./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 2329fc70 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_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/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_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8 --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 c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 --- 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-2329fc7 [2022-12-13 17:07:25,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:07:25,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:07:25,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:07:25,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:07:25,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:07:25,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:07:25,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:07:25,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:07:25,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:07:25,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:07:25,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:07:25,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:07:25,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:07:25,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:07:25,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:07:25,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:07:25,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:07:25,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:07:25,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:07:25,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:07:25,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:07:25,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:07:25,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:07:25,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:07:25,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:07:25,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:07:25,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:07:25,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:07:25,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:07:25,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:07:25,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:07:25,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:07:25,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:07:25,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:07:25,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:07:25,919 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:07:25,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:07:25,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:07:25,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:07:25,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:07:25,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:07:25,940 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:07:25,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:07:25,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:07:25,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:07:25,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:07:25,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:07:25,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:07:25,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:07:25,941 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:07:25,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:07:25,942 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:07:25,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:07:25,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:07:25,943 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:07:25,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:07:25,944 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:07:25,944 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_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c4f9d381010c40c0aeec814019363f065d1b11569cf33ee927950bcd4ef29f20 [2022-12-13 17:07:26,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:07:26,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:07:26,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:07:26,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:07:26,141 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:07:26,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2022-12-13 17:07:28,680 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:07:28,898 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:07:28,899 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/sv-benchmarks/c/goblint-regression/09-regions_11-arraylist_nr.i [2022-12-13 17:07:28,913 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/data/3ba714f52/7ab2622bedc5444bb1874b88319dfc2b/FLAG4126f5968 [2022-12-13 17:07:29,250 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/data/3ba714f52/7ab2622bedc5444bb1874b88319dfc2b [2022-12-13 17:07:29,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:07:29,254 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:07:29,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:07:29,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:07:29,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:07:29,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5764b10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29, skipping insertion in model container [2022-12-13 17:07:29,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:07:29,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:07:29,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:07:29,670 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:07:29,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:07:29,753 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:07:29,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29 WrapperNode [2022-12-13 17:07:29,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:07:29,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:07:29,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:07:29,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:07:29,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,792 INFO L138 Inliner]: procedures = 370, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 124 [2022-12-13 17:07:29,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:07:29,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:07:29,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:07:29,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:07:29,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:07:29,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:07:29,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:07:29,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:07:29,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (1/1) ... [2022-12-13 17:07:29,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:07:29,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:07:29,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:07:29,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:07:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:07:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 17:07:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:07:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 17:07:29,881 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 17:07:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:07:29,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:07:29,882 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:07:30,000 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:07:30,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:07:30,326 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:07:30,335 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:07:30,335 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 17:07:30,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:07:30 BoogieIcfgContainer [2022-12-13 17:07:30,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:07:30,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:07:30,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:07:30,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:07:30,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:07:29" (1/3) ... [2022-12-13 17:07:30,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8b7268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:07:30, skipping insertion in model container [2022-12-13 17:07:30,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:07:29" (2/3) ... [2022-12-13 17:07:30,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8b7268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:07:30, skipping insertion in model container [2022-12-13 17:07:30,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:07:30" (3/3) ... [2022-12-13 17:07:30,361 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_11-arraylist_nr.i [2022-12-13 17:07:30,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:07:30,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2022-12-13 17:07:30,376 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:07:30,452 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:07:30,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 194 transitions, 393 flow [2022-12-13 17:07:30,569 INFO L130 PetriNetUnfolder]: 6/193 cut-off events. [2022-12-13 17:07:30,570 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:07:30,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 193 events. 6/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 419 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 108. Up to 2 conditions per place. [2022-12-13 17:07:30,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 194 transitions, 393 flow [2022-12-13 17:07:30,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 193 transitions, 389 flow [2022-12-13 17:07:30,586 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:07:30,598 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 193 transitions, 389 flow [2022-12-13 17:07:30,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 193 transitions, 389 flow [2022-12-13 17:07:30,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 193 transitions, 389 flow [2022-12-13 17:07:30,643 INFO L130 PetriNetUnfolder]: 6/193 cut-off events. [2022-12-13 17:07:30,643 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:07:30,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 193 events. 6/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 419 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 108. Up to 2 conditions per place. [2022-12-13 17:07:30,646 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2022-12-13 17:07:52,652 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 214 DAG size of output: 204 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 17:08:01,984 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 211 DAG size of output: 201 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 17:08:03,637 INFO L134 LiptonReduction]: Checked pairs total: 11173 [2022-12-13 17:08:03,637 INFO L136 LiptonReduction]: Total number of compositions: 239 [2022-12-13 17:08:03,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:08:03,654 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;@de29d72, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:08:03,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-12-13 17:08:03,658 INFO L130 PetriNetUnfolder]: 2/4 cut-off events. [2022-12-13 17:08:03,658 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:08:03,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:03,658 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:08:03,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 711887, now seen corresponding path program 1 times [2022-12-13 17:08:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:03,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813831286] [2022-12-13 17:08:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:08:03,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:03,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813831286] [2022-12-13 17:08:03,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813831286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:08:03,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:08:03,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:08:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542739850] [2022-12-13 17:08:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:08:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:08:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:08:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:08:03,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 433 [2022-12-13 17:08:03,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:03,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:03,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 433 [2022-12-13 17:08:03,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:04,064 INFO L130 PetriNetUnfolder]: 138/356 cut-off events. [2022-12-13 17:08:04,064 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:08:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 356 events. 138/356 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1744 event pairs, 136 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 642. Up to 308 conditions per place. [2022-12-13 17:08:04,067 INFO L137 encePairwiseOnDemand]: 412/433 looper letters, 34 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 17:08:04,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 165 flow [2022-12-13 17:08:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:08:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:08:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2022-12-13 17:08:04,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4695919938414165 [2022-12-13 17:08:04,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2022-12-13 17:08:04,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2022-12-13 17:08:04,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:04,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2022-12-13 17:08:04,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,091 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 127 flow. Second operand 3 states and 610 transitions. [2022-12-13 17:08:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 165 flow [2022-12-13 17:08:04,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:08:04,095 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 102 flow [2022-12-13 17:08:04,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-12-13 17:08:04,099 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -16 predicate places. [2022-12-13 17:08:04,099 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 102 flow [2022-12-13 17:08:04,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:04,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:08:04,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:08:04,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash 22024042, now seen corresponding path program 1 times [2022-12-13 17:08:04,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:04,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466491351] [2022-12-13 17:08:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:08:04,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466491351] [2022-12-13 17:08:04,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466491351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:08:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002363692] [2022-12-13 17:08:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:08:04,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:08:04,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:08:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:08:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:08:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:08:04,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:08:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:08:04,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002363692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:08:04,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:08:04,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 17:08:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724301772] [2022-12-13 17:08:04,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:08:04,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:08:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:08:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:08:04,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2022-12-13 17:08:04,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:04,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2022-12-13 17:08:04,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:04,528 INFO L130 PetriNetUnfolder]: 138/359 cut-off events. [2022-12-13 17:08:04,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:08:04,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 359 events. 138/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1734 event pairs, 136 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 673. Up to 308 conditions per place. [2022-12-13 17:08:04,529 INFO L137 encePairwiseOnDemand]: 430/433 looper letters, 34 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2022-12-13 17:08:04,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 192 flow [2022-12-13 17:08:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:08:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:08:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1146 transitions. [2022-12-13 17:08:04,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44110854503464203 [2022-12-13 17:08:04,534 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1146 transitions. [2022-12-13 17:08:04,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1146 transitions. [2022-12-13 17:08:04,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:04,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1146 transitions. [2022-12-13 17:08:04,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 191.0) internal successors, (1146), 6 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,543 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 433.0) internal successors, (3031), 7 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,543 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 102 flow. Second operand 6 states and 1146 transitions. [2022-12-13 17:08:04,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 192 flow [2022-12-13 17:08:04,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 188 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 17:08:04,545 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 134 flow [2022-12-13 17:08:04,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-12-13 17:08:04,546 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -9 predicate places. [2022-12-13 17:08:04,546 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 134 flow [2022-12-13 17:08:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:04,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:04,547 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 17:08:04,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:08:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:04,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1057690295, now seen corresponding path program 2 times [2022-12-13 17:08:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:04,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881824959] [2022-12-13 17:08:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:08:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881824959] [2022-12-13 17:08:04,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881824959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:08:04,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958886565] [2022-12-13 17:08:04,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:08:04,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:04,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:08:04,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:08:04,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:08:04,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:08:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:08:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:08:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:08:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:08:05,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:08:05,070 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 17:08:05,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 17:08:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:08:05,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:08:05,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958886565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:08:05,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:08:05,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 17:08:05,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699178380] [2022-12-13 17:08:05,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:08:05,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:08:05,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:08:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:08:05,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 433 [2022-12-13 17:08:05,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:05,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:05,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 433 [2022-12-13 17:08:05,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:05,523 INFO L130 PetriNetUnfolder]: 131/349 cut-off events. [2022-12-13 17:08:05,523 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:08:05,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 349 events. 131/349 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1639 event pairs, 97 based on Foata normal form. 17/241 useless extension candidates. Maximal degree in co-relation 640. Up to 227 conditions per place. [2022-12-13 17:08:05,524 INFO L137 encePairwiseOnDemand]: 422/433 looper letters, 51 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2022-12-13 17:08:05,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 274 flow [2022-12-13 17:08:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:08:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:08:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 771 transitions. [2022-12-13 17:08:05,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44515011547344113 [2022-12-13 17:08:05,526 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 771 transitions. [2022-12-13 17:08:05,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 771 transitions. [2022-12-13 17:08:05,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:05,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 771 transitions. [2022-12-13 17:08:05,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:05,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:05,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 433.0) internal successors, (2165), 5 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:05,530 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 134 flow. Second operand 4 states and 771 transitions. [2022-12-13 17:08:05,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 274 flow [2022-12-13 17:08:05,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 260 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:08:05,532 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 144 flow [2022-12-13 17:08:05,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2022-12-13 17:08:05,532 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2022-12-13 17:08:05,532 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 144 flow [2022-12-13 17:08:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:05,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:05,533 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 17:08:05,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:08:05,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:05,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:05,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1571340958, now seen corresponding path program 1 times [2022-12-13 17:08:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:05,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088545765] [2022-12-13 17:08:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:08:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:05,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088545765] [2022-12-13 17:08:05,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088545765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:08:05,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417592395] [2022-12-13 17:08:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:05,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:05,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:08:05,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:08:05,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:08:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:08:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:08:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:08:05,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:08:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:08:06,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417592395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:08:06,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:08:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 17:08:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785410635] [2022-12-13 17:08:06,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:08:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:08:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:08:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:08:06,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2022-12-13 17:08:06,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 185.23076923076923) internal successors, (2408), 13 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:06,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:06,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2022-12-13 17:08:06,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:06,221 INFO L130 PetriNetUnfolder]: 131/347 cut-off events. [2022-12-13 17:08:06,221 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-12-13 17:08:06,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 347 events. 131/347 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1602 event pairs, 129 based on Foata normal form. 6/232 useless extension candidates. Maximal degree in co-relation 677. Up to 294 conditions per place. [2022-12-13 17:08:06,222 INFO L137 encePairwiseOnDemand]: 430/433 looper letters, 34 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2022-12-13 17:08:06,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 53 transitions, 270 flow [2022-12-13 17:08:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:08:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:08:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2258 transitions. [2022-12-13 17:08:06,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43456505003849116 [2022-12-13 17:08:06,226 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2258 transitions. [2022-12-13 17:08:06,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2258 transitions. [2022-12-13 17:08:06,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:06,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2258 transitions. [2022-12-13 17:08:06,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:06,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 433.0) internal successors, (5629), 13 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:06,235 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 433.0) internal successors, (5629), 13 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:06,235 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 144 flow. Second operand 12 states and 2258 transitions. [2022-12-13 17:08:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 53 transitions, 270 flow [2022-12-13 17:08:06,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 262 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 17:08:06,237 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 220 flow [2022-12-13 17:08:06,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=220, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2022-12-13 17:08:06,237 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2022-12-13 17:08:06,237 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 220 flow [2022-12-13 17:08:06,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.23076923076923) internal successors, (2408), 13 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:06,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:06,238 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 17:08:06,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:08:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:06,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash -493080002, now seen corresponding path program 2 times [2022-12-13 17:08:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:06,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571050286] [2022-12-13 17:08:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:08:07,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571050286] [2022-12-13 17:08:07,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571050286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:08:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715106774] [2022-12-13 17:08:07,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:08:07,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:08:07,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:08:07,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:08:07,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:08:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:08:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 17:08:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:08:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:08:07,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:08:07,666 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 17:08:07,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 17:08:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:08:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:08:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:08:07,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 17:08:07,741 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-13 17:08:07,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-12-13 17:08:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:08:07,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:08:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:08:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715106774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:08:19,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:08:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-13 17:08:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362682020] [2022-12-13 17:08:19,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:08:19,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:08:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:08:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:08:20,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:25,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:27,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:29,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:31,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:34,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:39,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:41,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:43,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:44,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:45,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:48,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:50,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:52,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:53,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 433 [2022-12-13 17:08:53,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 220 flow. Second operand has 11 states, 11 states have (on average 161.36363636363637) internal successors, (1775), 11 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:53,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:53,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 433 [2022-12-13 17:08:53,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:55,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:08:57,015 INFO L130 PetriNetUnfolder]: 279/682 cut-off events. [2022-12-13 17:08:57,015 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-12-13 17:08:57,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 682 events. 279/682 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3651 event pairs, 225 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 1334. Up to 266 conditions per place. [2022-12-13 17:08:57,018 INFO L137 encePairwiseOnDemand]: 425/433 looper letters, 85 selfloop transitions, 11 changer transitions 0/103 dead transitions. [2022-12-13 17:08:57,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 533 flow [2022-12-13 17:08:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:08:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:08:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1212 transitions. [2022-12-13 17:08:57,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3998680303530188 [2022-12-13 17:08:57,021 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1212 transitions. [2022-12-13 17:08:57,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1212 transitions. [2022-12-13 17:08:57,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:57,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1212 transitions. [2022-12-13 17:08:57,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.14285714285714) internal successors, (1212), 7 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:57,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 433.0) internal successors, (3464), 8 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:57,025 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 433.0) internal successors, (3464), 8 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:57,026 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 220 flow. Second operand 7 states and 1212 transitions. [2022-12-13 17:08:57,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 533 flow [2022-12-13 17:08:57,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 485 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 17:08:57,028 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 254 flow [2022-12-13 17:08:57,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=254, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 17:08:57,029 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2022-12-13 17:08:57,029 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 254 flow [2022-12-13 17:08:57,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 161.36363636363637) internal successors, (1775), 11 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:57,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:57,030 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1] [2022-12-13 17:08:57,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:08:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:57,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1894390799, now seen corresponding path program 1 times [2022-12-13 17:08:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:57,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680438209] [2022-12-13 17:08:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:08:57,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:57,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680438209] [2022-12-13 17:08:57,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680438209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:08:57,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835622174] [2022-12-13 17:08:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:57,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:08:57,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:08:57,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:08:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:08:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:08:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:08:57,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:08:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:08:57,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835622174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:08:57,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:08:57,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 17:08:57,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960858098] [2022-12-13 17:08:57,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:08:57,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:08:57,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:08:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:08:57,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2022-12-13 17:08:57,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 254 flow. Second operand has 9 states, 9 states have (on average 185.33333333333334) internal successors, (1668), 9 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:57,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:57,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2022-12-13 17:08:57,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:58,093 INFO L130 PetriNetUnfolder]: 132/354 cut-off events. [2022-12-13 17:08:58,093 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-12-13 17:08:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 354 events. 132/354 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1596 event pairs, 129 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 728. Up to 302 conditions per place. [2022-12-13 17:08:58,096 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2022-12-13 17:08:58,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 60 transitions, 360 flow [2022-12-13 17:08:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:08:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 17:08:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1526 transitions. [2022-12-13 17:08:58,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4405311778290993 [2022-12-13 17:08:58,099 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1526 transitions. [2022-12-13 17:08:58,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1526 transitions. [2022-12-13 17:08:58,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:58,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1526 transitions. [2022-12-13 17:08:58,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 190.75) internal successors, (1526), 8 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:58,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 433.0) internal successors, (3897), 9 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:58,104 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 433.0) internal successors, (3897), 9 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:58,104 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 254 flow. Second operand 8 states and 1526 transitions. [2022-12-13 17:08:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 60 transitions, 360 flow [2022-12-13 17:08:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 60 transitions, 344 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-12-13 17:08:58,106 INFO L231 Difference]: Finished difference. Result has 85 places, 59 transitions, 278 flow [2022-12-13 17:08:58,106 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=278, PETRI_PLACES=85, PETRI_TRANSITIONS=59} [2022-12-13 17:08:58,106 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 21 predicate places. [2022-12-13 17:08:58,106 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 59 transitions, 278 flow [2022-12-13 17:08:58,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 185.33333333333334) internal successors, (1668), 9 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:08:58,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:58,107 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 1, 1, 1] [2022-12-13 17:08:58,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:08:58,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:08:58,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:08:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash -556464407, now seen corresponding path program 3 times [2022-12-13 17:08:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:58,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217546059] [2022-12-13 17:08:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:58,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:09:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:00,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:09:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217546059] [2022-12-13 17:09:00,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217546059] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:09:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494571935] [2022-12-13 17:09:00,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:09:00,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:09:00,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:09:00,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:09:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:09:01,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:09:01,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:09:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 17:09:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:09:01,473 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 17:09:01,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 17:09:01,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:09:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 17:09:01,536 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-13 17:09:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-12-13 17:09:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 17:09:01,631 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-13 17:09:01,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 65 [2022-12-13 17:09:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 17:09:01,762 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-13 17:09:01,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 53 treesize of output 81 [2022-12-13 17:09:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:09:01,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-13 17:09:01,952 INFO L321 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2022-12-13 17:09:01,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 97 [2022-12-13 17:09:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:02,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:09:08,065 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:09:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:10,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494571935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:09:10,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:09:10,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 17:09:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7373604] [2022-12-13 17:09:10,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:09:10,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:09:10,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:09:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:09:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:09:24,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:09:32,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 433 [2022-12-13 17:09:32,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 59 transitions, 278 flow. Second operand has 20 states, 20 states have (on average 164.2) internal successors, (3284), 20 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:32,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:09:32,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 433 [2022-12-13 17:09:32,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:09:38,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:09:41,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:09:45,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:09:48,971 INFO L130 PetriNetUnfolder]: 302/712 cut-off events. [2022-12-13 17:09:48,971 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-12-13 17:09:48,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 712 events. 302/712 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3592 event pairs, 226 based on Foata normal form. 6/501 useless extension candidates. Maximal degree in co-relation 1528. Up to 265 conditions per place. [2022-12-13 17:09:48,974 INFO L137 encePairwiseOnDemand]: 425/433 looper letters, 82 selfloop transitions, 27 changer transitions 0/115 dead transitions. [2022-12-13 17:09:48,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 115 transitions, 770 flow [2022-12-13 17:09:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:09:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:09:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2387 transitions. [2022-12-13 17:09:48,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39376443418013857 [2022-12-13 17:09:48,978 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2387 transitions. [2022-12-13 17:09:48,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2387 transitions. [2022-12-13 17:09:48,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:09:48,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2387 transitions. [2022-12-13 17:09:48,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.5) internal successors, (2387), 14 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:48,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 433.0) internal successors, (6495), 15 states have internal predecessors, (6495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:48,987 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 433.0) internal successors, (6495), 15 states have internal predecessors, (6495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:48,987 INFO L175 Difference]: Start difference. First operand has 85 places, 59 transitions, 278 flow. Second operand 14 states and 2387 transitions. [2022-12-13 17:09:48,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 115 transitions, 770 flow [2022-12-13 17:09:48,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 745 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-12-13 17:09:48,990 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 507 flow [2022-12-13 17:09:48,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=507, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2022-12-13 17:09:48,990 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 28 predicate places. [2022-12-13 17:09:48,990 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 507 flow [2022-12-13 17:09:48,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 164.2) internal successors, (3284), 20 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:48,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:09:48,991 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 6, 1, 1, 1] [2022-12-13 17:09:49,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:09:49,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:09:49,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:09:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:09:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2108672335, now seen corresponding path program 2 times [2022-12-13 17:09:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:09:49,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331936807] [2022-12-13 17:09:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:09:49,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:09:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:09:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:09:49,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331936807] [2022-12-13 17:09:49,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331936807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:09:49,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600696421] [2022-12-13 17:09:49,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:09:49,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:09:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:09:49,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:09:49,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:09:49,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:09:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:09:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:09:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:09:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:49,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:09:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:49,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600696421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:09:49,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:09:49,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-12-13 17:09:49,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113837835] [2022-12-13 17:09:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:09:49,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:09:49,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:09:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:09:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:09:49,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2022-12-13 17:09:49,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:49,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:09:49,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2022-12-13 17:09:49,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:09:50,379 INFO L130 PetriNetUnfolder]: 131/356 cut-off events. [2022-12-13 17:09:50,379 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2022-12-13 17:09:50,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 356 events. 131/356 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1610 event pairs, 129 based on Foata normal form. 4/241 useless extension candidates. Maximal degree in co-relation 755. Up to 302 conditions per place. [2022-12-13 17:09:50,380 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 42 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2022-12-13 17:09:50,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 62 transitions, 417 flow [2022-12-13 17:09:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:09:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:09:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2264 transitions. [2022-12-13 17:09:50,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4357197844495766 [2022-12-13 17:09:50,384 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2264 transitions. [2022-12-13 17:09:50,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2264 transitions. [2022-12-13 17:09:50,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:09:50,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2264 transitions. [2022-12-13 17:09:50,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.66666666666666) internal successors, (2264), 12 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:50,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 433.0) internal successors, (5629), 13 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:50,392 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 433.0) internal successors, (5629), 13 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:50,392 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 507 flow. Second operand 12 states and 2264 transitions. [2022-12-13 17:09:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 62 transitions, 417 flow [2022-12-13 17:09:50,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 62 transitions, 300 flow, removed 41 selfloop flow, removed 15 redundant places. [2022-12-13 17:09:50,396 INFO L231 Difference]: Finished difference. Result has 88 places, 62 transitions, 216 flow [2022-12-13 17:09:50,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=88, PETRI_TRANSITIONS=62} [2022-12-13 17:09:50,396 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 24 predicate places. [2022-12-13 17:09:50,396 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 62 transitions, 216 flow [2022-12-13 17:09:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:50,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:09:50,398 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1] [2022-12-13 17:09:50,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:09:50,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:09:50,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:09:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:09:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 693950153, now seen corresponding path program 4 times [2022-12-13 17:09:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:09:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200279441] [2022-12-13 17:09:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:09:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:09:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:09:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:51,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:09:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200279441] [2022-12-13 17:09:51,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200279441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:09:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143309340] [2022-12-13 17:09:51,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:09:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:09:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:09:51,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:09:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:09:51,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:09:51,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:09:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:09:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:09:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:09:51,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:09:51,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143309340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:09:51,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:09:51,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 13 [2022-12-13 17:09:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816985893] [2022-12-13 17:09:51,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:09:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:09:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:09:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:09:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:09:51,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2022-12-13 17:09:51,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 62 transitions, 216 flow. Second operand has 13 states, 13 states have (on average 185.07692307692307) internal successors, (2406), 13 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:51,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:09:51,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2022-12-13 17:09:51,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:09:52,686 INFO L130 PetriNetUnfolder]: 130/354 cut-off events. [2022-12-13 17:09:52,686 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-12-13 17:09:52,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 354 events. 130/354 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1606 event pairs, 129 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 687. Up to 288 conditions per place. [2022-12-13 17:09:52,688 INFO L137 encePairwiseOnDemand]: 430/433 looper letters, 41 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2022-12-13 17:09:52,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 60 transitions, 310 flow [2022-12-13 17:09:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:09:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 17:09:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2436 transitions. [2022-12-13 17:09:52,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327589269852549 [2022-12-13 17:09:52,691 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2436 transitions. [2022-12-13 17:09:52,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2436 transitions. [2022-12-13 17:09:52,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:09:52,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2436 transitions. [2022-12-13 17:09:52,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.3846153846154) internal successors, (2436), 13 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:52,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 433.0) internal successors, (6062), 14 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:52,698 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 433.0) internal successors, (6062), 14 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:52,698 INFO L175 Difference]: Start difference. First operand has 88 places, 62 transitions, 216 flow. Second operand 13 states and 2436 transitions. [2022-12-13 17:09:52,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 60 transitions, 310 flow [2022-12-13 17:09:52,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 60 transitions, 288 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-12-13 17:09:52,699 INFO L231 Difference]: Finished difference. Result has 87 places, 60 transitions, 206 flow [2022-12-13 17:09:52,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=206, PETRI_PLACES=87, PETRI_TRANSITIONS=60} [2022-12-13 17:09:52,700 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, 23 predicate places. [2022-12-13 17:09:52,700 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 60 transitions, 206 flow [2022-12-13 17:09:52,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.07692307692307) internal successors, (2406), 13 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:09:52,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:09:52,700 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1] [2022-12-13 17:09:52,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:09:52,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:09:52,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-12-13 17:09:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:09:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash 693950095, now seen corresponding path program 3 times [2022-12-13 17:09:52,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:09:52,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65974764] [2022-12-13 17:09:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:09:52,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:09:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:09:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 17:09:56,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:09:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65974764] [2022-12-13 17:09:56,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65974764] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:09:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499442655] [2022-12-13 17:09:56,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:09:56,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:09:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:09:56,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:09:56,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e74b287-d084-40ea-95a2-cd8b2cd9af35/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process