./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:57:37,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:57:37,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:57:37,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:57:37,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:57:37,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:57:37,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:57:37,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:57:37,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:57:37,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:57:37,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:57:37,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:57:37,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:57:37,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:57:37,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:57:37,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:57:37,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:57:37,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:57:37,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:57:37,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:57:37,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:57:37,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:57:37,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:57:37,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:57:37,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:57:37,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:57:37,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:57:37,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:57:37,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:57:37,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:57:37,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:57:37,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:57:37,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:57:37,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:57:37,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:57:37,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:57:37,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:57:37,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:57:37,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:57:37,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:57:37,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:57:37,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 02:57:37,908 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:57:37,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:57:37,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:57:37,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:57:37,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:57:37,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:57:37,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:57:37,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:57:37,911 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:57:37,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:57:37,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:57:37,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:57:37,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:57:37,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:57:37,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:57:37,913 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:57:37,914 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:57:37,914 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:57:37,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:57:37,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:57:37,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:57:37,915 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:57:37,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:57:37,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:57:37,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:57:37,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:57:37,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:57:37,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:57:37,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:57:37,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:57:37,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:57:37,917 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:57:37,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:57:37,918 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_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e [2022-11-23 02:57:38,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:57:38,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:57:38,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:57:38,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:57:38,307 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:57:38,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/clever.wvr.c [2022-11-23 02:57:41,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:57:41,665 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:57:41,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/sv-benchmarks/c/weaver/clever.wvr.c [2022-11-23 02:57:41,671 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/data/7513efada/4ffe3ed02c5b4fbb96010f98308a2a4e/FLAG686c67ddb [2022-11-23 02:57:41,693 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/data/7513efada/4ffe3ed02c5b4fbb96010f98308a2a4e [2022-11-23 02:57:41,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:57:41,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:57:41,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:57:41,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:57:41,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:57:41,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:41,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a43758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41, skipping insertion in model container [2022-11-23 02:57:41,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:41,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:57:41,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:57:41,944 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/sv-benchmarks/c/weaver/clever.wvr.c[2133,2146] [2022-11-23 02:57:41,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:57:41,960 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:57:41,982 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/sv-benchmarks/c/weaver/clever.wvr.c[2133,2146] [2022-11-23 02:57:41,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:57:41,998 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:57:41,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41 WrapperNode [2022-11-23 02:57:41,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:57:42,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:57:42,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:57:42,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:57:42,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,037 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2022-11-23 02:57:42,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:57:42,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:57:42,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:57:42,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:57:42,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:57:42,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:57:42,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:57:42,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:57:42,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (1/1) ... [2022-11-23 02:57:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:57:42,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:42,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:57:42,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:57:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:57:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:57:42,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:57:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:57:42,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:57:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:57:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:57:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:57:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:57:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:57:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:57:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:57:42,153 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:57:42,255 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:57:42,258 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:57:42,541 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:57:42,551 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:57:42,551 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 02:57:42,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:42 BoogieIcfgContainer [2022-11-23 02:57:42,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:57:42,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:57:42,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:57:42,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:57:42,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:57:41" (1/3) ... [2022-11-23 02:57:42,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732272cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:42, skipping insertion in model container [2022-11-23 02:57:42,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:41" (2/3) ... [2022-11-23 02:57:42,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732272cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:42, skipping insertion in model container [2022-11-23 02:57:42,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:42" (3/3) ... [2022-11-23 02:57:42,564 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2022-11-23 02:57:42,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:57:42,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-23 02:57:42,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:57:42,737 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:57:42,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 282 flow [2022-11-23 02:57:42,930 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-11-23 02:57:42,931 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:57:42,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-11-23 02:57:42,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 133 transitions, 282 flow [2022-11-23 02:57:42,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 126 transitions, 264 flow [2022-11-23 02:57:42,953 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:57:42,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 126 transitions, 264 flow [2022-11-23 02:57:42,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 126 transitions, 264 flow [2022-11-23 02:57:42,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 264 flow [2022-11-23 02:57:43,071 INFO L130 PetriNetUnfolder]: 9/126 cut-off events. [2022-11-23 02:57:43,071 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:57:43,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-11-23 02:57:43,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 972 [2022-11-23 02:57:48,667 INFO L134 LiptonReduction]: Checked pairs total: 946 [2022-11-23 02:57:48,667 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-23 02:57:48,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:57:48,691 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;@7a46ee6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:57:48,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-23 02:57:48,693 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 02:57:48,694 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:57:48,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:48,695 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 02:57:48,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:48,701 INFO L85 PathProgramCache]: Analyzing trace with hash 493, now seen corresponding path program 1 times [2022-11-23 02:57:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:48,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489880646] [2022-11-23 02:57:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:48,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489880646] [2022-11-23 02:57:48,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489880646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:48,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:48,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 02:57:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293128956] [2022-11-23 02:57:48,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:48,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 02:57:48,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 02:57:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:57:48,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 262 [2022-11-23 02:57:48,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 122.5) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:48,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:48,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 262 [2022-11-23 02:57:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:48,955 INFO L130 PetriNetUnfolder]: 75/122 cut-off events. [2022-11-23 02:57:48,955 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 02:57:48,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 122 events. 75/122 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 266 event pairs, 35 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 210. Up to 123 conditions per place. [2022-11-23 02:57:48,959 INFO L137 encePairwiseOnDemand]: 259/262 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-11-23 02:57:48,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 96 flow [2022-11-23 02:57:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 02:57:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 02:57:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 268 transitions. [2022-11-23 02:57:48,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5114503816793893 [2022-11-23 02:57:48,989 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 268 transitions. [2022-11-23 02:57:48,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 268 transitions. [2022-11-23 02:57:48,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:48,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 268 transitions. [2022-11-23 02:57:49,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 134.0) internal successors, (268), 2 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,011 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,013 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 60 flow. Second operand 2 states and 268 transitions. [2022-11-23 02:57:49,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 96 flow [2022-11-23 02:57:49,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 02:57:49,019 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2022-11-23 02:57:49,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2022-11-23 02:57:49,028 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2022-11-23 02:57:49,028 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2022-11-23 02:57:49,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 122.5) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:49,029 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:57:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:57:49,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 482550, now seen corresponding path program 1 times [2022-11-23 02:57:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:49,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787502066] [2022-11-23 02:57:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787502066] [2022-11-23 02:57:49,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787502066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:49,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:49,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:57:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121920439] [2022-11-23 02:57:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:49,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:57:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:57:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:57:49,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2022-11-23 02:57:49,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:49,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2022-11-23 02:57:49,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:49,374 INFO L130 PetriNetUnfolder]: 69/111 cut-off events. [2022-11-23 02:57:49,374 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:57:49,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 111 events. 69/111 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 234 event pairs, 32 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 226. Up to 111 conditions per place. [2022-11-23 02:57:49,375 INFO L137 encePairwiseOnDemand]: 259/262 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-23 02:57:49,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 80 flow [2022-11-23 02:57:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:57:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:57:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2022-11-23 02:57:49,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4580152671755725 [2022-11-23 02:57:49,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2022-11-23 02:57:49,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2022-11-23 02:57:49,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:49,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2022-11-23 02:57:49,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,384 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 360 transitions. [2022-11-23 02:57:49,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 80 flow [2022-11-23 02:57:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 02:57:49,386 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 44 flow [2022-11-23 02:57:49,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2022-11-23 02:57:49,387 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2022-11-23 02:57:49,387 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 44 flow [2022-11-23 02:57:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:49,388 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:57:49,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:57:49,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash 482551, now seen corresponding path program 1 times [2022-11-23 02:57:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:49,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510383435] [2022-11-23 02:57:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:49,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510383435] [2022-11-23 02:57:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510383435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:49,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:49,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:57:49,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254180196] [2022-11-23 02:57:49,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:49,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:57:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:57:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:57:49,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 262 [2022-11-23 02:57:49,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:49,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 262 [2022-11-23 02:57:49,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:49,686 INFO L130 PetriNetUnfolder]: 63/100 cut-off events. [2022-11-23 02:57:49,686 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:57:49,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 100 events. 63/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 199 event pairs, 29 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 205. Up to 100 conditions per place. [2022-11-23 02:57:49,688 INFO L137 encePairwiseOnDemand]: 259/262 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-23 02:57:49,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2022-11-23 02:57:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:57:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:57:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2022-11-23 02:57:49,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4707379134860051 [2022-11-23 02:57:49,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2022-11-23 02:57:49,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2022-11-23 02:57:49,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:49,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2022-11-23 02:57:49,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,698 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 44 flow. Second operand 3 states and 370 transitions. [2022-11-23 02:57:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2022-11-23 02:57:49,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:57:49,699 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 41 flow [2022-11-23 02:57:49,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2022-11-23 02:57:49,700 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2022-11-23 02:57:49,700 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 41 flow [2022-11-23 02:57:49,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:49,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:57:49,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 02:57:49,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash 463740192, now seen corresponding path program 1 times [2022-11-23 02:57:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951818181] [2022-11-23 02:57:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:49,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:49,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951818181] [2022-11-23 02:57:49,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951818181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:49,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:49,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:57:49,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360321104] [2022-11-23 02:57:49,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:49,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:57:49,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:49,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:57:49,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:57:49,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 262 [2022-11-23 02:57:49,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:49,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:49,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 262 [2022-11-23 02:57:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:50,000 INFO L130 PetriNetUnfolder]: 49/80 cut-off events. [2022-11-23 02:57:50,001 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:57:50,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 80 events. 49/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 140 event pairs, 22 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 166. Up to 80 conditions per place. [2022-11-23 02:57:50,002 INFO L137 encePairwiseOnDemand]: 260/262 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-11-23 02:57:50,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 16 transitions, 71 flow [2022-11-23 02:57:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:57:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:57:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-11-23 02:57:50,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43765903307888043 [2022-11-23 02:57:50,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-11-23 02:57:50,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-11-23 02:57:50,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:50,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-11-23 02:57:50,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,009 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 41 flow. Second operand 3 states and 344 transitions. [2022-11-23 02:57:50,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 16 transitions, 71 flow [2022-11-23 02:57:50,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:57:50,010 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 40 flow [2022-11-23 02:57:50,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2022-11-23 02:57:50,011 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2022-11-23 02:57:50,011 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 40 flow [2022-11-23 02:57:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:50,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:57:50,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 02:57:50,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash 463740193, now seen corresponding path program 1 times [2022-11-23 02:57:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:50,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688665988] [2022-11-23 02:57:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:50,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:50,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688665988] [2022-11-23 02:57:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688665988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:50,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:50,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:57:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053614726] [2022-11-23 02:57:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:57:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:57:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:57:50,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 262 [2022-11-23 02:57:50,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:50,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 262 [2022-11-23 02:57:50,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:50,234 INFO L130 PetriNetUnfolder]: 35/60 cut-off events. [2022-11-23 02:57:50,234 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:57:50,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 60 events. 35/60 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 15 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 127. Up to 60 conditions per place. [2022-11-23 02:57:50,235 INFO L137 encePairwiseOnDemand]: 260/262 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-11-23 02:57:50,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 68 flow [2022-11-23 02:57:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:57:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:57:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2022-11-23 02:57:50,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4592875318066158 [2022-11-23 02:57:50,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2022-11-23 02:57:50,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2022-11-23 02:57:50,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:50,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2022-11-23 02:57:50,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,242 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 40 flow. Second operand 3 states and 361 transitions. [2022-11-23 02:57:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 68 flow [2022-11-23 02:57:50,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:57:50,243 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 39 flow [2022-11-23 02:57:50,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2022-11-23 02:57:50,244 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -7 predicate places. [2022-11-23 02:57:50,244 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 39 flow [2022-11-23 02:57:50,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:50,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 02:57:50,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash -287907428, now seen corresponding path program 1 times [2022-11-23 02:57:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:50,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151664436] [2022-11-23 02:57:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:50,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:50,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151664436] [2022-11-23 02:57:50,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151664436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:50,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:50,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:57:50,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411722261] [2022-11-23 02:57:50,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:57:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:57:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:57:50,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 262 [2022-11-23 02:57:50,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:50,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 262 [2022-11-23 02:57:50,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:50,550 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2022-11-23 02:57:50,550 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:57:50,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 117 events. 69/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 278 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 245. Up to 73 conditions per place. [2022-11-23 02:57:50,552 INFO L137 encePairwiseOnDemand]: 258/262 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2022-11-23 02:57:50,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 120 flow [2022-11-23 02:57:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:57:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:57:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2022-11-23 02:57:50,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47837150127226463 [2022-11-23 02:57:50,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2022-11-23 02:57:50,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2022-11-23 02:57:50,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:50,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2022-11-23 02:57:50,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,560 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 39 flow. Second operand 3 states and 376 transitions. [2022-11-23 02:57:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 120 flow [2022-11-23 02:57:50,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:57:50,563 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2022-11-23 02:57:50,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2022-11-23 02:57:50,566 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2022-11-23 02:57:50,566 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2022-11-23 02:57:50,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:50,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:50,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 02:57:50,568 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1437925577, now seen corresponding path program 1 times [2022-11-23 02:57:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026928022] [2022-11-23 02:57:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:50,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026928022] [2022-11-23 02:57:50,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026928022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:50,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:50,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:57:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575384012] [2022-11-23 02:57:50,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:57:50,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:57:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:57:50,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 262 [2022-11-23 02:57:50,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:50,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 262 [2022-11-23 02:57:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:50,838 INFO L130 PetriNetUnfolder]: 121/217 cut-off events. [2022-11-23 02:57:50,838 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-23 02:57:50,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 217 events. 121/217 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 684 event pairs, 18 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 528. Up to 130 conditions per place. [2022-11-23 02:57:50,843 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 35 selfloop transitions, 6 changer transitions 8/49 dead transitions. [2022-11-23 02:57:50,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 49 transitions, 247 flow [2022-11-23 02:57:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:57:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:57:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-23 02:57:50,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4618320610687023 [2022-11-23 02:57:50,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-23 02:57:50,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-23 02:57:50,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:50,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-23 02:57:50,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,853 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,853 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 5 states and 605 transitions. [2022-11-23 02:57:50,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 49 transitions, 247 flow [2022-11-23 02:57:50,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 49 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:57:50,856 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 103 flow [2022-11-23 02:57:50,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-11-23 02:57:50,857 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2022-11-23 02:57:50,857 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 103 flow [2022-11-23 02:57:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:50,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:50,858 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:50,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 02:57:50,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2144694909, now seen corresponding path program 2 times [2022-11-23 02:57:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436906300] [2022-11-23 02:57:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:50,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436906300] [2022-11-23 02:57:50,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436906300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:57:50,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:57:50,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:57:50,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061650480] [2022-11-23 02:57:50,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:57:50,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:57:50,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:57:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:57:51,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 262 [2022-11-23 02:57:51,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:51,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 262 [2022-11-23 02:57:51,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:51,115 INFO L130 PetriNetUnfolder]: 110/185 cut-off events. [2022-11-23 02:57:51,116 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2022-11-23 02:57:51,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 185 events. 110/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 528 event pairs, 14 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 583. Up to 128 conditions per place. [2022-11-23 02:57:51,118 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 29 selfloop transitions, 7 changer transitions 5/41 dead transitions. [2022-11-23 02:57:51,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 251 flow [2022-11-23 02:57:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:57:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:57:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 599 transitions. [2022-11-23 02:57:51,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45725190839694657 [2022-11-23 02:57:51,121 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 599 transitions. [2022-11-23 02:57:51,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 599 transitions. [2022-11-23 02:57:51,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:51,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 599 transitions. [2022-11-23 02:57:51,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,127 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 103 flow. Second operand 5 states and 599 transitions. [2022-11-23 02:57:51,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 251 flow [2022-11-23 02:57:51,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:57:51,133 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 131 flow [2022-11-23 02:57:51,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-11-23 02:57:51,137 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2022-11-23 02:57:51,137 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 131 flow [2022-11-23 02:57:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:51,138 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:51,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 02:57:51,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:51,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1892058025, now seen corresponding path program 1 times [2022-11-23 02:57:51,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:51,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597802817] [2022-11-23 02:57:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:51,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:57:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597802817] [2022-11-23 02:57:51,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597802817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124242606] [2022-11-23 02:57:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:51,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:51,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:57:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:57:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:57:51,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:57:51,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124242606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:51,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:57:51,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-11-23 02:57:51,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672938066] [2022-11-23 02:57:51,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:51,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:57:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:57:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:57:51,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 02:57:51,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:51,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 02:57:51,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:51,730 INFO L130 PetriNetUnfolder]: 108/175 cut-off events. [2022-11-23 02:57:51,730 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2022-11-23 02:57:51,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 175 events. 108/175 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 462 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 624. Up to 91 conditions per place. [2022-11-23 02:57:51,733 INFO L137 encePairwiseOnDemand]: 257/262 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2022-11-23 02:57:51,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 268 flow [2022-11-23 02:57:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:57:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:57:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2022-11-23 02:57:51,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44656488549618323 [2022-11-23 02:57:51,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2022-11-23 02:57:51,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2022-11-23 02:57:51,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:51,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2022-11-23 02:57:51,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,751 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 131 flow. Second operand 5 states and 585 transitions. [2022-11-23 02:57:51,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 268 flow [2022-11-23 02:57:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-23 02:57:51,755 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 148 flow [2022-11-23 02:57:51,755 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2022-11-23 02:57:51,755 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2022-11-23 02:57:51,755 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 148 flow [2022-11-23 02:57:51,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:51,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:51,756 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:51,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:57:51,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:51,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -551828799, now seen corresponding path program 1 times [2022-11-23 02:57:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:51,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081938441] [2022-11-23 02:57:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:52,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081938441] [2022-11-23 02:57:52,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081938441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943298527] [2022-11-23 02:57:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:52,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:52,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:52,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:52,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:57:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 02:57:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:54,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:57:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943298527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:57:55,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:57:55,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-23 02:57:55,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906390306] [2022-11-23 02:57:55,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:57:55,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:57:55,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:57:55,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:57:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=101, Unknown=1, NotChecked=0, Total=156 [2022-11-23 02:57:55,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 262 [2022-11-23 02:57:55,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:55,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:57:55,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 262 [2022-11-23 02:57:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:57:56,510 INFO L130 PetriNetUnfolder]: 224/369 cut-off events. [2022-11-23 02:57:56,511 INFO L131 PetriNetUnfolder]: For 444/444 co-relation queries the response was YES. [2022-11-23 02:57:56,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 369 events. 224/369 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1268 event pairs, 20 based on Foata normal form. 10/379 useless extension candidates. Maximal degree in co-relation 1409. Up to 189 conditions per place. [2022-11-23 02:57:56,514 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 48 selfloop transitions, 17 changer transitions 14/79 dead transitions. [2022-11-23 02:57:56,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 79 transitions, 560 flow [2022-11-23 02:57:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:57:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:57:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 947 transitions. [2022-11-23 02:57:56,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40161153519932147 [2022-11-23 02:57:56,519 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 947 transitions. [2022-11-23 02:57:56,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 947 transitions. [2022-11-23 02:57:56,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:57:56,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 947 transitions. [2022-11-23 02:57:56,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:56,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:56,529 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:56,529 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 148 flow. Second operand 9 states and 947 transitions. [2022-11-23 02:57:56,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 79 transitions, 560 flow [2022-11-23 02:57:56,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 79 transitions, 542 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 02:57:56,534 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 282 flow [2022-11-23 02:57:56,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2022-11-23 02:57:56,535 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2022-11-23 02:57:56,535 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 282 flow [2022-11-23 02:57:56,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:57:56,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:57:56,536 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:57:56,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 02:57:56,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:57:56,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:57:56,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:57:56,743 INFO L85 PathProgramCache]: Analyzing trace with hash 431042689, now seen corresponding path program 2 times [2022-11-23 02:57:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:57:56,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624151557] [2022-11-23 02:57:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:57:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:57:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:57:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:57:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624151557] [2022-11-23 02:57:57,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624151557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:57:57,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799937943] [2022-11-23 02:57:57,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:57:57,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:57:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:57:57,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:57:57,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:57:57,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:57:57,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:57:57,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:57:57,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:57:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:57:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:00,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799937943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:00,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:00,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-23 02:58:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236933766] [2022-11-23 02:58:00,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:00,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:58:00,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:58:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=100, Unknown=1, NotChecked=0, Total=156 [2022-11-23 02:58:02,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:04,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:06,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:08,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:10,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:13,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:58:13,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 262 [2022-11-23 02:58:13,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 282 flow. Second operand has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:13,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:13,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 262 [2022-11-23 02:58:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:14,676 INFO L130 PetriNetUnfolder]: 550/901 cut-off events. [2022-11-23 02:58:14,677 INFO L131 PetriNetUnfolder]: For 1777/1777 co-relation queries the response was YES. [2022-11-23 02:58:14,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3862 conditions, 901 events. 550/901 cut-off events. For 1777/1777 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3826 event pairs, 30 based on Foata normal form. 5/906 useless extension candidates. Maximal degree in co-relation 3846. Up to 481 conditions per place. [2022-11-23 02:58:14,688 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 97 selfloop transitions, 51 changer transitions 7/155 dead transitions. [2022-11-23 02:58:14,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 155 transitions, 1274 flow [2022-11-23 02:58:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:58:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 02:58:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1587 transitions. [2022-11-23 02:58:14,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40381679389312974 [2022-11-23 02:58:14,695 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1587 transitions. [2022-11-23 02:58:14,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1587 transitions. [2022-11-23 02:58:14,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:14,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1587 transitions. [2022-11-23 02:58:14,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.8) internal successors, (1587), 15 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:14,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:14,711 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:14,711 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 282 flow. Second operand 15 states and 1587 transitions. [2022-11-23 02:58:14,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 155 transitions, 1274 flow [2022-11-23 02:58:14,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 155 transitions, 1157 flow, removed 55 selfloop flow, removed 4 redundant places. [2022-11-23 02:58:14,722 INFO L231 Difference]: Finished difference. Result has 64 places, 76 transitions, 757 flow [2022-11-23 02:58:14,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=757, PETRI_PLACES=64, PETRI_TRANSITIONS=76} [2022-11-23 02:58:14,723 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2022-11-23 02:58:14,723 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 76 transitions, 757 flow [2022-11-23 02:58:14,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 99.84615384615384) internal successors, (1298), 13 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:14,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:14,724 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:14,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 02:58:14,930 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:58:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash 600378509, now seen corresponding path program 3 times [2022-11-23 02:58:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:14,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419087297] [2022-11-23 02:58:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:15,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419087297] [2022-11-23 02:58:15,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419087297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:15,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844962718] [2022-11-23 02:58:15,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:58:15,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:15,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:15,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:15,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:58:15,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:58:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:58:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:15,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844962718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:16,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:16,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-23 02:58:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298439100] [2022-11-23 02:58:16,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:58:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:58:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:58:16,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 262 [2022-11-23 02:58:16,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 76 transitions, 757 flow. Second operand has 13 states, 13 states have (on average 110.84615384615384) internal successors, (1441), 13 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:16,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:16,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 262 [2022-11-23 02:58:16,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:19,515 INFO L130 PetriNetUnfolder]: 1251/2064 cut-off events. [2022-11-23 02:58:19,516 INFO L131 PetriNetUnfolder]: For 7816/7816 co-relation queries the response was YES. [2022-11-23 02:58:19,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10370 conditions, 2064 events. 1251/2064 cut-off events. For 7816/7816 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10656 event pairs, 126 based on Foata normal form. 8/2072 useless extension candidates. Maximal degree in co-relation 10345. Up to 1113 conditions per place. [2022-11-23 02:58:19,541 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 139 selfloop transitions, 121 changer transitions 8/268 dead transitions. [2022-11-23 02:58:19,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 268 transitions, 2785 flow [2022-11-23 02:58:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 02:58:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 02:58:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2217 transitions. [2022-11-23 02:58:19,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44535958216151067 [2022-11-23 02:58:19,599 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2217 transitions. [2022-11-23 02:58:19,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2217 transitions. [2022-11-23 02:58:19,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:19,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2217 transitions. [2022-11-23 02:58:19,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 116.6842105263158) internal successors, (2217), 19 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:19,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 262.0) internal successors, (5240), 20 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:19,616 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 262.0) internal successors, (5240), 20 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:19,616 INFO L175 Difference]: Start difference. First operand has 64 places, 76 transitions, 757 flow. Second operand 19 states and 2217 transitions. [2022-11-23 02:58:19,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 268 transitions, 2785 flow [2022-11-23 02:58:19,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 268 transitions, 2595 flow, removed 92 selfloop flow, removed 2 redundant places. [2022-11-23 02:58:19,646 INFO L231 Difference]: Finished difference. Result has 93 places, 163 transitions, 2061 flow [2022-11-23 02:58:19,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2061, PETRI_PLACES=93, PETRI_TRANSITIONS=163} [2022-11-23 02:58:19,647 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2022-11-23 02:58:19,647 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 163 transitions, 2061 flow [2022-11-23 02:58:19,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 110.84615384615384) internal successors, (1441), 13 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:19,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:19,648 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:19,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:19,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:58:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1930815491, now seen corresponding path program 1 times [2022-11-23 02:58:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:19,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666050012] [2022-11-23 02:58:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:19,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:20,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666050012] [2022-11-23 02:58:20,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666050012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:20,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393978648] [2022-11-23 02:58:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:20,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:20,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:20,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:58:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:20,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:58:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:20,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:20,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393978648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:20,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:20,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 02:58:20,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016227960] [2022-11-23 02:58:20,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:20,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:58:20,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:58:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:58:20,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 02:58:20,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 163 transitions, 2061 flow. Second operand has 10 states, 10 states have (on average 113.0) internal successors, (1130), 10 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:20,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:20,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 02:58:20,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:21,624 INFO L130 PetriNetUnfolder]: 2308/3885 cut-off events. [2022-11-23 02:58:21,625 INFO L131 PetriNetUnfolder]: For 31881/31881 co-relation queries the response was YES. [2022-11-23 02:58:21,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22765 conditions, 3885 events. 2308/3885 cut-off events. For 31881/31881 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22891 event pairs, 89 based on Foata normal form. 80/3965 useless extension candidates. Maximal degree in co-relation 22726. Up to 2067 conditions per place. [2022-11-23 02:58:21,688 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 384 selfloop transitions, 138 changer transitions 7/529 dead transitions. [2022-11-23 02:58:21,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 529 transitions, 7483 flow [2022-11-23 02:58:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:58:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:58:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1409 transitions. [2022-11-23 02:58:21,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4481552162849873 [2022-11-23 02:58:21,694 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1409 transitions. [2022-11-23 02:58:21,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1409 transitions. [2022-11-23 02:58:21,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:21,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1409 transitions. [2022-11-23 02:58:21,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.41666666666667) internal successors, (1409), 12 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:21,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 262.0) internal successors, (3406), 13 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:21,707 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 262.0) internal successors, (3406), 13 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:21,707 INFO L175 Difference]: Start difference. First operand has 93 places, 163 transitions, 2061 flow. Second operand 12 states and 1409 transitions. [2022-11-23 02:58:21,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 529 transitions, 7483 flow [2022-11-23 02:58:21,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 529 transitions, 6755 flow, removed 334 selfloop flow, removed 6 redundant places. [2022-11-23 02:58:21,865 INFO L231 Difference]: Finished difference. Result has 106 places, 283 transitions, 4109 flow [2022-11-23 02:58:21,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4109, PETRI_PLACES=106, PETRI_TRANSITIONS=283} [2022-11-23 02:58:21,867 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 78 predicate places. [2022-11-23 02:58:21,867 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 283 transitions, 4109 flow [2022-11-23 02:58:21,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 113.0) internal successors, (1130), 10 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:21,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:21,868 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:21,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:22,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:22,074 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:58:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:22,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1201421575, now seen corresponding path program 2 times [2022-11-23 02:58:22,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:22,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299638384] [2022-11-23 02:58:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:22,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:22,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:22,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299638384] [2022-11-23 02:58:22,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299638384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:22,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282087136] [2022-11-23 02:58:22,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:58:22,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:22,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:22,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:58:22,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:58:22,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 02:58:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:23,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:24,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282087136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:24,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:24,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-23 02:58:24,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008564241] [2022-11-23 02:58:24,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:24,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 02:58:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 02:58:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-23 02:58:27,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:58:30,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:58:30,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 262 [2022-11-23 02:58:30,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 283 transitions, 4109 flow. Second operand has 19 states, 19 states have (on average 105.36842105263158) internal successors, (2002), 19 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:30,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:30,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 262 [2022-11-23 02:58:30,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:32,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:58:39,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:58:41,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:58:45,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:58:47,058 INFO L130 PetriNetUnfolder]: 3448/5784 cut-off events. [2022-11-23 02:58:47,059 INFO L131 PetriNetUnfolder]: For 62403/62403 co-relation queries the response was YES. [2022-11-23 02:58:47,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38206 conditions, 5784 events. 3448/5784 cut-off events. For 62403/62403 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36508 event pairs, 150 based on Foata normal form. 13/5797 useless extension candidates. Maximal degree in co-relation 38161. Up to 3035 conditions per place. [2022-11-23 02:58:47,217 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 317 selfloop transitions, 365 changer transitions 23/705 dead transitions. [2022-11-23 02:58:47,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 705 transitions, 11016 flow [2022-11-23 02:58:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 02:58:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-23 02:58:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3199 transitions. [2022-11-23 02:58:47,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4210318504869703 [2022-11-23 02:58:47,229 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3199 transitions. [2022-11-23 02:58:47,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3199 transitions. [2022-11-23 02:58:47,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:47,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3199 transitions. [2022-11-23 02:58:47,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.3103448275862) internal successors, (3199), 29 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:47,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 262.0) internal successors, (7860), 30 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:47,311 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 262.0) internal successors, (7860), 30 states have internal predecessors, (7860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:47,311 INFO L175 Difference]: Start difference. First operand has 106 places, 283 transitions, 4109 flow. Second operand 29 states and 3199 transitions. [2022-11-23 02:58:47,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 705 transitions, 11016 flow [2022-11-23 02:58:47,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 705 transitions, 9937 flow, removed 532 selfloop flow, removed 1 redundant places. [2022-11-23 02:58:47,649 INFO L231 Difference]: Finished difference. Result has 140 places, 537 transitions, 9029 flow [2022-11-23 02:58:47,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9029, PETRI_PLACES=140, PETRI_TRANSITIONS=537} [2022-11-23 02:58:47,650 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2022-11-23 02:58:47,650 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 537 transitions, 9029 flow [2022-11-23 02:58:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.36842105263158) internal successors, (2002), 19 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:47,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:47,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:47,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:47,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:47,860 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:58:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 522677755, now seen corresponding path program 3 times [2022-11-23 02:58:47,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:47,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126045630] [2022-11-23 02:58:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:48,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126045630] [2022-11-23 02:58:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126045630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621488987] [2022-11-23 02:58:48,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:58:48,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:48,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:48,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:58:48,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:58:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:58:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:48,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621488987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:48,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-23 02:58:48,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598613777] [2022-11-23 02:58:48,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:48,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:58:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:58:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:58:48,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 02:58:48,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 537 transitions, 9029 flow. Second operand has 9 states, 9 states have (on average 113.22222222222223) internal successors, (1019), 9 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:48,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:48,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 02:58:48,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:58:51,104 INFO L130 PetriNetUnfolder]: 3842/6756 cut-off events. [2022-11-23 02:58:51,104 INFO L131 PetriNetUnfolder]: For 78711/78711 co-relation queries the response was YES. [2022-11-23 02:58:51,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46020 conditions, 6756 events. 3842/6756 cut-off events. For 78711/78711 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 46785 event pairs, 354 based on Foata normal form. 36/6792 useless extension candidates. Maximal degree in co-relation 45968. Up to 2645 conditions per place. [2022-11-23 02:58:51,216 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 420 selfloop transitions, 470 changer transitions 0/890 dead transitions. [2022-11-23 02:58:51,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 890 transitions, 16236 flow [2022-11-23 02:58:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:58:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 02:58:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1637 transitions. [2022-11-23 02:58:51,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462922573609597 [2022-11-23 02:58:51,221 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1637 transitions. [2022-11-23 02:58:51,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1637 transitions. [2022-11-23 02:58:51,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:58:51,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1637 transitions. [2022-11-23 02:58:51,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.92857142857143) internal successors, (1637), 14 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:51,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:51,233 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:51,234 INFO L175 Difference]: Start difference. First operand has 140 places, 537 transitions, 9029 flow. Second operand 14 states and 1637 transitions. [2022-11-23 02:58:51,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 890 transitions, 16236 flow [2022-11-23 02:58:51,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 890 transitions, 14074 flow, removed 1059 selfloop flow, removed 9 redundant places. [2022-11-23 02:58:51,826 INFO L231 Difference]: Finished difference. Result has 152 places, 679 transitions, 11926 flow [2022-11-23 02:58:51,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=7651, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11926, PETRI_PLACES=152, PETRI_TRANSITIONS=679} [2022-11-23 02:58:51,827 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 124 predicate places. [2022-11-23 02:58:51,827 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 679 transitions, 11926 flow [2022-11-23 02:58:51,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 113.22222222222223) internal successors, (1019), 9 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:51,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:58:51,828 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:51,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 02:58:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:58:52,034 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:58:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1794147873, now seen corresponding path program 4 times [2022-11-23 02:58:52,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444119557] [2022-11-23 02:58:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444119557] [2022-11-23 02:58:52,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444119557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:58:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57768402] [2022-11-23 02:58:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:58:52,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:52,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:52,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:52,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:58:52,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:58:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:52,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:58:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:55,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:55,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57768402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:55,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:58:55,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-23 02:58:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661003835] [2022-11-23 02:58:55,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:55,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 02:58:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 02:58:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=272, Unknown=1, NotChecked=0, Total=342 [2022-11-23 02:58:57,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 262 [2022-11-23 02:58:57,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 679 transitions, 11926 flow. Second operand has 19 states, 19 states have (on average 107.26315789473684) internal successors, (2038), 19 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:57,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:58:57,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 262 [2022-11-23 02:58:57,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:05,796 INFO L130 PetriNetUnfolder]: 4767/8444 cut-off events. [2022-11-23 02:59:05,796 INFO L131 PetriNetUnfolder]: For 104331/104331 co-relation queries the response was YES. [2022-11-23 02:59:05,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59347 conditions, 8444 events. 4767/8444 cut-off events. For 104331/104331 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 61467 event pairs, 260 based on Foata normal form. 34/8478 useless extension candidates. Maximal degree in co-relation 59292. Up to 4021 conditions per place. [2022-11-23 02:59:05,930 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 460 selfloop transitions, 609 changer transitions 28/1097 dead transitions. [2022-11-23 02:59:05,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 1097 transitions, 20359 flow [2022-11-23 02:59:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 02:59:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-23 02:59:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3491 transitions. [2022-11-23 02:59:05,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42982024131987195 [2022-11-23 02:59:05,937 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3491 transitions. [2022-11-23 02:59:05,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3491 transitions. [2022-11-23 02:59:05,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:05,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3491 transitions. [2022-11-23 02:59:05,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 112.61290322580645) internal successors, (3491), 31 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:05,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 262.0) internal successors, (8384), 32 states have internal predecessors, (8384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:05,964 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 262.0) internal successors, (8384), 32 states have internal predecessors, (8384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:05,964 INFO L175 Difference]: Start difference. First operand has 152 places, 679 transitions, 11926 flow. Second operand 31 states and 3491 transitions. [2022-11-23 02:59:05,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 1097 transitions, 20359 flow [2022-11-23 02:59:06,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 1097 transitions, 19381 flow, removed 471 selfloop flow, removed 3 redundant places. [2022-11-23 02:59:06,864 INFO L231 Difference]: Finished difference. Result has 191 places, 919 transitions, 18577 flow [2022-11-23 02:59:06,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=10760, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18577, PETRI_PLACES=191, PETRI_TRANSITIONS=919} [2022-11-23 02:59:06,865 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 163 predicate places. [2022-11-23 02:59:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 919 transitions, 18577 flow [2022-11-23 02:59:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.26315789473684) internal successors, (2038), 19 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:06,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:59:06,866 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:59:06,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:59:07,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 02:59:07,072 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:59:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:59:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash 131495185, now seen corresponding path program 5 times [2022-11-23 02:59:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:59:07,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867852664] [2022-11-23 02:59:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:59:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:59:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:59:07,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:59:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867852664] [2022-11-23 02:59:07,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867852664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:59:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893705708] [2022-11-23 02:59:07,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:59:07,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:07,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:59:07,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:59:07,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:59:07,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-23 02:59:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:59:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:59:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:59:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:08,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:59:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:59:09,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893705708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:59:09,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:59:09,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2022-11-23 02:59:09,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466564616] [2022-11-23 02:59:09,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:59:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:59:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:59:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:59:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:59:11,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:59:11,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2022-11-23 02:59:11,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 919 transitions, 18577 flow. Second operand has 15 states, 15 states have (on average 109.53333333333333) internal successors, (1643), 15 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:11,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:59:11,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2022-11-23 02:59:11,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:18,272 INFO L130 PetriNetUnfolder]: 5663/10092 cut-off events. [2022-11-23 02:59:18,272 INFO L131 PetriNetUnfolder]: For 146943/146943 co-relation queries the response was YES. [2022-11-23 02:59:18,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76076 conditions, 10092 events. 5663/10092 cut-off events. For 146943/146943 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 76347 event pairs, 370 based on Foata normal form. 19/10111 useless extension candidates. Maximal degree in co-relation 76009. Up to 4987 conditions per place. [2022-11-23 02:59:18,422 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 491 selfloop transitions, 728 changer transitions 16/1235 dead transitions. [2022-11-23 02:59:18,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1235 transitions, 26658 flow [2022-11-23 02:59:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 02:59:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-23 02:59:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2298 transitions. [2022-11-23 02:59:18,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4385496183206107 [2022-11-23 02:59:18,428 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2298 transitions. [2022-11-23 02:59:18,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2298 transitions. [2022-11-23 02:59:18,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:18,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2298 transitions. [2022-11-23 02:59:18,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 114.9) internal successors, (2298), 20 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:18,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 262.0) internal successors, (5502), 21 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:18,439 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 262.0) internal successors, (5502), 21 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:18,439 INFO L175 Difference]: Start difference. First operand has 191 places, 919 transitions, 18577 flow. Second operand 20 states and 2298 transitions. [2022-11-23 02:59:18,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1235 transitions, 26658 flow [2022-11-23 02:59:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1235 transitions, 25629 flow, removed 495 selfloop flow, removed 10 redundant places. [2022-11-23 02:59:20,173 INFO L231 Difference]: Finished difference. Result has 211 places, 1117 transitions, 25321 flow [2022-11-23 02:59:20,173 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=17576, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=25321, PETRI_PLACES=211, PETRI_TRANSITIONS=1117} [2022-11-23 02:59:20,174 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 183 predicate places. [2022-11-23 02:59:20,174 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 1117 transitions, 25321 flow [2022-11-23 02:59:20,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 109.53333333333333) internal successors, (1643), 15 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:20,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:59:20,175 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:59:20,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:59:20,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 02:59:20,380 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:59:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:59:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash -48777051, now seen corresponding path program 6 times [2022-11-23 02:59:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:59:20,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254137826] [2022-11-23 02:59:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:59:20,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:59:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:20,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:59:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254137826] [2022-11-23 02:59:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254137826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:59:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531204111] [2022-11-23 02:59:20,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:59:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:59:20,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:59:20,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:59:20,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 02:59:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:59:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:59:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:59:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:20,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:59:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:59:20,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531204111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:59:20,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:59:20,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-23 02:59:20,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382610434] [2022-11-23 02:59:20,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:59:20,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:59:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:59:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:59:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:59:20,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 02:59:20,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 1117 transitions, 25321 flow. Second operand has 9 states, 9 states have (on average 113.22222222222223) internal successors, (1019), 9 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:20,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:59:20,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 02:59:20,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:27,564 INFO L130 PetriNetUnfolder]: 6713/11933 cut-off events. [2022-11-23 02:59:27,564 INFO L131 PetriNetUnfolder]: For 206606/206606 co-relation queries the response was YES. [2022-11-23 02:59:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96304 conditions, 11933 events. 6713/11933 cut-off events. For 206606/206606 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 93469 event pairs, 562 based on Foata normal form. 136/12069 useless extension candidates. Maximal degree in co-relation 96226. Up to 4698 conditions per place. [2022-11-23 02:59:27,777 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 826 selfloop transitions, 882 changer transitions 0/1708 dead transitions. [2022-11-23 02:59:27,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 1708 transitions, 39189 flow [2022-11-23 02:59:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:59:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 02:59:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1753 transitions. [2022-11-23 02:59:27,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4460559796437659 [2022-11-23 02:59:27,781 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1753 transitions. [2022-11-23 02:59:27,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1753 transitions. [2022-11-23 02:59:27,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:27,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1753 transitions. [2022-11-23 02:59:27,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.86666666666666) internal successors, (1753), 15 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:27,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:27,790 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:27,790 INFO L175 Difference]: Start difference. First operand has 211 places, 1117 transitions, 25321 flow. Second operand 15 states and 1753 transitions. [2022-11-23 02:59:27,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 1708 transitions, 39189 flow [2022-11-23 02:59:30,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1708 transitions, 38085 flow, removed 543 selfloop flow, removed 5 redundant places. [2022-11-23 02:59:30,079 INFO L231 Difference]: Finished difference. Result has 229 places, 1335 transitions, 33365 flow [2022-11-23 02:59:30,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=24467, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=33365, PETRI_PLACES=229, PETRI_TRANSITIONS=1335} [2022-11-23 02:59:30,080 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 201 predicate places. [2022-11-23 02:59:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 1335 transitions, 33365 flow [2022-11-23 02:59:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 113.22222222222223) internal successors, (1019), 9 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:30,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:59:30,081 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:59:30,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:59:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 02:59:30,286 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:59:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:59:30,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1908957095, now seen corresponding path program 7 times [2022-11-23 02:59:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:59:30,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478652153] [2022-11-23 02:59:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:59:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:59:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:30,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:59:30,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478652153] [2022-11-23 02:59:30,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478652153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:59:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060223268] [2022-11-23 02:59:30,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:59:30,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:30,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:59:30,435 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:59:30,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:59:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:59:30,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:59:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:30,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:59:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:59:30,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060223268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:59:30,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:59:30,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-23 02:59:30,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66260624] [2022-11-23 02:59:30,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:59:30,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:59:30,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:59:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:59:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:59:30,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 02:59:30,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 1335 transitions, 33365 flow. Second operand has 9 states, 9 states have (on average 113.33333333333333) internal successors, (1020), 9 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:30,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:59:30,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 02:59:30,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:38,561 INFO L130 PetriNetUnfolder]: 6623/11821 cut-off events. [2022-11-23 02:59:38,561 INFO L131 PetriNetUnfolder]: For 253734/253734 co-relation queries the response was YES. [2022-11-23 02:59:38,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103568 conditions, 11821 events. 6623/11821 cut-off events. For 253734/253734 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 93223 event pairs, 159 based on Foata normal form. 128/11949 useless extension candidates. Maximal degree in co-relation 103482. Up to 4253 conditions per place. [2022-11-23 02:59:38,777 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 1278 selfloop transitions, 582 changer transitions 0/1860 dead transitions. [2022-11-23 02:59:38,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1860 transitions, 43803 flow [2022-11-23 02:59:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:59:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 02:59:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1746 transitions. [2022-11-23 02:59:38,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4442748091603053 [2022-11-23 02:59:38,781 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1746 transitions. [2022-11-23 02:59:38,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1746 transitions. [2022-11-23 02:59:38,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:38,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1746 transitions. [2022-11-23 02:59:38,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.4) internal successors, (1746), 15 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:38,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:38,790 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:38,790 INFO L175 Difference]: Start difference. First operand has 229 places, 1335 transitions, 33365 flow. Second operand 15 states and 1746 transitions. [2022-11-23 02:59:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1860 transitions, 43803 flow [2022-11-23 02:59:41,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1860 transitions, 43501 flow, removed 114 selfloop flow, removed 4 redundant places. [2022-11-23 02:59:41,921 INFO L231 Difference]: Finished difference. Result has 244 places, 1357 transitions, 35589 flow [2022-11-23 02:59:41,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=32214, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=35589, PETRI_PLACES=244, PETRI_TRANSITIONS=1357} [2022-11-23 02:59:41,922 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 216 predicate places. [2022-11-23 02:59:41,923 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 1357 transitions, 35589 flow [2022-11-23 02:59:41,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 113.33333333333333) internal successors, (1020), 9 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:41,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:59:41,923 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:59:41,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 02:59:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:42,124 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 02:59:42,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:59:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -901775053, now seen corresponding path program 8 times [2022-11-23 02:59:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:59:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346785683] [2022-11-23 02:59:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:59:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:59:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:59:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:59:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346785683] [2022-11-23 02:59:42,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346785683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:59:42,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607929017] [2022-11-23 02:59:42,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:59:42,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:59:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:59:42,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:59:42,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:59:42,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:59:42,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:59:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:59:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:59:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:43,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:59:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:59:44,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607929017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:59:44,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:59:44,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 15 [2022-11-23 02:59:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101330054] [2022-11-23 02:59:44,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:59:44,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:59:44,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:59:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:59:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:59:45,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 262 [2022-11-23 02:59:45,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 1357 transitions, 35589 flow. Second operand has 17 states, 17 states have (on average 110.23529411764706) internal successors, (1874), 17 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:45,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:59:45,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 262 [2022-11-23 02:59:45,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:59:56,991 INFO L130 PetriNetUnfolder]: 8231/14693 cut-off events. [2022-11-23 02:59:56,991 INFO L131 PetriNetUnfolder]: For 366412/366412 co-relation queries the response was YES. [2022-11-23 02:59:57,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139196 conditions, 14693 events. 8231/14693 cut-off events. For 366412/366412 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 119338 event pairs, 509 based on Foata normal form. 28/14721 useless extension candidates. Maximal degree in co-relation 139106. Up to 6948 conditions per place. [2022-11-23 02:59:57,294 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 697 selfloop transitions, 1232 changer transitions 35/1964 dead transitions. [2022-11-23 02:59:57,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1964 transitions, 55103 flow [2022-11-23 02:59:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 02:59:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 02:59:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3791 transitions. [2022-11-23 02:59:57,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43846865602590795 [2022-11-23 02:59:57,302 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3791 transitions. [2022-11-23 02:59:57,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3791 transitions. [2022-11-23 02:59:57,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:59:57,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3791 transitions. [2022-11-23 02:59:57,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 114.87878787878788) internal successors, (3791), 33 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:57,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 262.0) internal successors, (8908), 34 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:57,318 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 262.0) internal successors, (8908), 34 states have internal predecessors, (8908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:59:57,319 INFO L175 Difference]: Start difference. First operand has 244 places, 1357 transitions, 35589 flow. Second operand 33 states and 3791 transitions. [2022-11-23 02:59:57,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1964 transitions, 55103 flow [2022-11-23 03:00:03,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1964 transitions, 54602 flow, removed 243 selfloop flow, removed 1 redundant places. [2022-11-23 03:00:03,512 INFO L231 Difference]: Finished difference. Result has 288 places, 1766 transitions, 53256 flow [2022-11-23 03:00:03,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=35336, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=53256, PETRI_PLACES=288, PETRI_TRANSITIONS=1766} [2022-11-23 03:00:03,513 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 260 predicate places. [2022-11-23 03:00:03,513 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 1766 transitions, 53256 flow [2022-11-23 03:00:03,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 110.23529411764706) internal successors, (1874), 17 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:03,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:03,514 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:03,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:03,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:03,724 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 03:00:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 801036721, now seen corresponding path program 9 times [2022-11-23 03:00:03,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:03,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375597603] [2022-11-23 03:00:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:03,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:00:03,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:03,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375597603] [2022-11-23 03:00:03,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375597603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:00:03,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091008805] [2022-11-23 03:00:03,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:00:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:03,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:03,803 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:00:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:00:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:03,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:00:03,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:00:04,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:00:04,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091008805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:04,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:04,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-23 03:00:04,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986064667] [2022-11-23 03:00:04,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:04,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:00:04,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:00:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:00:04,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 262 [2022-11-23 03:00:04,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 1766 transitions, 53256 flow. Second operand has 8 states, 8 states have (on average 117.25) internal successors, (938), 8 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:04,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:04,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 262 [2022-11-23 03:00:04,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:12,881 INFO L130 PetriNetUnfolder]: 5810/10416 cut-off events. [2022-11-23 03:00:12,881 INFO L131 PetriNetUnfolder]: For 329034/329034 co-relation queries the response was YES. [2022-11-23 03:00:13,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100132 conditions, 10416 events. 5810/10416 cut-off events. For 329034/329034 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 80856 event pairs, 450 based on Foata normal form. 576/10992 useless extension candidates. Maximal degree in co-relation 100029. Up to 5965 conditions per place. [2022-11-23 03:00:13,132 INFO L137 encePairwiseOnDemand]: 259/262 looper letters, 916 selfloop transitions, 356 changer transitions 2/1274 dead transitions. [2022-11-23 03:00:13,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1274 transitions, 38760 flow [2022-11-23 03:00:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:00:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:00:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 611 transitions. [2022-11-23 03:00:13,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.466412213740458 [2022-11-23 03:00:13,134 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 611 transitions. [2022-11-23 03:00:13,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 611 transitions. [2022-11-23 03:00:13,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:13,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 611 transitions. [2022-11-23 03:00:13,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:13,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:13,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:13,138 INFO L175 Difference]: Start difference. First operand has 288 places, 1766 transitions, 53256 flow. Second operand 5 states and 611 transitions. [2022-11-23 03:00:13,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1274 transitions, 38760 flow [2022-11-23 03:00:17,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 1274 transitions, 33056 flow, removed 1132 selfloop flow, removed 20 redundant places. [2022-11-23 03:00:17,381 INFO L231 Difference]: Finished difference. Result has 267 places, 1190 transitions, 30379 flow [2022-11-23 03:00:17,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=27777, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=30379, PETRI_PLACES=267, PETRI_TRANSITIONS=1190} [2022-11-23 03:00:17,382 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 239 predicate places. [2022-11-23 03:00:17,383 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1190 transitions, 30379 flow [2022-11-23 03:00:17,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.25) internal successors, (938), 8 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:17,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:17,383 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:17,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:17,590 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 03:00:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1730627243, now seen corresponding path program 10 times [2022-11-23 03:00:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:17,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211296150] [2022-11-23 03:00:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:17,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211296150] [2022-11-23 03:00:17,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211296150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:00:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57937430] [2022-11-23 03:00:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:00:17,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:17,737 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:17,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:00:17,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:00:17,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:17,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:00:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:18,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57937430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:18,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:18,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 03:00:18,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619920777] [2022-11-23 03:00:18,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:00:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:00:18,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:00:18,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 03:00:18,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1190 transitions, 30379 flow. Second operand has 10 states, 10 states have (on average 113.5) internal successors, (1135), 10 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:18,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:18,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 03:00:18,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:26,182 INFO L130 PetriNetUnfolder]: 6101/10948 cut-off events. [2022-11-23 03:00:26,182 INFO L131 PetriNetUnfolder]: For 277412/277412 co-relation queries the response was YES. [2022-11-23 03:00:26,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99095 conditions, 10948 events. 6101/10948 cut-off events. For 277412/277412 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 85338 event pairs, 600 based on Foata normal form. 304/11252 useless extension candidates. Maximal degree in co-relation 99003. Up to 9286 conditions per place. [2022-11-23 03:00:26,336 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 1168 selfloop transitions, 227 changer transitions 0/1395 dead transitions. [2022-11-23 03:00:26,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1395 transitions, 37281 flow [2022-11-23 03:00:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:00:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:00:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1535 transitions. [2022-11-23 03:00:26,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4506752789195537 [2022-11-23 03:00:26,339 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1535 transitions. [2022-11-23 03:00:26,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1535 transitions. [2022-11-23 03:00:26,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:26,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1535 transitions. [2022-11-23 03:00:26,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.07692307692308) internal successors, (1535), 13 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:26,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 262.0) internal successors, (3668), 14 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:26,346 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 262.0) internal successors, (3668), 14 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:26,346 INFO L175 Difference]: Start difference. First operand has 267 places, 1190 transitions, 30379 flow. Second operand 13 states and 1535 transitions. [2022-11-23 03:00:26,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1395 transitions, 37281 flow [2022-11-23 03:00:29,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1395 transitions, 37157 flow, removed 62 selfloop flow, removed 0 redundant places. [2022-11-23 03:00:29,713 INFO L231 Difference]: Finished difference. Result has 286 places, 1272 transitions, 33375 flow [2022-11-23 03:00:29,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=29721, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=994, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=33375, PETRI_PLACES=286, PETRI_TRANSITIONS=1272} [2022-11-23 03:00:29,715 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 258 predicate places. [2022-11-23 03:00:29,715 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1272 transitions, 33375 flow [2022-11-23 03:00:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 113.5) internal successors, (1135), 10 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:29,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:29,715 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:29,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:29,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 03:00:29,921 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 03:00:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash -545356587, now seen corresponding path program 11 times [2022-11-23 03:00:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:29,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566632649] [2022-11-23 03:00:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:30,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566632649] [2022-11-23 03:00:30,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566632649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:00:30,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485896197] [2022-11-23 03:00:30,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:00:30,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:30,051 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:30,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:00:30,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-23 03:00:30,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:30,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:00:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:30,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:00:30,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485896197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:30,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:30,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-23 03:00:30,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521622089] [2022-11-23 03:00:30,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:30,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:00:30,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:00:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:00:30,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 03:00:30,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1272 transitions, 33375 flow. Second operand has 9 states, 9 states have (on average 113.33333333333333) internal successors, (1020), 9 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:30,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:30,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 03:00:30,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:38,106 INFO L130 PetriNetUnfolder]: 6234/11306 cut-off events. [2022-11-23 03:00:38,106 INFO L131 PetriNetUnfolder]: For 331633/331633 co-relation queries the response was YES. [2022-11-23 03:00:38,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107573 conditions, 11306 events. 6234/11306 cut-off events. For 331633/331633 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 89879 event pairs, 227 based on Foata normal form. 26/11332 useless extension candidates. Maximal degree in co-relation 107473. Up to 6475 conditions per place. [2022-11-23 03:00:38,341 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 1202 selfloop transitions, 269 changer transitions 14/1485 dead transitions. [2022-11-23 03:00:38,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1485 transitions, 40161 flow [2022-11-23 03:00:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 03:00:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 03:00:38,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1742 transitions. [2022-11-23 03:00:38,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44325699745547076 [2022-11-23 03:00:38,345 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1742 transitions. [2022-11-23 03:00:38,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1742 transitions. [2022-11-23 03:00:38,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:38,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1742 transitions. [2022-11-23 03:00:38,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.13333333333334) internal successors, (1742), 15 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:38,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:38,355 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 262.0) internal successors, (4192), 16 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:38,355 INFO L175 Difference]: Start difference. First operand has 286 places, 1272 transitions, 33375 flow. Second operand 15 states and 1742 transitions. [2022-11-23 03:00:38,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1485 transitions, 40161 flow [2022-11-23 03:00:42,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1485 transitions, 39028 flow, removed 522 selfloop flow, removed 3 redundant places. [2022-11-23 03:00:42,796 INFO L231 Difference]: Finished difference. Result has 300 places, 1344 transitions, 34464 flow [2022-11-23 03:00:42,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=31300, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=34464, PETRI_PLACES=300, PETRI_TRANSITIONS=1344} [2022-11-23 03:00:42,798 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 272 predicate places. [2022-11-23 03:00:42,798 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 1344 transitions, 34464 flow [2022-11-23 03:00:42,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 113.33333333333333) internal successors, (1020), 9 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:42,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:42,799 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:42,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:43,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 03:00:43,000 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 03:00:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1804727737, now seen corresponding path program 12 times [2022-11-23 03:00:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:43,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583865185] [2022-11-23 03:00:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:00:43,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583865185] [2022-11-23 03:00:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583865185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:00:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899585238] [2022-11-23 03:00:43,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:00:43,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:43,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:43,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:00:43,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-23 03:00:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:00:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:00:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:00:43,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:00:43,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899585238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:43,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:43,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 03:00:43,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014803840] [2022-11-23 03:00:43,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:43,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:00:43,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:00:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:00:43,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 03:00:43,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 1344 transitions, 34464 flow. Second operand has 10 states, 10 states have (on average 113.0) internal successors, (1130), 10 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:43,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:43,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 03:00:43,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:00:52,324 INFO L130 PetriNetUnfolder]: 6736/12385 cut-off events. [2022-11-23 03:00:52,324 INFO L131 PetriNetUnfolder]: For 404523/404523 co-relation queries the response was YES. [2022-11-23 03:00:52,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118563 conditions, 12385 events. 6736/12385 cut-off events. For 404523/404523 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 101559 event pairs, 313 based on Foata normal form. 234/12619 useless extension candidates. Maximal degree in co-relation 118460. Up to 4039 conditions per place. [2022-11-23 03:00:52,578 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 1032 selfloop transitions, 529 changer transitions 85/1646 dead transitions. [2022-11-23 03:00:52,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1646 transitions, 42085 flow [2022-11-23 03:00:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:00:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:00:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1401 transitions. [2022-11-23 03:00:52,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44561068702290074 [2022-11-23 03:00:52,582 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1401 transitions. [2022-11-23 03:00:52,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1401 transitions. [2022-11-23 03:00:52,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:00:52,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1401 transitions. [2022-11-23 03:00:52,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.75) internal successors, (1401), 12 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:52,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 262.0) internal successors, (3406), 13 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:52,587 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 262.0) internal successors, (3406), 13 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:52,587 INFO L175 Difference]: Start difference. First operand has 300 places, 1344 transitions, 34464 flow. Second operand 12 states and 1401 transitions. [2022-11-23 03:00:52,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1646 transitions, 42085 flow [2022-11-23 03:00:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1646 transitions, 41422 flow, removed 314 selfloop flow, removed 3 redundant places. [2022-11-23 03:00:57,623 INFO L231 Difference]: Finished difference. Result has 315 places, 1328 transitions, 34705 flow [2022-11-23 03:00:57,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=30325, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=34705, PETRI_PLACES=315, PETRI_TRANSITIONS=1328} [2022-11-23 03:00:57,625 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 287 predicate places. [2022-11-23 03:00:57,626 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1328 transitions, 34705 flow [2022-11-23 03:00:57,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 113.0) internal successors, (1130), 10 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:57,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:00:57,626 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:00:57,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:00:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 03:00:57,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 03:00:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:00:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1483633103, now seen corresponding path program 13 times [2022-11-23 03:00:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:00:57,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857806658] [2022-11-23 03:00:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:00:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:00:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:00:57,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:00:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857806658] [2022-11-23 03:00:57,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857806658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:00:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208927142] [2022-11-23 03:00:57,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:00:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:00:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:00:57,944 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:00:57,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 03:00:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:00:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:00:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:00:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:00:58,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:00:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:00:58,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208927142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:00:58,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:00:58,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-23 03:00:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352495372] [2022-11-23 03:00:58,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:00:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:00:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:00:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:00:58,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:00:58,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2022-11-23 03:00:58,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1328 transitions, 34705 flow. Second operand has 9 states, 9 states have (on average 113.44444444444444) internal successors, (1021), 9 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:00:58,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:00:58,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2022-11-23 03:00:58,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:01:06,576 INFO L130 PetriNetUnfolder]: 6405/11709 cut-off events. [2022-11-23 03:01:06,576 INFO L131 PetriNetUnfolder]: For 439284/439284 co-relation queries the response was YES. [2022-11-23 03:01:06,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118377 conditions, 11709 events. 6405/11709 cut-off events. For 439284/439284 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 93876 event pairs, 482 based on Foata normal form. 370/12079 useless extension candidates. Maximal degree in co-relation 118267. Up to 5997 conditions per place. [2022-11-23 03:01:06,812 INFO L137 encePairwiseOnDemand]: 257/262 looper letters, 902 selfloop transitions, 623 changer transitions 1/1526 dead transitions. [2022-11-23 03:01:06,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1526 transitions, 41733 flow [2022-11-23 03:01:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:01:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:01:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1297 transitions. [2022-11-23 03:01:06,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4500346981263012 [2022-11-23 03:01:06,816 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1297 transitions. [2022-11-23 03:01:06,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1297 transitions. [2022-11-23 03:01:06,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:01:06,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1297 transitions. [2022-11-23 03:01:06,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.9090909090909) internal successors, (1297), 11 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) [2022-11-23 03:01:06,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 262.0) internal successors, (3144), 12 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:06,822 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 262.0) internal successors, (3144), 12 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:06,822 INFO L175 Difference]: Start difference. First operand has 315 places, 1328 transitions, 34705 flow. Second operand 11 states and 1297 transitions. [2022-11-23 03:01:06,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1526 transitions, 41733 flow [2022-11-23 03:01:12,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1526 transitions, 40258 flow, removed 710 selfloop flow, removed 3 redundant places. [2022-11-23 03:01:12,265 INFO L231 Difference]: Finished difference. Result has 325 places, 1371 transitions, 36877 flow [2022-11-23 03:01:12,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=32961, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=36877, PETRI_PLACES=325, PETRI_TRANSITIONS=1371} [2022-11-23 03:01:12,267 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 297 predicate places. [2022-11-23 03:01:12,267 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1371 transitions, 36877 flow [2022-11-23 03:01:12,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 113.44444444444444) internal successors, (1021), 9 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:12,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:01:12,267 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:01:12,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:01:12,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7418b46-5b4b-4087-81bc-9cb254dd5742/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 03:01:12,468 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 03:01:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:01:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1693753321, now seen corresponding path program 14 times [2022-11-23 03:01:12,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:01:12,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124445683] [2022-11-23 03:01:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:01:12,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:01:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:01:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:01:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:01:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124445683] [2022-11-23 03:01:12,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124445683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:01:12,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:01:12,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:01:12,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421063342] [2022-11-23 03:01:12,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:01:12,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:01:12,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:01:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:01:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:01:12,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 262 [2022-11-23 03:01:12,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1371 transitions, 36877 flow. Second operand has 5 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:01:12,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:01:12,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 262 [2022-11-23 03:01:12,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand