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2023-11-24 22:05:56,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 93 transitions, 418 flow [2023-11-24 22:05:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:05:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 413 transitions. [2023-11-24 22:05:56,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7881679389312977 [2023-11-24 22:05:56,766 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 413 transitions. [2023-11-24 22:05:56,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 413 transitions. [2023-11-24 22:05:56,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:56,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 413 transitions. [2023-11-24 22:05:56,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2023-11-24 22:05:56,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-11-24 22:05:56,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 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) [2023-11-24 22:05:56,769 INFO L175 Difference]: Start difference. First operand has 105 places, 86 transitions, 278 flow. Second operand 4 states and 413 transitions. [2023-11-24 22:05:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 93 transitions, 418 flow [2023-11-24 22:05:56,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 93 transitions, 396 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:05:56,774 INFO L231 Difference]: Finished difference. Result has 104 places, 85 transitions, 276 flow [2023-11-24 22:05:56,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=104, PETRI_TRANSITIONS=85} [2023-11-24 22:05:56,775 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -29 predicate places. [2023-11-24 22:05:56,775 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 85 transitions, 276 flow [2023-11-24 22:05:56,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 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) [2023-11-24 22:05:56,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:56,776 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:56,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 22:05:56,776 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:56,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1007675416, now seen corresponding path program 1 times [2023-11-24 22:05:56,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:56,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037627827] [2023-11-24 22:05:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:56,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:56,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037627827] [2023-11-24 22:05:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037627827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:56,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:56,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735339647] [2023-11-24 22:05:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:56,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:56,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:57,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 131 [2023-11-24 22:05:57,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 85 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2023-11-24 22:05:57,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:57,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 131 [2023-11-24 22:05:57,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:57,237 INFO L124 PetriNetUnfolderBase]: 84/343 cut-off events. [2023-11-24 22:05:57,237 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2023-11-24 22:05:57,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 343 events. 84/343 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1546 event pairs, 55 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 681. Up to 198 conditions per place. [2023-11-24 22:05:57,241 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 62 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-24 22:05:57,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 95 transitions, 443 flow [2023-11-24 22:05:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-11-24 22:05:57,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8142493638676844 [2023-11-24 22:05:57,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-11-24 22:05:57,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-11-24 22:05:57,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:57,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-11-24 22:05:57,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:57,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:57,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:57,247 INFO L175 Difference]: Start difference. First operand has 104 places, 85 transitions, 276 flow. Second operand 3 states and 320 transitions. [2023-11-24 22:05:57,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 95 transitions, 443 flow [2023-11-24 22:05:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:05:57,254 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 296 flow [2023-11-24 22:05:57,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2023-11-24 22:05:57,255 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -28 predicate places. [2023-11-24 22:05:57,255 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 296 flow [2023-11-24 22:05:57,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2023-11-24 22:05:57,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 22:05:57,257 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:57,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:57,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1007675415, now seen corresponding path program 1 times [2023-11-24 22:05:57,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:57,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773299118] [2023-11-24 22:05:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:57,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 22:05:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773299118] [2023-11-24 22:05:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773299118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:57,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:57,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413121002] [2023-11-24 22:05:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:57,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:57,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 131 [2023-11-24 22:05:57,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2023-11-24 22:05:57,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:05:57,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 131 [2023-11-24 22:05:57,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:05:57,786 INFO L124 PetriNetUnfolderBase]: 75/315 cut-off events. [2023-11-24 22:05:57,786 INFO L125 PetriNetUnfolderBase]: For 188/190 co-relation queries the response was YES. [2023-11-24 22:05:57,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 315 events. 75/315 cut-off events. For 188/190 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1356 event pairs, 53 based on Foata normal form. 23/300 useless extension candidates. Maximal degree in co-relation 666. Up to 189 conditions per place. [2023-11-24 22:05:57,789 INFO L140 encePairwiseOnDemand]: 127/131 looper letters, 59 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-11-24 22:05:57,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 93 transitions, 437 flow [2023-11-24 22:05:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:05:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-11-24 22:05:57,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8091603053435115 [2023-11-24 22:05:57,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-11-24 22:05:57,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-11-24 22:05:57,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:05:57,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-11-24 22:05:57,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:05:57,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:57,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-24 22:05:57,794 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 296 flow. Second operand 3 states and 318 transitions. [2023-11-24 22:05:57,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 93 transitions, 437 flow [2023-11-24 22:05:57,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 427 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:05:57,799 INFO L231 Difference]: Finished difference. Result has 103 places, 86 transitions, 290 flow [2023-11-24 22:05:57,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2023-11-24 22:05:57,800 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -30 predicate places. [2023-11-24 22:05:57,801 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 290 flow [2023-11-24 22:05:57,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2023-11-24 22:05:57,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:05:57,801 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:57,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 22:05:57,802 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2023-11-24 22:05:57,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1292074789, now seen corresponding path program 1 times [2023-11-24 22:05:57,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:57,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599214039] [2023-11-24 22:05:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat