./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- 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 18:16:15,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:16:15,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:16:15,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:16:15,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:16:15,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:16:15,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:16:15,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:16:15,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:16:15,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:16:15,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:16:15,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:16:15,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:16:15,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:16:15,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:16:15,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:16:15,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:16:15,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:16:15,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:16:15,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:16:15,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:16:15,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:16:15,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:16:15,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:16:15,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:16:15,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:16:15,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:16:15,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:16:15,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:16:15,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:16:15,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:16:15,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:16:15,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:16:15,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:16:15,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:16:15,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:16:15,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:16:15,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:16:15,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:16:15,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:16:15,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:16:15,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:16:15,450 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:16:15,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:16:15,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:16:15,451 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:16:15,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:16:15,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:16:15,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:16:15,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:16:15,465 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:16:15,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:16:15,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:16:15,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:16:15,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:16:15,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:16:15,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:16:15,467 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:16:15,467 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:16:15,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:16:15,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:16:15,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:16:15,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:16:15,468 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:16:15,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:16:15,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:16:15,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:16:15,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:16:15,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:16:15,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:16:15,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:16:15,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:16:15,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:16:15,471 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:16:15,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:16:15,471 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2022-11-25 18:16:15,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:16:15,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:16:15,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:16:15,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:16:15,798 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:16:15,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-25 18:16:18,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:16:19,076 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:16:19,077 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-25 18:16:19,094 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data/2800b444a/7e5224229219431387c80608a3ed5b8b/FLAG8d18d4673 [2022-11-25 18:16:19,116 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data/2800b444a/7e5224229219431387c80608a3ed5b8b [2022-11-25 18:16:19,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:16:19,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:16:19,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:16:19,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:16:19,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:16:19,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24489aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19, skipping insertion in model container [2022-11-25 18:16:19,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:16:19,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:16:19,588 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-25 18:16:19,602 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-25 18:16:19,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:16:19,631 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:16:19,703 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-25 18:16:19,709 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-25 18:16:19,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:16:19,768 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:16:19,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19 WrapperNode [2022-11-25 18:16:19,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:16:19,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:16:19,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:16:19,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:16:19,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,843 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 135 [2022-11-25 18:16:19,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:16:19,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:16:19,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:16:19,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:16:19,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:16:19,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:16:19,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:16:19,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:16:19,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (1/1) ... [2022-11-25 18:16:19,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:16:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:19,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:16:19,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:16:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:16:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 18:16:19,979 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 18:16:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 18:16:19,983 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 18:16:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:16:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:16:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:16:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:16:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:16:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 18:16:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:16:19,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:16:19,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:16:19,986 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 18:16:20,119 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:16:20,122 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:16:20,517 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:16:20,526 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:16:20,526 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:16:20,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:20 BoogieIcfgContainer [2022-11-25 18:16:20,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:16:20,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:16:20,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:16:20,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:16:20,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:16:19" (1/3) ... [2022-11-25 18:16:20,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f407cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:16:20, skipping insertion in model container [2022-11-25 18:16:20,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:16:19" (2/3) ... [2022-11-25 18:16:20,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f407cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:16:20, skipping insertion in model container [2022-11-25 18:16:20,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:20" (3/3) ... [2022-11-25 18:16:20,539 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2022-11-25 18:16:20,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:16:20,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 18:16:20,560 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:16:20,692 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:16:20,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 166 transitions, 348 flow [2022-11-25 18:16:20,886 INFO L130 PetriNetUnfolder]: 10/164 cut-off events. [2022-11-25 18:16:20,886 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:16:20,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 10/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 324 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2022-11-25 18:16:20,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 166 transitions, 348 flow [2022-11-25 18:16:20,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 159 transitions, 330 flow [2022-11-25 18:16:20,909 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:16:20,975 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 159 transitions, 330 flow [2022-11-25 18:16:20,980 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 159 transitions, 330 flow [2022-11-25 18:16:20,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 330 flow [2022-11-25 18:16:21,052 INFO L130 PetriNetUnfolder]: 10/159 cut-off events. [2022-11-25 18:16:21,052 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:16:21,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 159 events. 10/159 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 321 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2022-11-25 18:16:21,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 5240 [2022-11-25 18:16:45,931 INFO L134 LiptonReduction]: Checked pairs total: 12299 [2022-11-25 18:16:45,931 INFO L136 LiptonReduction]: Total number of compositions: 182 [2022-11-25 18:16:45,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:16:45,955 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;@7f40a95b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:16:45,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 18:16:45,957 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:16:45,957 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:16:45,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:45,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:16:45,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash 673, now seen corresponding path program 1 times [2022-11-25 18:16:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:45,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621130232] [2022-11-25 18:16:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:45,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:46,088 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 18:16:46,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621130232] [2022-11-25 18:16:46,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621130232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:46,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:46,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:16:46,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590676508] [2022-11-25 18:16:46,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:46,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:16:46,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:16:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:16:46,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 348 [2022-11-25 18:16:46,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 18:16:46,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:46,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 348 [2022-11-25 18:16:46,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:46,384 INFO L130 PetriNetUnfolder]: 993/1520 cut-off events. [2022-11-25 18:16:46,384 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-25 18:16:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 1520 events. 993/1520 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6900 event pairs, 763 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 2821. Up to 1475 conditions per place. [2022-11-25 18:16:46,398 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 38 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2022-11-25 18:16:46,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 168 flow [2022-11-25 18:16:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:16:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:16:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 355 transitions. [2022-11-25 18:16:46,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5100574712643678 [2022-11-25 18:16:46,414 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 355 transitions. [2022-11-25 18:16:46,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 355 transitions. [2022-11-25 18:16:46,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:46,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 355 transitions. [2022-11-25 18:16:46,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.5) internal successors, (355), 2 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 18:16:46,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 18:16:46,428 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 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 18:16:46,430 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 102 flow. Second operand 2 states and 355 transitions. [2022-11-25 18:16:46,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 168 flow [2022-11-25 18:16:46,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:16:46,436 INFO L231 Difference]: Finished difference. Result has 38 places, 40 transitions, 84 flow [2022-11-25 18:16:46,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2022-11-25 18:16:46,441 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:16:46,442 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 84 flow [2022-11-25 18:16:46,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.5) internal successors, (313), 2 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 18:16:46,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:46,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:16:46,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:16:46,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:46,444 INFO L85 PathProgramCache]: Analyzing trace with hash 662548, now seen corresponding path program 1 times [2022-11-25 18:16:46,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:46,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233103064] [2022-11-25 18:16:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:46,787 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 18:16:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:46,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233103064] [2022-11-25 18:16:46,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233103064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:46,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:46,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:16:46,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021474723] [2022-11-25 18:16:46,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:46,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:16:46,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:16:46,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:46,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:16:46,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:47,109 INFO L130 PetriNetUnfolder]: 969/1475 cut-off events. [2022-11-25 18:16:47,110 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 18:16:47,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2919 conditions, 1475 events. 969/1475 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6607 event pairs, 744 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 2916. Up to 1429 conditions per place. [2022-11-25 18:16:47,120 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-25 18:16:47,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 152 flow [2022-11-25 18:16:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-11-25 18:16:47,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4703065134099617 [2022-11-25 18:16:47,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-11-25 18:16:47,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-11-25 18:16:47,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:47,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-11-25 18:16:47,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 18:16:47,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:47,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:47,140 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 84 flow. Second operand 3 states and 491 transitions. [2022-11-25 18:16:47,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 152 flow [2022-11-25 18:16:47,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:16:47,142 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 84 flow [2022-11-25 18:16:47,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-25 18:16:47,143 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:16:47,143 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 84 flow [2022-11-25 18:16:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:16:47,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:47,144 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:16:47,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:16:47,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash 662547, now seen corresponding path program 1 times [2022-11-25 18:16:47,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:47,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335674045] [2022-11-25 18:16:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:47,198 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 18:16:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335674045] [2022-11-25 18:16:47,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335674045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:47,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:47,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:16:47,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539247351] [2022-11-25 18:16:47,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:47,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:47,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2022-11-25 18:16:47,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 18:16:47,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:47,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2022-11-25 18:16:47,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:47,450 INFO L130 PetriNetUnfolder]: 945/1430 cut-off events. [2022-11-25 18:16:47,450 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 18:16:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1430 events. 945/1430 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6316 event pairs, 725 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 2829. Up to 1385 conditions per place. [2022-11-25 18:16:47,459 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-11-25 18:16:47,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 148 flow [2022-11-25 18:16:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2022-11-25 18:16:47,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2022-11-25 18:16:47,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2022-11-25 18:16:47,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2022-11-25 18:16:47,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:47,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2022-11-25 18:16:47,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 18:16:47,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:47,467 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:47,467 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 84 flow. Second operand 3 states and 477 transitions. [2022-11-25 18:16:47,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 148 flow [2022-11-25 18:16:47,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:47,468 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 80 flow [2022-11-25 18:16:47,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2022-11-25 18:16:47,469 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2022-11-25 18:16:47,469 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 80 flow [2022-11-25 18:16:47,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 18:16:47,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:47,470 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:16:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:16:47,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash 636684082, now seen corresponding path program 1 times [2022-11-25 18:16:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:47,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586608475] [2022-11-25 18:16:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:47,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:47,949 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 18:16:47,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586608475] [2022-11-25 18:16:47,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586608475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:47,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:47,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:16:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556344754] [2022-11-25 18:16:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:48,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:16:48,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 80 flow. Second operand has 3 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 18:16:48,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:48,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:16:48,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:48,417 INFO L130 PetriNetUnfolder]: 1344/2073 cut-off events. [2022-11-25 18:16:48,418 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 18:16:48,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4100 conditions, 2073 events. 1344/2073 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9216 event pairs, 503 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 4096. Up to 1232 conditions per place. [2022-11-25 18:16:48,431 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 57 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-11-25 18:16:48,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 61 transitions, 253 flow [2022-11-25 18:16:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2022-11-25 18:16:48,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49137931034482757 [2022-11-25 18:16:48,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2022-11-25 18:16:48,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2022-11-25 18:16:48,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:48,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2022-11-25 18:16:48,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 18:16:48,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:48,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:48,442 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 80 flow. Second operand 3 states and 513 transitions. [2022-11-25 18:16:48,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 61 transitions, 253 flow [2022-11-25 18:16:48,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:48,445 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 94 flow [2022-11-25 18:16:48,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2022-11-25 18:16:48,447 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2022-11-25 18:16:48,447 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 94 flow [2022-11-25 18:16:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 18:16:48,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:48,448 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:16:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:16:48,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 636684080, now seen corresponding path program 1 times [2022-11-25 18:16:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:48,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454434463] [2022-11-25 18:16:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:48,585 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 18:16:48,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:48,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454434463] [2022-11-25 18:16:48,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454434463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:48,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:48,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:16:48,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324991339] [2022-11-25 18:16:48,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:48,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:48,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:48,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 348 [2022-11-25 18:16:48,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 18:16:48,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:48,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 348 [2022-11-25 18:16:48,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:48,895 INFO L130 PetriNetUnfolder]: 1183/1798 cut-off events. [2022-11-25 18:16:48,895 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-11-25 18:16:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 1798 events. 1183/1798 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7797 event pairs, 868 based on Foata normal form. 0/1094 useless extension candidates. Maximal degree in co-relation 3741. Up to 1713 conditions per place. [2022-11-25 18:16:48,905 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 31 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 18:16:48,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 154 flow [2022-11-25 18:16:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2022-11-25 18:16:48,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.460727969348659 [2022-11-25 18:16:48,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2022-11-25 18:16:48,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2022-11-25 18:16:48,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:48,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2022-11-25 18:16:48,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 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 18:16:48,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:48,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:48,913 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 94 flow. Second operand 3 states and 481 transitions. [2022-11-25 18:16:48,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 154 flow [2022-11-25 18:16:48,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:16:48,915 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 90 flow [2022-11-25 18:16:48,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2022-11-25 18:16:48,915 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2022-11-25 18:16:48,916 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 90 flow [2022-11-25 18:16:48,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 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 18:16:48,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:48,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:16:48,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:16:48,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash 636724429, now seen corresponding path program 1 times [2022-11-25 18:16:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:48,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735545830] [2022-11-25 18:16:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:48,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:48,994 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 18:16:48,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:48,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735545830] [2022-11-25 18:16:48,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735545830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:48,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:48,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:16:48,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533496373] [2022-11-25 18:16:48,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:48,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:16:48,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:16:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:49,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 348 [2022-11-25 18:16:49,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:49,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:49,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 348 [2022-11-25 18:16:49,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:49,268 INFO L130 PetriNetUnfolder]: 874/1353 cut-off events. [2022-11-25 18:16:49,268 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-11-25 18:16:49,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 1353 events. 874/1353 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5654 event pairs, 633 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2797. Up to 1287 conditions per place. [2022-11-25 18:16:49,277 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-11-25 18:16:49,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 34 transitions, 152 flow [2022-11-25 18:16:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2022-11-25 18:16:49,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44157088122605365 [2022-11-25 18:16:49,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2022-11-25 18:16:49,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2022-11-25 18:16:49,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:49,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2022-11-25 18:16:49,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:16:49,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:49,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:49,285 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 90 flow. Second operand 3 states and 461 transitions. [2022-11-25 18:16:49,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 34 transitions, 152 flow [2022-11-25 18:16:49,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:49,287 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 88 flow [2022-11-25 18:16:49,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2022-11-25 18:16:49,288 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -9 predicate places. [2022-11-25 18:16:49,288 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 88 flow [2022-11-25 18:16:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:49,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:49,289 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:16:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:16:49,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:49,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 636724427, now seen corresponding path program 1 times [2022-11-25 18:16:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:49,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462253857] [2022-11-25 18:16:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:49,347 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 18:16:49,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462253857] [2022-11-25 18:16:49,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462253857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:49,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:49,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:16:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141630730] [2022-11-25 18:16:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:49,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 348 [2022-11-25 18:16:49,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 88 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 18:16:49,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:49,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 348 [2022-11-25 18:16:49,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:49,566 INFO L130 PetriNetUnfolder]: 565/908 cut-off events. [2022-11-25 18:16:49,566 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:16:49,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 908 events. 565/908 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3613 event pairs, 398 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 1884. Up to 861 conditions per place. [2022-11-25 18:16:49,571 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-11-25 18:16:49,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 148 flow [2022-11-25 18:16:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2022-11-25 18:16:49,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4549808429118774 [2022-11-25 18:16:49,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2022-11-25 18:16:49,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2022-11-25 18:16:49,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:49,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2022-11-25 18:16:49,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 18:16:49,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:49,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:49,579 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 88 flow. Second operand 3 states and 475 transitions. [2022-11-25 18:16:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 148 flow [2022-11-25 18:16:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:49,581 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 86 flow [2022-11-25 18:16:49,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-11-25 18:16:49,581 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2022-11-25 18:16:49,582 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 86 flow [2022-11-25 18:16:49,582 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 18:16:49,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:49,582 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:16:49,583 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2082131679, now seen corresponding path program 1 times [2022-11-25 18:16:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537117533] [2022-11-25 18:16:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:49,645 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 18:16:49,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537117533] [2022-11-25 18:16:49,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537117533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:49,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:49,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:16:49,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566708309] [2022-11-25 18:16:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:49,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:49,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:49,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:16:49,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:16:49,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:49,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:16:49,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:49,899 INFO L130 PetriNetUnfolder]: 883/1418 cut-off events. [2022-11-25 18:16:49,899 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-25 18:16:49,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999 conditions, 1418 events. 883/1418 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5924 event pairs, 301 based on Foata normal form. 52/1094 useless extension candidates. Maximal degree in co-relation 2994. Up to 883 conditions per place. [2022-11-25 18:16:49,907 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 52 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2022-11-25 18:16:49,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 253 flow [2022-11-25 18:16:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2022-11-25 18:16:49,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4875478927203065 [2022-11-25 18:16:49,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2022-11-25 18:16:49,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2022-11-25 18:16:49,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:49,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2022-11-25 18:16:49,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 18:16:49,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:49,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:49,914 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 86 flow. Second operand 3 states and 509 transitions. [2022-11-25 18:16:49,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 253 flow [2022-11-25 18:16:49,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:49,916 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 101 flow [2022-11-25 18:16:49,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2022-11-25 18:16:49,917 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -9 predicate places. [2022-11-25 18:16:49,917 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 101 flow [2022-11-25 18:16:49,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:16:49,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:49,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:49,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:16:49,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash 646489723, now seen corresponding path program 1 times [2022-11-25 18:16:49,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:49,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132917977] [2022-11-25 18:16:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:49,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:16:49,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27030257] [2022-11-25 18:16:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:49,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:49,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:49,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:16:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:16:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:50,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:50,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:50,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132917977] [2022-11-25 18:16:50,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:16:50,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27030257] [2022-11-25 18:16:50,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27030257] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:50,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:16:50,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-25 18:16:50,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540477489] [2022-11-25 18:16:50,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:50,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:16:50,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:16:50,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:50,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:50,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:16:50,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:50,435 INFO L130 PetriNetUnfolder]: 677/1154 cut-off events. [2022-11-25 18:16:50,435 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-11-25 18:16:50,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2467 conditions, 1154 events. 677/1154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5027 event pairs, 209 based on Foata normal form. 90/914 useless extension candidates. Maximal degree in co-relation 2461. Up to 766 conditions per place. [2022-11-25 18:16:50,441 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 44 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2022-11-25 18:16:50,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 228 flow [2022-11-25 18:16:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2022-11-25 18:16:50,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4789272030651341 [2022-11-25 18:16:50,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2022-11-25 18:16:50,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2022-11-25 18:16:50,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:50,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2022-11-25 18:16:50,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 18:16:50,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:50,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:50,449 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 101 flow. Second operand 3 states and 500 transitions. [2022-11-25 18:16:50,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 228 flow [2022-11-25 18:16:50,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:50,452 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 115 flow [2022-11-25 18:16:50,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2022-11-25 18:16:50,453 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2022-11-25 18:16:50,454 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 115 flow [2022-11-25 18:16:50,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:50,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:50,454 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:50,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:50,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:50,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1037334374, now seen corresponding path program 1 times [2022-11-25 18:16:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:50,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538527933] [2022-11-25 18:16:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:50,756 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 18:16:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538527933] [2022-11-25 18:16:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538527933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:50,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:50,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:16:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474221867] [2022-11-25 18:16:50,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:50,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:16:50,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:16:50,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:50,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:16:50,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:50,953 INFO L130 PetriNetUnfolder]: 419/784 cut-off events. [2022-11-25 18:16:50,954 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-11-25 18:16:50,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 784 events. 419/784 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3399 event pairs, 112 based on Foata normal form. 40/702 useless extension candidates. Maximal degree in co-relation 1760. Up to 479 conditions per place. [2022-11-25 18:16:50,958 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 34 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2022-11-25 18:16:50,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 217 flow [2022-11-25 18:16:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2022-11-25 18:16:50,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2022-11-25 18:16:50,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2022-11-25 18:16:50,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2022-11-25 18:16:50,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:50,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2022-11-25 18:16:50,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:50,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:50,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:50,965 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 115 flow. Second operand 3 states and 493 transitions. [2022-11-25 18:16:50,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 217 flow [2022-11-25 18:16:50,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:50,968 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 121 flow [2022-11-25 18:16:50,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2022-11-25 18:16:50,969 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2022-11-25 18:16:50,969 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 121 flow [2022-11-25 18:16:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:16:50,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:50,970 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:50,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:16:50,970 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash 836297534, now seen corresponding path program 1 times [2022-11-25 18:16:50,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:50,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231110404] [2022-11-25 18:16:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:50,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:51,015 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 18:16:51,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:51,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231110404] [2022-11-25 18:16:51,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231110404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:51,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:51,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:16:51,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437842876] [2022-11-25 18:16:51,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:51,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:51,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 348 [2022-11-25 18:16:51,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 18:16:51,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:51,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 348 [2022-11-25 18:16:51,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:51,196 INFO L130 PetriNetUnfolder]: 469/880 cut-off events. [2022-11-25 18:16:51,197 INFO L131 PetriNetUnfolder]: For 229/229 co-relation queries the response was YES. [2022-11-25 18:16:51,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 880 events. 469/880 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3915 event pairs, 306 based on Foata normal form. 12/830 useless extension candidates. Maximal degree in co-relation 2190. Up to 714 conditions per place. [2022-11-25 18:16:51,202 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 44 selfloop transitions, 2 changer transitions 1/49 dead transitions. [2022-11-25 18:16:51,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 268 flow [2022-11-25 18:16:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-11-25 18:16:51,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48084291187739464 [2022-11-25 18:16:51,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-11-25 18:16:51,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-11-25 18:16:51,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:51,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-11-25 18:16:51,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 18:16:51,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:51,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:51,209 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 121 flow. Second operand 3 states and 502 transitions. [2022-11-25 18:16:51,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 268 flow [2022-11-25 18:16:51,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:16:51,212 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 127 flow [2022-11-25 18:16:51,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2022-11-25 18:16:51,212 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2022-11-25 18:16:51,213 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 127 flow [2022-11-25 18:16:51,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 18:16:51,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:51,213 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:51,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:16:51,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash 113389166, now seen corresponding path program 1 times [2022-11-25 18:16:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:51,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834596922] [2022-11-25 18:16:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:51,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:51,379 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 18:16:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834596922] [2022-11-25 18:16:51,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834596922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:51,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:51,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:16:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737839579] [2022-11-25 18:16:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:51,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:51,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:16:51,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:16:51,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 18:16:51,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:51,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:16:51,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:51,570 INFO L130 PetriNetUnfolder]: 328/615 cut-off events. [2022-11-25 18:16:51,570 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2022-11-25 18:16:51,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1543 conditions, 615 events. 328/615 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2296 event pairs, 166 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 1534. Up to 382 conditions per place. [2022-11-25 18:16:51,574 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 49 selfloop transitions, 2 changer transitions 1/54 dead transitions. [2022-11-25 18:16:51,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 293 flow [2022-11-25 18:16:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2022-11-25 18:16:51,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4779693486590038 [2022-11-25 18:16:51,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2022-11-25 18:16:51,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2022-11-25 18:16:51,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:51,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2022-11-25 18:16:51,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 18:16:51,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:51,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:51,582 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 127 flow. Second operand 3 states and 499 transitions. [2022-11-25 18:16:51,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 293 flow [2022-11-25 18:16:51,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 286 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:16:51,584 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 129 flow [2022-11-25 18:16:51,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2022-11-25 18:16:51,585 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2022-11-25 18:16:51,585 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 129 flow [2022-11-25 18:16:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 18:16:51,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:51,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:16:51,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1482201575, now seen corresponding path program 1 times [2022-11-25 18:16:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746982116] [2022-11-25 18:16:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:51,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:51,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:16:51,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523981741] [2022-11-25 18:16:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:51,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:51,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:51,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:51,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:16:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:16:51,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:51,950 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 18:16:51,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:16:51,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746982116] [2022-11-25 18:16:51,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:16:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523981741] [2022-11-25 18:16:51,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523981741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:51,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:51,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:16:51,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517162371] [2022-11-25 18:16:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:51,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:16:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:16:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:52,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2022-11-25 18:16:52,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 18:16:52,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:52,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2022-11-25 18:16:52,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:52,383 INFO L130 PetriNetUnfolder]: 482/907 cut-off events. [2022-11-25 18:16:52,383 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2022-11-25 18:16:52,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 907 events. 482/907 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3764 event pairs, 214 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 2227. Up to 363 conditions per place. [2022-11-25 18:16:52,389 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 72 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2022-11-25 18:16:52,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 78 transitions, 426 flow [2022-11-25 18:16:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:16:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:16:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 660 transitions. [2022-11-25 18:16:52,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2022-11-25 18:16:52,392 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 660 transitions. [2022-11-25 18:16:52,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 660 transitions. [2022-11-25 18:16:52,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:52,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 660 transitions. [2022-11-25 18:16:52,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 18:16:52,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 18:16:52,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 18:16:52,397 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 129 flow. Second operand 4 states and 660 transitions. [2022-11-25 18:16:52,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 78 transitions, 426 flow [2022-11-25 18:16:52,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 78 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:52,400 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 139 flow [2022-11-25 18:16:52,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2022-11-25 18:16:52,401 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2022-11-25 18:16:52,401 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 139 flow [2022-11-25 18:16:52,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 18:16:52,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:52,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:52,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:52,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:16:52,609 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1296390785, now seen corresponding path program 1 times [2022-11-25 18:16:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:52,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682787145] [2022-11-25 18:16:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:52,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:16:52,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61905693] [2022-11-25 18:16:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:52,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:52,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:52,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:52,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:16:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:16:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:53,175 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 18:16:53,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:16:53,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682787145] [2022-11-25 18:16:53,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:16:53,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61905693] [2022-11-25 18:16:53,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61905693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:53,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:53,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:16:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855010596] [2022-11-25 18:16:53,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:16:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:16:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:16:53,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 348 [2022-11-25 18:16:53,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 18:16:53,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:53,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 348 [2022-11-25 18:16:53,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:53,488 INFO L130 PetriNetUnfolder]: 372/699 cut-off events. [2022-11-25 18:16:53,488 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-25 18:16:53,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 699 events. 372/699 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2616 event pairs, 162 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1752. Up to 301 conditions per place. [2022-11-25 18:16:53,492 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 63 selfloop transitions, 3 changer transitions 2/70 dead transitions. [2022-11-25 18:16:53,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 384 flow [2022-11-25 18:16:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:16:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:16:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2022-11-25 18:16:53,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46336206896551724 [2022-11-25 18:16:53,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2022-11-25 18:16:53,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2022-11-25 18:16:53,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:53,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2022-11-25 18:16:53,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 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 18:16:53,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 18:16:53,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 18:16:53,502 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 139 flow. Second operand 4 states and 645 transitions. [2022-11-25 18:16:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 384 flow [2022-11-25 18:16:53,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 70 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:16:53,505 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 145 flow [2022-11-25 18:16:53,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2022-11-25 18:16:53,506 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-11-25 18:16:53,506 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 145 flow [2022-11-25 18:16:53,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 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 18:16:53,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:53,506 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:53,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:53,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:53,713 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2086944958, now seen corresponding path program 1 times [2022-11-25 18:16:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:53,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397316004] [2022-11-25 18:16:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:53,805 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 18:16:53,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397316004] [2022-11-25 18:16:53,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397316004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:53,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510326338] [2022-11-25 18:16:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:53,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:53,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:53,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:16:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:53,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:16:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:53,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:16:53,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510326338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:53,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:16:53,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 18:16:53,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446252861] [2022-11-25 18:16:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:53,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:16:53,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:16:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:16:53,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 348 [2022-11-25 18:16:53,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 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 18:16:53,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:53,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 348 [2022-11-25 18:16:53,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:54,164 INFO L130 PetriNetUnfolder]: 467/888 cut-off events. [2022-11-25 18:16:54,165 INFO L131 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-11-25 18:16:54,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 888 events. 467/888 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3824 event pairs, 280 based on Foata normal form. 34/872 useless extension candidates. Maximal degree in co-relation 2256. Up to 670 conditions per place. [2022-11-25 18:16:54,172 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 52 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2022-11-25 18:16:54,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 334 flow [2022-11-25 18:16:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:16:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:16:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2022-11-25 18:16:54,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4837164750957854 [2022-11-25 18:16:54,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2022-11-25 18:16:54,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2022-11-25 18:16:54,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:54,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2022-11-25 18:16:54,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 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 18:16:54,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:54,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 18:16:54,180 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 145 flow. Second operand 3 states and 505 transitions. [2022-11-25 18:16:54,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 334 flow [2022-11-25 18:16:54,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:16:54,185 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 152 flow [2022-11-25 18:16:54,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2022-11-25 18:16:54,187 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-11-25 18:16:54,187 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 152 flow [2022-11-25 18:16:54,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 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 18:16:54,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:54,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:54,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:54,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:16:54,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash 800098796, now seen corresponding path program 1 times [2022-11-25 18:16:54,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:54,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614981769] [2022-11-25 18:16:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:54,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:16:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502247875] [2022-11-25 18:16:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:54,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:54,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:54,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:16:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:16:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:54,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:16:54,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2022-11-25 18:16:54,815 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-25 18:16:54,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 18:16:54,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-25 18:16:54,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 52 treesize of output 45 [2022-11-25 18:16:55,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 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 60 treesize of output 54 [2022-11-25 18:16:55,316 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 18:16:55,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:16:55,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614981769] [2022-11-25 18:16:55,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:16:55,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502247875] [2022-11-25 18:16:55,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502247875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:16:55,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:16:55,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:16:55,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263091309] [2022-11-25 18:16:55,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:16:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:16:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:16:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:16:55,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 348 [2022-11-25 18:16:55,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 18:16:55,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:55,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 348 [2022-11-25 18:16:55,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:56,590 INFO L130 PetriNetUnfolder]: 613/1166 cut-off events. [2022-11-25 18:16:56,590 INFO L131 PetriNetUnfolder]: For 640/640 co-relation queries the response was YES. [2022-11-25 18:16:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164 conditions, 1166 events. 613/1166 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4951 event pairs, 284 based on Foata normal form. 6/1104 useless extension candidates. Maximal degree in co-relation 3151. Up to 540 conditions per place. [2022-11-25 18:16:56,597 INFO L137 encePairwiseOnDemand]: 338/348 looper letters, 81 selfloop transitions, 13 changer transitions 3/99 dead transitions. [2022-11-25 18:16:56,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 99 transitions, 579 flow [2022-11-25 18:16:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:16:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:16:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1191 transitions. [2022-11-25 18:16:56,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42780172413793105 [2022-11-25 18:16:56,602 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1191 transitions. [2022-11-25 18:16:56,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1191 transitions. [2022-11-25 18:16:56,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:56,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1191 transitions. [2022-11-25 18:16:56,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.875) internal successors, (1191), 8 states have internal predecessors, (1191), 0 states have call successors, (0), 0 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 18:16:56,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 348.0) internal successors, (3132), 9 states have internal predecessors, (3132), 0 states have call successors, (0), 0 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 18:16:56,614 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 348.0) internal successors, (3132), 9 states have internal predecessors, (3132), 0 states have call successors, (0), 0 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 18:16:56,614 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 152 flow. Second operand 8 states and 1191 transitions. [2022-11-25 18:16:56,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 99 transitions, 579 flow [2022-11-25 18:16:56,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 99 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:16:56,618 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 233 flow [2022-11-25 18:16:56,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=233, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 18:16:56,619 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2022-11-25 18:16:56,619 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 233 flow [2022-11-25 18:16:56,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.875) internal successors, (1111), 8 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 18:16:56,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:56,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:56,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:16:56,827 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1532296318, now seen corresponding path program 1 times [2022-11-25 18:16:56,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:56,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606559207] [2022-11-25 18:16:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:56,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606559207] [2022-11-25 18:16:56,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606559207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312585448] [2022-11-25 18:16:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:56,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:56,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:56,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:16:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:16:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:57,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:57,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312585448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:57,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:57,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 18:16:57,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692654102] [2022-11-25 18:16:57,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:57,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:16:57,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:57,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:16:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:16:57,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:16:57,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 233 flow. Second operand has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 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 18:16:57,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:57,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:16:57,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:57,645 INFO L130 PetriNetUnfolder]: 1125/2136 cut-off events. [2022-11-25 18:16:57,645 INFO L131 PetriNetUnfolder]: For 1716/1716 co-relation queries the response was YES. [2022-11-25 18:16:57,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6145 conditions, 2136 events. 1125/2136 cut-off events. For 1716/1716 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 10681 event pairs, 389 based on Foata normal form. 264/2284 useless extension candidates. Maximal degree in co-relation 6129. Up to 759 conditions per place. [2022-11-25 18:16:57,656 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 116 selfloop transitions, 10 changer transitions 1/129 dead transitions. [2022-11-25 18:16:57,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 129 transitions, 893 flow [2022-11-25 18:16:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:16:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:16:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1011 transitions. [2022-11-25 18:16:57,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48419540229885055 [2022-11-25 18:16:57,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1011 transitions. [2022-11-25 18:16:57,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1011 transitions. [2022-11-25 18:16:57,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:57,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1011 transitions. [2022-11-25 18:16:57,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.5) internal successors, (1011), 6 states have internal predecessors, (1011), 0 states have call successors, (0), 0 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 18:16:57,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:57,667 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:57,668 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 233 flow. Second operand 6 states and 1011 transitions. [2022-11-25 18:16:57,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 129 transitions, 893 flow [2022-11-25 18:16:57,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 129 transitions, 875 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:16:57,674 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 294 flow [2022-11-25 18:16:57,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2022-11-25 18:16:57,674 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2022-11-25 18:16:57,675 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 294 flow [2022-11-25 18:16:57,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.28571428571428) internal successors, (1087), 7 states have internal predecessors, (1087), 0 states have call successors, (0), 0 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 18:16:57,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:57,676 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:57,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:16:57,882 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:16:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1030054022, now seen corresponding path program 1 times [2022-11-25 18:16:57,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:57,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814562976] [2022-11-25 18:16:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:57,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:57,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:16:57,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876297537] [2022-11-25 18:16:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:57,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:57,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:16:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:16:58,404 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:16:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:16:58,507 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:16:58,507 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:16:58,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-25 18:16:58,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 18:16:58,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 18:16:58,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 18:16:58,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 18:16:58,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-25 18:16:58,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-25 18:16:58,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 18:16:58,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 18:16:58,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-11-25 18:16:58,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-11-25 18:16:58,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-11-25 18:16:58,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 18:16:58,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 18:16:58,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-11-25 18:16:58,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2022-11-25 18:16:58,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 18:16:58,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (5 of 23 remaining) [2022-11-25 18:16:58,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 18:16:58,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 18:16:58,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-11-25 18:16:58,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 18:16:58,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 18:16:58,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:16:58,721 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:58,727 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:16:58,727 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:16:58,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:16:58 BasicIcfg [2022-11-25 18:16:58,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:16:58,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:16:58,790 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:16:58,790 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:16:58,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:16:20" (3/4) ... [2022-11-25 18:16:58,798 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 18:16:58,798 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:16:58,799 INFO L158 Benchmark]: Toolchain (without parser) took 39678.77ms. Allocated memory was 167.8MB in the beginning and 260.0MB in the end (delta: 92.3MB). Free memory was 133.4MB in the beginning and 133.0MB in the end (delta: 426.9kB). Peak memory consumption was 94.7MB. Max. memory is 16.1GB. [2022-11-25 18:16:58,799 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 167.8MB. Free memory is still 137.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:16:58,800 INFO L158 Benchmark]: CACSL2BoogieTranslator took 645.68ms. Allocated memory is still 167.8MB. Free memory was 133.1MB in the beginning and 112.2MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-25 18:16:58,800 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.85ms. Allocated memory is still 167.8MB. Free memory was 112.2MB in the beginning and 109.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:16:58,800 INFO L158 Benchmark]: Boogie Preprocessor took 31.91ms. Allocated memory is still 167.8MB. Free memory was 109.8MB in the beginning and 108.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:16:58,801 INFO L158 Benchmark]: RCFGBuilder took 651.68ms. Allocated memory is still 167.8MB. Free memory was 108.1MB in the beginning and 88.8MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-25 18:16:58,801 INFO L158 Benchmark]: TraceAbstraction took 38257.14ms. Allocated memory was 167.8MB in the beginning and 260.0MB in the end (delta: 92.3MB). Free memory was 87.8MB in the beginning and 134.1MB in the end (delta: -46.2MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. [2022-11-25 18:16:58,802 INFO L158 Benchmark]: Witness Printer took 8.89ms. Allocated memory is still 260.0MB. Free memory was 134.1MB in the beginning and 133.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:16:58,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 167.8MB. Free memory is still 137.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 645.68ms. Allocated memory is still 167.8MB. Free memory was 133.1MB in the beginning and 112.2MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.85ms. Allocated memory is still 167.8MB. Free memory was 112.2MB in the beginning and 109.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.91ms. Allocated memory is still 167.8MB. Free memory was 109.8MB in the beginning and 108.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 651.68ms. Allocated memory is still 167.8MB. Free memory was 108.1MB in the beginning and 88.8MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 38257.14ms. Allocated memory was 167.8MB in the beginning and 260.0MB in the end (delta: 92.3MB). Free memory was 87.8MB in the beginning and 134.1MB in the end (delta: -46.2MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. * Witness Printer took 8.89ms. Allocated memory is still 260.0MB. Free memory was 134.1MB in the beginning and 133.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 25.0s, 156 PlacesBefore, 44 PlacesAfterwards, 159 TransitionsBefore, 45 TransitionsAfterwards, 5240 CoEnabledTransitionPairs, 8 FixpointIterations, 65 TrivialSequentialCompositions, 90 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 25 ConcurrentYvCompositions, 2 ChoiceCompositions, 182 TotalNumberOfCompositions, 12299 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8373, independent: 8098, independent conditional: 0, independent unconditional: 8098, dependent: 257, dependent conditional: 0, dependent unconditional: 257, unknown: 18, unknown conditional: 0, unknown unconditional: 18] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3850, independent: 3787, independent conditional: 0, independent unconditional: 3787, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 7, unknown conditional: 0, unknown unconditional: 7] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3850, independent: 3710, independent conditional: 0, independent unconditional: 3710, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 140, independent: 77, independent conditional: 0, independent unconditional: 77, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 7, unknown conditional: 0, unknown unconditional: 7] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15287, independent: 147, independent conditional: 0, independent unconditional: 147, dependent: 285, dependent conditional: 0, dependent unconditional: 285, unknown: 14854, unknown conditional: 0, unknown unconditional: 14854] ], Cache Queries: [ total: 8373, independent: 4311, independent conditional: 0, independent unconditional: 4311, dependent: 201, dependent conditional: 0, dependent unconditional: 201, unknown: 3861, unknown conditional: 0, unknown unconditional: 3861] , Statistics on independence cache: Total cache size (in pairs): 374, Positive cache size: 353, Positive conditional cache size: 0, Positive unconditional cache size: 353, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 2, Unknown conditional cache size: 0, Unknown unconditional cache size: 2 - UnprovableResult [Line: 746]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 746. Possible FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=3, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=1, send=0] [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 233 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.0s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 25.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1615 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1062 mSDsluCounter, 300 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 134 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2236 IncrementalHoareTripleChecker+Invalid, 2371 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 166 mSDtfsCounter, 2236 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=294occurred in iteration=17, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 211 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 200 ConstructedInterpolants, 9 QuantifiedInterpolants, 1212 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1362 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 21 InterpolantComputations, 16 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 18:16:58,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- 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 18:17:01,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:17:01,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:17:01,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:17:01,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:17:01,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:17:01,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:17:01,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:17:01,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:17:01,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:17:01,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:17:01,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:17:01,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:17:01,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:17:01,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:17:01,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:17:01,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:17:01,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:17:01,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:17:01,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:17:01,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:17:01,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:17:01,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:17:01,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:17:01,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:17:01,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:17:01,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:17:01,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:17:01,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:17:01,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:17:01,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:17:01,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:17:01,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:17:01,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:17:01,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:17:01,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:17:01,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:17:01,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:17:01,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:17:01,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:17:01,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:17:01,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:17:01,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:17:01,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:17:01,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:17:01,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:17:01,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:17:01,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:17:01,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:17:01,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:17:01,240 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:17:01,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:17:01,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:17:01,241 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:17:01,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:17:01,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:17:01,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:17:01,242 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:17:01,242 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:17:01,242 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:17:01,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:17:01,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:17:01,243 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:17:01,243 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:17:01,243 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:17:01,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:17:01,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:17:01,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:17:01,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:17:01,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:17:01,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:17:01,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:17:01,246 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:17:01,246 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:17:01,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:17:01,246 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:17:01,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:17:01,247 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:17:01,247 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2022-11-25 18:17:01,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:17:01,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:17:01,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:17:01,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:17:01,619 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:17:01,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-25 18:17:04,734 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:17:05,125 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:17:05,126 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2022-11-25 18:17:05,149 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data/89b3687b5/283ec9fa775d40e885c013cc10f198f5/FLAG938115718 [2022-11-25 18:17:05,167 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/data/89b3687b5/283ec9fa775d40e885c013cc10f198f5 [2022-11-25 18:17:05,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:17:05,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:17:05,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:17:05,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:17:05,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:17:05,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9dc964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05, skipping insertion in model container [2022-11-25 18:17:05,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:17:05,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:17:05,690 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-25 18:17:05,700 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-25 18:17:05,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:17:05,723 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:17:05,761 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30440,30453] [2022-11-25 18:17:05,776 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_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i[30895,30908] [2022-11-25 18:17:05,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:17:05,858 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:17:05,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05 WrapperNode [2022-11-25 18:17:05,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:17:05,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:17:05,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:17:05,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:17:05,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,946 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 134 [2022-11-25 18:17:05,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:17:05,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:17:05,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:17:05,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:17:05,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:05,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:06,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:06,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:06,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:06,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:17:06,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:17:06,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:17:06,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:17:06,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (1/1) ... [2022-11-25 18:17:06,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:17:06,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:17:06,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:17:06,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:17:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-25 18:17:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:17:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 18:17:06,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 18:17:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 18:17:06,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 18:17:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:17:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:17:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:17:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-25 18:17:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:17:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:17:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 18:17:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-25 18:17:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:17:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-25 18:17:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:17:06,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:17:06,110 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 18:17:06,279 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:17:06,296 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:17:06,784 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:17:06,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:17:06,791 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:17:06,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:06 BoogieIcfgContainer [2022-11-25 18:17:06,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:17:06,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:17:06,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:17:06,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:17:06,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:17:05" (1/3) ... [2022-11-25 18:17:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9afe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:06, skipping insertion in model container [2022-11-25 18:17:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:17:05" (2/3) ... [2022-11-25 18:17:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9afe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:17:06, skipping insertion in model container [2022-11-25 18:17:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:06" (3/3) ... [2022-11-25 18:17:06,803 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2022-11-25 18:17:06,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:17:06,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 18:17:06,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:17:06,932 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:17:06,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 165 transitions, 346 flow [2022-11-25 18:17:07,038 INFO L130 PetriNetUnfolder]: 10/163 cut-off events. [2022-11-25 18:17:07,038 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:17:07,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 10/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 320 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2022-11-25 18:17:07,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 165 transitions, 346 flow [2022-11-25 18:17:07,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 328 flow [2022-11-25 18:17:07,053 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:17:07,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 158 transitions, 328 flow [2022-11-25 18:17:07,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 158 transitions, 328 flow [2022-11-25 18:17:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 328 flow [2022-11-25 18:17:07,107 INFO L130 PetriNetUnfolder]: 10/158 cut-off events. [2022-11-25 18:17:07,107 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:17:07,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 10/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 318 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2022-11-25 18:17:07,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 5032 [2022-11-25 18:18:20,518 WARN L233 SmtUtils]: Spent 50.01s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:18:27,735 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:19:05,498 WARN L233 SmtUtils]: Spent 37.76s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:19:26,972 WARN L233 SmtUtils]: Spent 21.47s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:20:02,119 WARN L233 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 191 DAG size of output: 187 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:20:12,106 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 191 DAG size of output: 184 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:20:15,196 INFO L134 LiptonReduction]: Checked pairs total: 11943 [2022-11-25 18:20:15,197 INFO L136 LiptonReduction]: Total number of compositions: 174 [2022-11-25 18:20:15,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:20:15,217 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;@79868e3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:20:15,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 18:20:15,219 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:20:15,219 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:20:15,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:15,220 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:20:15,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash 662, now seen corresponding path program 1 times [2022-11-25 18:20:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:15,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381112642] [2022-11-25 18:20:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:15,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:15,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:15,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 18:20:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:15,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 18:20:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:15,367 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 18:20:15,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:15,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381112642] [2022-11-25 18:20:15,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381112642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:15,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:20:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134280587] [2022-11-25 18:20:15,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:20:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:20:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:20:15,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 339 [2022-11-25 18:20:15,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 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 18:20:15,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:15,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 339 [2022-11-25 18:20:15,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:16,015 INFO L130 PetriNetUnfolder]: 993/1520 cut-off events. [2022-11-25 18:20:16,015 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-25 18:20:16,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 1520 events. 993/1520 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6855 event pairs, 763 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 2821. Up to 1475 conditions per place. [2022-11-25 18:20:16,028 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 38 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2022-11-25 18:20:16,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 168 flow [2022-11-25 18:20:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:20:16,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:20:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 353 transitions. [2022-11-25 18:20:16,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5206489675516224 [2022-11-25 18:20:16,044 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 353 transitions. [2022-11-25 18:20:16,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 353 transitions. [2022-11-25 18:20:16,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:16,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 353 transitions. [2022-11-25 18:20:16,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 18:20:16,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 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 18:20:16,061 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 339.0) internal successors, (1017), 3 states have internal predecessors, (1017), 0 states have call successors, (0), 0 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 18:20:16,063 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 102 flow. Second operand 2 states and 353 transitions. [2022-11-25 18:20:16,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 168 flow [2022-11-25 18:20:16,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:20:16,071 INFO L231 Difference]: Finished difference. Result has 38 places, 40 transitions, 84 flow [2022-11-25 18:20:16,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2022-11-25 18:20:16,081 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:20:16,082 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 84 flow [2022-11-25 18:20:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 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 18:20:16,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:16,083 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:20:16,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-25 18:20:16,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:16,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:16,294 INFO L85 PathProgramCache]: Analyzing trace with hash 651842, now seen corresponding path program 1 times [2022-11-25 18:20:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324647856] [2022-11-25 18:20:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:16,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:16,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:16,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 18:20:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:16,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:20:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:16,487 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 18:20:16,488 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-25 18:20:16,512 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 18:20:16,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:16,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324647856] [2022-11-25 18:20:16,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324647856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:16,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:16,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:16,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353936768] [2022-11-25 18:20:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:16,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:16,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:16,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:16,728 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2022-11-25 18:20:16,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:16,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:16,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2022-11-25 18:20:16,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:17,177 INFO L130 PetriNetUnfolder]: 969/1475 cut-off events. [2022-11-25 18:20:17,178 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 18:20:17,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2919 conditions, 1475 events. 969/1475 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6572 event pairs, 744 based on Foata normal form. 0/741 useless extension candidates. Maximal degree in co-relation 2916. Up to 1429 conditions per place. [2022-11-25 18:20:17,190 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 34 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-25 18:20:17,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 152 flow [2022-11-25 18:20:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2022-11-25 18:20:17,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46804326450344147 [2022-11-25 18:20:17,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2022-11-25 18:20:17,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2022-11-25 18:20:17,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:17,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2022-11-25 18:20:17,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 18:20:17,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:17,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:17,208 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 84 flow. Second operand 3 states and 476 transitions. [2022-11-25 18:20:17,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 152 flow [2022-11-25 18:20:17,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:20:17,210 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 84 flow [2022-11-25 18:20:17,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-25 18:20:17,212 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:20:17,212 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 84 flow [2022-11-25 18:20:17,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:17,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:17,215 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:20:17,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:17,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:17,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 651844, now seen corresponding path program 1 times [2022-11-25 18:20:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:17,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125805389] [2022-11-25 18:20:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:17,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:17,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:17,437 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:17,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 18:20:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:20:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:17,594 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:20:17,595 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 18:20:17,629 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 18:20:17,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:17,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:17,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125805389] [2022-11-25 18:20:17,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125805389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:17,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:17,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103261390] [2022-11-25 18:20:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:17,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:17,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:17,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 339 [2022-11-25 18:20:17,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 18:20:17,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:17,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 339 [2022-11-25 18:20:17,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:18,226 INFO L130 PetriNetUnfolder]: 945/1430 cut-off events. [2022-11-25 18:20:18,226 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-25 18:20:18,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1430 events. 945/1430 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6297 event pairs, 725 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 2829. Up to 1385 conditions per place. [2022-11-25 18:20:18,235 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-11-25 18:20:18,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 148 flow [2022-11-25 18:20:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2022-11-25 18:20:18,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4778761061946903 [2022-11-25 18:20:18,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2022-11-25 18:20:18,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2022-11-25 18:20:18,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:18,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2022-11-25 18:20:18,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 18:20:18,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:18,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:18,243 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 84 flow. Second operand 3 states and 486 transitions. [2022-11-25 18:20:18,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 148 flow [2022-11-25 18:20:18,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:18,245 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 80 flow [2022-11-25 18:20:18,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2022-11-25 18:20:18,246 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2022-11-25 18:20:18,246 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 80 flow [2022-11-25 18:20:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 18:20:18,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:18,247 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:20:18,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:18,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:18,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash 626416713, now seen corresponding path program 1 times [2022-11-25 18:20:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:18,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932476900] [2022-11-25 18:20:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:18,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:18,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:18,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 18:20:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:18,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:20:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:18,689 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-25 18:20:18,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-25 18:20:18,924 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 18:20:18,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:18,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932476900] [2022-11-25 18:20:18,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932476900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:18,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:18,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218927441] [2022-11-25 18:20:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:19,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 339 [2022-11-25 18:20:19,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 80 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 18:20:19,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:19,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 339 [2022-11-25 18:20:19,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:19,573 INFO L130 PetriNetUnfolder]: 789/1190 cut-off events. [2022-11-25 18:20:19,574 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 18:20:19,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 1190 events. 789/1190 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4954 event pairs, 589 based on Foata normal form. 0/652 useless extension candidates. Maximal degree in co-relation 2352. Up to 1149 conditions per place. [2022-11-25 18:20:19,581 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-11-25 18:20:19,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 140 flow [2022-11-25 18:20:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2022-11-25 18:20:19,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47885939036381514 [2022-11-25 18:20:19,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2022-11-25 18:20:19,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2022-11-25 18:20:19,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:19,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2022-11-25 18:20:19,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 18:20:19,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:19,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:19,602 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 80 flow. Second operand 3 states and 487 transitions. [2022-11-25 18:20:19,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 140 flow [2022-11-25 18:20:19,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:19,604 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 76 flow [2022-11-25 18:20:19,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2022-11-25 18:20:19,606 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2022-11-25 18:20:19,606 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 76 flow [2022-11-25 18:20:19,607 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 18:20:19,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:19,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:20:19,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:19,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:19,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 626416711, now seen corresponding path program 1 times [2022-11-25 18:20:19,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970205153] [2022-11-25 18:20:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:19,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:19,813 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:19,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 18:20:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:20:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:19,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:20:20,057 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 18:20:20,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-25 18:20:20,097 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:20:20,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:20:20,318 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 18:20:20,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:20,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970205153] [2022-11-25 18:20:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970205153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:20,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621107000] [2022-11-25 18:20:20,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:20,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:20,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 339 [2022-11-25 18:20:20,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:20:20,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:20,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 339 [2022-11-25 18:20:20,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:21,276 INFO L130 PetriNetUnfolder]: 1137/1752 cut-off events. [2022-11-25 18:20:21,277 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 18:20:21,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3460 conditions, 1752 events. 1137/1752 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7501 event pairs, 411 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 3456. Up to 1007 conditions per place. [2022-11-25 18:20:21,286 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 54 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 18:20:21,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 58 transitions, 241 flow [2022-11-25 18:20:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2022-11-25 18:20:21,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5063913470993117 [2022-11-25 18:20:21,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2022-11-25 18:20:21,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2022-11-25 18:20:21,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:21,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2022-11-25 18:20:21,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 18:20:21,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:21,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:21,294 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 76 flow. Second operand 3 states and 515 transitions. [2022-11-25 18:20:21,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 58 transitions, 241 flow [2022-11-25 18:20:21,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:21,296 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 88 flow [2022-11-25 18:20:21,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2022-11-25 18:20:21,300 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -9 predicate places. [2022-11-25 18:20:21,301 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 88 flow [2022-11-25 18:20:21,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 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 18:20:21,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:21,301 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:20:21,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:21,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:21,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash 626435836, now seen corresponding path program 1 times [2022-11-25 18:20:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53015627] [2022-11-25 18:20:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:21,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:21,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:21,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 18:20:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:20:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:21,712 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 18:20:21,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:21,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53015627] [2022-11-25 18:20:21,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53015627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:21,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:21,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940089386] [2022-11-25 18:20:21,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:21,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:21,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:22,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 339 [2022-11-25 18:20:22,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 18:20:22,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:22,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 339 [2022-11-25 18:20:22,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:22,384 INFO L130 PetriNetUnfolder]: 874/1353 cut-off events. [2022-11-25 18:20:22,384 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-11-25 18:20:22,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1353 events. 874/1353 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5651 event pairs, 633 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2820. Up to 1287 conditions per place. [2022-11-25 18:20:22,392 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 30 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2022-11-25 18:20:22,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 150 flow [2022-11-25 18:20:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:22,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-25 18:20:22,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46509341199606685 [2022-11-25 18:20:22,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-25 18:20:22,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-25 18:20:22,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:22,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-25 18:20:22,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 18:20:22,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:22,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:22,400 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 88 flow. Second operand 3 states and 473 transitions. [2022-11-25 18:20:22,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 150 flow [2022-11-25 18:20:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:20:22,402 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 88 flow [2022-11-25 18:20:22,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2022-11-25 18:20:22,403 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -9 predicate places. [2022-11-25 18:20:22,403 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 88 flow [2022-11-25 18:20:22,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 18:20:22,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:22,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:20:22,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:22,628 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash 626435835, now seen corresponding path program 1 times [2022-11-25 18:20:22,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:22,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574925042] [2022-11-25 18:20:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:22,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:22,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:22,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 18:20:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:22,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:20:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:22,780 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:20:22,780 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 18:20:22,822 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 18:20:22,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:22,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:22,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574925042] [2022-11-25 18:20:22,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574925042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:22,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:22,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:20:22,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322708423] [2022-11-25 18:20:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:22,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2022-11-25 18:20:22,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 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 18:20:22,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:22,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2022-11-25 18:20:22,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:23,290 INFO L130 PetriNetUnfolder]: 565/908 cut-off events. [2022-11-25 18:20:23,291 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:20:23,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1889 conditions, 908 events. 565/908 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3601 event pairs, 398 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 1884. Up to 861 conditions per place. [2022-11-25 18:20:23,297 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 29 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-11-25 18:20:23,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 148 flow [2022-11-25 18:20:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2022-11-25 18:20:23,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4611602753195674 [2022-11-25 18:20:23,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2022-11-25 18:20:23,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2022-11-25 18:20:23,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:23,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2022-11-25 18:20:23,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 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 18:20:23,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:23,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:23,307 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 88 flow. Second operand 3 states and 469 transitions. [2022-11-25 18:20:23,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 148 flow [2022-11-25 18:20:23,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:23,309 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 86 flow [2022-11-25 18:20:23,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-11-25 18:20:23,310 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -10 predicate places. [2022-11-25 18:20:23,310 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 86 flow [2022-11-25 18:20:23,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 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 18:20:23,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:23,311 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:23,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:23,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 517362090, now seen corresponding path program 1 times [2022-11-25 18:20:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:23,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125614391] [2022-11-25 18:20:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:23,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:23,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:23,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:23,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 18:20:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:20:23,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:23,681 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 18:20:23,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:23,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:23,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125614391] [2022-11-25 18:20:23,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125614391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:23,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:23,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72480768] [2022-11-25 18:20:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:23,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:23,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:23,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 339 [2022-11-25 18:20:23,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 86 flow. Second operand has 3 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 18:20:23,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:23,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 339 [2022-11-25 18:20:23,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:24,151 INFO L130 PetriNetUnfolder]: 856/1391 cut-off events. [2022-11-25 18:20:24,151 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-25 18:20:24,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2945 conditions, 1391 events. 856/1391 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5971 event pairs, 292 based on Foata normal form. 52/1069 useless extension candidates. Maximal degree in co-relation 2940. Up to 835 conditions per place. [2022-11-25 18:20:24,161 INFO L137 encePairwiseOnDemand]: 332/339 looper letters, 51 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2022-11-25 18:20:24,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 253 flow [2022-11-25 18:20:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2022-11-25 18:20:24,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4945919370698132 [2022-11-25 18:20:24,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2022-11-25 18:20:24,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2022-11-25 18:20:24,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:24,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2022-11-25 18:20:24,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 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 18:20:24,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:24,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:24,172 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 86 flow. Second operand 3 states and 503 transitions. [2022-11-25 18:20:24,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 253 flow [2022-11-25 18:20:24,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:24,174 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 112 flow [2022-11-25 18:20:24,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2022-11-25 18:20:24,175 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2022-11-25 18:20:24,175 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 112 flow [2022-11-25 18:20:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 18:20:24,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:24,176 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:24,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:24,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1870351636, now seen corresponding path program 1 times [2022-11-25 18:20:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:24,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372309453] [2022-11-25 18:20:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:24,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:24,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:24,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 18:20:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:20:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:24,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:24,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372309453] [2022-11-25 18:20:24,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372309453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:24,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:24,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:24,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895262893] [2022-11-25 18:20:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:24,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 339 [2022-11-25 18:20:24,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 18:20:24,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:24,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 339 [2022-11-25 18:20:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:25,000 INFO L130 PetriNetUnfolder]: 681/1158 cut-off events. [2022-11-25 18:20:25,001 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-11-25 18:20:25,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 1158 events. 681/1158 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5103 event pairs, 241 based on Foata normal form. 90/988 useless extension candidates. Maximal degree in co-relation 2584. Up to 770 conditions per place. [2022-11-25 18:20:25,006 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2022-11-25 18:20:25,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 50 transitions, 243 flow [2022-11-25 18:20:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-11-25 18:20:25,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4886922320550639 [2022-11-25 18:20:25,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-11-25 18:20:25,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-11-25 18:20:25,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:25,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-11-25 18:20:25,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 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 18:20:25,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:25,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:25,015 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 112 flow. Second operand 3 states and 497 transitions. [2022-11-25 18:20:25,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 50 transitions, 243 flow [2022-11-25 18:20:25,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:25,018 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 124 flow [2022-11-25 18:20:25,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2022-11-25 18:20:25,019 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:20:25,020 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 124 flow [2022-11-25 18:20:25,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 18:20:25,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:25,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:25,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:25,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:25,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1992496506, now seen corresponding path program 1 times [2022-11-25 18:20:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:25,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434200302] [2022-11-25 18:20:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:25,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:25,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:25,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:25,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 18:20:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:20:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:25,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-25 18:20:25,394 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 18:20:25,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:25,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434200302] [2022-11-25 18:20:25,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434200302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:25,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:25,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:20:25,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849920282] [2022-11-25 18:20:25,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:25,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:25,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:25,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:25,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:25,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 339 [2022-11-25 18:20:25,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 124 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 18:20:25,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:25,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 339 [2022-11-25 18:20:25,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:25,815 INFO L130 PetriNetUnfolder]: 407/760 cut-off events. [2022-11-25 18:20:25,815 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-25 18:20:25,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 760 events. 407/760 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3381 event pairs, 114 based on Foata normal form. 68/744 useless extension candidates. Maximal degree in co-relation 1763. Up to 467 conditions per place. [2022-11-25 18:20:25,819 INFO L137 encePairwiseOnDemand]: 333/339 looper letters, 34 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2022-11-25 18:20:25,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 228 flow [2022-11-25 18:20:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-11-25 18:20:25,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48180924287118976 [2022-11-25 18:20:25,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-11-25 18:20:25,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-11-25 18:20:25,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:25,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-11-25 18:20:25,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 18:20:25,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:25,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:25,828 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 124 flow. Second operand 3 states and 490 transitions. [2022-11-25 18:20:25,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 228 flow [2022-11-25 18:20:25,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:25,834 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 132 flow [2022-11-25 18:20:25,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2022-11-25 18:20:25,836 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2022-11-25 18:20:25,837 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 132 flow [2022-11-25 18:20:25,837 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 18:20:25,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:25,837 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:25,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:26,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:26,049 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:26,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -770959218, now seen corresponding path program 1 times [2022-11-25 18:20:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:26,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268776417] [2022-11-25 18:20:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:26,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:26,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 18:20:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:20:26,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:26,256 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 18:20:26,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:26,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:26,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268776417] [2022-11-25 18:20:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268776417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:26,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:26,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019910812] [2022-11-25 18:20:26,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:26,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 339 [2022-11-25 18:20:26,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 18:20:26,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:26,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 339 [2022-11-25 18:20:26,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:26,704 INFO L130 PetriNetUnfolder]: 323/604 cut-off events. [2022-11-25 18:20:26,705 INFO L131 PetriNetUnfolder]: For 214/214 co-relation queries the response was YES. [2022-11-25 18:20:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 604 events. 323/604 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2331 event pairs, 174 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 1544. Up to 341 conditions per place. [2022-11-25 18:20:26,708 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 48 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2022-11-25 18:20:26,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 295 flow [2022-11-25 18:20:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2022-11-25 18:20:26,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48770894788593905 [2022-11-25 18:20:26,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2022-11-25 18:20:26,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2022-11-25 18:20:26,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:26,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2022-11-25 18:20:26,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 18:20:26,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:26,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:26,716 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 132 flow. Second operand 3 states and 496 transitions. [2022-11-25 18:20:26,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 295 flow [2022-11-25 18:20:26,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 276 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:20:26,719 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 128 flow [2022-11-25 18:20:26,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2022-11-25 18:20:26,719 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-11-25 18:20:26,720 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 128 flow [2022-11-25 18:20:26,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 18:20:26,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:26,720 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:26,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:26,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:26,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1000747550, now seen corresponding path program 1 times [2022-11-25 18:20:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001214806] [2022-11-25 18:20:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:26,940 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:26,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 18:20:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:20:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:27,070 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 18:20:27,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:27,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:27,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001214806] [2022-11-25 18:20:27,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001214806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:27,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:27,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:20:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831353671] [2022-11-25 18:20:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:27,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 339 [2022-11-25 18:20:27,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 18:20:27,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:27,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 339 [2022-11-25 18:20:27,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:27,488 INFO L130 PetriNetUnfolder]: 322/603 cut-off events. [2022-11-25 18:20:27,488 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-11-25 18:20:27,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 603 events. 322/603 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2421 event pairs, 202 based on Foata normal form. 12/603 useless extension candidates. Maximal degree in co-relation 1435. Up to 472 conditions per place. [2022-11-25 18:20:27,491 INFO L137 encePairwiseOnDemand]: 336/339 looper letters, 43 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2022-11-25 18:20:27,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 48 transitions, 261 flow [2022-11-25 18:20:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-11-25 18:20:27,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4896755162241888 [2022-11-25 18:20:27,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-11-25 18:20:27,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-11-25 18:20:27,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:27,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-11-25 18:20:27,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 18:20:27,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:27,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:27,498 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 128 flow. Second operand 3 states and 498 transitions. [2022-11-25 18:20:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 48 transitions, 261 flow [2022-11-25 18:20:27,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:27,501 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 137 flow [2022-11-25 18:20:27,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-11-25 18:20:27,502 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2022-11-25 18:20:27,502 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 137 flow [2022-11-25 18:20:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 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 18:20:27,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:27,502 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:27,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:27,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:27,714 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -940988367, now seen corresponding path program 1 times [2022-11-25 18:20:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:27,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856008253] [2022-11-25 18:20:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:27,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:27,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:27,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 18:20:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:20:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:28,133 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 18:20:28,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:28,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:28,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856008253] [2022-11-25 18:20:28,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856008253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:28,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:28,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484771976] [2022-11-25 18:20:28,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:20:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:20:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:20:28,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 339 [2022-11-25 18:20:28,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 18:20:28,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:28,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 339 [2022-11-25 18:20:28,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:29,240 INFO L130 PetriNetUnfolder]: 470/883 cut-off events. [2022-11-25 18:20:29,240 INFO L131 PetriNetUnfolder]: For 313/313 co-relation queries the response was YES. [2022-11-25 18:20:29,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 883 events. 470/883 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3593 event pairs, 208 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 2229. Up to 351 conditions per place. [2022-11-25 18:20:29,246 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 74 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2022-11-25 18:20:29,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 80 transitions, 449 flow [2022-11-25 18:20:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:20:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:20:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 656 transitions. [2022-11-25 18:20:29,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4837758112094395 [2022-11-25 18:20:29,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 656 transitions. [2022-11-25 18:20:29,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 656 transitions. [2022-11-25 18:20:29,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:29,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 656 transitions. [2022-11-25 18:20:29,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 18:20:29,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 18:20:29,255 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 18:20:29,255 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 137 flow. Second operand 4 states and 656 transitions. [2022-11-25 18:20:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 80 transitions, 449 flow [2022-11-25 18:20:29,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 80 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:20:29,258 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 149 flow [2022-11-25 18:20:29,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2022-11-25 18:20:29,259 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2022-11-25 18:20:29,259 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 149 flow [2022-11-25 18:20:29,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 18:20:29,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:29,260 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:29,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:29,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:29,475 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:29,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:29,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1065275951, now seen corresponding path program 1 times [2022-11-25 18:20:29,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:29,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265401852] [2022-11-25 18:20:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:29,477 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:29,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 18:20:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:20:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:20:29,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:29,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:29,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265401852] [2022-11-25 18:20:29,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265401852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:29,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:29,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:20:29,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246032940] [2022-11-25 18:20:29,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:29,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:20:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:20:29,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:20:29,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 339 [2022-11-25 18:20:29,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:29,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:29,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 339 [2022-11-25 18:20:29,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:29,994 INFO L130 PetriNetUnfolder]: 399/752 cut-off events. [2022-11-25 18:20:29,994 INFO L131 PetriNetUnfolder]: For 349/349 co-relation queries the response was YES. [2022-11-25 18:20:29,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1925 conditions, 752 events. 399/752 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2934 event pairs, 178 based on Foata normal form. 16/756 useless extension candidates. Maximal degree in co-relation 1914. Up to 462 conditions per place. [2022-11-25 18:20:29,998 INFO L137 encePairwiseOnDemand]: 334/339 looper letters, 43 selfloop transitions, 4 changer transitions 2/50 dead transitions. [2022-11-25 18:20:29,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 281 flow [2022-11-25 18:20:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:20:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:20:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2022-11-25 18:20:30,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48770894788593905 [2022-11-25 18:20:30,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2022-11-25 18:20:30,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2022-11-25 18:20:30,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:30,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2022-11-25 18:20:30,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 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 18:20:30,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:30,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 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 18:20:30,006 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 149 flow. Second operand 3 states and 496 transitions. [2022-11-25 18:20:30,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 281 flow [2022-11-25 18:20:30,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:20:30,008 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 148 flow [2022-11-25 18:20:30,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2022-11-25 18:20:30,009 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2022-11-25 18:20:30,009 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 148 flow [2022-11-25 18:20:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:20:30,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:30,010 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:30,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:30,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:30,221 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 695312119, now seen corresponding path program 1 times [2022-11-25 18:20:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:30,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46847993] [2022-11-25 18:20:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:30,224 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:30,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 18:20:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:30,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:20:30,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:30,879 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 18:20:30,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:30,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:30,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46847993] [2022-11-25 18:20:30,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46847993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:30,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:30,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:20:30,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030259333] [2022-11-25 18:20:30,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:30,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:20:30,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:20:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:20:31,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 339 [2022-11-25 18:20:31,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 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 18:20:31,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:31,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 339 [2022-11-25 18:20:31,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:31,886 INFO L130 PetriNetUnfolder]: 317/606 cut-off events. [2022-11-25 18:20:31,887 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2022-11-25 18:20:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 606 events. 317/606 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2133 event pairs, 115 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 1558. Up to 285 conditions per place. [2022-11-25 18:20:31,890 INFO L137 encePairwiseOnDemand]: 335/339 looper letters, 55 selfloop transitions, 3 changer transitions 2/62 dead transitions. [2022-11-25 18:20:31,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 354 flow [2022-11-25 18:20:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:20:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:20:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 634 transitions. [2022-11-25 18:20:31,898 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46755162241887904 [2022-11-25 18:20:31,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 634 transitions. [2022-11-25 18:20:31,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 634 transitions. [2022-11-25 18:20:31,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:31,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 634 transitions. [2022-11-25 18:20:31,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.5) internal successors, (634), 4 states have internal predecessors, (634), 0 states have call successors, (0), 0 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 18:20:31,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 18:20:31,904 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 18:20:31,904 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 148 flow. Second operand 4 states and 634 transitions. [2022-11-25 18:20:31,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 354 flow [2022-11-25 18:20:31,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:20:31,924 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 154 flow [2022-11-25 18:20:31,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2022-11-25 18:20:31,925 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-11-25 18:20:31,925 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 154 flow [2022-11-25 18:20:31,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 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 18:20:31,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:31,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:31,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:32,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:32,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 79847527, now seen corresponding path program 1 times [2022-11-25 18:20:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:32,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973524161] [2022-11-25 18:20:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:32,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:32,128 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:32,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 18:20:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:32,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:20:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:32,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-25 18:20:32,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 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 18 treesize of output 10 [2022-11-25 18:20:32,696 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 18:20:32,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:32,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973524161] [2022-11-25 18:20:32,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973524161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:32,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:32,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:20:32,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777738803] [2022-11-25 18:20:32,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:32,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:20:32,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:20:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:20:33,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 339 [2022-11-25 18:20:33,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 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 18:20:33,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:33,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 339 [2022-11-25 18:20:33,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:34,993 INFO L130 PetriNetUnfolder]: 480/919 cut-off events. [2022-11-25 18:20:34,994 INFO L131 PetriNetUnfolder]: For 506/506 co-relation queries the response was YES. [2022-11-25 18:20:34,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 919 events. 480/919 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3928 event pairs, 142 based on Foata normal form. 22/941 useless extension candidates. Maximal degree in co-relation 2417. Up to 512 conditions per place. [2022-11-25 18:20:34,999 INFO L137 encePairwiseOnDemand]: 328/339 looper letters, 81 selfloop transitions, 16 changer transitions 4/103 dead transitions. [2022-11-25 18:20:34,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 103 transitions, 593 flow [2022-11-25 18:20:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:20:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:20:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1398 transitions. [2022-11-25 18:20:35,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41238938053097346 [2022-11-25 18:20:35,005 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1398 transitions. [2022-11-25 18:20:35,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1398 transitions. [2022-11-25 18:20:35,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:35,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1398 transitions. [2022-11-25 18:20:35,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 139.8) internal successors, (1398), 10 states have internal predecessors, (1398), 0 states have call successors, (0), 0 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 18:20:35,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 339.0) internal successors, (3729), 11 states have internal predecessors, (3729), 0 states have call successors, (0), 0 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 18:20:35,016 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 339.0) internal successors, (3729), 11 states have internal predecessors, (3729), 0 states have call successors, (0), 0 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 18:20:35,016 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 154 flow. Second operand 10 states and 1398 transitions. [2022-11-25 18:20:35,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 103 transitions, 593 flow [2022-11-25 18:20:35,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 103 transitions, 579 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:20:35,020 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 269 flow [2022-11-25 18:20:35,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2022-11-25 18:20:35,020 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2022-11-25 18:20:35,021 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 269 flow [2022-11-25 18:20:35,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.14285714285714) internal successors, (925), 7 states have internal predecessors, (925), 0 states have call successors, (0), 0 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 18:20:35,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:35,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:35,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:35,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:35,240 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1011142055, now seen corresponding path program 2 times [2022-11-25 18:20:35,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:35,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079133301] [2022-11-25 18:20:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:20:35,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:35,243 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:35,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 18:20:35,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:20:35,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:20:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:35,614 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-25 18:20:35,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-25 18:20:35,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-25 18:20:35,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-25 18:20:36,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 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 18 treesize of output 10 [2022-11-25 18:20:36,161 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 18:20:36,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:36,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:20:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079133301] [2022-11-25 18:20:36,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079133301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:36,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:36,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:20:36,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734450523] [2022-11-25 18:20:36,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:36,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:20:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:20:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:20:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:20:37,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 339 [2022-11-25 18:20:37,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 269 flow. Second operand has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 18:20:37,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:20:37,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 339 [2022-11-25 18:20:37,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:20:38,892 INFO L130 PetriNetUnfolder]: 521/1002 cut-off events. [2022-11-25 18:20:38,892 INFO L131 PetriNetUnfolder]: For 1082/1082 co-relation queries the response was YES. [2022-11-25 18:20:38,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3084 conditions, 1002 events. 521/1002 cut-off events. For 1082/1082 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4470 event pairs, 118 based on Foata normal form. 44/1046 useless extension candidates. Maximal degree in co-relation 3066. Up to 328 conditions per place. [2022-11-25 18:20:38,900 INFO L137 encePairwiseOnDemand]: 329/339 looper letters, 79 selfloop transitions, 25 changer transitions 6/112 dead transitions. [2022-11-25 18:20:38,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 112 transitions, 767 flow [2022-11-25 18:20:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:20:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:20:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1379 transitions. [2022-11-25 18:20:38,905 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4067846607669616 [2022-11-25 18:20:38,905 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1379 transitions. [2022-11-25 18:20:38,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1379 transitions. [2022-11-25 18:20:38,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:20:38,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1379 transitions. [2022-11-25 18:20:38,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.9) internal successors, (1379), 10 states have internal predecessors, (1379), 0 states have call successors, (0), 0 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 18:20:38,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 339.0) internal successors, (3729), 11 states have internal predecessors, (3729), 0 states have call successors, (0), 0 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 18:20:38,915 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 339.0) internal successors, (3729), 11 states have internal predecessors, (3729), 0 states have call successors, (0), 0 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 18:20:38,915 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 269 flow. Second operand 10 states and 1379 transitions. [2022-11-25 18:20:38,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 112 transitions, 767 flow [2022-11-25 18:20:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 757 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:20:38,922 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 435 flow [2022-11-25 18:20:38,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=435, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2022-11-25 18:20:38,923 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2022-11-25 18:20:38,923 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 435 flow [2022-11-25 18:20:38,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 18:20:38,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:20:38,940 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:38,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:39,154 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:20:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1158996349, now seen corresponding path program 1 times [2022-11-25 18:20:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:20:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417320028] [2022-11-25 18:20:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:39,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:39,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:20:39,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:20:39,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 18:20:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:39,371 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:20:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:20:39,550 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-25 18:20:39,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:20:39,551 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-25 18:20:39,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 18:20:39,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 18:20:39,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 18:20:39,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 18:20:39,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-25 18:20:39,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-25 18:20:39,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 18:20:39,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 18:20:39,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-11-25 18:20:39,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-11-25 18:20:39,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-11-25 18:20:39,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 18:20:39,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 18:20:39,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-11-25 18:20:39,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2022-11-25 18:20:39,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 18:20:39,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (5 of 23 remaining) [2022-11-25 18:20:39,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 18:20:39,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 18:20:39,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-11-25 18:20:39,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 18:20:39,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 18:20:39,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:20:39,763 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:39,768 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:20:39,769 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:20:39,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:20:39 BasicIcfg [2022-11-25 18:20:39,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:20:39,809 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:20:39,810 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:20:39,810 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:20:39,815 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:17:06" (3/4) ... [2022-11-25 18:20:39,818 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 18:20:39,818 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:20:39,819 INFO L158 Benchmark]: Toolchain (without parser) took 214644.14ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 51.0MB in the beginning and 37.9MB in the end (delta: 13.1MB). Peak memory consumption was 47.5MB. Max. memory is 16.1GB. [2022-11-25 18:20:39,819 INFO L158 Benchmark]: CDTParser took 0.58ms. Allocated memory is still 54.5MB. Free memory is still 32.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:20:39,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 680.88ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 47.0MB in the end (delta: 3.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2022-11-25 18:20:39,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.07ms. Allocated memory is still 73.4MB. Free memory was 47.0MB in the beginning and 44.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:20:39,820 INFO L158 Benchmark]: Boogie Preprocessor took 65.22ms. Allocated memory is still 73.4MB. Free memory was 44.7MB in the beginning and 42.6MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:20:39,821 INFO L158 Benchmark]: RCFGBuilder took 779.53ms. Allocated memory is still 73.4MB. Free memory was 42.3MB in the beginning and 41.5MB in the end (delta: 847.1kB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2022-11-25 18:20:39,821 INFO L158 Benchmark]: TraceAbstraction took 213012.87ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 40.5MB in the beginning and 38.0MB in the end (delta: 2.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2022-11-25 18:20:39,821 INFO L158 Benchmark]: Witness Printer took 8.73ms. Allocated memory is still 107.0MB. Free memory was 38.0MB in the beginning and 37.9MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:20:39,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58ms. Allocated memory is still 54.5MB. Free memory is still 32.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 680.88ms. Allocated memory is still 73.4MB. Free memory was 50.8MB in the beginning and 47.0MB in the end (delta: 3.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.07ms. Allocated memory is still 73.4MB. Free memory was 47.0MB in the beginning and 44.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.22ms. Allocated memory is still 73.4MB. Free memory was 44.7MB in the beginning and 42.6MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 779.53ms. Allocated memory is still 73.4MB. Free memory was 42.3MB in the beginning and 41.5MB in the end (delta: 847.1kB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * TraceAbstraction took 213012.87ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 40.5MB in the beginning and 38.0MB in the end (delta: 2.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. * Witness Printer took 8.73ms. Allocated memory is still 107.0MB. Free memory was 38.0MB in the beginning and 37.9MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 188.1s, 155 PlacesBefore, 44 PlacesAfterwards, 158 TransitionsBefore, 45 TransitionsAfterwards, 5032 CoEnabledTransitionPairs, 8 FixpointIterations, 62 TrivialSequentialCompositions, 89 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 2 ChoiceCompositions, 174 TotalNumberOfCompositions, 11943 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7769, independent: 7496, independent conditional: 0, independent unconditional: 7496, dependent: 256, dependent conditional: 0, dependent unconditional: 256, unknown: 17, unknown conditional: 0, unknown unconditional: 17] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 3533, independent: 3474, independent conditional: 0, independent unconditional: 3474, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 3533, independent: 3412, independent conditional: 0, independent unconditional: 3412, dependent: 121, dependent conditional: 0, dependent unconditional: 121, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 121, independent: 62, independent conditional: 0, independent unconditional: 62, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 6, unknown conditional: 0, unknown unconditional: 6] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13799, independent: 443, independent conditional: 0, independent unconditional: 443, dependent: 763, dependent conditional: 0, dependent unconditional: 763, unknown: 12593, unknown conditional: 0, unknown unconditional: 12593] ], Cache Queries: [ total: 7769, independent: 4022, independent conditional: 0, independent unconditional: 4022, dependent: 203, dependent conditional: 0, dependent unconditional: 203, unknown: 3544, unknown conditional: 0, unknown unconditional: 3544] , Statistics on independence cache: Total cache size (in pairs): 305, Positive cache size: 283, Positive conditional cache size: 0, Positive unconditional cache size: 283, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 2, Unknown conditional cache size: 0, Unknown unconditional cache size: 2 - UnprovableResult [Line: 746]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 746. Possible FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={7:0}, id2={15:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={7:0}, id2={15:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=1, send=0] [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 230 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 212.8s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 14.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 188.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1759 SdHoareTripleChecker+Valid, 11.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1129 mSDsluCounter, 510 SdHoareTripleChecker+Invalid, 10.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 379 mSDsCounter, 162 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2740 IncrementalHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 162 mSolverCounterUnsat, 131 mSDtfsCounter, 2740 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=17, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 143 ConstructedInterpolants, 8 QuantifiedInterpolants, 1293 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1828 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 3/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 18:20:39,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afa34fc4-b0d1-483e-a6ef-c0eb441de6f1/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample