./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/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_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/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_f352f498-5dc8-48bd-87d1-ef7219016da4/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 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- 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 15:33:32,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:33:32,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:33:32,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:33:32,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:33:32,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:33:32,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:33:32,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:33:32,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:33:32,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:33:32,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:33:32,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:33:32,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:33:32,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:33:32,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:33:32,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:33:32,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:33:32,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:33:32,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:33:32,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:33:32,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:33:32,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:33:32,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:33:32,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:33:32,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:33:32,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:33:32,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:33:32,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:33:32,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:33:32,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:33:32,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:33:32,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:33:32,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:33:32,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:33:32,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:33:32,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:33:32,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:33:32,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:33:32,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:33:32,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:33:32,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:33:32,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 15:33:32,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:33:32,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:33:32,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:33:32,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:33:32,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:33:32,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:33:32,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:33:32,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:33:32,889 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:33:32,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:33:32,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:33:32,890 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 15:33:32,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:33:32,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:33:32,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:33:32,890 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 15:33:32,890 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 15:33:32,891 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 15:33:32,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:33:32,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 15:33:32,891 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:33:32,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:33:32,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:33:32,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:33:32,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:33:32,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:32,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:33:32,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:33:32,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:33:32,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:33:32,893 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:33:32,893 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:33:32,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:33:32,894 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_f352f498-5dc8-48bd-87d1-ef7219016da4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2022-11-25 15:33:33,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:33:33,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:33:33,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:33:33,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:33:33,222 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:33:33,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/queue.i [2022-11-25 15:33:36,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:33:36,445 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:33:36,446 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i [2022-11-25 15:33:36,475 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/data/4d9926f05/ab179e747f0d48b8aada91114a0da3d1/FLAG90dd0738d [2022-11-25 15:33:36,491 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/data/4d9926f05/ab179e747f0d48b8aada91114a0da3d1 [2022-11-25 15:33:36,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:33:36,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:33:36,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:36,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:33:36,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:33:36,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:36,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f26c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:36, skipping insertion in model container [2022-11-25 15:33:36,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:36" (1/1) ... [2022-11-25 15:33:36,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:33:36,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:33:37,169 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_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i[43284,43297] [2022-11-25 15:33:37,178 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_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i[43491,43504] [2022-11-25 15:33:37,183 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_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i[43772,43785] [2022-11-25 15:33:37,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:37,211 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:33:37,262 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_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i[43284,43297] [2022-11-25 15:33:37,264 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_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i[43491,43504] [2022-11-25 15:33:37,267 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_f352f498-5dc8-48bd-87d1-ef7219016da4/sv-benchmarks/c/pthread/queue.i[43772,43785] [2022-11-25 15:33:37,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:37,352 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:33:37,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37 WrapperNode [2022-11-25 15:33:37,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:37,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:37,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:33:37,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:33:37,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,461 INFO L138 Inliner]: procedures = 274, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 250 [2022-11-25 15:33:37,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:37,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:33:37,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:33:37,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:33:37,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:33:37,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:33:37,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:33:37,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:33:37,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (1/1) ... [2022-11-25 15:33:37,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:37,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:33:37,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:33:37,664 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 15:33:37,664 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 15:33:37,665 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 15:33:37,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 15:33:37,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:33:37,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:33:37,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:33:37,668 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 15:33:37,828 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:33:37,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:33:38,654 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:33:38,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:33:38,666 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:33:38,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:38 BoogieIcfgContainer [2022-11-25 15:33:38,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:33:38,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:33:38,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:33:38,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:33:38,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:33:36" (1/3) ... [2022-11-25 15:33:38,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c70cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:38, skipping insertion in model container [2022-11-25 15:33:38,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:37" (2/3) ... [2022-11-25 15:33:38,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c70cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:38, skipping insertion in model container [2022-11-25 15:33:38,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:38" (3/3) ... [2022-11-25 15:33:38,685 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2022-11-25 15:33:38,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:33:38,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-11-25 15:33:38,713 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:33:38,935 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:33:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 352 places, 360 transitions, 736 flow [2022-11-25 15:33:39,231 INFO L130 PetriNetUnfolder]: 15/358 cut-off events. [2022-11-25 15:33:39,231 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:33:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 358 events. 15/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 752 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 259. Up to 2 conditions per place. [2022-11-25 15:33:39,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 352 places, 360 transitions, 736 flow [2022-11-25 15:33:39,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 353 transitions, 718 flow [2022-11-25 15:33:39,259 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:33:39,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 353 transitions, 718 flow [2022-11-25 15:33:39,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 353 transitions, 718 flow [2022-11-25 15:33:39,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 353 transitions, 718 flow [2022-11-25 15:33:39,396 INFO L130 PetriNetUnfolder]: 15/353 cut-off events. [2022-11-25 15:33:39,396 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:33:39,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 353 events. 15/353 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 738 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 259. Up to 2 conditions per place. [2022-11-25 15:33:39,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-11-25 15:34:05,373 INFO L134 LiptonReduction]: Checked pairs total: 103016 [2022-11-25 15:34:05,373 INFO L136 LiptonReduction]: Total number of compositions: 589 [2022-11-25 15:34:05,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:34:05,399 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;@6516109a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:34:05,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-11-25 15:34:05,401 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 15:34:05,401 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:34:05,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:05,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 15:34:05,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1601, now seen corresponding path program 1 times [2022-11-25 15:34:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:05,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068899482] [2022-11-25 15:34:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:05,543 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 15:34:05,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068899482] [2022-11-25 15:34:05,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068899482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:05,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:05,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 15:34:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778124569] [2022-11-25 15:34:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:34:05,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:05,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:34:05,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:34:05,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 949 [2022-11-25 15:34:05,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 141 transitions, 294 flow. Second operand has 2 states, 2 states have (on average 347.5) internal successors, (695), 2 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 15:34:05,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:05,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 949 [2022-11-25 15:34:05,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:07,352 INFO L130 PetriNetUnfolder]: 7518/11889 cut-off events. [2022-11-25 15:34:07,352 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-25 15:34:07,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23346 conditions, 11889 events. 7518/11889 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 68513 event pairs, 6594 based on Foata normal form. 96/6102 useless extension candidates. Maximal degree in co-relation 22932. Up to 11346 conditions per place. [2022-11-25 15:34:07,439 INFO L137 encePairwiseOnDemand]: 900/949 looper letters, 83 selfloop transitions, 0 changer transitions 0/90 dead transitions. [2022-11-25 15:34:07,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 358 flow [2022-11-25 15:34:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:34:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 15:34:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 826 transitions. [2022-11-25 15:34:07,464 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351949420442571 [2022-11-25 15:34:07,465 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 826 transitions. [2022-11-25 15:34:07,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 826 transitions. [2022-11-25 15:34:07,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:07,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 826 transitions. [2022-11-25 15:34:07,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 413.0) internal successors, (826), 2 states have internal predecessors, (826), 0 states have call successors, (0), 0 states 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 15:34:07,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 949.0) internal successors, (2847), 3 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states 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 15:34:07,494 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 949.0) internal successors, (2847), 3 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states 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 15:34:07,496 INFO L175 Difference]: Start difference. First operand has 137 places, 141 transitions, 294 flow. Second operand 2 states and 826 transitions. [2022-11-25 15:34:07,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 358 flow [2022-11-25 15:34:07,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 350 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:07,508 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 184 flow [2022-11-25 15:34:07,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=184, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2022-11-25 15:34:07,514 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -51 predicate places. [2022-11-25 15:34:07,515 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 184 flow [2022-11-25 15:34:07,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 347.5) internal successors, (695), 2 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 15:34:07,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:07,517 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:34:07,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:34:07,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1610067, now seen corresponding path program 1 times [2022-11-25 15:34:07,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:07,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482931432] [2022-11-25 15:34:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:07,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482931432] [2022-11-25 15:34:07,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482931432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:07,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:07,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:07,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320462107] [2022-11-25 15:34:07,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:07,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:07,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:08,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 949 [2022-11-25 15:34:08,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 15:34:08,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:08,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 949 [2022-11-25 15:34:08,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:09,398 INFO L130 PetriNetUnfolder]: 6717/10628 cut-off events. [2022-11-25 15:34:09,399 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:34:09,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20782 conditions, 10628 events. 6717/10628 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 60108 event pairs, 5845 based on Foata normal form. 0/5615 useless extension candidates. Maximal degree in co-relation 20779. Up to 10111 conditions per place. [2022-11-25 15:34:09,459 INFO L137 encePairwiseOnDemand]: 943/949 looper letters, 77 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-11-25 15:34:09,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 86 transitions, 334 flow [2022-11-25 15:34:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1115 transitions. [2022-11-25 15:34:09,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39164032314717245 [2022-11-25 15:34:09,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1115 transitions. [2022-11-25 15:34:09,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1115 transitions. [2022-11-25 15:34:09,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:09,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1115 transitions. [2022-11-25 15:34:09,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 371.6666666666667) internal successors, (1115), 3 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states 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 15:34:09,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:09,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:09,476 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 184 flow. Second operand 3 states and 1115 transitions. [2022-11-25 15:34:09,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 86 transitions, 334 flow [2022-11-25 15:34:09,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:34:09,479 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 180 flow [2022-11-25 15:34:09,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2022-11-25 15:34:09,480 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -53 predicate places. [2022-11-25 15:34:09,481 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 180 flow [2022-11-25 15:34:09,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 15:34:09,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:09,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:34:09,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:34:09,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:09,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1610068, now seen corresponding path program 1 times [2022-11-25 15:34:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725304524] [2022-11-25 15:34:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:09,694 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 15:34:09,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:09,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725304524] [2022-11-25 15:34:09,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725304524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:09,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:09,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:09,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614393202] [2022-11-25 15:34:09,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:09,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:09,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:09,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 949 [2022-11-25 15:34:09,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 15:34:09,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:09,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 949 [2022-11-25 15:34:09,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:11,254 INFO L130 PetriNetUnfolder]: 5799/9186 cut-off events. [2022-11-25 15:34:11,255 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:34:11,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17929 conditions, 9186 events. 5799/9186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 50609 event pairs, 4991 based on Foata normal form. 0/5151 useless extension candidates. Maximal degree in co-relation 17925. Up to 8702 conditions per place. [2022-11-25 15:34:11,310 INFO L137 encePairwiseOnDemand]: 943/949 looper letters, 73 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2022-11-25 15:34:11,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 318 flow [2022-11-25 15:34:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1111 transitions. [2022-11-25 15:34:11,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3902353354408149 [2022-11-25 15:34:11,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1111 transitions. [2022-11-25 15:34:11,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1111 transitions. [2022-11-25 15:34:11,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:11,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1111 transitions. [2022-11-25 15:34:11,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.3333333333333) internal successors, (1111), 3 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 15:34:11,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:11,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:11,328 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 180 flow. Second operand 3 states and 1111 transitions. [2022-11-25 15:34:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 318 flow [2022-11-25 15:34:11,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:11,334 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 168 flow [2022-11-25 15:34:11,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2022-11-25 15:34:11,336 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -58 predicate places. [2022-11-25 15:34:11,336 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 168 flow [2022-11-25 15:34:11,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 15:34:11,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:11,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:34:11,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:34:11,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1609972, now seen corresponding path program 1 times [2022-11-25 15:34:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:11,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279786067] [2022-11-25 15:34:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:11,469 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 15:34:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279786067] [2022-11-25 15:34:11,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279786067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:11,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:11,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931028703] [2022-11-25 15:34:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:11,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:11,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 949 [2022-11-25 15:34:11,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 15:34:11,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:11,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 949 [2022-11-25 15:34:11,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:12,784 INFO L130 PetriNetUnfolder]: 5739/9066 cut-off events. [2022-11-25 15:34:12,785 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:34:12,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17694 conditions, 9066 events. 5739/9066 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 49675 event pairs, 4938 based on Foata normal form. 0/5109 useless extension candidates. Maximal degree in co-relation 17690. Up to 8587 conditions per place. [2022-11-25 15:34:12,835 INFO L137 encePairwiseOnDemand]: 945/949 looper letters, 70 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-11-25 15:34:12,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 308 flow [2022-11-25 15:34:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1100 transitions. [2022-11-25 15:34:12,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3863716192483316 [2022-11-25 15:34:12,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1100 transitions. [2022-11-25 15:34:12,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1100 transitions. [2022-11-25 15:34:12,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:12,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1100 transitions. [2022-11-25 15:34:12,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 15:34:12,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:12,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:12,853 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 168 flow. Second operand 3 states and 1100 transitions. [2022-11-25 15:34:12,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 308 flow [2022-11-25 15:34:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:12,856 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 167 flow [2022-11-25 15:34:12,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2022-11-25 15:34:12,857 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -59 predicate places. [2022-11-25 15:34:12,858 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 167 flow [2022-11-25 15:34:12,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 15:34:12,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:12,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 15:34:12,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:34:12,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1609974, now seen corresponding path program 1 times [2022-11-25 15:34:12,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:12,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801633809] [2022-11-25 15:34:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:12,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:12,909 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 15:34:12,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801633809] [2022-11-25 15:34:12,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801633809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:12,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:12,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664968533] [2022-11-25 15:34:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:12,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:13,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 949 [2022-11-25 15:34:13,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 167 flow. Second operand 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 15:34:13,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:13,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 949 [2022-11-25 15:34:13,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:14,406 INFO L130 PetriNetUnfolder]: 5679/8946 cut-off events. [2022-11-25 15:34:14,407 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:34:14,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17462 conditions, 8946 events. 5679/8946 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 48654 event pairs, 4885 based on Foata normal form. 0/5067 useless extension candidates. Maximal degree in co-relation 17458. Up to 8473 conditions per place. [2022-11-25 15:34:14,469 INFO L137 encePairwiseOnDemand]: 945/949 looper letters, 68 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2022-11-25 15:34:14,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 303 flow [2022-11-25 15:34:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1086 transitions. [2022-11-25 15:34:14,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3814541622760801 [2022-11-25 15:34:14,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1086 transitions. [2022-11-25 15:34:14,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1086 transitions. [2022-11-25 15:34:14,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:14,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1086 transitions. [2022-11-25 15:34:14,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states 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 15:34:14,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:14,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:14,492 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 167 flow. Second operand 3 states and 1086 transitions. [2022-11-25 15:34:14,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 303 flow [2022-11-25 15:34:14,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:14,498 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 163 flow [2022-11-25 15:34:14,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2022-11-25 15:34:14,502 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -61 predicate places. [2022-11-25 15:34:14,503 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 163 flow [2022-11-25 15:34:14,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 15:34:14,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:14,504 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:34:14,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:34:14,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 49911415, now seen corresponding path program 1 times [2022-11-25 15:34:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795276202] [2022-11-25 15:34:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:15,320 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 15:34:15,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795276202] [2022-11-25 15:34:15,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795276202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:15,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:15,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129972746] [2022-11-25 15:34:15,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:15,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:15,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:15,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 949 [2022-11-25 15:34:15,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 15:34:15,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:15,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 949 [2022-11-25 15:34:15,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:16,720 INFO L130 PetriNetUnfolder]: 5988/9338 cut-off events. [2022-11-25 15:34:16,720 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:34:16,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18332 conditions, 9338 events. 5988/9338 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 50037 event pairs, 4972 based on Foata normal form. 0/5133 useless extension candidates. Maximal degree in co-relation 18328. Up to 8947 conditions per place. [2022-11-25 15:34:16,785 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 73 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2022-11-25 15:34:16,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 327 flow [2022-11-25 15:34:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2022-11-25 15:34:16,790 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37407797681770283 [2022-11-25 15:34:16,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2022-11-25 15:34:16,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2022-11-25 15:34:16,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:16,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2022-11-25 15:34:16,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states 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 15:34:16,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:16,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:16,807 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 163 flow. Second operand 3 states and 1065 transitions. [2022-11-25 15:34:16,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 327 flow [2022-11-25 15:34:16,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:16,811 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 185 flow [2022-11-25 15:34:16,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2022-11-25 15:34:16,814 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -60 predicate places. [2022-11-25 15:34:16,814 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 185 flow [2022-11-25 15:34:16,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 15:34:16,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:16,815 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:34:16,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:34:16,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1547253327, now seen corresponding path program 1 times [2022-11-25 15:34:16,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:16,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757417521] [2022-11-25 15:34:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:17,432 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 15:34:17,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:17,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757417521] [2022-11-25 15:34:17,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757417521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:17,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:17,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:17,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740782388] [2022-11-25 15:34:17,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:34:17,771 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 949 [2022-11-25 15:34:17,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states 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 15:34:17,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:17,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 949 [2022-11-25 15:34:17,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:18,928 INFO L130 PetriNetUnfolder]: 6210/9679 cut-off events. [2022-11-25 15:34:18,929 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-11-25 15:34:18,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19369 conditions, 9679 events. 6210/9679 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 52898 event pairs, 1472 based on Foata normal form. 45/5458 useless extension candidates. Maximal degree in co-relation 19364. Up to 8957 conditions per place. [2022-11-25 15:34:18,991 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 89 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2022-11-25 15:34:18,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 420 flow [2022-11-25 15:34:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2022-11-25 15:34:18,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37864418686336493 [2022-11-25 15:34:18,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2022-11-25 15:34:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2022-11-25 15:34:18,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:18,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2022-11-25 15:34:19,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states 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 15:34:19,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:19,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:19,008 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 185 flow. Second operand 3 states and 1078 transitions. [2022-11-25 15:34:19,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 420 flow [2022-11-25 15:34:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:19,012 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 217 flow [2022-11-25 15:34:19,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2022-11-25 15:34:19,015 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -58 predicate places. [2022-11-25 15:34:19,015 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 217 flow [2022-11-25 15:34:19,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states 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 15:34:19,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:19,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:34:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 15:34:19,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1547256993, now seen corresponding path program 1 times [2022-11-25 15:34:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:19,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910865585] [2022-11-25 15:34:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:19,348 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 15:34:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910865585] [2022-11-25 15:34:19,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910865585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:19,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:19,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490144291] [2022-11-25 15:34:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:19,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:34:19,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 949 [2022-11-25 15:34:19,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 328.25) internal successors, (1313), 4 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 15:34:19,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:19,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 949 [2022-11-25 15:34:19,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:20,873 INFO L130 PetriNetUnfolder]: 5341/8446 cut-off events. [2022-11-25 15:34:20,873 INFO L131 PetriNetUnfolder]: For 628/628 co-relation queries the response was YES. [2022-11-25 15:34:20,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16977 conditions, 8446 events. 5341/8446 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 46376 event pairs, 1355 based on Foata normal form. 212/5314 useless extension candidates. Maximal degree in co-relation 16971. Up to 7298 conditions per place. [2022-11-25 15:34:20,926 INFO L137 encePairwiseOnDemand]: 942/949 looper letters, 93 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2022-11-25 15:34:20,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 447 flow [2022-11-25 15:34:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:34:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:34:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1405 transitions. [2022-11-25 15:34:20,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37012644889357216 [2022-11-25 15:34:20,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1405 transitions. [2022-11-25 15:34:20,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1405 transitions. [2022-11-25 15:34:20,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:20,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1405 transitions. [2022-11-25 15:34:20,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 351.25) internal successors, (1405), 4 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states 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 15:34:20,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 949.0) internal successors, (4745), 5 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states 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 15:34:20,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 949.0) internal successors, (4745), 5 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states 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 15:34:20,945 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 217 flow. Second operand 4 states and 1405 transitions. [2022-11-25 15:34:20,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 447 flow [2022-11-25 15:34:20,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:20,951 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 193 flow [2022-11-25 15:34:20,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2022-11-25 15:34:20,954 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -60 predicate places. [2022-11-25 15:34:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 193 flow [2022-11-25 15:34:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 328.25) internal successors, (1313), 4 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 15:34:20,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:20,956 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:34:20,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:34:20,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1547217034, now seen corresponding path program 1 times [2022-11-25 15:34:20,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:20,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778873349] [2022-11-25 15:34:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:20,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:21,040 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 15:34:21,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778873349] [2022-11-25 15:34:21,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778873349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:21,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:21,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:21,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621631152] [2022-11-25 15:34:21,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:21,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:34:21,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 949 [2022-11-25 15:34:21,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states 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 15:34:21,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:21,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 949 [2022-11-25 15:34:21,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:22,077 INFO L130 PetriNetUnfolder]: 3848/6214 cut-off events. [2022-11-25 15:34:22,077 INFO L131 PetriNetUnfolder]: For 521/521 co-relation queries the response was YES. [2022-11-25 15:34:22,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12521 conditions, 6214 events. 3848/6214 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 32996 event pairs, 3204 based on Foata normal form. 0/4025 useless extension candidates. Maximal degree in co-relation 12515. Up to 5856 conditions per place. [2022-11-25 15:34:22,116 INFO L137 encePairwiseOnDemand]: 946/949 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-25 15:34:22,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 325 flow [2022-11-25 15:34:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1068 transitions. [2022-11-25 15:34:22,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37513171759747105 [2022-11-25 15:34:22,122 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1068 transitions. [2022-11-25 15:34:22,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1068 transitions. [2022-11-25 15:34:22,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:22,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1068 transitions. [2022-11-25 15:34:22,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 15:34:22,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:22,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:22,155 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 193 flow. Second operand 3 states and 1068 transitions. [2022-11-25 15:34:22,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 325 flow [2022-11-25 15:34:22,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:22,158 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 191 flow [2022-11-25 15:34:22,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2022-11-25 15:34:22,159 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -61 predicate places. [2022-11-25 15:34:22,159 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 191 flow [2022-11-25 15:34:22,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states 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 15:34:22,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:22,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:34:22,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:34:22,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1547217035, now seen corresponding path program 1 times [2022-11-25 15:34:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:22,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101935066] [2022-11-25 15:34:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:22,349 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 15:34:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:22,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101935066] [2022-11-25 15:34:22,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101935066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:22,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:22,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:34:22,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521156850] [2022-11-25 15:34:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:34:22,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:34:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:34:22,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 949 [2022-11-25 15:34:22,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 341.25) internal successors, (1365), 4 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 15:34:22,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:22,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 949 [2022-11-25 15:34:22,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:23,218 INFO L130 PetriNetUnfolder]: 2378/3993 cut-off events. [2022-11-25 15:34:23,218 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-11-25 15:34:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8071 conditions, 3993 events. 2378/3993 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 20516 event pairs, 1935 based on Foata normal form. 0/2970 useless extension candidates. Maximal degree in co-relation 8065. Up to 3750 conditions per place. [2022-11-25 15:34:23,247 INFO L137 encePairwiseOnDemand]: 946/949 looper letters, 64 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2022-11-25 15:34:23,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 321 flow [2022-11-25 15:34:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2022-11-25 15:34:23,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3811029153494907 [2022-11-25 15:34:23,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2022-11-25 15:34:23,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2022-11-25 15:34:23,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:23,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2022-11-25 15:34:23,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states 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 15:34:23,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:23,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:23,268 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 191 flow. Second operand 3 states and 1085 transitions. [2022-11-25 15:34:23,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 321 flow [2022-11-25 15:34:23,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 317 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:23,272 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 189 flow [2022-11-25 15:34:23,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2022-11-25 15:34:23,273 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -62 predicate places. [2022-11-25 15:34:23,273 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 189 flow [2022-11-25 15:34:23,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 341.25) internal successors, (1365), 4 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states 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 15:34:23,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:23,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:23,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 15:34:23,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 816841384, now seen corresponding path program 1 times [2022-11-25 15:34:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:23,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423271073] [2022-11-25 15:34:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:23,353 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 15:34:23,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:23,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423271073] [2022-11-25 15:34:23,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423271073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:23,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:23,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74272081] [2022-11-25 15:34:23,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:23,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:23,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 949 [2022-11-25 15:34:23,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 15:34:23,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:23,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 949 [2022-11-25 15:34:23,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:23,937 INFO L130 PetriNetUnfolder]: 1643/2812 cut-off events. [2022-11-25 15:34:23,937 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-11-25 15:34:23,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 2812 events. 1643/2812 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 12215 event pairs, 840 based on Foata normal form. 60/2103 useless extension candidates. Maximal degree in co-relation 5644. Up to 1715 conditions per place. [2022-11-25 15:34:23,956 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 90 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2022-11-25 15:34:23,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 421 flow [2022-11-25 15:34:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1120 transitions. [2022-11-25 15:34:23,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39339655778011945 [2022-11-25 15:34:23,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1120 transitions. [2022-11-25 15:34:23,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1120 transitions. [2022-11-25 15:34:23,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:23,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1120 transitions. [2022-11-25 15:34:23,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 373.3333333333333) internal successors, (1120), 3 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states 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 15:34:23,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:23,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:23,974 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 189 flow. Second operand 3 states and 1120 transitions. [2022-11-25 15:34:23,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 421 flow [2022-11-25 15:34:23,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 407 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:23,979 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 177 flow [2022-11-25 15:34:23,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2022-11-25 15:34:23,980 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -64 predicate places. [2022-11-25 15:34:23,980 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 177 flow [2022-11-25 15:34:23,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 15:34:23,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:23,981 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 15:34:23,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -794981850, now seen corresponding path program 1 times [2022-11-25 15:34:23,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061034118] [2022-11-25 15:34:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:24,140 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 15:34:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:24,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061034118] [2022-11-25 15:34:24,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061034118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:24,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:24,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146823142] [2022-11-25 15:34:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:24,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:24,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 949 [2022-11-25 15:34:24,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states 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 15:34:24,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:24,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 949 [2022-11-25 15:34:24,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:24,761 INFO L130 PetriNetUnfolder]: 1480/2525 cut-off events. [2022-11-25 15:34:24,761 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-25 15:34:24,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5131 conditions, 2525 events. 1480/2525 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10648 event pairs, 1151 based on Foata normal form. 0/1864 useless extension candidates. Maximal degree in co-relation 5125. Up to 2371 conditions per place. [2022-11-25 15:34:24,775 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-11-25 15:34:24,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 293 flow [2022-11-25 15:34:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2022-11-25 15:34:24,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37829293993677554 [2022-11-25 15:34:24,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2022-11-25 15:34:24,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2022-11-25 15:34:24,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:24,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2022-11-25 15:34:24,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states 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 15:34:24,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:24,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:24,789 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 177 flow. Second operand 3 states and 1077 transitions. [2022-11-25 15:34:24,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 293 flow [2022-11-25 15:34:24,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:24,793 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 172 flow [2022-11-25 15:34:24,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-11-25 15:34:24,794 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -66 predicate places. [2022-11-25 15:34:24,795 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 172 flow [2022-11-25 15:34:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states 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 15:34:24,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:24,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:24,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 15:34:24,796 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash -794981851, now seen corresponding path program 1 times [2022-11-25 15:34:24,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:24,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242200386] [2022-11-25 15:34:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:24,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:24,970 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 15:34:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242200386] [2022-11-25 15:34:24,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242200386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:24,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:24,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:34:24,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726051736] [2022-11-25 15:34:24,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:24,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:24,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:24,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:24,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:25,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 949 [2022-11-25 15:34:25,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 172 flow. Second operand 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 15:34:25,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:25,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 949 [2022-11-25 15:34:25,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:25,540 INFO L130 PetriNetUnfolder]: 1463/2496 cut-off events. [2022-11-25 15:34:25,541 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-11-25 15:34:25,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5060 conditions, 2496 events. 1463/2496 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10502 event pairs, 1137 based on Foata normal form. 0/1851 useless extension candidates. Maximal degree in co-relation 5054. Up to 2344 conditions per place. [2022-11-25 15:34:25,553 INFO L137 encePairwiseOnDemand]: 947/949 looper letters, 59 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2022-11-25 15:34:25,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 290 flow [2022-11-25 15:34:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1095 transitions. [2022-11-25 15:34:25,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2022-11-25 15:34:25,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1095 transitions. [2022-11-25 15:34:25,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1095 transitions. [2022-11-25 15:34:25,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:25,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1095 transitions. [2022-11-25 15:34:25,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states 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 15:34:25,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:25,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:25,567 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 172 flow. Second operand 3 states and 1095 transitions. [2022-11-25 15:34:25,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 290 flow [2022-11-25 15:34:25,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:25,569 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 168 flow [2022-11-25 15:34:25,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2022-11-25 15:34:25,570 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -67 predicate places. [2022-11-25 15:34:25,570 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 168 flow [2022-11-25 15:34:25,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 15:34:25,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:25,571 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 15:34:25,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1125366119, now seen corresponding path program 1 times [2022-11-25 15:34:25,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:25,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640687615] [2022-11-25 15:34:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:25,621 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 15:34:25,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:25,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640687615] [2022-11-25 15:34:25,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640687615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:25,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:25,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:34:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461493002] [2022-11-25 15:34:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:25,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:34:25,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:34:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:34:25,632 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 949 [2022-11-25 15:34:25,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 15:34:25,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:25,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 949 [2022-11-25 15:34:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:26,049 INFO L130 PetriNetUnfolder]: 1451/2484 cut-off events. [2022-11-25 15:34:26,050 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-11-25 15:34:26,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5034 conditions, 2484 events. 1451/2484 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10487 event pairs, 1123 based on Foata normal form. 0/1851 useless extension candidates. Maximal degree in co-relation 5028. Up to 2292 conditions per place. [2022-11-25 15:34:26,060 INFO L137 encePairwiseOnDemand]: 945/949 looper letters, 64 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2022-11-25 15:34:26,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 319 flow [2022-11-25 15:34:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:34:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:34:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1093 transitions. [2022-11-25 15:34:26,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3839128907622058 [2022-11-25 15:34:26,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1093 transitions. [2022-11-25 15:34:26,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1093 transitions. [2022-11-25 15:34:26,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:26,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1093 transitions. [2022-11-25 15:34:26,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.3333333333333) internal successors, (1093), 3 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states 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 15:34:26,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:26,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:34:26,074 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 168 flow. Second operand 3 states and 1093 transitions. [2022-11-25 15:34:26,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 319 flow [2022-11-25 15:34:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:26,076 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 171 flow [2022-11-25 15:34:26,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2022-11-25 15:34:26,077 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -66 predicate places. [2022-11-25 15:34:26,077 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 171 flow [2022-11-25 15:34:26,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states 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 15:34:26,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:26,078 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:26,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 15:34:26,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash -853262954, now seen corresponding path program 1 times [2022-11-25 15:34:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929831534] [2022-11-25 15:34:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:26,937 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 15:34:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929831534] [2022-11-25 15:34:26,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929831534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:26,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:26,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:34:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197192869] [2022-11-25 15:34:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:34:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:34:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:34:27,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 949 [2022-11-25 15:34:27,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 325.4) internal successors, (1627), 5 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 15:34:27,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:27,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 949 [2022-11-25 15:34:27,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:27,838 INFO L130 PetriNetUnfolder]: 1549/2621 cut-off events. [2022-11-25 15:34:27,838 INFO L131 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-11-25 15:34:27,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5389 conditions, 2621 events. 1549/2621 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 10872 event pairs, 1213 based on Foata normal form. 0/1966 useless extension candidates. Maximal degree in co-relation 5383. Up to 2487 conditions per place. [2022-11-25 15:34:27,852 INFO L137 encePairwiseOnDemand]: 942/949 looper letters, 63 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2022-11-25 15:34:27,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 344 flow [2022-11-25 15:34:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:34:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:34:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2011 transitions. [2022-11-25 15:34:27,859 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.353178784685634 [2022-11-25 15:34:27,859 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2011 transitions. [2022-11-25 15:34:27,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2011 transitions. [2022-11-25 15:34:27,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:27,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2011 transitions. [2022-11-25 15:34:27,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 335.1666666666667) internal successors, (2011), 6 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states 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 15:34:27,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 949.0) internal successors, (6643), 7 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states 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 15:34:27,874 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 949.0) internal successors, (6643), 7 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states 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 15:34:27,874 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 171 flow. Second operand 6 states and 2011 transitions. [2022-11-25 15:34:27,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 344 flow [2022-11-25 15:34:27,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:27,877 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 221 flow [2022-11-25 15:34:27,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2022-11-25 15:34:27,878 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -60 predicate places. [2022-11-25 15:34:27,878 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 221 flow [2022-11-25 15:34:27,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 325.4) internal successors, (1627), 5 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states 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 15:34:27,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:27,879 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:27,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 15:34:27,880 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:27,880 INFO L85 PathProgramCache]: Analyzing trace with hash 637464766, now seen corresponding path program 1 times [2022-11-25 15:34:27,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:27,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854558856] [2022-11-25 15:34:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:27,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:28,635 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 15:34:28,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:28,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854558856] [2022-11-25 15:34:28,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854558856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:28,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:28,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 15:34:28,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524869831] [2022-11-25 15:34:28,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:28,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:34:28,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:28,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:34:28,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:34:29,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 949 [2022-11-25 15:34:29,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 305.85714285714283) internal successors, (2141), 7 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states 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 15:34:29,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:29,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 949 [2022-11-25 15:34:29,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:30,216 INFO L130 PetriNetUnfolder]: 1645/2783 cut-off events. [2022-11-25 15:34:30,216 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-11-25 15:34:30,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 2783 events. 1645/2783 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11666 event pairs, 443 based on Foata normal form. 11/2126 useless extension candidates. Maximal degree in co-relation 5810. Up to 2425 conditions per place. [2022-11-25 15:34:30,231 INFO L137 encePairwiseOnDemand]: 942/949 looper letters, 89 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2022-11-25 15:34:30,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 503 flow [2022-11-25 15:34:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:34:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:34:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1923 transitions. [2022-11-25 15:34:30,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3377239199157007 [2022-11-25 15:34:30,238 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1923 transitions. [2022-11-25 15:34:30,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1923 transitions. [2022-11-25 15:34:30,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:30,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1923 transitions. [2022-11-25 15:34:30,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states 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 15:34:30,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 949.0) internal successors, (6643), 7 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states 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 15:34:30,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 949.0) internal successors, (6643), 7 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states 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 15:34:30,253 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 221 flow. Second operand 6 states and 1923 transitions. [2022-11-25 15:34:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 503 flow [2022-11-25 15:34:30,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 495 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:30,257 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 267 flow [2022-11-25 15:34:30,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2022-11-25 15:34:30,258 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -54 predicate places. [2022-11-25 15:34:30,258 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 267 flow [2022-11-25 15:34:30,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 305.85714285714283) internal successors, (2141), 7 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states 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 15:34:30,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:30,260 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 15:34:30,260 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash -248333514, now seen corresponding path program 2 times [2022-11-25 15:34:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:30,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431678917] [2022-11-25 15:34:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:30,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:31,018 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 15:34:31,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:31,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431678917] [2022-11-25 15:34:31,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431678917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:31,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:31,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 15:34:31,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494605453] [2022-11-25 15:34:31,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:31,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:34:31,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:34:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:34:32,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 949 [2022-11-25 15:34:32,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 314.85714285714283) internal successors, (2204), 7 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 15:34:32,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:32,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 949 [2022-11-25 15:34:32,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:32,854 INFO L130 PetriNetUnfolder]: 1618/2745 cut-off events. [2022-11-25 15:34:32,854 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2022-11-25 15:34:32,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5845 conditions, 2745 events. 1618/2745 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11513 event pairs, 457 based on Foata normal form. 11/2092 useless extension candidates. Maximal degree in co-relation 5833. Up to 2247 conditions per place. [2022-11-25 15:34:32,866 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 81 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-11-25 15:34:32,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 96 transitions, 484 flow [2022-11-25 15:34:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:34:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:34:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1648 transitions. [2022-11-25 15:34:32,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34731296101159115 [2022-11-25 15:34:32,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1648 transitions. [2022-11-25 15:34:32,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1648 transitions. [2022-11-25 15:34:32,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:32,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1648 transitions. [2022-11-25 15:34:32,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 329.6) internal successors, (1648), 5 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states 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 15:34:32,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 949.0) internal successors, (5694), 6 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states 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 15:34:32,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 949.0) internal successors, (5694), 6 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states 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 15:34:32,886 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 267 flow. Second operand 5 states and 1648 transitions. [2022-11-25 15:34:32,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 96 transitions, 484 flow [2022-11-25 15:34:32,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 96 transitions, 474 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:34:32,890 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 267 flow [2022-11-25 15:34:32,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2022-11-25 15:34:32,891 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -52 predicate places. [2022-11-25 15:34:32,892 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 267 flow [2022-11-25 15:34:32,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 314.85714285714283) internal successors, (2204), 7 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 15:34:32,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:32,893 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:32,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 15:34:32,893 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:32,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:32,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1226727873, now seen corresponding path program 1 times [2022-11-25 15:34:32,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:32,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401620575] [2022-11-25 15:34:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:32,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:34,524 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 15:34:34,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:34,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401620575] [2022-11-25 15:34:34,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401620575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:34,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:34,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 15:34:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831966091] [2022-11-25 15:34:34,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:34,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:34:34,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:34:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:34:39,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 949 [2022-11-25 15:34:39,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 267 flow. Second operand has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states 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 15:34:39,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:39,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 949 [2022-11-25 15:34:39,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:40,865 INFO L130 PetriNetUnfolder]: 1617/2742 cut-off events. [2022-11-25 15:34:40,865 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2022-11-25 15:34:40,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2742 events. 1617/2742 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11423 event pairs, 1273 based on Foata normal form. 0/2079 useless extension candidates. Maximal degree in co-relation 5835. Up to 2598 conditions per place. [2022-11-25 15:34:40,875 INFO L137 encePairwiseOnDemand]: 938/949 looper letters, 71 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2022-11-25 15:34:40,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 490 flow [2022-11-25 15:34:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:34:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:34:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2821 transitions. [2022-11-25 15:34:40,888 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3302891933028919 [2022-11-25 15:34:40,888 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2821 transitions. [2022-11-25 15:34:40,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2821 transitions. [2022-11-25 15:34:40,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:40,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2821 transitions. [2022-11-25 15:34:40,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 313.44444444444446) internal successors, (2821), 9 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states 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 15:34:40,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:34:40,907 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:34:40,907 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 267 flow. Second operand 9 states and 2821 transitions. [2022-11-25 15:34:40,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 490 flow [2022-11-25 15:34:40,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 472 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:34:40,911 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 331 flow [2022-11-25 15:34:40,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2022-11-25 15:34:40,912 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -45 predicate places. [2022-11-25 15:34:40,912 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 331 flow [2022-11-25 15:34:40,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 305.3) internal successors, (3053), 10 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states 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 15:34:40,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:40,913 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 15:34:40,914 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2036158487, now seen corresponding path program 1 times [2022-11-25 15:34:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:40,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991956931] [2022-11-25 15:34:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:42,722 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 15:34:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991956931] [2022-11-25 15:34:42,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991956931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:42,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:42,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:34:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669680743] [2022-11-25 15:34:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:42,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:34:42,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:42,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:34:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:34:52,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 949 [2022-11-25 15:34:52,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 331 flow. Second operand has 11 states, 11 states have (on average 301.27272727272725) internal successors, (3314), 11 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 15:34:52,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:52,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 949 [2022-11-25 15:34:52,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:54,767 INFO L130 PetriNetUnfolder]: 1878/3191 cut-off events. [2022-11-25 15:34:54,768 INFO L131 PetriNetUnfolder]: For 381/381 co-relation queries the response was YES. [2022-11-25 15:34:54,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6934 conditions, 3191 events. 1878/3191 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13972 event pairs, 665 based on Foata normal form. 0/2431 useless extension candidates. Maximal degree in co-relation 6919. Up to 2363 conditions per place. [2022-11-25 15:34:54,778 INFO L137 encePairwiseOnDemand]: 938/949 looper letters, 120 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2022-11-25 15:34:54,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 780 flow [2022-11-25 15:34:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:34:54,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:34:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2835 transitions. [2022-11-25 15:34:54,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33192834562697576 [2022-11-25 15:34:54,784 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2835 transitions. [2022-11-25 15:34:54,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2835 transitions. [2022-11-25 15:34:54,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:54,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2835 transitions. [2022-11-25 15:34:54,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states 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 15:34:54,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:34:54,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:34:54,802 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 331 flow. Second operand 9 states and 2835 transitions. [2022-11-25 15:34:54,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 780 flow [2022-11-25 15:34:54,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 750 flow, removed 5 selfloop flow, removed 5 redundant places. [2022-11-25 15:34:54,808 INFO L231 Difference]: Finished difference. Result has 100 places, 88 transitions, 423 flow [2022-11-25 15:34:54,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2022-11-25 15:34:54,809 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -37 predicate places. [2022-11-25 15:34:54,809 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 423 flow [2022-11-25 15:34:54,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 301.27272727272725) internal successors, (3314), 11 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 15:34:54,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:54,810 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:54,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 15:34:54,810 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:34:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -975351985, now seen corresponding path program 2 times [2022-11-25 15:34:54,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:54,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709123180] [2022-11-25 15:34:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:56,152 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 15:34:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:56,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709123180] [2022-11-25 15:34:56,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709123180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:34:56,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:34:56,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:34:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981084766] [2022-11-25 15:34:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:34:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:34:56,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:34:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:34:59,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 949 [2022-11-25 15:34:59,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 88 transitions, 423 flow. Second operand has 11 states, 11 states have (on average 301.27272727272725) internal successors, (3314), 11 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 15:34:59,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:59,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 949 [2022-11-25 15:34:59,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:00,624 INFO L130 PetriNetUnfolder]: 1960/3346 cut-off events. [2022-11-25 15:35:00,624 INFO L131 PetriNetUnfolder]: For 848/848 co-relation queries the response was YES. [2022-11-25 15:35:00,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7623 conditions, 3346 events. 1960/3346 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 15079 event pairs, 515 based on Foata normal form. 0/2536 useless extension candidates. Maximal degree in co-relation 7603. Up to 2018 conditions per place. [2022-11-25 15:35:00,636 INFO L137 encePairwiseOnDemand]: 938/949 looper letters, 111 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2022-11-25 15:35:00,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 819 flow [2022-11-25 15:35:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:35:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:35:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2819 transitions. [2022-11-25 15:35:00,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3300550286851657 [2022-11-25 15:35:00,643 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2819 transitions. [2022-11-25 15:35:00,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2819 transitions. [2022-11-25 15:35:00,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:00,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2819 transitions. [2022-11-25 15:35:00,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 313.22222222222223) internal successors, (2819), 9 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states 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 15:35:00,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:35:00,661 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:35:00,661 INFO L175 Difference]: Start difference. First operand has 100 places, 88 transitions, 423 flow. Second operand 9 states and 2819 transitions. [2022-11-25 15:35:00,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 819 flow [2022-11-25 15:35:00,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 142 transitions, 787 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 15:35:00,669 INFO L231 Difference]: Finished difference. Result has 107 places, 91 transitions, 485 flow [2022-11-25 15:35:00,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=107, PETRI_TRANSITIONS=91} [2022-11-25 15:35:00,670 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -30 predicate places. [2022-11-25 15:35:00,670 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 485 flow [2022-11-25 15:35:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 301.27272727272725) internal successors, (3314), 11 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 15:35:00,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:00,671 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:00,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 15:35:00,672 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 626015093, now seen corresponding path program 3 times [2022-11-25 15:35:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344395916] [2022-11-25 15:35:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:00,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:01,772 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 15:35:01,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:01,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344395916] [2022-11-25 15:35:01,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344395916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:01,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:01,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:35:01,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66745101] [2022-11-25 15:35:01,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:01,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:35:01,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:01,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:35:01,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:35:04,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 949 [2022-11-25 15:35:04,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 91 transitions, 485 flow. Second operand has 11 states, 11 states have (on average 301.27272727272725) internal successors, (3314), 11 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 15:35:05,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:05,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 949 [2022-11-25 15:35:05,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:06,133 INFO L130 PetriNetUnfolder]: 1944/3308 cut-off events. [2022-11-25 15:35:06,134 INFO L131 PetriNetUnfolder]: For 1154/1154 co-relation queries the response was YES. [2022-11-25 15:35:06,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7703 conditions, 3308 events. 1944/3308 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14732 event pairs, 501 based on Foata normal form. 0/2513 useless extension candidates. Maximal degree in co-relation 7681. Up to 2020 conditions per place. [2022-11-25 15:35:06,148 INFO L137 encePairwiseOnDemand]: 939/949 looper letters, 110 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2022-11-25 15:35:06,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 857 flow [2022-11-25 15:35:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:35:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:35:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2517 transitions. [2022-11-25 15:35:06,154 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3315331928345627 [2022-11-25 15:35:06,154 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2517 transitions. [2022-11-25 15:35:06,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2517 transitions. [2022-11-25 15:35:06,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:06,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2517 transitions. [2022-11-25 15:35:06,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 314.625) internal successors, (2517), 8 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states 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 15:35:06,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 949.0) internal successors, (8541), 9 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states 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 15:35:06,169 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 949.0) internal successors, (8541), 9 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states 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 15:35:06,169 INFO L175 Difference]: Start difference. First operand has 107 places, 91 transitions, 485 flow. Second operand 8 states and 2517 transitions. [2022-11-25 15:35:06,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 857 flow [2022-11-25 15:35:06,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 140 transitions, 828 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 15:35:06,178 INFO L231 Difference]: Finished difference. Result has 107 places, 89 transitions, 498 flow [2022-11-25 15:35:06,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=498, PETRI_PLACES=107, PETRI_TRANSITIONS=89} [2022-11-25 15:35:06,179 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -30 predicate places. [2022-11-25 15:35:06,179 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 89 transitions, 498 flow [2022-11-25 15:35:06,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 301.27272727272725) internal successors, (3314), 11 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states 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 15:35:06,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:06,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:06,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 15:35:06,181 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2065474005, now seen corresponding path program 1 times [2022-11-25 15:35:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:06,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270981511] [2022-11-25 15:35:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:07,597 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 15:35:07,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270981511] [2022-11-25 15:35:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270981511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:07,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:07,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 15:35:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110703492] [2022-11-25 15:35:07,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:35:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:35:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:35:12,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 949 [2022-11-25 15:35:12,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 89 transitions, 498 flow. Second operand has 10 states, 10 states have (on average 294.6) internal successors, (2946), 10 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states 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 15:35:12,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:12,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 949 [2022-11-25 15:35:12,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:13,932 INFO L130 PetriNetUnfolder]: 2124/3620 cut-off events. [2022-11-25 15:35:13,932 INFO L131 PetriNetUnfolder]: For 1661/1661 co-relation queries the response was YES. [2022-11-25 15:35:13,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8573 conditions, 3620 events. 2124/3620 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 16641 event pairs, 1499 based on Foata normal form. 0/2760 useless extension candidates. Maximal degree in co-relation 8551. Up to 3169 conditions per place. [2022-11-25 15:35:13,948 INFO L137 encePairwiseOnDemand]: 939/949 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2022-11-25 15:35:13,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 129 transitions, 871 flow [2022-11-25 15:35:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:35:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:35:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3039 transitions. [2022-11-25 15:35:13,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.320231822971549 [2022-11-25 15:35:13,955 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3039 transitions. [2022-11-25 15:35:13,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3039 transitions. [2022-11-25 15:35:13,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:13,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3039 transitions. [2022-11-25 15:35:13,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 303.9) internal successors, (3039), 10 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states 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 15:35:13,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 949.0) internal successors, (10439), 11 states have internal predecessors, (10439), 0 states have call successors, (0), 0 states 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 15:35:13,972 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 949.0) internal successors, (10439), 11 states have internal predecessors, (10439), 0 states have call successors, (0), 0 states 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 15:35:13,972 INFO L175 Difference]: Start difference. First operand has 107 places, 89 transitions, 498 flow. Second operand 10 states and 3039 transitions. [2022-11-25 15:35:13,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 129 transitions, 871 flow [2022-11-25 15:35:13,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 129 transitions, 811 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-25 15:35:13,982 INFO L231 Difference]: Finished difference. Result has 112 places, 93 transitions, 536 flow [2022-11-25 15:35:13,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=536, PETRI_PLACES=112, PETRI_TRANSITIONS=93} [2022-11-25 15:35:13,983 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -25 predicate places. [2022-11-25 15:35:13,983 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 93 transitions, 536 flow [2022-11-25 15:35:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 294.6) internal successors, (2946), 10 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states 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 15:35:13,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:13,984 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 15:35:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 15:35:13,984 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1757808125, now seen corresponding path program 1 times [2022-11-25 15:35:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:13,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960196103] [2022-11-25 15:35:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:15,041 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 15:35:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960196103] [2022-11-25 15:35:15,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960196103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:15,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:15,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 15:35:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225850343] [2022-11-25 15:35:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:35:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:35:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:35:17,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 949 [2022-11-25 15:35:17,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 93 transitions, 536 flow. Second operand has 11 states, 11 states have (on average 292.54545454545456) internal successors, (3218), 11 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states 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 15:35:17,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:17,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 949 [2022-11-25 15:35:17,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:18,717 INFO L130 PetriNetUnfolder]: 2273/3880 cut-off events. [2022-11-25 15:35:18,717 INFO L131 PetriNetUnfolder]: For 1586/1586 co-relation queries the response was YES. [2022-11-25 15:35:18,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9169 conditions, 3880 events. 2273/3880 cut-off events. For 1586/1586 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 18354 event pairs, 633 based on Foata normal form. 22/3056 useless extension candidates. Maximal degree in co-relation 9144. Up to 2368 conditions per place. [2022-11-25 15:35:18,735 INFO L137 encePairwiseOnDemand]: 940/949 looper letters, 118 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2022-11-25 15:35:18,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 967 flow [2022-11-25 15:35:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:35:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:35:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2448 transitions. [2022-11-25 15:35:18,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3224446786090622 [2022-11-25 15:35:18,743 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2448 transitions. [2022-11-25 15:35:18,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2448 transitions. [2022-11-25 15:35:18,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:18,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2448 transitions. [2022-11-25 15:35:18,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 306.0) internal successors, (2448), 8 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 15:35:18,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 949.0) internal successors, (8541), 9 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states 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 15:35:18,756 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 949.0) internal successors, (8541), 9 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states 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 15:35:18,756 INFO L175 Difference]: Start difference. First operand has 112 places, 93 transitions, 536 flow. Second operand 8 states and 2448 transitions. [2022-11-25 15:35:18,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 967 flow [2022-11-25 15:35:18,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 938 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 15:35:18,768 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 603 flow [2022-11-25 15:35:18,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=603, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2022-11-25 15:35:18,768 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -22 predicate places. [2022-11-25 15:35:18,769 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 603 flow [2022-11-25 15:35:18,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 292.54545454545456) internal successors, (3218), 11 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states 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 15:35:18,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:18,770 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 15:35:18,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-25 15:35:18,770 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash 775051487, now seen corresponding path program 2 times [2022-11-25 15:35:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:18,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950579144] [2022-11-25 15:35:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:19,897 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 15:35:19,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950579144] [2022-11-25 15:35:19,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950579144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:19,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:19,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 15:35:19,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015307351] [2022-11-25 15:35:19,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:35:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:35:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:35:22,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 949 [2022-11-25 15:35:22,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 603 flow. Second operand has 11 states, 11 states have (on average 292.54545454545456) internal successors, (3218), 11 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states 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 15:35:22,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:22,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 949 [2022-11-25 15:35:22,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:23,797 INFO L130 PetriNetUnfolder]: 2257/3853 cut-off events. [2022-11-25 15:35:23,797 INFO L131 PetriNetUnfolder]: For 2528/2528 co-relation queries the response was YES. [2022-11-25 15:35:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9402 conditions, 3853 events. 2257/3853 cut-off events. For 2528/2528 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 18164 event pairs, 524 based on Foata normal form. 11/3022 useless extension candidates. Maximal degree in co-relation 9375. Up to 2040 conditions per place. [2022-11-25 15:35:23,815 INFO L137 encePairwiseOnDemand]: 940/949 looper letters, 114 selfloop transitions, 26 changer transitions 0/145 dead transitions. [2022-11-25 15:35:23,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 145 transitions, 991 flow [2022-11-25 15:35:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:35:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:35:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2735 transitions. [2022-11-25 15:35:23,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3202201147406627 [2022-11-25 15:35:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2735 transitions. [2022-11-25 15:35:23,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2735 transitions. [2022-11-25 15:35:23,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:23,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2735 transitions. [2022-11-25 15:35:23,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 303.8888888888889) internal successors, (2735), 9 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states 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 15:35:23,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:35:23,834 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 949.0) internal successors, (9490), 10 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states 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 15:35:23,834 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 603 flow. Second operand 9 states and 2735 transitions. [2022-11-25 15:35:23,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 145 transitions, 991 flow [2022-11-25 15:35:23,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 145 transitions, 953 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-25 15:35:23,850 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 630 flow [2022-11-25 15:35:23,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2022-11-25 15:35:23,851 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -18 predicate places. [2022-11-25 15:35:23,851 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 630 flow [2022-11-25 15:35:23,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 292.54545454545456) internal successors, (3218), 11 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states 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 15:35:23,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:23,852 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:23,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 15:35:23,852 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2005566829, now seen corresponding path program 1 times [2022-11-25 15:35:23,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:23,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674541684] [2022-11-25 15:35:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:23,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:25,084 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 15:35:25,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:25,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674541684] [2022-11-25 15:35:25,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674541684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:25,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:25,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 15:35:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067379523] [2022-11-25 15:35:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:25,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:35:25,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:35:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:35:26,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 949 [2022-11-25 15:35:26,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 306.8333333333333) internal successors, (3682), 12 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states 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 15:35:26,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:26,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 949 [2022-11-25 15:35:26,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:28,338 INFO L130 PetriNetUnfolder]: 2372/4049 cut-off events. [2022-11-25 15:35:28,339 INFO L131 PetriNetUnfolder]: For 3382/3382 co-relation queries the response was YES. [2022-11-25 15:35:28,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9943 conditions, 4049 events. 2372/4049 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 19279 event pairs, 1623 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 9915. Up to 3405 conditions per place. [2022-11-25 15:35:28,369 INFO L137 encePairwiseOnDemand]: 934/949 looper letters, 143 selfloop transitions, 31 changer transitions 0/179 dead transitions. [2022-11-25 15:35:28,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 179 transitions, 1210 flow [2022-11-25 15:35:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:35:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:35:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4731 transitions. [2022-11-25 15:35:28,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33234984193888306 [2022-11-25 15:35:28,377 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4731 transitions. [2022-11-25 15:35:28,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4731 transitions. [2022-11-25 15:35:28,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:28,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4731 transitions. [2022-11-25 15:35:28,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 315.4) internal successors, (4731), 15 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states 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 15:35:28,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 949.0) internal successors, (15184), 16 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states 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 15:35:28,399 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 949.0) internal successors, (15184), 16 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states 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 15:35:28,399 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 630 flow. Second operand 15 states and 4731 transitions. [2022-11-25 15:35:28,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 179 transitions, 1210 flow [2022-11-25 15:35:28,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 179 transitions, 1168 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 15:35:28,416 INFO L231 Difference]: Finished difference. Result has 134 places, 110 transitions, 772 flow [2022-11-25 15:35:28,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=772, PETRI_PLACES=134, PETRI_TRANSITIONS=110} [2022-11-25 15:35:28,416 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -3 predicate places. [2022-11-25 15:35:28,417 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 110 transitions, 772 flow [2022-11-25 15:35:28,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 306.8333333333333) internal successors, (3682), 12 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states 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 15:35:28,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:28,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:28,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 15:35:28,418 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:28,418 INFO L85 PathProgramCache]: Analyzing trace with hash -108863675, now seen corresponding path program 1 times [2022-11-25 15:35:28,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:28,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560574179] [2022-11-25 15:35:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:28,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,623 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 15:35:28,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:28,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560574179] [2022-11-25 15:35:28,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560574179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:28,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:28,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:35:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159153804] [2022-11-25 15:35:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:28,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:35:28,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:35:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:35:28,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 949 [2022-11-25 15:35:28,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 110 transitions, 772 flow. Second operand has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 15:35:28,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:28,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 949 [2022-11-25 15:35:28,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:29,708 INFO L130 PetriNetUnfolder]: 2863/4992 cut-off events. [2022-11-25 15:35:29,708 INFO L131 PetriNetUnfolder]: For 3648/3671 co-relation queries the response was YES. [2022-11-25 15:35:29,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12697 conditions, 4992 events. 2863/4992 cut-off events. For 3648/3671 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 26286 event pairs, 1336 based on Foata normal form. 23/4057 useless extension candidates. Maximal degree in co-relation 12662. Up to 3760 conditions per place. [2022-11-25 15:35:29,760 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 139 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-25 15:35:29,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 156 transitions, 1243 flow [2022-11-25 15:35:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:35:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 15:35:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1444 transitions. [2022-11-25 15:35:29,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3804004214963119 [2022-11-25 15:35:29,763 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1444 transitions. [2022-11-25 15:35:29,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1444 transitions. [2022-11-25 15:35:29,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:29,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1444 transitions. [2022-11-25 15:35:29,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 15:35:29,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 949.0) internal successors, (4745), 5 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states 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 15:35:29,770 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 949.0) internal successors, (4745), 5 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states 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 15:35:29,770 INFO L175 Difference]: Start difference. First operand has 134 places, 110 transitions, 772 flow. Second operand 4 states and 1444 transitions. [2022-11-25 15:35:29,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 156 transitions, 1243 flow [2022-11-25 15:35:29,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 156 transitions, 1195 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-11-25 15:35:29,795 INFO L231 Difference]: Finished difference. Result has 132 places, 111 transitions, 752 flow [2022-11-25 15:35:29,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=752, PETRI_PLACES=132, PETRI_TRANSITIONS=111} [2022-11-25 15:35:29,796 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -5 predicate places. [2022-11-25 15:35:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 111 transitions, 752 flow [2022-11-25 15:35:29,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 343.25) internal successors, (1373), 4 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states 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 15:35:29,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:29,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 15:35:29,798 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash -889243534, now seen corresponding path program 1 times [2022-11-25 15:35:29,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:29,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076806714] [2022-11-25 15:35:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:29,853 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 15:35:29,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076806714] [2022-11-25 15:35:29,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076806714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:29,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:29,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:35:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810143851] [2022-11-25 15:35:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:29,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:35:29,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:35:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:35:29,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 949 [2022-11-25 15:35:29,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 111 transitions, 752 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 15:35:29,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:29,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 949 [2022-11-25 15:35:29,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:30,448 INFO L130 PetriNetUnfolder]: 2022/3558 cut-off events. [2022-11-25 15:35:30,448 INFO L131 PetriNetUnfolder]: For 3014/3037 co-relation queries the response was YES. [2022-11-25 15:35:30,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9366 conditions, 3558 events. 2022/3558 cut-off events. For 3014/3037 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17414 event pairs, 1004 based on Foata normal form. 168/3063 useless extension candidates. Maximal degree in co-relation 9329. Up to 1925 conditions per place. [2022-11-25 15:35:30,485 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 114 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2022-11-25 15:35:30,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 128 transitions, 1046 flow [2022-11-25 15:35:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:35:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:35:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1098 transitions. [2022-11-25 15:35:30,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3856691253951528 [2022-11-25 15:35:30,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1098 transitions. [2022-11-25 15:35:30,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1098 transitions. [2022-11-25 15:35:30,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:30,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1098 transitions. [2022-11-25 15:35:30,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states 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 15:35:30,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:35:30,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:35:30,493 INFO L175 Difference]: Start difference. First operand has 132 places, 111 transitions, 752 flow. Second operand 3 states and 1098 transitions. [2022-11-25 15:35:30,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 128 transitions, 1046 flow [2022-11-25 15:35:30,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 128 transitions, 1038 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 15:35:30,512 INFO L231 Difference]: Finished difference. Result has 133 places, 111 transitions, 763 flow [2022-11-25 15:35:30,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=763, PETRI_PLACES=133, PETRI_TRANSITIONS=111} [2022-11-25 15:35:30,512 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -4 predicate places. [2022-11-25 15:35:30,513 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 111 transitions, 763 flow [2022-11-25 15:35:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 15:35:30,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:30,513 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 15:35:30,514 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash 118083463, now seen corresponding path program 1 times [2022-11-25 15:35:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:30,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826334359] [2022-11-25 15:35:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:30,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826334359] [2022-11-25 15:35:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826334359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:30,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:30,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:35:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760679483] [2022-11-25 15:35:30,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:30,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:35:30,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:35:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:35:30,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 949 [2022-11-25 15:35:30,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 111 transitions, 763 flow. Second operand has 3 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 15:35:30,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:30,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 949 [2022-11-25 15:35:30,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:31,498 INFO L130 PetriNetUnfolder]: 3099/5389 cut-off events. [2022-11-25 15:35:31,498 INFO L131 PetriNetUnfolder]: For 5280/5327 co-relation queries the response was YES. [2022-11-25 15:35:31,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14309 conditions, 5389 events. 3099/5389 cut-off events. For 5280/5327 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 29665 event pairs, 1482 based on Foata normal form. 43/4674 useless extension candidates. Maximal degree in co-relation 14271. Up to 3324 conditions per place. [2022-11-25 15:35:31,554 INFO L137 encePairwiseOnDemand]: 946/949 looper letters, 164 selfloop transitions, 2 changer transitions 0/179 dead transitions. [2022-11-25 15:35:31,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 1460 flow [2022-11-25 15:35:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:35:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:35:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-11-25 15:35:31,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3976115208991921 [2022-11-25 15:35:31,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-11-25 15:35:31,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-11-25 15:35:31,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:31,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-11-25 15:35:31,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states 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 15:35:31,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:35:31,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:35:31,563 INFO L175 Difference]: Start difference. First operand has 133 places, 111 transitions, 763 flow. Second operand 3 states and 1132 transitions. [2022-11-25 15:35:31,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 1460 flow [2022-11-25 15:35:31,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 179 transitions, 1452 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:35:31,591 INFO L231 Difference]: Finished difference. Result has 134 places, 112 transitions, 769 flow [2022-11-25 15:35:31,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=134, PETRI_TRANSITIONS=112} [2022-11-25 15:35:31,596 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, -3 predicate places. [2022-11-25 15:35:31,596 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 112 transitions, 769 flow [2022-11-25 15:35:31,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 15:35:31,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:31,597 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 15:35:31,597 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash -506705002, now seen corresponding path program 1 times [2022-11-25 15:35:31,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:31,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979472062] [2022-11-25 15:35:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:31,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:31,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:31,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979472062] [2022-11-25 15:35:31,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979472062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789878129] [2022-11-25 15:35:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:31,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:31,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:35:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:31,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:35:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:31,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:32,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789878129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:32,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:32,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 15:35:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232935471] [2022-11-25 15:35:32,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:32,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:35:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:35:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:35:32,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 949 [2022-11-25 15:35:32,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 112 transitions, 769 flow. Second operand has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states 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 15:35:32,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:32,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 949 [2022-11-25 15:35:32,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:33,791 INFO L130 PetriNetUnfolder]: 6151/10245 cut-off events. [2022-11-25 15:35:33,791 INFO L131 PetriNetUnfolder]: For 11880/11969 co-relation queries the response was YES. [2022-11-25 15:35:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27981 conditions, 10245 events. 6151/10245 cut-off events. For 11880/11969 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 62529 event pairs, 710 based on Foata normal form. 733/9644 useless extension candidates. Maximal degree in co-relation 27942. Up to 2502 conditions per place. [2022-11-25 15:35:33,916 INFO L137 encePairwiseOnDemand]: 944/949 looper letters, 346 selfloop transitions, 7 changer transitions 0/366 dead transitions. [2022-11-25 15:35:33,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 366 transitions, 2890 flow [2022-11-25 15:35:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:35:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:35:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2281 transitions. [2022-11-25 15:35:33,920 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40059711977520196 [2022-11-25 15:35:33,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2281 transitions. [2022-11-25 15:35:33,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2281 transitions. [2022-11-25 15:35:33,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:33,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2281 transitions. [2022-11-25 15:35:33,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 380.1666666666667) internal successors, (2281), 6 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states 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 15:35:33,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 949.0) internal successors, (6643), 7 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states 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 15:35:33,929 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 949.0) internal successors, (6643), 7 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states 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 15:35:33,930 INFO L175 Difference]: Start difference. First operand has 134 places, 112 transitions, 769 flow. Second operand 6 states and 2281 transitions. [2022-11-25 15:35:33,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 366 transitions, 2890 flow [2022-11-25 15:35:33,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 366 transitions, 2888 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:35:33,961 INFO L231 Difference]: Finished difference. Result has 142 places, 116 transitions, 815 flow [2022-11-25 15:35:33,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=815, PETRI_PLACES=142, PETRI_TRANSITIONS=116} [2022-11-25 15:35:33,962 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 5 predicate places. [2022-11-25 15:35:33,962 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 116 transitions, 815 flow [2022-11-25 15:35:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states 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 15:35:33,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:33,963 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:33,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:34,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f352f498-5dc8-48bd-87d1-ef7219016da4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 15:35:34,170 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1216794522, now seen corresponding path program 1 times [2022-11-25 15:35:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625111143] [2022-11-25 15:35:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:34,300 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 15:35:34,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:34,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625111143] [2022-11-25 15:35:34,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625111143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:34,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:34,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:35:34,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220165016] [2022-11-25 15:35:34,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:34,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:35:34,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:35:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:35:34,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 949 [2022-11-25 15:35:34,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 116 transitions, 815 flow. Second operand has 3 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 15:35:34,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:34,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 949 [2022-11-25 15:35:34,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:35,165 INFO L130 PetriNetUnfolder]: 3083/5844 cut-off events. [2022-11-25 15:35:35,166 INFO L131 PetriNetUnfolder]: For 7909/7912 co-relation queries the response was YES. [2022-11-25 15:35:35,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17880 conditions, 5844 events. 3083/5844 cut-off events. For 7909/7912 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 34681 event pairs, 730 based on Foata normal form. 1159/6390 useless extension candidates. Maximal degree in co-relation 17838. Up to 4395 conditions per place. [2022-11-25 15:35:35,204 INFO L137 encePairwiseOnDemand]: 941/949 looper letters, 102 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2022-11-25 15:35:35,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 128 transitions, 1113 flow [2022-11-25 15:35:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:35:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:35:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1087 transitions. [2022-11-25 15:35:35,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3818054092026695 [2022-11-25 15:35:35,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1087 transitions. [2022-11-25 15:35:35,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1087 transitions. [2022-11-25 15:35:35,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:35,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1087 transitions. [2022-11-25 15:35:35,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.3333333333333) internal successors, (1087), 3 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 15:35:35,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:35:35,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 949.0) internal successors, (3796), 4 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states 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 15:35:35,211 INFO L175 Difference]: Start difference. First operand has 142 places, 116 transitions, 815 flow. Second operand 3 states and 1087 transitions. [2022-11-25 15:35:35,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 128 transitions, 1113 flow [2022-11-25 15:35:35,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 128 transitions, 1104 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 15:35:35,237 INFO L231 Difference]: Finished difference. Result has 143 places, 116 transitions, 835 flow [2022-11-25 15:35:35,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=835, PETRI_PLACES=143, PETRI_TRANSITIONS=116} [2022-11-25 15:35:35,238 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 6 predicate places. [2022-11-25 15:35:35,238 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 116 transitions, 835 flow [2022-11-25 15:35:35,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.3333333333333) internal successors, (1042), 3 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 15:35:35,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:35,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:35,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 15:35:35,239 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1816160133, now seen corresponding path program 1 times [2022-11-25 15:35:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381336981] [2022-11-25 15:35:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:35,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,158 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 15:35:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:37,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381336981] [2022-11-25 15:35:37,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381336981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:37,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:37,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 15:35:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495399203] [2022-11-25 15:35:37,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:37,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:35:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:35:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:35:51,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 949 [2022-11-25 15:35:51,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 116 transitions, 835 flow. Second operand has 14 states, 14 states have (on average 300.92857142857144) internal successors, (4213), 14 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states 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 15:35:51,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:51,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 949 [2022-11-25 15:35:51,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:54,724 INFO L130 PetriNetUnfolder]: 3080/5906 cut-off events. [2022-11-25 15:35:54,724 INFO L131 PetriNetUnfolder]: For 7137/7137 co-relation queries the response was YES. [2022-11-25 15:35:54,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19135 conditions, 5906 events. 3080/5906 cut-off events. For 7137/7137 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 35191 event pairs, 1849 based on Foata normal form. 15/5309 useless extension candidates. Maximal degree in co-relation 19092. Up to 3867 conditions per place. [2022-11-25 15:35:54,762 INFO L137 encePairwiseOnDemand]: 933/949 looper letters, 153 selfloop transitions, 46 changer transitions 4/207 dead transitions. [2022-11-25 15:35:54,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 207 transitions, 1727 flow [2022-11-25 15:35:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:35:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:35:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4941 transitions. [2022-11-25 15:35:54,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3254083245521602 [2022-11-25 15:35:54,769 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4941 transitions. [2022-11-25 15:35:54,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4941 transitions. [2022-11-25 15:35:54,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:54,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4941 transitions. [2022-11-25 15:35:54,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 308.8125) internal successors, (4941), 16 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states 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 15:35:54,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 949.0) internal successors, (16133), 17 states have internal predecessors, (16133), 0 states have call successors, (0), 0 states 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 15:35:54,913 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 949.0) internal successors, (16133), 17 states have internal predecessors, (16133), 0 states have call successors, (0), 0 states 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 15:35:54,913 INFO L175 Difference]: Start difference. First operand has 143 places, 116 transitions, 835 flow. Second operand 16 states and 4941 transitions. [2022-11-25 15:35:54,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 207 transitions, 1727 flow [2022-11-25 15:35:54,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 207 transitions, 1693 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:35:54,943 INFO L231 Difference]: Finished difference. Result has 163 places, 123 transitions, 999 flow [2022-11-25 15:35:54,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=999, PETRI_PLACES=163, PETRI_TRANSITIONS=123} [2022-11-25 15:35:54,944 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 26 predicate places. [2022-11-25 15:35:54,944 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 123 transitions, 999 flow [2022-11-25 15:35:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 300.92857142857144) internal successors, (4213), 14 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states 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 15:35:54,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:54,945 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 15:35:54,946 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:35:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -558863719, now seen corresponding path program 2 times [2022-11-25 15:35:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065804724] [2022-11-25 15:35:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:56,401 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 15:35:56,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065804724] [2022-11-25 15:35:56,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065804724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:56,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:56,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 15:35:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870121511] [2022-11-25 15:35:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:56,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:35:56,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:56,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:35:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:36:00,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 949 [2022-11-25 15:36:00,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 123 transitions, 999 flow. Second operand has 14 states, 14 states have (on average 300.92857142857144) internal successors, (4213), 14 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states 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 15:36:00,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:00,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 949 [2022-11-25 15:36:00,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:01,768 INFO L130 PetriNetUnfolder]: 3171/6074 cut-off events. [2022-11-25 15:36:01,769 INFO L131 PetriNetUnfolder]: For 8081/8081 co-relation queries the response was YES. [2022-11-25 15:36:01,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19358 conditions, 6074 events. 3171/6074 cut-off events. For 8081/8081 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 36425 event pairs, 1724 based on Foata normal form. 15/5477 useless extension candidates. Maximal degree in co-relation 19308. Up to 3287 conditions per place. [2022-11-25 15:36:01,807 INFO L137 encePairwiseOnDemand]: 934/949 looper letters, 147 selfloop transitions, 50 changer transitions 4/205 dead transitions. [2022-11-25 15:36:01,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 205 transitions, 1841 flow [2022-11-25 15:36:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:36:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:36:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4328 transitions. [2022-11-25 15:36:01,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32575643534547644 [2022-11-25 15:36:01,813 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4328 transitions. [2022-11-25 15:36:01,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4328 transitions. [2022-11-25 15:36:01,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:01,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4328 transitions. [2022-11-25 15:36:01,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 309.14285714285717) internal successors, (4328), 14 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states 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 15:36:01,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 949.0) internal successors, (14235), 15 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states 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 15:36:01,832 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 949.0) internal successors, (14235), 15 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states 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 15:36:01,832 INFO L175 Difference]: Start difference. First operand has 163 places, 123 transitions, 999 flow. Second operand 14 states and 4328 transitions. [2022-11-25 15:36:01,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 205 transitions, 1841 flow [2022-11-25 15:36:01,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 205 transitions, 1766 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-11-25 15:36:01,871 INFO L231 Difference]: Finished difference. Result has 172 places, 129 transitions, 1122 flow [2022-11-25 15:36:01,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1122, PETRI_PLACES=172, PETRI_TRANSITIONS=129} [2022-11-25 15:36:01,872 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 35 predicate places. [2022-11-25 15:36:01,872 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 129 transitions, 1122 flow [2022-11-25 15:36:01,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 300.92857142857144) internal successors, (4213), 14 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states 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 15:36:01,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:01,873 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 15:36:01,874 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:36:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1928263187, now seen corresponding path program 3 times [2022-11-25 15:36:01,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:01,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242981806] [2022-11-25 15:36:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:03,196 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 15:36:03,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:03,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242981806] [2022-11-25 15:36:03,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242981806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:03,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:03,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 15:36:03,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511560078] [2022-11-25 15:36:03,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:03,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:36:03,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:03,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:36:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:36:07,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 949 [2022-11-25 15:36:07,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 129 transitions, 1122 flow. Second operand has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states 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 15:36:07,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:07,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 949 [2022-11-25 15:36:07,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:08,823 INFO L130 PetriNetUnfolder]: 3750/7158 cut-off events. [2022-11-25 15:36:08,823 INFO L131 PetriNetUnfolder]: For 10234/10234 co-relation queries the response was YES. [2022-11-25 15:36:08,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22825 conditions, 7158 events. 3750/7158 cut-off events. For 10234/10234 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 44359 event pairs, 1135 based on Foata normal form. 15/6391 useless extension candidates. Maximal degree in co-relation 22771. Up to 3102 conditions per place. [2022-11-25 15:36:08,882 INFO L137 encePairwiseOnDemand]: 930/949 looper letters, 158 selfloop transitions, 59 changer transitions 2/223 dead transitions. [2022-11-25 15:36:08,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 223 transitions, 2045 flow [2022-11-25 15:36:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:36:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:36:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4654 transitions. [2022-11-25 15:36:08,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3269406392694064 [2022-11-25 15:36:08,887 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4654 transitions. [2022-11-25 15:36:08,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4654 transitions. [2022-11-25 15:36:08,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:08,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4654 transitions. [2022-11-25 15:36:08,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 310.26666666666665) internal successors, (4654), 15 states have internal predecessors, (4654), 0 states have call successors, (0), 0 states 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 15:36:08,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 949.0) internal successors, (15184), 16 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states 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 15:36:08,908 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 949.0) internal successors, (15184), 16 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states 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 15:36:08,909 INFO L175 Difference]: Start difference. First operand has 172 places, 129 transitions, 1122 flow. Second operand 15 states and 4654 transitions. [2022-11-25 15:36:08,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 223 transitions, 2045 flow [2022-11-25 15:36:08,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 223 transitions, 1956 flow, removed 17 selfloop flow, removed 7 redundant places. [2022-11-25 15:36:08,964 INFO L231 Difference]: Finished difference. Result has 183 places, 139 transitions, 1292 flow [2022-11-25 15:36:08,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1292, PETRI_PLACES=183, PETRI_TRANSITIONS=139} [2022-11-25 15:36:08,965 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 46 predicate places. [2022-11-25 15:36:08,965 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 139 transitions, 1292 flow [2022-11-25 15:36:08,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states 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 15:36:08,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:08,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-25 15:36:08,967 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:36:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1326535149, now seen corresponding path program 4 times [2022-11-25 15:36:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199135945] [2022-11-25 15:36:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:11,032 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 15:36:11,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199135945] [2022-11-25 15:36:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199135945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:11,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:36:11,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 15:36:11,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785267216] [2022-11-25 15:36:11,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:11,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:36:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:36:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:36:17,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 949 [2022-11-25 15:36:17,681 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 139 transitions, 1292 flow. Second operand has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states 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 15:36:17,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:17,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 949 [2022-11-25 15:36:17,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:20,537 INFO L130 PetriNetUnfolder]: 3770/7198 cut-off events. [2022-11-25 15:36:20,537 INFO L131 PetriNetUnfolder]: For 11933/11933 co-relation queries the response was YES. [2022-11-25 15:36:20,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23761 conditions, 7198 events. 3770/7198 cut-off events. For 11933/11933 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 44672 event pairs, 1136 based on Foata normal form. 5/6501 useless extension candidates. Maximal degree in co-relation 23703. Up to 3085 conditions per place. [2022-11-25 15:36:20,593 INFO L137 encePairwiseOnDemand]: 930/949 looper letters, 162 selfloop transitions, 63 changer transitions 2/231 dead transitions. [2022-11-25 15:36:20,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 231 transitions, 2221 flow [2022-11-25 15:36:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:36:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:36:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4657 transitions. [2022-11-25 15:36:20,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32715138742536004 [2022-11-25 15:36:20,597 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4657 transitions. [2022-11-25 15:36:20,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4657 transitions. [2022-11-25 15:36:20,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:20,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4657 transitions. [2022-11-25 15:36:20,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 310.46666666666664) internal successors, (4657), 15 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states 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 15:36:20,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 949.0) internal successors, (15184), 16 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states 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 15:36:20,617 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 949.0) internal successors, (15184), 16 states have internal predecessors, (15184), 0 states have call successors, (0), 0 states 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 15:36:20,617 INFO L175 Difference]: Start difference. First operand has 183 places, 139 transitions, 1292 flow. Second operand 15 states and 4657 transitions. [2022-11-25 15:36:20,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 231 transitions, 2221 flow [2022-11-25 15:36:20,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 231 transitions, 2155 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-11-25 15:36:20,680 INFO L231 Difference]: Finished difference. Result has 193 places, 144 transitions, 1456 flow [2022-11-25 15:36:20,680 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=949, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1456, PETRI_PLACES=193, PETRI_TRANSITIONS=144} [2022-11-25 15:36:20,681 INFO L288 CegarLoopForPetriNet]: 137 programPoint places, 56 predicate places. [2022-11-25 15:36:20,681 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 144 transitions, 1456 flow [2022-11-25 15:36:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states 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 15:36:20,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:20,682 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:20,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 15:36:20,682 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-25 15:36:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash -92488807, now seen corresponding path program 5 times [2022-11-25 15:36:20,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:20,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428094934] [2022-11-25 15:36:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:20,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat