./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --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 c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:58:16,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:58:16,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:58:16,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:58:16,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:58:16,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:58:16,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:58:16,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:58:16,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:58:16,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:58:16,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:58:16,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:58:16,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:58:16,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:58:16,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:58:16,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:58:16,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:58:16,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:58:16,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:58:16,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:58:16,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:58:16,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:58:16,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:58:16,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:58:16,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:58:16,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:58:16,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:58:16,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:58:16,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:58:16,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:58:16,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:58:16,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:58:16,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:58:16,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:58:16,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:58:16,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:58:16,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:58:16,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:58:16,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:58:16,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:58:16,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:58:16,757 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:58:16,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:58:16,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:58:16,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:58:16,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:58:16,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:58:16,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:58:16,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:58:16,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:58:16,805 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:58:16,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:58:16,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:58:16,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:58:16,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:58:16,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:58:16,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:58:16,808 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:58:16,808 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:58:16,809 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:58:16,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:58:16,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:58:16,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:58:16,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:58:16,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:58:16,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:58:16,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:58:16,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:58:16,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:58:16,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:58:16,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:58:16,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:58:16,814 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:58:16,814 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:58:16,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:58:16,815 INFO L138 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_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c488feb98493d291286969cd9fdbd15fc14c729caece3fe94bd3c70430190936 [2022-11-23 03:58:17,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:58:17,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:58:17,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:58:17,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:58:17,213 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:58:17,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2022-11-23 03:58:20,748 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:58:21,241 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:58:21,242 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2022-11-23 03:58:21,270 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/data/737baf4b6/85422b37e07c4fb2b7b75e1908c7ce58/FLAG5a51fdefe [2022-11-23 03:58:21,293 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/data/737baf4b6/85422b37e07c4fb2b7b75e1908c7ce58 [2022-11-23 03:58:21,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:58:21,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:58:21,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:58:21,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:58:21,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:58:21,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:58:21" (1/1) ... [2022-11-23 03:58:21,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a780837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:21, skipping insertion in model container [2022-11-23 03:58:21,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:58:21" (1/1) ... [2022-11-23 03:58:21,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:58:21,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:58:22,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:58:22,346 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:58:22,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:58:22,558 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:58:22,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22 WrapperNode [2022-11-23 03:58:22,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:58:22,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:58:22,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:58:22,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:58:22,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,621 INFO L138 Inliner]: procedures = 370, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 116 [2022-11-23 03:58:22,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:58:22,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:58:22,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:58:22,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:58:22,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,658 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:58:22,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:58:22,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:58:22,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:58:22,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (1/1) ... [2022-11-23 03:58:22,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:58:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:58:22,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:58:22,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:58:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:58:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 03:58:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:58:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:58:22,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:58:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 03:58:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:58:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:58:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 03:58:22,761 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-23 03:58:22,762 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-23 03:58:22,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:58:22,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:58:22,764 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:58:22,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:58:22,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:58:23,562 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:58:23,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:58:23,573 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 03:58:23,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:58:23 BoogieIcfgContainer [2022-11-23 03:58:23,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:58:23,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:58:23,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:58:23,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:58:23,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:58:21" (1/3) ... [2022-11-23 03:58:23,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4de0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:58:23, skipping insertion in model container [2022-11-23 03:58:23,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:58:22" (2/3) ... [2022-11-23 03:58:23,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4de0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:58:23, skipping insertion in model container [2022-11-23 03:58:23,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:58:23" (3/3) ... [2022-11-23 03:58:23,587 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2022-11-23 03:58:23,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:58:23,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2022-11-23 03:58:23,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:58:23,754 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:58:23,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 187 transitions, 379 flow [2022-11-23 03:58:24,001 INFO L130 PetriNetUnfolder]: 4/186 cut-off events. [2022-11-23 03:58:24,001 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:58:24,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 186 events. 4/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 196 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-23 03:58:24,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 187 places, 187 transitions, 379 flow [2022-11-23 03:58:24,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 186 transitions, 375 flow [2022-11-23 03:58:24,027 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:58:24,055 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 186 transitions, 375 flow [2022-11-23 03:58:24,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 186 transitions, 375 flow [2022-11-23 03:58:24,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 186 transitions, 375 flow [2022-11-23 03:58:24,132 INFO L130 PetriNetUnfolder]: 4/186 cut-off events. [2022-11-23 03:58:24,133 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:58:24,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 186 events. 4/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-23 03:58:24,139 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2022-11-23 03:59:21,416 WARN L233 SmtUtils]: Spent 18.08s on a formula simplification. DAG size of input: 235 DAG size of output: 219 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 03:59:32,394 WARN L233 SmtUtils]: Spent 10.97s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 03:59:46,564 WARN L233 SmtUtils]: Spent 14.16s on a formula simplification. DAG size of input: 235 DAG size of output: 219 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 03:59:52,530 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:00:02,670 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 216 DAG size of output: 200 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:00:17,679 WARN L233 SmtUtils]: Spent 10.91s on a formula simplification. DAG size of input: 216 DAG size of output: 202 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:00:22,731 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 194 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:00:31,836 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 221 DAG size of output: 208 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:00:48,060 WARN L233 SmtUtils]: Spent 11.69s on a formula simplification. DAG size of input: 221 DAG size of output: 210 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:00:53,736 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 202 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:01:12,459 WARN L233 SmtUtils]: Spent 16.98s on a formula simplification. DAG size of input: 240 DAG size of output: 237 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:01:19,942 WARN L233 SmtUtils]: Spent 7.48s on a formula simplification that was a NOOP. DAG size: 231 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:01:41,537 WARN L233 SmtUtils]: Spent 21.59s on a formula simplification. DAG size of input: 249 DAG size of output: 244 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:01:50,092 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 237 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-23 04:01:50,195 INFO L134 LiptonReduction]: Checked pairs total: 10293 [2022-11-23 04:01:50,195 INFO L136 LiptonReduction]: Total number of compositions: 250 [2022-11-23 04:01:50,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 04:01:50,216 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;@5f2e416b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 04:01:50,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-11-23 04:01:50,219 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 04:01:50,220 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 04:01:50,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:50,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 04:01:50,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash 22196, now seen corresponding path program 1 times [2022-11-23 04:01:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:50,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382650262] [2022-11-23 04:01:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:50,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:50,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382650262] [2022-11-23 04:01:50,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382650262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:50,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:01:50,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:01:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040640048] [2022-11-23 04:01:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:50,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 04:01:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 04:01:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 04:01:50,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 437 [2022-11-23 04:01:50,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 123 flow. Second operand has 2 states, 2 states have (on average 184.0) internal successors, (368), 2 states have internal predecessors, (368), 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) [2022-11-23 04:01:50,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:50,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 437 [2022-11-23 04:01:50,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:50,871 INFO L130 PetriNetUnfolder]: 225/511 cut-off events. [2022-11-23 04:01:50,872 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 04:01:50,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 511 events. 225/511 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2607 event pairs, 224 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 983. Up to 485 conditions per place. [2022-11-23 04:01:50,877 INFO L137 encePairwiseOnDemand]: 417/437 looper letters, 36 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2022-11-23 04:01:50,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 155 flow [2022-11-23 04:01:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 04:01:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 04:01:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 422 transitions. [2022-11-23 04:01:50,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.482837528604119 [2022-11-23 04:01:50,895 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 422 transitions. [2022-11-23 04:01:50,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 422 transitions. [2022-11-23 04:01:50,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:50,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 422 transitions. [2022-11-23 04:01:50,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 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) [2022-11-23 04:01:50,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 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) [2022-11-23 04:01:50,911 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 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) [2022-11-23 04:01:50,913 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 123 flow. Second operand 2 states and 422 transitions. [2022-11-23 04:01:50,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 155 flow [2022-11-23 04:01:50,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:01:50,919 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 82 flow [2022-11-23 04:01:50,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-11-23 04:01:50,926 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -20 predicate places. [2022-11-23 04:01:50,926 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 82 flow [2022-11-23 04:01:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.0) internal successors, (368), 2 states have internal predecessors, (368), 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) [2022-11-23 04:01:50,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:50,927 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 04:01:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 04:01:50,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 22201, now seen corresponding path program 1 times [2022-11-23 04:01:50,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:50,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390587610] [2022-11-23 04:01:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:51,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390587610] [2022-11-23 04:01:51,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390587610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:51,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:01:51,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:01:51,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886748692] [2022-11-23 04:01:51,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:51,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:01:51,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:51,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:01:51,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:01:51,108 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 437 [2022-11-23 04:01:51,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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) [2022-11-23 04:01:51,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:51,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 437 [2022-11-23 04:01:51,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:51,462 INFO L130 PetriNetUnfolder]: 225/512 cut-off events. [2022-11-23 04:01:51,462 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 04:01:51,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 512 events. 225/512 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2610 event pairs, 224 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 999. Up to 485 conditions per place. [2022-11-23 04:01:51,466 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 35 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-11-23 04:01:51,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 158 flow [2022-11-23 04:01:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:01:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:01:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-23 04:01:51,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4401220442410374 [2022-11-23 04:01:51,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-23 04:01:51,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-23 04:01:51,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:51,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-23 04:01:51,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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) [2022-11-23 04:01:51,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:01:51,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:01:51,478 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 82 flow. Second operand 3 states and 577 transitions. [2022-11-23 04:01:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 158 flow [2022-11-23 04:01:51,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 04:01:51,480 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 98 flow [2022-11-23 04:01:51,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2022-11-23 04:01:51,481 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -17 predicate places. [2022-11-23 04:01:51,481 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 98 flow [2022-11-23 04:01:51,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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) [2022-11-23 04:01:51,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:51,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 04:01:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 04:01:51,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash 686376, now seen corresponding path program 1 times [2022-11-23 04:01:51,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:51,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421727364] [2022-11-23 04:01:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:51,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:51,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421727364] [2022-11-23 04:01:51,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421727364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823036280] [2022-11-23 04:01:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:51,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:51,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:51,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:51,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 04:01:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 04:01:51,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:51,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:51,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823036280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:51,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:51,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-23 04:01:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534764214] [2022-11-23 04:01:51,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 04:01:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 04:01:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 04:01:51,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-23 04:01:51,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 179.14285714285714) internal successors, (1254), 7 states have internal predecessors, (1254), 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) [2022-11-23 04:01:51,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:51,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-23 04:01:51,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:52,397 INFO L130 PetriNetUnfolder]: 225/515 cut-off events. [2022-11-23 04:01:52,398 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 04:01:52,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 515 events. 225/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2594 event pairs, 224 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 1015. Up to 485 conditions per place. [2022-11-23 04:01:52,401 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 35 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2022-11-23 04:01:52,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 190 flow [2022-11-23 04:01:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 04:01:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 04:01:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1117 transitions. [2022-11-23 04:01:52,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4260106788710908 [2022-11-23 04:01:52,406 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1117 transitions. [2022-11-23 04:01:52,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1117 transitions. [2022-11-23 04:01:52,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:52,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1117 transitions. [2022-11-23 04:01:52,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 186.16666666666666) internal successors, (1117), 6 states have internal predecessors, (1117), 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) [2022-11-23 04:01:52,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 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) [2022-11-23 04:01:52,417 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 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) [2022-11-23 04:01:52,418 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 98 flow. Second operand 6 states and 1117 transitions. [2022-11-23 04:01:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 190 flow [2022-11-23 04:01:52,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 04:01:52,420 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 142 flow [2022-11-23 04:01:52,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2022-11-23 04:01:52,421 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2022-11-23 04:01:52,421 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 142 flow [2022-11-23 04:01:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.14285714285714) internal successors, (1254), 7 states have internal predecessors, (1254), 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) [2022-11-23 04:01:52,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:52,423 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 04:01:52,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:52,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1028851079, now seen corresponding path program 2 times [2022-11-23 04:01:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:52,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45006005] [2022-11-23 04:01:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:52,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:52,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45006005] [2022-11-23 04:01:52,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45006005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:52,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151468796] [2022-11-23 04:01:52,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:01:52,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:52,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:52,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:52,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 04:01:52,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 04:01:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:01:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 04:01:52,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:01:53,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 04:01:53,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151468796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:53,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 04:01:53,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-23 04:01:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161014389] [2022-11-23 04:01:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:53,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:01:53,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:53,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:01:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 04:01:53,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-23 04:01:53,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2022-11-23 04:01:53,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:53,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-23 04:01:53,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:53,525 INFO L130 PetriNetUnfolder]: 212/478 cut-off events. [2022-11-23 04:01:53,526 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 04:01:53,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 478 events. 212/478 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2328 event pairs, 147 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 963. Up to 322 conditions per place. [2022-11-23 04:01:53,530 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-23 04:01:53,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 272 flow [2022-11-23 04:01:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:01:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:01:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2022-11-23 04:01:53,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448512585812357 [2022-11-23 04:01:53,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2022-11-23 04:01:53,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2022-11-23 04:01:53,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:53,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2022-11-23 04:01:53,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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) [2022-11-23 04:01:53,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:01:53,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:01:53,540 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 142 flow. Second operand 3 states and 588 transitions. [2022-11-23 04:01:53,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 272 flow [2022-11-23 04:01:53,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 258 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 04:01:53,545 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 124 flow [2022-11-23 04:01:53,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2022-11-23 04:01:53,547 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2022-11-23 04:01:53,547 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 124 flow [2022-11-23 04:01:53,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2022-11-23 04:01:53,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:53,548 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 04:01:53,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:53,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:53,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1028851080, now seen corresponding path program 1 times [2022-11-23 04:01:53,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:53,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35206734] [2022-11-23 04:01:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:53,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:53,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35206734] [2022-11-23 04:01:53,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35206734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:01:53,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692040315] [2022-11-23 04:01:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:53,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:53,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:01:53,907 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:01:53,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 04:01:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 04:01:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:01:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:54,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:01:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:01:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692040315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:01:54,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:01:54,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 04:01:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720982418] [2022-11-23 04:01:54,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:01:54,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 04:01:54,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 04:01:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 04:01:54,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-23 04:01:54,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 179.07692307692307) internal successors, (2328), 13 states have internal predecessors, (2328), 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) [2022-11-23 04:01:54,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:54,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-23 04:01:54,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:54,813 INFO L130 PetriNetUnfolder]: 209/478 cut-off events. [2022-11-23 04:01:54,813 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-23 04:01:54,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 478 events. 209/478 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2315 event pairs, 208 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 1003. Up to 451 conditions per place. [2022-11-23 04:01:54,816 INFO L137 encePairwiseOnDemand]: 433/437 looper letters, 33 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2022-11-23 04:01:54,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 48 transitions, 248 flow [2022-11-23 04:01:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 04:01:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 04:01:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2192 transitions. [2022-11-23 04:01:54,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41800152555301295 [2022-11-23 04:01:54,869 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2192 transitions. [2022-11-23 04:01:54,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2192 transitions. [2022-11-23 04:01:54,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:54,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2192 transitions. [2022-11-23 04:01:54,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 182.66666666666666) internal successors, (2192), 12 states have internal predecessors, (2192), 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) [2022-11-23 04:01:54,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 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) [2022-11-23 04:01:54,886 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 437.0) internal successors, (5681), 13 states have internal predecessors, (5681), 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) [2022-11-23 04:01:54,886 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 124 flow. Second operand 12 states and 2192 transitions. [2022-11-23 04:01:54,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 48 transitions, 248 flow [2022-11-23 04:01:54,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 04:01:54,889 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 216 flow [2022-11-23 04:01:54,890 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2022-11-23 04:01:54,890 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2022-11-23 04:01:54,890 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 216 flow [2022-11-23 04:01:54,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 179.07692307692307) internal successors, (2328), 13 states have internal predecessors, (2328), 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) [2022-11-23 04:01:54,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:54,892 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-23 04:01:54,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 04:01:55,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:01:55,098 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash 560606232, now seen corresponding path program 2 times [2022-11-23 04:01:55,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:55,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173322432] [2022-11-23 04:01:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:55,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:01:55,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173322432] [2022-11-23 04:01:55,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173322432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:55,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:01:55,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:01:55,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131852053] [2022-11-23 04:01:55,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:01:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:01:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:01:55,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-23 04:01:55,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2022-11-23 04:01:55,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:55,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-23 04:01:55,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:55,837 INFO L130 PetriNetUnfolder]: 212/483 cut-off events. [2022-11-23 04:01:55,838 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-23 04:01:55,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 483 events. 212/483 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2341 event pairs, 147 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 1019. Up to 327 conditions per place. [2022-11-23 04:01:55,841 INFO L137 encePairwiseOnDemand]: 434/437 looper letters, 58 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2022-11-23 04:01:55,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 346 flow [2022-11-23 04:01:55,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:01:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:01:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-11-23 04:01:55,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462242562929062 [2022-11-23 04:01:55,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-11-23 04:01:55,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-11-23 04:01:55,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:55,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-11-23 04:01:55,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2022-11-23 04:01:55,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:01:55,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:01:55,850 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 216 flow. Second operand 3 states and 585 transitions. [2022-11-23 04:01:55,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 346 flow [2022-11-23 04:01:55,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 298 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-23 04:01:55,854 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 150 flow [2022-11-23 04:01:55,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2022-11-23 04:01:55,855 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2022-11-23 04:01:55,855 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 150 flow [2022-11-23 04:01:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2022-11-23 04:01:55,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:55,856 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-23 04:01:55,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 04:01:55,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2106893450, now seen corresponding path program 1 times [2022-11-23 04:01:55,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:55,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593060196] [2022-11-23 04:01:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:55,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:01:57,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593060196] [2022-11-23 04:01:57,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593060196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:57,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:01:57,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:01:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651013203] [2022-11-23 04:01:57,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:57,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:01:57,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:01:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:01:57,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 437 [2022-11-23 04:01:57,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 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) [2022-11-23 04:01:57,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:57,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 437 [2022-11-23 04:01:57,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:57,964 INFO L130 PetriNetUnfolder]: 207/479 cut-off events. [2022-11-23 04:01:57,964 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-11-23 04:01:57,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 479 events. 207/479 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2421 event pairs, 38 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 1000. Up to 257 conditions per place. [2022-11-23 04:01:57,968 INFO L137 encePairwiseOnDemand]: 431/437 looper letters, 63 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2022-11-23 04:01:57,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 341 flow [2022-11-23 04:01:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:01:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:01:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 708 transitions. [2022-11-23 04:01:57,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40503432494279173 [2022-11-23 04:01:57,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 708 transitions. [2022-11-23 04:01:57,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 708 transitions. [2022-11-23 04:01:57,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:57,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 708 transitions. [2022-11-23 04:01:57,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 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) [2022-11-23 04:01:57,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 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) [2022-11-23 04:01:57,979 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 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) [2022-11-23 04:01:57,979 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 150 flow. Second operand 4 states and 708 transitions. [2022-11-23 04:01:57,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 341 flow [2022-11-23 04:01:57,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 04:01:57,985 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 175 flow [2022-11-23 04:01:57,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2022-11-23 04:01:57,987 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2022-11-23 04:01:57,987 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 175 flow [2022-11-23 04:01:57,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 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) [2022-11-23 04:01:57,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:57,988 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-23 04:01:57,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 04:01:57,988 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2106893562, now seen corresponding path program 1 times [2022-11-23 04:01:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:57,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832838570] [2022-11-23 04:01:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:57,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:01:58,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:58,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832838570] [2022-11-23 04:01:58,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832838570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:58,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:01:58,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:01:58,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334512270] [2022-11-23 04:01:58,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:01:58,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:01:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:01:58,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 437 [2022-11-23 04:01:58,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 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) [2022-11-23 04:01:58,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:58,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 437 [2022-11-23 04:01:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:01:59,320 INFO L130 PetriNetUnfolder]: 235/554 cut-off events. [2022-11-23 04:01:59,320 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-23 04:01:59,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 554 events. 235/554 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2827 event pairs, 126 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1220. Up to 273 conditions per place. [2022-11-23 04:01:59,324 INFO L137 encePairwiseOnDemand]: 432/437 looper letters, 73 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2022-11-23 04:01:59,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 399 flow [2022-11-23 04:01:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 04:01:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 04:01:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 893 transitions. [2022-11-23 04:01:59,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40869565217391307 [2022-11-23 04:01:59,327 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 893 transitions. [2022-11-23 04:01:59,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 893 transitions. [2022-11-23 04:01:59,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:01:59,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 893 transitions. [2022-11-23 04:01:59,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 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) [2022-11-23 04:01:59,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 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) [2022-11-23 04:01:59,335 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 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) [2022-11-23 04:01:59,335 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 175 flow. Second operand 5 states and 893 transitions. [2022-11-23 04:01:59,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 399 flow [2022-11-23 04:01:59,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:01:59,338 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 187 flow [2022-11-23 04:01:59,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2022-11-23 04:01:59,339 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2022-11-23 04:01:59,339 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 187 flow [2022-11-23 04:01:59,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 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) [2022-11-23 04:01:59,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:01:59,339 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 04:01:59,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 04:01:59,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:01:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:01:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash -889147155, now seen corresponding path program 1 times [2022-11-23 04:01:59,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:01:59,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129714773] [2022-11-23 04:01:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:01:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:01:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:01:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:01:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:01:59,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129714773] [2022-11-23 04:01:59,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129714773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:01:59,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:01:59,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:01:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150117011] [2022-11-23 04:01:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:01:59,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:01:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:01:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:01:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:01:59,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 437 [2022-11-23 04:01:59,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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) [2022-11-23 04:01:59,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:01:59,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 437 [2022-11-23 04:01:59,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:00,027 INFO L130 PetriNetUnfolder]: 215/519 cut-off events. [2022-11-23 04:02:00,028 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2022-11-23 04:02:00,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 519 events. 215/519 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2786 event pairs, 70 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 1128. Up to 439 conditions per place. [2022-11-23 04:02:00,031 INFO L137 encePairwiseOnDemand]: 435/437 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-11-23 04:02:00,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 316 flow [2022-11-23 04:02:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:02:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:02:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2022-11-23 04:02:00,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4401220442410374 [2022-11-23 04:02:00,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2022-11-23 04:02:00,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2022-11-23 04:02:00,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:00,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2022-11-23 04:02:00,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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) [2022-11-23 04:02:00,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:02:00,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:02:00,040 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 187 flow. Second operand 3 states and 577 transitions. [2022-11-23 04:02:00,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 316 flow [2022-11-23 04:02:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 308 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 04:02:00,042 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 175 flow [2022-11-23 04:02:00,043 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2022-11-23 04:02:00,043 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2022-11-23 04:02:00,044 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 175 flow [2022-11-23 04:02:00,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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) [2022-11-23 04:02:00,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:00,044 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:00,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 04:02:00,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:02:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash -889147186, now seen corresponding path program 1 times [2022-11-23 04:02:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:00,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809348899] [2022-11-23 04:02:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:02:00,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809348899] [2022-11-23 04:02:00,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809348899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:00,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:00,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:02:00,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372439866] [2022-11-23 04:02:00,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:00,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:02:00,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:02:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:02:00,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 437 [2022-11-23 04:02:00,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 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) [2022-11-23 04:02:00,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:00,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 437 [2022-11-23 04:02:00,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:00,639 INFO L130 PetriNetUnfolder]: 239/579 cut-off events. [2022-11-23 04:02:00,639 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-11-23 04:02:00,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 579 events. 239/579 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3276 event pairs, 28 based on Foata normal form. 12/389 useless extension candidates. Maximal degree in co-relation 1259. Up to 413 conditions per place. [2022-11-23 04:02:00,643 INFO L137 encePairwiseOnDemand]: 427/437 looper letters, 58 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2022-11-23 04:02:00,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 364 flow [2022-11-23 04:02:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:02:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:02:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-11-23 04:02:00,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462242562929062 [2022-11-23 04:02:00,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-11-23 04:02:00,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-11-23 04:02:00,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:00,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-11-23 04:02:00,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2022-11-23 04:02:00,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:02:00,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 437.0) internal successors, (1748), 4 states have internal predecessors, (1748), 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) [2022-11-23 04:02:00,652 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 175 flow. Second operand 3 states and 585 transitions. [2022-11-23 04:02:00,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 364 flow [2022-11-23 04:02:00,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:02:00,655 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 252 flow [2022-11-23 04:02:00,656 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2022-11-23 04:02:00,657 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2022-11-23 04:02:00,657 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 252 flow [2022-11-23 04:02:00,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 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) [2022-11-23 04:02:00,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:00,658 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:00,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 04:02:00,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:02:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash -889190775, now seen corresponding path program 1 times [2022-11-23 04:02:00,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:00,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279290252] [2022-11-23 04:02:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:00,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:02:03,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:03,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279290252] [2022-11-23 04:02:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279290252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:03,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:03,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:02:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782902934] [2022-11-23 04:02:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:03,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 04:02:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:03,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 04:02:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 04:02:03,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 437 [2022-11-23 04:02:03,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 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) [2022-11-23 04:02:03,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:03,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 437 [2022-11-23 04:02:03,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:04,399 INFO L130 PetriNetUnfolder]: 279/641 cut-off events. [2022-11-23 04:02:04,399 INFO L131 PetriNetUnfolder]: For 300/301 co-relation queries the response was YES. [2022-11-23 04:02:04,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 641 events. 279/641 cut-off events. For 300/301 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3475 event pairs, 90 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 1600. Up to 282 conditions per place. [2022-11-23 04:02:04,405 INFO L137 encePairwiseOnDemand]: 429/437 looper letters, 77 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2022-11-23 04:02:04,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 540 flow [2022-11-23 04:02:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 04:02:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 04:02:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1182 transitions. [2022-11-23 04:02:04,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38640078457012095 [2022-11-23 04:02:04,410 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1182 transitions. [2022-11-23 04:02:04,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1182 transitions. [2022-11-23 04:02:04,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:04,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1182 transitions. [2022-11-23 04:02:04,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.85714285714286) internal successors, (1182), 7 states have internal predecessors, (1182), 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) [2022-11-23 04:02:04,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 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) [2022-11-23 04:02:04,420 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 437.0) internal successors, (3496), 8 states have internal predecessors, (3496), 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) [2022-11-23 04:02:04,421 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 252 flow. Second operand 7 states and 1182 transitions. [2022-11-23 04:02:04,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 540 flow [2022-11-23 04:02:04,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 04:02:04,426 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 299 flow [2022-11-23 04:02:04,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2022-11-23 04:02:04,427 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2022-11-23 04:02:04,427 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 299 flow [2022-11-23 04:02:04,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 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) [2022-11-23 04:02:04,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:04,428 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:04,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 04:02:04,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:02:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash -889190426, now seen corresponding path program 1 times [2022-11-23 04:02:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160111655] [2022-11-23 04:02:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:04,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:02:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160111655] [2022-11-23 04:02:06,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160111655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:06,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:06,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:02:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491547625] [2022-11-23 04:02:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:06,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 04:02:06,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 04:02:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 04:02:06,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 437 [2022-11-23 04:02:06,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 299 flow. Second operand has 5 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 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) [2022-11-23 04:02:06,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:06,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 437 [2022-11-23 04:02:06,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:07,354 INFO L130 PetriNetUnfolder]: 265/618 cut-off events. [2022-11-23 04:02:07,354 INFO L131 PetriNetUnfolder]: For 335/336 co-relation queries the response was YES. [2022-11-23 04:02:07,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 618 events. 265/618 cut-off events. For 335/336 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3322 event pairs, 130 based on Foata normal form. 0/403 useless extension candidates. Maximal degree in co-relation 1639. Up to 312 conditions per place. [2022-11-23 04:02:07,360 INFO L137 encePairwiseOnDemand]: 430/437 looper letters, 66 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2022-11-23 04:02:07,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 494 flow [2022-11-23 04:02:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 04:02:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 04:02:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 857 transitions. [2022-11-23 04:02:07,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3922196796338673 [2022-11-23 04:02:07,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 857 transitions. [2022-11-23 04:02:07,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 857 transitions. [2022-11-23 04:02:07,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:07,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 857 transitions. [2022-11-23 04:02:07,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 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) [2022-11-23 04:02:07,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 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) [2022-11-23 04:02:07,372 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 437.0) internal successors, (2622), 6 states have internal predecessors, (2622), 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) [2022-11-23 04:02:07,372 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 299 flow. Second operand 5 states and 857 transitions. [2022-11-23 04:02:07,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 494 flow [2022-11-23 04:02:07,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 476 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-23 04:02:07,377 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 293 flow [2022-11-23 04:02:07,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2022-11-23 04:02:07,378 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2022-11-23 04:02:07,378 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 293 flow [2022-11-23 04:02:07,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.4) internal successors, (807), 5 states have internal predecessors, (807), 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) [2022-11-23 04:02:07,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:07,379 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:07,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 04:02:07,380 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:02:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1793757438, now seen corresponding path program 1 times [2022-11-23 04:02:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:07,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144668814] [2022-11-23 04:02:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:02:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 04:02:08,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:02:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144668814] [2022-11-23 04:02:08,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144668814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:02:08,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:02:08,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 04:02:08,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441087320] [2022-11-23 04:02:08,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:02:08,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 04:02:08,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:02:08,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 04:02:08,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 04:02:08,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 437 [2022-11-23 04:02:08,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 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) [2022-11-23 04:02:08,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:02:08,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 437 [2022-11-23 04:02:08,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:02:09,094 INFO L130 PetriNetUnfolder]: 251/589 cut-off events. [2022-11-23 04:02:09,095 INFO L131 PetriNetUnfolder]: For 332/333 co-relation queries the response was YES. [2022-11-23 04:02:09,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 589 events. 251/589 cut-off events. For 332/333 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3164 event pairs, 87 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 1555. Up to 243 conditions per place. [2022-11-23 04:02:09,099 INFO L137 encePairwiseOnDemand]: 429/437 looper letters, 85 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2022-11-23 04:02:09,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 615 flow [2022-11-23 04:02:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 04:02:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 04:02:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1081 transitions. [2022-11-23 04:02:09,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2022-11-23 04:02:09,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1081 transitions. [2022-11-23 04:02:09,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1081 transitions. [2022-11-23 04:02:09,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:02:09,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1081 transitions. [2022-11-23 04:02:09,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 states have internal predecessors, (1081), 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) [2022-11-23 04:02:09,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 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) [2022-11-23 04:02:09,121 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 437.0) internal successors, (3059), 7 states have internal predecessors, (3059), 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) [2022-11-23 04:02:09,121 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 293 flow. Second operand 6 states and 1081 transitions. [2022-11-23 04:02:09,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 615 flow [2022-11-23 04:02:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 101 transitions, 591 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 04:02:09,130 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 360 flow [2022-11-23 04:02:09,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2022-11-23 04:02:09,132 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2022-11-23 04:02:09,132 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 360 flow [2022-11-23 04:02:09,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.33333333333334) internal successors, (1010), 6 states have internal predecessors, (1010), 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) [2022-11-23 04:02:09,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:02:09,133 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:09,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 04:02:09,133 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 04:02:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:02:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1793757411, now seen corresponding path program 1 times [2022-11-23 04:02:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:02:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546079778] [2022-11-23 04:02:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:02:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:02:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 04:02:09,196 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 04:02:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 04:02:09,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 04:02:09,273 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 04:02:09,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2022-11-23 04:02:09,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 52 remaining) [2022-11-23 04:02:09,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 52 remaining) [2022-11-23 04:02:09,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2022-11-23 04:02:09,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2022-11-23 04:02:09,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2022-11-23 04:02:09,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2022-11-23 04:02:09,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2022-11-23 04:02:09,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2022-11-23 04:02:09,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2022-11-23 04:02:09,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2022-11-23 04:02:09,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2022-11-23 04:02:09,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2022-11-23 04:02:09,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2022-11-23 04:02:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2022-11-23 04:02:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2022-11-23 04:02:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2022-11-23 04:02:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2022-11-23 04:02:09,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2022-11-23 04:02:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2022-11-23 04:02:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2022-11-23 04:02:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2022-11-23 04:02:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2022-11-23 04:02:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2022-11-23 04:02:09,281 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2022-11-23 04:02:09,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2022-11-23 04:02:09,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2022-11-23 04:02:09,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (24 of 52 remaining) [2022-11-23 04:02:09,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 52 remaining) [2022-11-23 04:02:09,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2022-11-23 04:02:09,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2022-11-23 04:02:09,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2022-11-23 04:02:09,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2022-11-23 04:02:09,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2022-11-23 04:02:09,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2022-11-23 04:02:09,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2022-11-23 04:02:09,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2022-11-23 04:02:09,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2022-11-23 04:02:09,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2022-11-23 04:02:09,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2022-11-23 04:02:09,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2022-11-23 04:02:09,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2022-11-23 04:02:09,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2022-11-23 04:02:09,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2022-11-23 04:02:09,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2022-11-23 04:02:09,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2022-11-23 04:02:09,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 52 remaining) [2022-11-23 04:02:09,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2022-11-23 04:02:09,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2022-11-23 04:02:09,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2022-11-23 04:02:09,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2022-11-23 04:02:09,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2022-11-23 04:02:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 04:02:09,287 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:02:09,295 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 04:02:09,295 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 04:02:09,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:02:09 BasicIcfg [2022-11-23 04:02:09,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 04:02:09,363 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 04:02:09,363 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 04:02:09,363 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 04:02:09,364 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:58:23" (3/4) ... [2022-11-23 04:02:09,366 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 04:02:09,434 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/witness.graphml [2022-11-23 04:02:09,434 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 04:02:09,435 INFO L158 Benchmark]: Toolchain (without parser) took 228136.12ms. Allocated memory was 144.7MB in the beginning and 408.9MB in the end (delta: 264.2MB). Free memory was 96.9MB in the beginning and 286.5MB in the end (delta: -189.6MB). Peak memory consumption was 76.7MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,435 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 119.5MB. Free memory was 86.5MB in the beginning and 86.5MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 04:02:09,436 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1256.04ms. Allocated memory is still 144.7MB. Free memory was 96.9MB in the beginning and 98.2MB in the end (delta: -1.4MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,436 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.04ms. Allocated memory is still 144.7MB. Free memory was 98.2MB in the beginning and 95.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,436 INFO L158 Benchmark]: Boogie Preprocessor took 42.49ms. Allocated memory is still 144.7MB. Free memory was 95.8MB in the beginning and 93.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,437 INFO L158 Benchmark]: RCFGBuilder took 910.57ms. Allocated memory is still 144.7MB. Free memory was 93.7MB in the beginning and 68.9MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,437 INFO L158 Benchmark]: TraceAbstraction took 225782.91ms. Allocated memory was 144.7MB in the beginning and 408.9MB in the end (delta: 264.2MB). Free memory was 68.9MB in the beginning and 291.7MB in the end (delta: -222.8MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,437 INFO L158 Benchmark]: Witness Printer took 71.56ms. Allocated memory is still 408.9MB. Free memory was 291.7MB in the beginning and 286.5MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 04:02:09,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 119.5MB. Free memory was 86.5MB in the beginning and 86.5MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1256.04ms. Allocated memory is still 144.7MB. Free memory was 96.9MB in the beginning and 98.2MB in the end (delta: -1.4MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.04ms. Allocated memory is still 144.7MB. Free memory was 98.2MB in the beginning and 95.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.49ms. Allocated memory is still 144.7MB. Free memory was 95.8MB in the beginning and 93.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 910.57ms. Allocated memory is still 144.7MB. Free memory was 93.7MB in the beginning and 68.9MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 225782.91ms. Allocated memory was 144.7MB in the beginning and 408.9MB in the end (delta: 264.2MB). Free memory was 68.9MB in the beginning and 291.7MB in the end (delta: -222.8MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. * Witness Printer took 71.56ms. Allocated memory is still 408.9MB. Free memory was 291.7MB in the beginning and 286.5MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 206.1s, 186 PlacesBefore, 63 PlacesAfterwards, 186 TransitionsBefore, 60 TransitionsAfterwards, 3136 CoEnabledTransitionPairs, 7 FixpointIterations, 161 TrivialSequentialCompositions, 78 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 3 ConcurrentYvCompositions, 3 ChoiceCompositions, 250 TotalNumberOfCompositions, 10293 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4781, independent: 4380, independent conditional: 0, independent unconditional: 4380, dependent: 401, dependent conditional: 0, dependent unconditional: 401, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2275, independent: 2174, independent conditional: 0, independent unconditional: 2174, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2275, independent: 2104, independent conditional: 0, independent unconditional: 2104, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 171, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 621, independent: 130, independent conditional: 0, independent unconditional: 130, dependent: 492, dependent conditional: 0, dependent unconditional: 492, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4781, independent: 2206, independent conditional: 0, independent unconditional: 2206, dependent: 300, dependent conditional: 0, dependent unconditional: 300, unknown: 2275, unknown conditional: 0, unknown unconditional: 2275] , Statistics on independence cache: Total cache size (in pairs): 347, Positive cache size: 296, Positive conditional cache size: 0, Positive unconditional cache size: 296, Negative cache size: 51, Negative conditional cache size: 0, Negative unconditional cache size: 51, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1243] 0 pthread_mutex_t mutex[10]; [L1244] 0 struct s *slot[10]; [L1254] 0 int i = 0; VAL [i=0, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=1, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=2, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=3, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=4, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=5, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=6, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=7, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=8, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=9, mutex={1:0}, slot={2:0}] [L1254] COND TRUE 0 i < 10 [L1254] 0 i++ VAL [i=10, mutex={1:0}, slot={2:0}] [L1254] COND FALSE 0 !(i < 10) [L1256] 0 int j = __VERIFIER_nondet_int(); [L1257] CALL 0 assume_abort_if_not(0 <= j && j < 10) [L11] COND FALSE 0 !(!cond) [L1257] RET 0 assume_abort_if_not(0 <= j && j < 10) [L1258] 0 struct s *p; [L1259] 0 pthread_t t1; [L1260] CALL, EXPR 0 new(1) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1260] RET, EXPR 0 new(1) [L1260] 0 slot[j] = new(1) [L1261] CALL, EXPR 0 new(2) [L1233] 0 struct s *p = malloc(sizeof(struct s)); [L1234] 0 p->datum = x [L1235] 0 p->next = ((void *)0) [L1236] 0 return p; [L1261] RET, EXPR 0 new(2) [L1261] EXPR 0 slot[j] [L1261] CALL 0 list_add(new(2), slot[j]) [L1239] EXPR 0 list->next [L1239] 0 struct s *temp = list->next; [L1240] 0 list->next = node [L1241] 0 node->next = temp [L1261] RET 0 list_add(new(2), slot[j]) [L1262] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [i=10, j=3, mutex={1:0}, pthread_create(&t1, ((void *)0), t_fun, ((void *)0))=-1, slot={2:0}, t1={9:0}] [L1246] 1 int i = __VERIFIER_nondet_int(); [L1247] CALL 1 assume_abort_if_not(0 <= i && i < 10) [L11] COND FALSE 1 !(!cond) [L1247] RET 1 assume_abort_if_not(0 <= i && i < 10) [L1249] CALL, EXPR 1 new(3) [L1233] 1 struct s *p = malloc(sizeof(struct s)); VAL [\result={6:0}, malloc(sizeof(struct s))={-2:0}, mutex={1:0}, p={-2:0}, p={6:0}, slot={2:0}, unknown-#in~x-unknown=2, unknown-#in~x-unknown=3, x=3, x=2] [L1234] 1 p->datum = x VAL [\result={6:0}, mutex={1:0}, p={6:0}, p={-2:0}, slot={2:0}, unknown-#in~x-unknown=3, unknown-#in~x-unknown=2, x=2, x=3] [L1235] 1 p->next = ((void *)0) [L1236] 1 return p; [L1249] RET, EXPR 1 new(3) [L1249] EXPR 1 slot[i] [L1249] CALL 1 list_add(new(3), slot[i]) [L1239] 1 list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1253]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1262]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 241 locations, 52 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 225.5s, OverallIterations: 14, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 206.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2421 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1393 mSDsluCounter, 219 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 146 mSDsCounter, 182 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3319 IncrementalHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 182 mSolverCounterUnsat, 73 mSDtfsCounter, 3319 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=360occurred in iteration=13, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 174 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 1425 SizeOfPredicates, 0 NumberOfNonLiveVariables, 338 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 450/493 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 04:02:09,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21cf0f34-2f04-46d9-bc79-61d95ca122b7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)