./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R --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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- 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-38b53e6 [2022-11-25 17:46:22,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:46:22,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:46:22,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:46:22,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:46:22,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:46:22,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:46:22,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:46:22,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:46:22,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:46:22,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:46:22,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:46:22,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:46:22,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:46:22,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:46:22,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:46:22,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:46:22,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:46:22,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:46:22,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:46:22,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:46:22,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:46:22,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:46:22,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:46:22,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:46:22,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:46:22,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:46:22,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:46:22,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:46:22,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:46:22,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:46:22,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:46:22,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:46:22,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:46:22,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:46:22,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:46:22,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:46:22,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:46:22,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:46:22,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:46:22,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:46:22,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:46:23,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:46:23,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:46:23,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:46:23,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:46:23,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:46:23,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:46:23,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:46:23,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:46:23,012 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:46:23,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:46:23,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:46:23,014 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:46:23,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:46:23,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:46:23,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:46:23,015 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:46:23,016 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:46:23,016 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:46:23,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:46:23,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:46:23,017 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:46:23,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:46:23,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:46:23,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:46:23,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:46:23,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:23,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:46:23,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:46:23,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:46:23,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:46:23,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:46:23,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:46:23,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:46:23,021 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_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2022-11-25 17:46:23,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:46:23,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:46:23,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:46:23,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:46:23,407 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:46:23,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-11-25 17:46:26,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:46:27,005 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:46:27,006 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-11-25 17:46:27,068 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/data/e1a71ce07/2d843833dc1e4de788cb58d0884fc27b/FLAGf512e2080 [2022-11-25 17:46:27,131 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/data/e1a71ce07/2d843833dc1e4de788cb58d0884fc27b [2022-11-25 17:46:27,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:46:27,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:46:27,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:27,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:46:27,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:46:27,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217d6502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27, skipping insertion in model container [2022-11-25 17:46:27,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:46:27,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:46:27,550 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_a3448839-b00f-454d-a459-6e461c08af25/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2022-11-25 17:46:27,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:27,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:46:27,663 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_a3448839-b00f-454d-a459-6e461c08af25/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2022-11-25 17:46:27,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:46:27,747 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:46:27,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27 WrapperNode [2022-11-25 17:46:27,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:46:27,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:27,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:46:27,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:46:27,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,834 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-25 17:46:27,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:46:27,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:46:27,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:46:27,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:46:27,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:46:27,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:46:27,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:46:27,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:46:27,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (1/1) ... [2022-11-25 17:46:27,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:46:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:27,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:46:27,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:46:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:46:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:46:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:46:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:46:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:46:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:46:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:46:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:46:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:46:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:46:28,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:46:28,006 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:46:28,179 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:46:28,181 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:46:28,594 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:46:28,603 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:46:28,603 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 17:46:28,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:46:28 BoogieIcfgContainer [2022-11-25 17:46:28,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:46:28,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:46:28,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:46:28,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:46:28,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:46:27" (1/3) ... [2022-11-25 17:46:28,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6991c8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:46:28, skipping insertion in model container [2022-11-25 17:46:28,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:46:27" (2/3) ... [2022-11-25 17:46:28,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6991c8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:46:28, skipping insertion in model container [2022-11-25 17:46:28,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:46:28" (3/3) ... [2022-11-25 17:46:28,655 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2022-11-25 17:46:28,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:46:28,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-25 17:46:28,684 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:46:28,792 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:46:28,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 262 flow [2022-11-25 17:46:28,962 INFO L130 PetriNetUnfolder]: 18/170 cut-off events. [2022-11-25 17:46:28,963 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:46:28,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 170 events. 18/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2022-11-25 17:46:28,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 127 transitions, 262 flow [2022-11-25 17:46:28,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 127 transitions, 262 flow [2022-11-25 17:46:28,984 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:46:29,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 127 transitions, 262 flow [2022-11-25 17:46:29,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 127 transitions, 262 flow [2022-11-25 17:46:29,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 262 flow [2022-11-25 17:46:29,107 INFO L130 PetriNetUnfolder]: 18/170 cut-off events. [2022-11-25 17:46:29,107 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:46:29,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 170 events. 18/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2022-11-25 17:46:29,113 INFO L119 LiptonReduction]: Number of co-enabled transitions 2744 [2022-11-25 17:46:35,770 INFO L134 LiptonReduction]: Checked pairs total: 4707 [2022-11-25 17:46:35,770 INFO L136 LiptonReduction]: Total number of compositions: 121 [2022-11-25 17:46:35,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:46:35,798 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;@69e1cd44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:46:35,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:46:35,802 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-11-25 17:46:35,803 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:46:35,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:35,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:46:35,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash 15693, now seen corresponding path program 1 times [2022-11-25 17:46:35,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:35,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123574658] [2022-11-25 17:46:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:35,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:36,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123574658] [2022-11-25 17:46:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123574658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:36,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:46:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022367725] [2022-11-25 17:46:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:36,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:36,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:36,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2022-11-25 17:46:36,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:36,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:36,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2022-11-25 17:46:36,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:36,483 INFO L130 PetriNetUnfolder]: 97/235 cut-off events. [2022-11-25 17:46:36,484 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:46:36,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 235 events. 97/235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 952 event pairs, 80 based on Foata normal form. 13/187 useless extension candidates. Maximal degree in co-relation 428. Up to 191 conditions per place. [2022-11-25 17:46:36,487 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 29 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2022-11-25 17:46:36,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 142 flow [2022-11-25 17:46:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:46:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:46:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-11-25 17:46:36,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4879032258064516 [2022-11-25 17:46:36,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-11-25 17:46:36,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-11-25 17:46:36,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:36,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-11-25 17:46:36,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:36,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:36,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:36,542 INFO L175 Difference]: Start difference. First operand has 31 places, 37 transitions, 82 flow. Second operand 3 states and 363 transitions. [2022-11-25 17:46:36,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 142 flow [2022-11-25 17:46:36,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:46:36,550 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 64 flow [2022-11-25 17:46:36,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-11-25 17:46:36,557 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-11-25 17:46:36,557 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 64 flow [2022-11-25 17:46:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:36,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:36,558 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:46:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:46:36,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash 15694, now seen corresponding path program 1 times [2022-11-25 17:46:36,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:36,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994122944] [2022-11-25 17:46:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:36,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994122944] [2022-11-25 17:46:36,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994122944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:36,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:36,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:46:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720160908] [2022-11-25 17:46:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:36,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:36,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 248 [2022-11-25 17:46:36,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:36,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:36,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 248 [2022-11-25 17:46:36,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:36,995 INFO L130 PetriNetUnfolder]: 88/209 cut-off events. [2022-11-25 17:46:36,995 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:46:36,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 209 events. 88/209 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 738 event pairs, 70 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 403. Up to 193 conditions per place. [2022-11-25 17:46:36,997 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 30 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 17:46:36,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 146 flow [2022-11-25 17:46:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:46:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:46:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2022-11-25 17:46:37,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48118279569892475 [2022-11-25 17:46:37,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2022-11-25 17:46:37,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2022-11-25 17:46:37,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:37,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2022-11-25 17:46:37,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:37,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:37,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:37,007 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 3 states and 358 transitions. [2022-11-25 17:46:37,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 146 flow [2022-11-25 17:46:37,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:46:37,009 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 70 flow [2022-11-25 17:46:37,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-11-25 17:46:37,014 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2022-11-25 17:46:37,014 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 70 flow [2022-11-25 17:46:37,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:37,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:37,015 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:46:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:46:37,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 467820326, now seen corresponding path program 1 times [2022-11-25 17:46:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800495836] [2022-11-25 17:46:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:37,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:37,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800495836] [2022-11-25 17:46:37,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800495836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944048704] [2022-11-25 17:46:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:37,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:37,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:37,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:46:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:46:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:37,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-25 17:46:37,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 64 [2022-11-25 17:46:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:37,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:37,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944048704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:37,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:46:37,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:46:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392356012] [2022-11-25 17:46:37,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:37,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:46:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:46:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:46:37,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 248 [2022-11-25 17:46:38,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 106.875) internal successors, (855), 8 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:38,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:38,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 248 [2022-11-25 17:46:38,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:38,076 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2022-11-25 17:46:38,077 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:46:38,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 16/48 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2022-11-25 17:46:38,078 INFO L137 encePairwiseOnDemand]: 244/248 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-11-25 17:46:38,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2022-11-25 17:46:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:46:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:46:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2022-11-25 17:46:38,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4465725806451613 [2022-11-25 17:46:38,081 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2022-11-25 17:46:38,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2022-11-25 17:46:38,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:38,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2022-11-25 17:46:38,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:38,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:38,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:38,088 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 4 states and 443 transitions. [2022-11-25 17:46:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2022-11-25 17:46:38,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:46:38,090 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2022-11-25 17:46:38,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2022-11-25 17:46:38,091 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -11 predicate places. [2022-11-25 17:46:38,091 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2022-11-25 17:46:38,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.875) internal successors, (855), 8 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:38,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:38,093 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:46:38,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:38,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:38,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:38,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1617528494, now seen corresponding path program 1 times [2022-11-25 17:46:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:38,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366641625] [2022-11-25 17:46:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:38,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:46:38,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:46:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:46:38,351 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:46:38,351 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:46:38,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:46:38,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 17:46:38,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 17:46:38,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 17:46:38,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 17:46:38,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 17:46:38,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 17:46:38,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:46:38,358 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 17:46:38,361 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:46:38,362 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:46:38,395 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:46:38,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 157 transitions, 332 flow [2022-11-25 17:46:38,448 INFO L130 PetriNetUnfolder]: 32/273 cut-off events. [2022-11-25 17:46:38,448 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:46:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 273 events. 32/273 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 809 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 172. Up to 8 conditions per place. [2022-11-25 17:46:38,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 157 transitions, 332 flow [2022-11-25 17:46:38,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 157 transitions, 332 flow [2022-11-25 17:46:38,455 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:46:38,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 157 transitions, 332 flow [2022-11-25 17:46:38,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 157 transitions, 332 flow [2022-11-25 17:46:38,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 157 transitions, 332 flow [2022-11-25 17:46:38,499 INFO L130 PetriNetUnfolder]: 32/273 cut-off events. [2022-11-25 17:46:38,499 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:46:38,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 273 events. 32/273 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 809 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 172. Up to 8 conditions per place. [2022-11-25 17:46:38,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 7672 [2022-11-25 17:46:44,837 INFO L134 LiptonReduction]: Checked pairs total: 16161 [2022-11-25 17:46:44,838 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-11-25 17:46:44,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:46:44,841 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;@69e1cd44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:46:44,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:46:44,844 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 17:46:44,845 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:46:44,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:44,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:46:44,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 26090, now seen corresponding path program 1 times [2022-11-25 17:46:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:44,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132986133] [2022-11-25 17:46:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:44,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132986133] [2022-11-25 17:46:44,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132986133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:44,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:44,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:46:44,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089035317] [2022-11-25 17:46:44,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:44,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:44,987 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 295 [2022-11-25 17:46:44,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:44,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:44,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 295 [2022-11-25 17:46:44,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:45,508 INFO L130 PetriNetUnfolder]: 1748/3146 cut-off events. [2022-11-25 17:46:45,508 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-25 17:46:45,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6083 conditions, 3146 events. 1748/3146 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20048 event pairs, 840 based on Foata normal form. 624/3155 useless extension candidates. Maximal degree in co-relation 805. Up to 2869 conditions per place. [2022-11-25 17:46:45,528 INFO L137 encePairwiseOnDemand]: 277/295 looper letters, 40 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2022-11-25 17:46:45,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 214 flow [2022-11-25 17:46:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:46:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:46:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2022-11-25 17:46:45,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5141242937853108 [2022-11-25 17:46:45,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2022-11-25 17:46:45,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2022-11-25 17:46:45,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:45,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2022-11-25 17:46:45,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:45,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:45,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:45,538 INFO L175 Difference]: Start difference. First operand has 49 places, 60 transitions, 138 flow. Second operand 3 states and 455 transitions. [2022-11-25 17:46:45,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 214 flow [2022-11-25 17:46:45,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:46:45,545 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 122 flow [2022-11-25 17:46:45,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2022-11-25 17:46:45,548 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 17:46:45,549 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 122 flow [2022-11-25 17:46:45,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:45,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:45,550 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:46:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:46:45,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 26089, now seen corresponding path program 1 times [2022-11-25 17:46:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:45,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745975417] [2022-11-25 17:46:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:45,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:45,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745975417] [2022-11-25 17:46:45,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745975417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:45,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:45,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:46:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194217422] [2022-11-25 17:46:45,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:45,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 295 [2022-11-25 17:46:45,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:45,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:45,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 295 [2022-11-25 17:46:45,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:46,076 INFO L130 PetriNetUnfolder]: 1384/2520 cut-off events. [2022-11-25 17:46:46,076 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-11-25 17:46:46,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5076 conditions, 2520 events. 1384/2520 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15387 event pairs, 1252 based on Foata normal form. 0/2178 useless extension candidates. Maximal degree in co-relation 5015. Up to 2079 conditions per place. [2022-11-25 17:46:46,095 INFO L137 encePairwiseOnDemand]: 291/295 looper letters, 44 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 17:46:46,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 238 flow [2022-11-25 17:46:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:46:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:46:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2022-11-25 17:46:46,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48361581920903957 [2022-11-25 17:46:46,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2022-11-25 17:46:46,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2022-11-25 17:46:46,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:46,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2022-11-25 17:46:46,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:46,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:46,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:46,103 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 122 flow. Second operand 3 states and 428 transitions. [2022-11-25 17:46:46,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 238 flow [2022-11-25 17:46:46,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:46:46,109 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 120 flow [2022-11-25 17:46:46,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2022-11-25 17:46:46,115 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2022-11-25 17:46:46,116 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 120 flow [2022-11-25 17:46:46,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:46,116 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:46,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:46:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:46:46,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1657258858, now seen corresponding path program 1 times [2022-11-25 17:46:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:46,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619307437] [2022-11-25 17:46:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:46,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:46,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:46,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619307437] [2022-11-25 17:46:46,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619307437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:46,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8214020] [2022-11-25 17:46:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:46,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:46,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:46,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:46:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:46:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:46,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-25 17:46:46,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 64 [2022-11-25 17:46:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:46,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:46,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8214020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:46,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:46:46,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:46:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89399907] [2022-11-25 17:46:46,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:46,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:46:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:46:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:46:46,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 295 [2022-11-25 17:46:46,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 128.875) internal successors, (1031), 8 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:46,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:46,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 295 [2022-11-25 17:46:46,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:47,401 INFO L130 PetriNetUnfolder]: 1237/2211 cut-off events. [2022-11-25 17:46:47,402 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-11-25 17:46:47,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4637 conditions, 2211 events. 1237/2211 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13640 event pairs, 21 based on Foata normal form. 7/2074 useless extension candidates. Maximal degree in co-relation 4139. Up to 1682 conditions per place. [2022-11-25 17:46:47,418 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 63 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2022-11-25 17:46:47,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 322 flow [2022-11-25 17:46:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:46:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:46:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2022-11-25 17:46:47,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47796610169491527 [2022-11-25 17:46:47,421 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2022-11-25 17:46:47,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2022-11-25 17:46:47,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:47,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2022-11-25 17:46:47,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:47,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:47,428 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:47,428 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 120 flow. Second operand 5 states and 705 transitions. [2022-11-25 17:46:47,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 322 flow [2022-11-25 17:46:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:46:47,435 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 124 flow [2022-11-25 17:46:47,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-11-25 17:46:47,436 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2022-11-25 17:46:47,436 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 124 flow [2022-11-25 17:46:47,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.875) internal successors, (1031), 8 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:47,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:47,437 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:46:47,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:47,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:46:47,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1771889861, now seen corresponding path program 1 times [2022-11-25 17:46:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941998293] [2022-11-25 17:46:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:46:47,663 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:46:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:46:47,698 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:46:47,704 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:46:47,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:46:47,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 17:46:47,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 17:46:47,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 17:46:47,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 17:46:47,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 17:46:47,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 17:46:47,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:46:47,710 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-25 17:46:47,711 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:46:47,711 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:46:47,737 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:46:47,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 187 transitions, 404 flow [2022-11-25 17:46:47,814 INFO L130 PetriNetUnfolder]: 51/419 cut-off events. [2022-11-25 17:46:47,814 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:46:47,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 419 events. 51/419 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1435 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 281. Up to 16 conditions per place. [2022-11-25 17:46:47,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 187 transitions, 404 flow [2022-11-25 17:46:47,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 187 transitions, 404 flow [2022-11-25 17:46:47,821 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:46:47,822 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 187 transitions, 404 flow [2022-11-25 17:46:47,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 187 transitions, 404 flow [2022-11-25 17:46:47,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 187 transitions, 404 flow [2022-11-25 17:46:47,884 INFO L130 PetriNetUnfolder]: 51/419 cut-off events. [2022-11-25 17:46:47,884 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:46:47,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 419 events. 51/419 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1435 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 281. Up to 16 conditions per place. [2022-11-25 17:46:47,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 14112 [2022-11-25 17:46:54,084 INFO L134 LiptonReduction]: Checked pairs total: 33108 [2022-11-25 17:46:54,084 INFO L136 LiptonReduction]: Total number of compositions: 159 [2022-11-25 17:46:54,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:46:54,087 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;@69e1cd44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:46:54,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:46:54,089 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-11-25 17:46:54,089 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:46:54,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:54,089 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:46:54,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 38121, now seen corresponding path program 1 times [2022-11-25 17:46:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:54,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992395103] [2022-11-25 17:46:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:54,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992395103] [2022-11-25 17:46:54,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992395103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:54,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:54,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:46:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546038627] [2022-11-25 17:46:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:54,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:54,164 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 346 [2022-11-25 17:46:54,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:54,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:54,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 346 [2022-11-25 17:46:54,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:59,173 INFO L130 PetriNetUnfolder]: 28616/42453 cut-off events. [2022-11-25 17:46:59,173 INFO L131 PetriNetUnfolder]: For 1039/1039 co-relation queries the response was YES. [2022-11-25 17:46:59,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83620 conditions, 42453 events. 28616/42453 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 299310 event pairs, 23705 based on Foata normal form. 8529/45000 useless extension candidates. Maximal degree in co-relation 19958. Up to 33646 conditions per place. [2022-11-25 17:46:59,419 INFO L137 encePairwiseOnDemand]: 321/346 looper letters, 65 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2022-11-25 17:46:59,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 328 flow [2022-11-25 17:46:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:46:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:46:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2022-11-25 17:46:59,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5346820809248555 [2022-11-25 17:46:59,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2022-11-25 17:46:59,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2022-11-25 17:46:59,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:59,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2022-11-25 17:46:59,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:59,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:59,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:59,427 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 188 flow. Second operand 3 states and 555 transitions. [2022-11-25 17:46:59,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 328 flow [2022-11-25 17:46:59,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:46:59,432 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 146 flow [2022-11-25 17:46:59,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2022-11-25 17:46:59,434 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-11-25 17:46:59,434 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 146 flow [2022-11-25 17:46:59,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:59,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:59,435 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:46:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:46:59,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:46:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 38122, now seen corresponding path program 1 times [2022-11-25 17:46:59,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:59,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547442339] [2022-11-25 17:46:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:46:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547442339] [2022-11-25 17:46:59,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547442339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:59,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:46:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119096659] [2022-11-25 17:46:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:46:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:46:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:46:59,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 346 [2022-11-25 17:46:59,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:59,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:59,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 346 [2022-11-25 17:46:59,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:03,084 INFO L130 PetriNetUnfolder]: 26215/39493 cut-off events. [2022-11-25 17:47:03,084 INFO L131 PetriNetUnfolder]: For 1827/1827 co-relation queries the response was YES. [2022-11-25 17:47:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78274 conditions, 39493 events. 26215/39493 cut-off events. For 1827/1827 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 277704 event pairs, 16937 based on Foata normal form. 0/35685 useless extension candidates. Maximal degree in co-relation 70303. Up to 37030 conditions per place. [2022-11-25 17:47:03,316 INFO L137 encePairwiseOnDemand]: 342/346 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-11-25 17:47:03,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 272 flow [2022-11-25 17:47:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-11-25 17:47:03,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49229287090558765 [2022-11-25 17:47:03,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-11-25 17:47:03,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-11-25 17:47:03,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:03,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-11-25 17:47:03,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:03,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:03,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:03,324 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 146 flow. Second operand 3 states and 511 transitions. [2022-11-25 17:47:03,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 272 flow [2022-11-25 17:47:03,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:03,442 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 156 flow [2022-11-25 17:47:03,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2022-11-25 17:47:03,443 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2022-11-25 17:47:03,444 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 156 flow [2022-11-25 17:47:03,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:03,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:03,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:47:03,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:47:03,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash 875451275, now seen corresponding path program 1 times [2022-11-25 17:47:03,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:03,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296502870] [2022-11-25 17:47:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:03,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:03,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:03,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296502870] [2022-11-25 17:47:03,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296502870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:03,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400785767] [2022-11-25 17:47:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:03,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:03,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:03,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:03,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:47:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:47:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:03,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 74 [2022-11-25 17:47:03,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2022-11-25 17:47:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:04,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:04,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400785767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:04,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:04,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2022-11-25 17:47:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106586395] [2022-11-25 17:47:04,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:47:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:47:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:47:04,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 346 [2022-11-25 17:47:04,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 156 flow. Second operand has 9 states, 9 states have (on average 150.66666666666666) internal successors, (1356), 9 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:04,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:04,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 346 [2022-11-25 17:47:04,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:07,900 INFO L130 PetriNetUnfolder]: 24078/36774 cut-off events. [2022-11-25 17:47:07,900 INFO L131 PetriNetUnfolder]: For 2461/2461 co-relation queries the response was YES. [2022-11-25 17:47:07,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73364 conditions, 36774 events. 24078/36774 cut-off events. For 2461/2461 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 266682 event pairs, 6520 based on Foata normal form. 9/33729 useless extension candidates. Maximal degree in co-relation 65233. Up to 30450 conditions per place. [2022-11-25 17:47:08,112 INFO L137 encePairwiseOnDemand]: 341/346 looper letters, 90 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2022-11-25 17:47:08,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 444 flow [2022-11-25 17:47:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:47:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:47:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2022-11-25 17:47:08,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4867052023121387 [2022-11-25 17:47:08,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2022-11-25 17:47:08,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2022-11-25 17:47:08,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:08,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2022-11-25 17:47:08,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,123 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 346.0) internal successors, (2076), 6 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,124 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 156 flow. Second operand 5 states and 842 transitions. [2022-11-25 17:47:08,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 444 flow [2022-11-25 17:47:08,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 107 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:08,135 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 168 flow [2022-11-25 17:47:08,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2022-11-25 17:47:08,136 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2022-11-25 17:47:08,136 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 168 flow [2022-11-25 17:47:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 150.66666666666666) internal successors, (1356), 9 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:08,138 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:08,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:08,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3448839-b00f-454d-a459-6e461c08af25/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:08,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1496368920, now seen corresponding path program 1 times [2022-11-25 17:47:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:08,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620178264] [2022-11-25 17:47:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:47:08,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:08,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620178264] [2022-11-25 17:47:08,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620178264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:08,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:08,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:08,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152651305] [2022-11-25 17:47:08,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:08,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:08,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:08,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 346 [2022-11-25 17:47:08,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:08,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:08,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 346 [2022-11-25 17:47:08,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:12,926 INFO L130 PetriNetUnfolder]: 35027/52883 cut-off events. [2022-11-25 17:47:12,926 INFO L131 PetriNetUnfolder]: For 7153/7153 co-relation queries the response was YES. [2022-11-25 17:47:13,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109083 conditions, 52883 events. 35027/52883 cut-off events. For 7153/7153 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 390393 event pairs, 12979 based on Foata normal form. 0/50029 useless extension candidates. Maximal degree in co-relation 73042. Up to 35099 conditions per place. [2022-11-25 17:47:13,279 INFO L137 encePairwiseOnDemand]: 337/346 looper letters, 77 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2022-11-25 17:47:13,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 461 flow [2022-11-25 17:47:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2022-11-25 17:47:13,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.51252408477842 [2022-11-25 17:47:13,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2022-11-25 17:47:13,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2022-11-25 17:47:13,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:13,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2022-11-25 17:47:13,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,293 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 168 flow. Second operand 3 states and 532 transitions. [2022-11-25 17:47:13,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 461 flow [2022-11-25 17:47:13,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 447 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:47:13,910 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 222 flow [2022-11-25 17:47:13,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2022-11-25 17:47:13,912 INFO L288 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2022-11-25 17:47:13,912 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 222 flow [2022-11-25 17:47:13,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:13,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:13,913 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:47:13,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:47:13,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:13,914 INFO L85 PathProgramCache]: Analyzing trace with hash -469097475, now seen corresponding path program 1 times [2022-11-25 17:47:13,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:13,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344006370] [2022-11-25 17:47:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:13,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:47:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:47:13,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:47:13,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:47:13,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-25 17:47:13,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-25 17:47:13,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-25 17:47:13,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-25 17:47:13,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-25 17:47:13,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-25 17:47:13,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-25 17:47:13,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:47:13,987 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 17:47:13,988 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:47:13,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 17:47:14,018 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 17:47:14,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 217 transitions, 478 flow [2022-11-25 17:47:14,307 INFO L130 PetriNetUnfolder]: 82/653 cut-off events. [2022-11-25 17:47:14,308 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:47:14,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 653 events. 82/653 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2696 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 439. Up to 32 conditions per place. [2022-11-25 17:47:14,312 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 217 transitions, 478 flow [2022-11-25 17:47:14,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 217 transitions, 478 flow [2022-11-25 17:47:14,318 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:14,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 217 transitions, 478 flow [2022-11-25 17:47:14,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 217 transitions, 478 flow [2022-11-25 17:47:14,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 217 transitions, 478 flow [2022-11-25 17:47:14,416 INFO L130 PetriNetUnfolder]: 82/653 cut-off events. [2022-11-25 17:47:14,417 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:47:14,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 653 events. 82/653 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2696 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 439. Up to 32 conditions per place. [2022-11-25 17:47:14,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 22288 [2022-11-25 17:47:21,610 INFO L134 LiptonReduction]: Checked pairs total: 60002 [2022-11-25 17:47:21,610 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-25 17:47:21,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:21,612 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;@69e1cd44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:21,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:47:21,614 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 17:47:21,614 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:21,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:21,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:21,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-25 17:47:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 51784, now seen corresponding path program 1 times [2022-11-25 17:47:21,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347833631] [2022-11-25 17:47:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:21,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347833631] [2022-11-25 17:47:21,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347833631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:21,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:21,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:21,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719207906] [2022-11-25 17:47:21,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:21,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:21,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 397 [2022-11-25 17:47:21,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:21,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 397 [2022-11-25 17:47:21,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand