./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:55:31,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:55:31,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:55:31,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:55:31,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:55:31,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:55:31,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:55:31,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:55:31,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:55:31,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:55:31,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:55:31,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:55:31,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:55:31,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:55:31,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:55:31,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:55:31,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:55:31,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:55:31,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:55:31,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:55:31,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:55:31,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:55:31,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:55:31,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:55:31,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:55:31,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:55:31,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:55:31,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:55:31,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:55:31,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:55:31,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:55:31,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:55:31,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:55:31,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:55:31,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:55:31,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:55:31,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:55:31,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:55:31,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:55:31,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:55:31,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:55:31,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:55:31,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:55:31,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:55:31,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:55:31,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:55:31,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:55:31,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:55:31,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:55:31,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:55:31,735 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:55:31,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:55:31,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:55:31,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:55:31,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:55:31,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:55:31,736 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:55:31,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:55:31,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:55:31,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:55:31,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:55:31,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:55:31,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:55:31,738 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:55:31,739 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_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2022-12-13 19:55:31,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:55:31,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:55:31,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:55:31,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:55:31,966 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:55:31,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/queue_longest.i [2022-12-13 19:55:34,636 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:55:34,826 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:55:34,826 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i [2022-12-13 19:55:34,839 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/data/34581eec3/289802bfff9b4a698a2330217d357cac/FLAGdbe2fd5f6 [2022-12-13 19:55:34,850 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/data/34581eec3/289802bfff9b4a698a2330217d357cac [2022-12-13 19:55:34,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:55:34,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:55:34,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:55:34,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:55:34,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:55:34,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:55:34" (1/1) ... [2022-12-13 19:55:34,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cf8b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:34, skipping insertion in model container [2022-12-13 19:55:34,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:55:34" (1/1) ... [2022-12-13 19:55:34,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:55:34,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:55:35,222 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_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-12-13 19:55:35,226 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_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-12-13 19:55:35,229 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_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-12-13 19:55:35,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:55:35,244 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:55:35,285 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_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i[43296,43309] [2022-12-13 19:55:35,286 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_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i[43503,43516] [2022-12-13 19:55:35,289 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_f81ad680-986f-4897-89db-bb4d89eb80f5/sv-benchmarks/c/pthread/queue_longest.i[43783,43796] [2022-12-13 19:55:35,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:55:35,331 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:55:35,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35 WrapperNode [2022-12-13 19:55:35,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:55:35,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:55:35,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:55:35,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:55:35,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,379 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-12-13 19:55:35,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:55:35,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:55:35,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:55:35,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:55:35,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,418 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:55:35,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:55:35,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:55:35,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:55:35,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (1/1) ... [2022-12-13 19:55:35,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:55:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:55:35,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:55:35,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:55:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 19:55:35,489 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 19:55:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 19:55:35,489 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 19:55:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:55:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:55:35,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:55:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:55:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 19:55:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:55:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:55:35,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:55:35,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:55:35,491 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:55:35,596 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:55:35,598 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:55:35,992 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:55:36,000 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:55:36,001 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:55:36,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:55:36 BoogieIcfgContainer [2022-12-13 19:55:36,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:55:36,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:55:36,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:55:36,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:55:36,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:55:34" (1/3) ... [2022-12-13 19:55:36,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b1de74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:55:36, skipping insertion in model container [2022-12-13 19:55:36,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:55:35" (2/3) ... [2022-12-13 19:55:36,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b1de74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:55:36, skipping insertion in model container [2022-12-13 19:55:36,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:55:36" (3/3) ... [2022-12-13 19:55:36,011 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2022-12-13 19:55:36,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:55:36,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-12-13 19:55:36,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:55:36,135 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:55:36,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 352 transitions, 720 flow [2022-12-13 19:55:36,283 INFO L130 PetriNetUnfolder]: 15/350 cut-off events. [2022-12-13 19:55:36,283 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:55:36,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 350 events. 15/350 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 769 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 251. Up to 2 conditions per place. [2022-12-13 19:55:36,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 352 transitions, 720 flow [2022-12-13 19:55:36,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 345 transitions, 702 flow [2022-12-13 19:55:36,303 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:55:36,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 345 transitions, 702 flow [2022-12-13 19:55:36,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 345 transitions, 702 flow [2022-12-13 19:55:36,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 345 transitions, 702 flow [2022-12-13 19:55:36,363 INFO L130 PetriNetUnfolder]: 15/345 cut-off events. [2022-12-13 19:55:36,363 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:55:36,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 345 events. 15/345 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 750 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 251. Up to 2 conditions per place. [2022-12-13 19:55:36,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-12-13 19:55:49,632 INFO L134 LiptonReduction]: Checked pairs total: 108394 [2022-12-13 19:55:49,632 INFO L136 LiptonReduction]: Total number of compositions: 467 [2022-12-13 19:55:49,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:55:49,647 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;@394aa054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:55:49,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-12-13 19:55:49,648 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 19:55:49,648 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:55:49,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:49,649 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 19:55:49,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1497, now seen corresponding path program 1 times [2022-12-13 19:55:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:49,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271232634] [2022-12-13 19:55:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:49,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:49,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271232634] [2022-12-13 19:55:49,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271232634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:49,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:49,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 19:55:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850417160] [2022-12-13 19:55:49,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:55:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:55:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:55:49,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 819 [2022-12-13 19:55:49,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 339.5) internal successors, (679), 2 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:49,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:49,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 819 [2022-12-13 19:55:49,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:50,850 INFO L130 PetriNetUnfolder]: 7699/12270 cut-off events. [2022-12-13 19:55:50,851 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 19:55:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23994 conditions, 12270 events. 7699/12270 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 72261 event pairs, 6755 based on Foata normal form. 96/6359 useless extension candidates. Maximal degree in co-relation 23580. Up to 11611 conditions per place. [2022-12-13 19:55:50,904 INFO L137 encePairwiseOnDemand]: 770/819 looper letters, 84 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2022-12-13 19:55:50,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 366 flow [2022-12-13 19:55:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:55:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:55:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 811 transitions. [2022-12-13 19:55:50,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49511599511599513 [2022-12-13 19:55:50,918 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 811 transitions. [2022-12-13 19:55:50,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 811 transitions. [2022-12-13 19:55:50,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:50,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 811 transitions. [2022-12-13 19:55:50,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 405.5) internal successors, (811), 2 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:50,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 819.0) internal successors, (2457), 3 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:50,935 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 819.0) internal successors, (2457), 3 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:50,936 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 811 transitions. [2022-12-13 19:55:50,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 366 flow [2022-12-13 19:55:50,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 358 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:55:50,942 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2022-12-13 19:55:50,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2022-12-13 19:55:50,947 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2022-12-13 19:55:50,947 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2022-12-13 19:55:50,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 339.5) internal successors, (679), 2 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:50,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:50,948 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:55:50,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:55:50,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1478930, now seen corresponding path program 1 times [2022-12-13 19:55:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:50,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168405661] [2022-12-13 19:55:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168405661] [2022-12-13 19:55:51,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168405661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:51,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:51,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:55:51,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683657536] [2022-12-13 19:55:51,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:51,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:55:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:55:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:55:51,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 819 [2022-12-13 19:55:51,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:51,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:51,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 819 [2022-12-13 19:55:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:52,073 INFO L130 PetriNetUnfolder]: 6887/10986 cut-off events. [2022-12-13 19:55:52,074 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:55:52,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21395 conditions, 10986 events. 6887/10986 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 63610 event pairs, 5999 based on Foata normal form. 0/5859 useless extension candidates. Maximal degree in co-relation 21392. Up to 10365 conditions per place. [2022-12-13 19:55:52,128 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 78 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-13 19:55:52,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 342 flow [2022-12-13 19:55:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1092 transitions. [2022-12-13 19:55:52,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-12-13 19:55:52,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1092 transitions. [2022-12-13 19:55:52,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1092 transitions. [2022-12-13 19:55:52,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:52,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1092 transitions. [2022-12-13 19:55:52,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.0) internal successors, (1092), 3 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:52,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:52,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:52,142 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1092 transitions. [2022-12-13 19:55:52,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 342 flow [2022-12-13 19:55:52,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:55:52,144 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2022-12-13 19:55:52,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2022-12-13 19:55:52,144 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2022-12-13 19:55:52,145 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2022-12-13 19:55:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:52,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:52,145 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:55:52,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:55:52,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1478929, now seen corresponding path program 1 times [2022-12-13 19:55:52,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:52,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323438530] [2022-12-13 19:55:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:52,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323438530] [2022-12-13 19:55:52,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323438530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:52,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:52,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:55:52,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047328703] [2022-12-13 19:55:52,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:52,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:55:52,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:52,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:55:52,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:55:52,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 819 [2022-12-13 19:55:52,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:52,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:52,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 819 [2022-12-13 19:55:52,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:53,032 INFO L130 PetriNetUnfolder]: 5958/9521 cut-off events. [2022-12-13 19:55:53,033 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:55:53,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18508 conditions, 9521 events. 5958/9521 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 53855 event pairs, 5138 based on Foata normal form. 0/5382 useless extension candidates. Maximal degree in co-relation 18504. Up to 8945 conditions per place. [2022-12-13 19:55:53,057 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 74 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-12-13 19:55:53,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 326 flow [2022-12-13 19:55:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1091 transitions. [2022-12-13 19:55:53,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44403744403744405 [2022-12-13 19:55:53,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1091 transitions. [2022-12-13 19:55:53,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1091 transitions. [2022-12-13 19:55:53,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:53,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1091 transitions. [2022-12-13 19:55:53,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,065 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,065 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1091 transitions. [2022-12-13 19:55:53,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 326 flow [2022-12-13 19:55:53,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:55:53,067 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2022-12-13 19:55:53,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2022-12-13 19:55:53,067 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2022-12-13 19:55:53,068 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2022-12-13 19:55:53,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:53,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:55:53,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:55:53,068 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)] === [2022-12-13 19:55:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1478894, now seen corresponding path program 1 times [2022-12-13 19:55:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:53,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184932793] [2022-12-13 19:55:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:53,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184932793] [2022-12-13 19:55:53,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184932793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:53,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:53,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:55:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978584523] [2022-12-13 19:55:53,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:53,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:55:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:55:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:55:53,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 19:55:53,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:53,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 19:55:53,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:53,906 INFO L130 PetriNetUnfolder]: 5897/9399 cut-off events. [2022-12-13 19:55:53,906 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:55:53,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18269 conditions, 9399 events. 5897/9399 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 52861 event pairs, 5084 based on Foata normal form. 0/5339 useless extension candidates. Maximal degree in co-relation 18265. Up to 8828 conditions per place. [2022-12-13 19:55:53,930 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 71 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-12-13 19:55:53,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 316 flow [2022-12-13 19:55:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2022-12-13 19:55:53,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43833943833943834 [2022-12-13 19:55:53,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2022-12-13 19:55:53,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2022-12-13 19:55:53,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:53,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2022-12-13 19:55:53,935 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) [2022-12-13 19:55:53,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,939 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1077 transitions. [2022-12-13 19:55:53,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 316 flow [2022-12-13 19:55:53,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:55:53,941 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2022-12-13 19:55:53,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2022-12-13 19:55:53,941 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2022-12-13 19:55:53,942 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2022-12-13 19:55:53,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:53,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:53,942 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:55:53,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:55:53,943 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)] === [2022-12-13 19:55:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1478893, now seen corresponding path program 1 times [2022-12-13 19:55:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266939172] [2022-12-13 19:55:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:53,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266939172] [2022-12-13 19:55:53,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266939172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:53,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:53,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:55:53,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400181978] [2022-12-13 19:55:53,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:53,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:55:53,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:53,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:55:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:55:54,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 819 [2022-12-13 19:55:54,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:54,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:54,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 819 [2022-12-13 19:55:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:54,641 INFO L130 PetriNetUnfolder]: 5836/9277 cut-off events. [2022-12-13 19:55:54,641 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:55:54,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18033 conditions, 9277 events. 5836/9277 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 51857 event pairs, 5030 based on Foata normal form. 0/5296 useless extension candidates. Maximal degree in co-relation 18029. Up to 8712 conditions per place. [2022-12-13 19:55:54,663 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 69 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-12-13 19:55:54,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 311 flow [2022-12-13 19:55:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2022-12-13 19:55:54,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326414326414326 [2022-12-13 19:55:54,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2022-12-13 19:55:54,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2022-12-13 19:55:54,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:54,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2022-12-13 19:55:54,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:54,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:54,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:54,671 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1063 transitions. [2022-12-13 19:55:54,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 311 flow [2022-12-13 19:55:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:55:54,672 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2022-12-13 19:55:54,673 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2022-12-13 19:55:54,673 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2022-12-13 19:55:54,673 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2022-12-13 19:55:54,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:54,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:54,674 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:55:54,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:55:54,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash 45846359, now seen corresponding path program 1 times [2022-12-13 19:55:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644644202] [2022-12-13 19:55:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:54,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:55,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644644202] [2022-12-13 19:55:55,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644644202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:55,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:55,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:55:55,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663488640] [2022-12-13 19:55:55,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:55:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:55:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:55:55,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 819 [2022-12-13 19:55:55,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:55,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:55,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 819 [2022-12-13 19:55:55,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:56,632 INFO L130 PetriNetUnfolder]: 6145/9677 cut-off events. [2022-12-13 19:55:56,632 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 19:55:56,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18911 conditions, 9677 events. 6145/9677 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 53298 event pairs, 5116 based on Foata normal form. 0/5370 useless extension candidates. Maximal degree in co-relation 18907. Up to 9186 conditions per place. [2022-12-13 19:55:56,654 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 74 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-12-13 19:55:56,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 335 flow [2022-12-13 19:55:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2022-12-13 19:55:56,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42653642653642654 [2022-12-13 19:55:56,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2022-12-13 19:55:56,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2022-12-13 19:55:56,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:56,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2022-12-13 19:55:56,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:56,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:56,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:56,661 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 3 states and 1048 transitions. [2022-12-13 19:55:56,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 335 flow [2022-12-13 19:55:56,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:55:56,663 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 191 flow [2022-12-13 19:55:56,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2022-12-13 19:55:56,663 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -59 predicate places. [2022-12-13 19:55:56,663 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 191 flow [2022-12-13 19:55:56,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:56,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:56,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:55:56,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:55:56,664 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1421237092, now seen corresponding path program 1 times [2022-12-13 19:55:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947084269] [2022-12-13 19:55:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:56,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947084269] [2022-12-13 19:55:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947084269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:56,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:56,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:55:56,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315955358] [2022-12-13 19:55:56,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:56,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:55:56,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:55:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:55:57,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 819 [2022-12-13 19:55:57,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 320.25) internal successors, (1281), 4 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:57,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:57,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 819 [2022-12-13 19:55:57,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:57,882 INFO L130 PetriNetUnfolder]: 6367/9978 cut-off events. [2022-12-13 19:55:57,882 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2022-12-13 19:55:57,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 9978 events. 6367/9978 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 55737 event pairs, 1512 based on Foata normal form. 45/5671 useless extension candidates. Maximal degree in co-relation 19904. Up to 9196 conditions per place. [2022-12-13 19:55:57,907 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 90 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2022-12-13 19:55:57,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 103 transitions, 428 flow [2022-12-13 19:55:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2022-12-13 19:55:57,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4281644281644282 [2022-12-13 19:55:57,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2022-12-13 19:55:57,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2022-12-13 19:55:57,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:57,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2022-12-13 19:55:57,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:57,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:57,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:57,914 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 191 flow. Second operand 3 states and 1052 transitions. [2022-12-13 19:55:57,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 103 transitions, 428 flow [2022-12-13 19:55:57,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 103 transitions, 424 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:55:57,915 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 223 flow [2022-12-13 19:55:57,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2022-12-13 19:55:57,916 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2022-12-13 19:55:57,916 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 223 flow [2022-12-13 19:55:57,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 320.25) internal successors, (1281), 4 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:57,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:57,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:55:57,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:55:57,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1421235558, now seen corresponding path program 1 times [2022-12-13 19:55:57,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147807195] [2022-12-13 19:55:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:58,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147807195] [2022-12-13 19:55:58,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147807195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:58,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:58,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:55:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839652335] [2022-12-13 19:55:58,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:58,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:55:58,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:58,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:55:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:55:58,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 819 [2022-12-13 19:55:58,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:58,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:58,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 819 [2022-12-13 19:55:58,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:58,908 INFO L130 PetriNetUnfolder]: 5498/8729 cut-off events. [2022-12-13 19:55:58,908 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-12-13 19:55:58,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17505 conditions, 8729 events. 5498/8729 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 48878 event pairs, 1395 based on Foata normal form. 212/5523 useless extension candidates. Maximal degree in co-relation 17499. Up to 7537 conditions per place. [2022-12-13 19:55:58,931 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 94 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2022-12-13 19:55:58,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 455 flow [2022-12-13 19:55:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:55:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:55:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1370 transitions. [2022-12-13 19:55:58,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4181929181929182 [2022-12-13 19:55:58,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1370 transitions. [2022-12-13 19:55:58,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1370 transitions. [2022-12-13 19:55:58,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:58,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1370 transitions. [2022-12-13 19:55:58,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:58,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 819.0) internal successors, (4095), 5 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:58,944 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 819.0) internal successors, (4095), 5 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:58,944 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 223 flow. Second operand 4 states and 1370 transitions. [2022-12-13 19:55:58,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 455 flow [2022-12-13 19:55:58,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 450 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:55:58,947 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 199 flow [2022-12-13 19:55:58,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2022-12-13 19:55:58,948 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -59 predicate places. [2022-12-13 19:55:58,948 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 199 flow [2022-12-13 19:55:58,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:58,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:58,949 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:55:58,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:55:58,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:58,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1421250442, now seen corresponding path program 1 times [2022-12-13 19:55:58,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:58,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797007886] [2022-12-13 19:55:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:58,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:59,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:59,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797007886] [2022-12-13 19:55:59,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797007886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:59,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:59,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:55:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874901861] [2022-12-13 19:55:59,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:55:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:55:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:55:59,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 19:55:59,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:59,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:59,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 19:55:59,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:59,571 INFO L130 PetriNetUnfolder]: 3961/6470 cut-off events. [2022-12-13 19:55:59,571 INFO L131 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2022-12-13 19:55:59,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12957 conditions, 6470 events. 3961/6470 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 35353 event pairs, 3307 based on Foata normal form. 0/4206 useless extension candidates. Maximal degree in co-relation 12951. Up to 6031 conditions per place. [2022-12-13 19:55:59,587 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 66 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-12-13 19:55:59,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 333 flow [2022-12-13 19:55:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:55:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:55:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1069 transitions. [2022-12-13 19:55:59,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4350834350834351 [2022-12-13 19:55:59,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1069 transitions. [2022-12-13 19:55:59,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1069 transitions. [2022-12-13 19:55:59,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:55:59,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1069 transitions. [2022-12-13 19:55:59,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.3333333333333) internal successors, (1069), 3 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:59,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:59,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:59,593 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 199 flow. Second operand 3 states and 1069 transitions. [2022-12-13 19:55:59,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 333 flow [2022-12-13 19:55:59,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 79 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:55:59,596 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 197 flow [2022-12-13 19:55:59,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, 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=197, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2022-12-13 19:55:59,596 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2022-12-13 19:55:59,597 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 197 flow [2022-12-13 19:55:59,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:59,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:55:59,597 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:55:59,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:55:59,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:55:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:55:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1421250440, now seen corresponding path program 1 times [2022-12-13 19:55:59,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:55:59,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790786106] [2022-12-13 19:55:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:55:59,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:55:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:55:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:55:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:55:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790786106] [2022-12-13 19:55:59,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790786106] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:55:59,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:55:59,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:55:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709673590] [2022-12-13 19:55:59,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:55:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:55:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:55:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:55:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:55:59,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 819 [2022-12-13 19:55:59,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:59,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:55:59,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 819 [2022-12-13 19:55:59,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:00,093 INFO L130 PetriNetUnfolder]: 2447/4158 cut-off events. [2022-12-13 19:56:00,093 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-12-13 19:56:00,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8351 conditions, 4158 events. 2447/4158 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 22028 event pairs, 1997 based on Foata normal form. 0/3099 useless extension candidates. Maximal degree in co-relation 8345. Up to 3861 conditions per place. [2022-12-13 19:56:00,104 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 65 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 19:56:00,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 329 flow [2022-12-13 19:56:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2022-12-13 19:56:00,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2022-12-13 19:56:00,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2022-12-13 19:56:00,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2022-12-13 19:56:00,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:00,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2022-12-13 19:56:00,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-12-13 19:56:00,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,110 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 197 flow. Second operand 3 states and 1044 transitions. [2022-12-13 19:56:00,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 329 flow [2022-12-13 19:56:00,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 325 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:56:00,112 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 195 flow [2022-12-13 19:56:00,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2022-12-13 19:56:00,112 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -61 predicate places. [2022-12-13 19:56:00,112 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 195 flow [2022-12-13 19:56:00,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 327.25) internal successors, (1309), 4 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:00,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:00,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 19:56:00,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash 687349316, now seen corresponding path program 1 times [2022-12-13 19:56:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:00,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108103176] [2022-12-13 19:56:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:00,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:00,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108103176] [2022-12-13 19:56:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108103176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:00,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:00,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:56:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800413571] [2022-12-13 19:56:00,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:00,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:00,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 19:56:00,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:00,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 19:56:00,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:00,462 INFO L130 PetriNetUnfolder]: 1728/2984 cut-off events. [2022-12-13 19:56:00,462 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-12-13 19:56:00,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5971 conditions, 2984 events. 1728/2984 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13219 event pairs, 885 based on Foata normal form. 0/2251 useless extension candidates. Maximal degree in co-relation 5965. Up to 1824 conditions per place. [2022-12-13 19:56:00,469 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 92 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2022-12-13 19:56:00,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 433 flow [2022-12-13 19:56:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1097 transitions. [2022-12-13 19:56:00,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4464794464794465 [2022-12-13 19:56:00,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1097 transitions. [2022-12-13 19:56:00,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1097 transitions. [2022-12-13 19:56:00,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:00,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1097 transitions. [2022-12-13 19:56:00,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 365.6666666666667) internal successors, (1097), 3 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,479 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 195 flow. Second operand 3 states and 1097 transitions. [2022-12-13 19:56:00,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 433 flow [2022-12-13 19:56:00,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 419 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 19:56:00,482 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 181 flow [2022-12-13 19:56:00,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=166, 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=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2022-12-13 19:56:00,482 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -63 predicate places. [2022-12-13 19:56:00,483 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 181 flow [2022-12-13 19:56:00,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:00,483 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:00,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 19:56:00,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1200827140, now seen corresponding path program 1 times [2022-12-13 19:56:00,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:00,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324765659] [2022-12-13 19:56:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:00,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324765659] [2022-12-13 19:56:00,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324765659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:00,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:00,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:56:00,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035228358] [2022-12-13 19:56:00,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:00,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:00,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:00,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:00,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 819 [2022-12-13 19:56:00,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:00,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 819 [2022-12-13 19:56:00,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:00,901 INFO L130 PetriNetUnfolder]: 1562/2703 cut-off events. [2022-12-13 19:56:00,901 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2022-12-13 19:56:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5425 conditions, 2703 events. 1562/2703 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11580 event pairs, 1225 based on Foata normal form. 0/2104 useless extension candidates. Maximal degree in co-relation 5419. Up to 2509 conditions per place. [2022-12-13 19:56:00,907 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 19:56:00,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 299 flow [2022-12-13 19:56:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1054 transitions. [2022-12-13 19:56:00,909 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42897842897842897 [2022-12-13 19:56:00,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1054 transitions. [2022-12-13 19:56:00,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1054 transitions. [2022-12-13 19:56:00,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:00,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1054 transitions. [2022-12-13 19:56:00,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-12-13 19:56:00,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,913 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 181 flow. Second operand 3 states and 1054 transitions. [2022-12-13 19:56:00,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 299 flow [2022-12-13 19:56:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:00,915 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 176 flow [2022-12-13 19:56:00,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2022-12-13 19:56:00,916 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -65 predicate places. [2022-12-13 19:56:00,916 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 176 flow [2022-12-13 19:56:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.0) internal successors, (999), 3 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:00,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:00,917 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:00,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:56:00,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1200827139, now seen corresponding path program 1 times [2022-12-13 19:56:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:00,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857466752] [2022-12-13 19:56:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857466752] [2022-12-13 19:56:01,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857466752] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:01,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:01,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:56:01,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949439557] [2022-12-13 19:56:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:01,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:56:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:56:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:56:01,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 819 [2022-12-13 19:56:01,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:01,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:01,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 819 [2022-12-13 19:56:01,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:01,622 INFO L130 PetriNetUnfolder]: 1660/2842 cut-off events. [2022-12-13 19:56:01,622 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-12-13 19:56:01,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 2842 events. 1660/2842 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 12013 event pairs, 1301 based on Foata normal form. 0/2229 useless extension candidates. Maximal degree in co-relation 5728. Up to 2666 conditions per place. [2022-12-13 19:56:01,629 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 66 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2022-12-13 19:56:01,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 353 flow [2022-12-13 19:56:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:56:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:56:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1966 transitions. [2022-12-13 19:56:01,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4000814000814001 [2022-12-13 19:56:01,632 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1966 transitions. [2022-12-13 19:56:01,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1966 transitions. [2022-12-13 19:56:01,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:01,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1966 transitions. [2022-12-13 19:56:01,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 327.6666666666667) internal successors, (1966), 6 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:01,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:01,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:01,638 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 176 flow. Second operand 6 states and 1966 transitions. [2022-12-13 19:56:01,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 353 flow [2022-12-13 19:56:01,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:56:01,639 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 228 flow [2022-12-13 19:56:01,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2022-12-13 19:56:01,640 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -59 predicate places. [2022-12-13 19:56:01,640 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 228 flow [2022-12-13 19:56:01,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:01,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:01,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:01,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 19:56:01,640 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash -587859632, now seen corresponding path program 1 times [2022-12-13 19:56:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941437852] [2022-12-13 19:56:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:01,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:01,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941437852] [2022-12-13 19:56:01,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941437852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:01,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:01,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:56:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895328921] [2022-12-13 19:56:01,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:01,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:56:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:56:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:56:01,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 19:56:01,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:01,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:01,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 19:56:01,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:02,222 INFO L130 PetriNetUnfolder]: 1543/2672 cut-off events. [2022-12-13 19:56:02,222 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-12-13 19:56:02,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5448 conditions, 2672 events. 1543/2672 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11456 event pairs, 1210 based on Foata normal form. 0/2100 useless extension candidates. Maximal degree in co-relation 5439. Up to 2477 conditions per place. [2022-12-13 19:56:02,229 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 65 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 19:56:02,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 360 flow [2022-12-13 19:56:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:56:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:56:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1397 transitions. [2022-12-13 19:56:02,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264346764346764 [2022-12-13 19:56:02,231 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1397 transitions. [2022-12-13 19:56:02,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1397 transitions. [2022-12-13 19:56:02,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:02,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1397 transitions. [2022-12-13 19:56:02,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 349.25) internal successors, (1397), 4 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 819.0) internal successors, (4095), 5 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 819.0) internal successors, (4095), 5 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,235 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 228 flow. Second operand 4 states and 1397 transitions. [2022-12-13 19:56:02,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 360 flow [2022-12-13 19:56:02,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 352 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:02,237 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 222 flow [2022-12-13 19:56:02,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-12-13 19:56:02,237 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2022-12-13 19:56:02,238 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 222 flow [2022-12-13 19:56:02,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:02,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:02,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 19:56:02,238 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1043777870, now seen corresponding path program 1 times [2022-12-13 19:56:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289611740] [2022-12-13 19:56:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:02,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:02,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:02,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289611740] [2022-12-13 19:56:02,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289611740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:02,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:02,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:56:02,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440561474] [2022-12-13 19:56:02,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:02,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:02,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:02,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 19:56:02,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:02,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 19:56:02,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:02,573 INFO L130 PetriNetUnfolder]: 1531/2660 cut-off events. [2022-12-13 19:56:02,573 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-12-13 19:56:02,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5422 conditions, 2660 events. 1531/2660 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11442 event pairs, 1196 based on Foata normal form. 0/2100 useless extension candidates. Maximal degree in co-relation 5412. Up to 2428 conditions per place. [2022-12-13 19:56:02,579 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 70 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-12-13 19:56:02,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 85 transitions, 389 flow [2022-12-13 19:56:02,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2022-12-13 19:56:02,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4354904354904355 [2022-12-13 19:56:02,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2022-12-13 19:56:02,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2022-12-13 19:56:02,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:02,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2022-12-13 19:56:02,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,584 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 222 flow. Second operand 3 states and 1070 transitions. [2022-12-13 19:56:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 85 transitions, 389 flow [2022-12-13 19:56:02,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:56:02,585 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 225 flow [2022-12-13 19:56:02,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2022-12-13 19:56:02,585 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2022-12-13 19:56:02,586 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 225 flow [2022-12-13 19:56:02,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:02,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:02,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:02,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 19:56:02,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1953114911, now seen corresponding path program 1 times [2022-12-13 19:56:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:02,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338095214] [2022-12-13 19:56:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:02,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338095214] [2022-12-13 19:56:02,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338095214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:02,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:02,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:56:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761096067] [2022-12-13 19:56:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:56:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:56:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:56:03,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 819 [2022-12-13 19:56:03,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:03,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:03,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 819 [2022-12-13 19:56:03,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:03,960 INFO L130 PetriNetUnfolder]: 1727/2959 cut-off events. [2022-12-13 19:56:03,960 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-12-13 19:56:03,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6153 conditions, 2959 events. 1727/2959 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 12638 event pairs, 473 based on Foata normal form. 11/2384 useless extension candidates. Maximal degree in co-relation 6143. Up to 2563 conditions per place. [2022-12-13 19:56:03,967 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 90 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2022-12-13 19:56:03,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 511 flow [2022-12-13 19:56:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:56:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:56:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1948 transitions. [2022-12-13 19:56:03,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39641839641839643 [2022-12-13 19:56:03,970 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1948 transitions. [2022-12-13 19:56:03,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1948 transitions. [2022-12-13 19:56:03,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:03,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1948 transitions. [2022-12-13 19:56:03,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 324.6666666666667) internal successors, (1948), 6 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:03,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:03,975 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:03,975 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 225 flow. Second operand 6 states and 1948 transitions. [2022-12-13 19:56:03,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 511 flow [2022-12-13 19:56:03,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 501 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:56:03,978 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 271 flow [2022-12-13 19:56:03,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2022-12-13 19:56:03,978 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -53 predicate places. [2022-12-13 19:56:03,978 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 271 flow [2022-12-13 19:56:03,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:03,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:03,979 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:03,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 19:56:03,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:03,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2052465897, now seen corresponding path program 2 times [2022-12-13 19:56:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:03,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622532898] [2022-12-13 19:56:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:04,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:04,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622532898] [2022-12-13 19:56:04,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622532898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:04,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:04,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:56:04,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802872664] [2022-12-13 19:56:04,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:04,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:56:04,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:04,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:56:04,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:56:04,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 819 [2022-12-13 19:56:04,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 271 flow. Second operand has 6 states, 6 states have (on average 314.1666666666667) internal successors, (1885), 6 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:04,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:04,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 819 [2022-12-13 19:56:04,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:04,956 INFO L130 PetriNetUnfolder]: 1971/3382 cut-off events. [2022-12-13 19:56:04,956 INFO L131 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2022-12-13 19:56:04,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 3382 events. 1971/3382 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15130 event pairs, 555 based on Foata normal form. 11/2709 useless extension candidates. Maximal degree in co-relation 7106. Up to 2540 conditions per place. [2022-12-13 19:56:04,965 INFO L137 encePairwiseOnDemand]: 804/819 looper letters, 102 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2022-12-13 19:56:04,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 639 flow [2022-12-13 19:56:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:56:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:56:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1989 transitions. [2022-12-13 19:56:04,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2022-12-13 19:56:04,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1989 transitions. [2022-12-13 19:56:04,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1989 transitions. [2022-12-13 19:56:04,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:04,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1989 transitions. [2022-12-13 19:56:04,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 331.5) internal successors, (1989), 6 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:04,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:04,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:04,973 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 271 flow. Second operand 6 states and 1989 transitions. [2022-12-13 19:56:04,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 639 flow [2022-12-13 19:56:04,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 625 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:04,976 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 373 flow [2022-12-13 19:56:04,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2022-12-13 19:56:04,977 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2022-12-13 19:56:04,977 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 373 flow [2022-12-13 19:56:04,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 314.1666666666667) internal successors, (1885), 6 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:04,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:04,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:04,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 19:56:04,977 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:04,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash 239876057, now seen corresponding path program 3 times [2022-12-13 19:56:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:04,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992886358] [2022-12-13 19:56:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:04,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992886358] [2022-12-13 19:56:05,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992886358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:05,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:05,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:56:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134467787] [2022-12-13 19:56:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:05,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:56:05,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:56:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:56:05,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 819 [2022-12-13 19:56:05,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 373 flow. Second operand has 7 states, 7 states have (on average 311.85714285714283) internal successors, (2183), 7 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:05,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:05,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 819 [2022-12-13 19:56:05,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:06,258 INFO L130 PetriNetUnfolder]: 1932/3325 cut-off events. [2022-12-13 19:56:06,259 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2022-12-13 19:56:06,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7536 conditions, 3325 events. 1932/3325 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 14695 event pairs, 581 based on Foata normal form. 11/2824 useless extension candidates. Maximal degree in co-relation 7523. Up to 2672 conditions per place. [2022-12-13 19:56:06,268 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 92 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2022-12-13 19:56:06,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 113 transitions, 625 flow [2022-12-13 19:56:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:56:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:56:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1952 transitions. [2022-12-13 19:56:06,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3972323972323972 [2022-12-13 19:56:06,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1952 transitions. [2022-12-13 19:56:06,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1952 transitions. [2022-12-13 19:56:06,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:06,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1952 transitions. [2022-12-13 19:56:06,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.3333333333333) internal successors, (1952), 6 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:06,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:06,275 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:06,276 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 373 flow. Second operand 6 states and 1952 transitions. [2022-12-13 19:56:06,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 113 transitions, 625 flow [2022-12-13 19:56:06,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 607 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 19:56:06,279 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 363 flow [2022-12-13 19:56:06,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2022-12-13 19:56:06,279 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -46 predicate places. [2022-12-13 19:56:06,280 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 363 flow [2022-12-13 19:56:06,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 311.85714285714283) internal successors, (2183), 7 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:06,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:06,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:06,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 19:56:06,280 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1368654793, now seen corresponding path program 1 times [2022-12-13 19:56:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:06,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441380929] [2022-12-13 19:56:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441380929] [2022-12-13 19:56:06,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441380929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:06,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:06,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:56:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859836174] [2022-12-13 19:56:06,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:56:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:06,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:56:06,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:56:07,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 819 [2022-12-13 19:56:07,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 363 flow. Second operand has 10 states, 10 states have (on average 301.3) internal successors, (3013), 10 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:07,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:07,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 819 [2022-12-13 19:56:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:08,669 INFO L130 PetriNetUnfolder]: 1931/3330 cut-off events. [2022-12-13 19:56:08,669 INFO L131 PetriNetUnfolder]: For 1173/1173 co-relation queries the response was YES. [2022-12-13 19:56:08,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7579 conditions, 3330 events. 1931/3330 cut-off events. For 1173/1173 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 14732 event pairs, 1455 based on Foata normal form. 0/2815 useless extension candidates. Maximal degree in co-relation 7565. Up to 3119 conditions per place. [2022-12-13 19:56:08,678 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 81 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2022-12-13 19:56:08,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 104 transitions, 618 flow [2022-12-13 19:56:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:56:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:56:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2486 transitions. [2022-12-13 19:56:08,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3794261294261294 [2022-12-13 19:56:08,682 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2486 transitions. [2022-12-13 19:56:08,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2486 transitions. [2022-12-13 19:56:08,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:08,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2486 transitions. [2022-12-13 19:56:08,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 310.75) internal successors, (2486), 8 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:08,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 819.0) internal successors, (7371), 9 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:08,688 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 819.0) internal successors, (7371), 9 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:08,688 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 363 flow. Second operand 8 states and 2486 transitions. [2022-12-13 19:56:08,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 104 transitions, 618 flow [2022-12-13 19:56:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 104 transitions, 592 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 19:56:08,692 INFO L231 Difference]: Finished difference. Result has 98 places, 92 transitions, 425 flow [2022-12-13 19:56:08,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=425, PETRI_PLACES=98, PETRI_TRANSITIONS=92} [2022-12-13 19:56:08,692 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -41 predicate places. [2022-12-13 19:56:08,692 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 92 transitions, 425 flow [2022-12-13 19:56:08,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.3) internal successors, (3013), 10 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:08,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:08,693 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:08,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 19:56:08,693 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash 502586372, now seen corresponding path program 1 times [2022-12-13 19:56:08,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:08,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404703075] [2022-12-13 19:56:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:09,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:09,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404703075] [2022-12-13 19:56:09,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404703075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:09,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:09,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 19:56:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598170249] [2022-12-13 19:56:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:09,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:56:09,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:56:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:56:13,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 819 [2022-12-13 19:56:13,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 92 transitions, 425 flow. Second operand has 11 states, 11 states have (on average 296.27272727272725) internal successors, (3259), 11 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:13,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:13,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 819 [2022-12-13 19:56:13,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:15,468 INFO L130 PetriNetUnfolder]: 2208/3808 cut-off events. [2022-12-13 19:56:15,469 INFO L131 PetriNetUnfolder]: For 1078/1078 co-relation queries the response was YES. [2022-12-13 19:56:15,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8758 conditions, 3808 events. 2208/3808 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 17445 event pairs, 805 based on Foata normal form. 0/3230 useless extension candidates. Maximal degree in co-relation 8741. Up to 2884 conditions per place. [2022-12-13 19:56:15,480 INFO L137 encePairwiseOnDemand]: 808/819 looper letters, 129 selfloop transitions, 25 changer transitions 0/162 dead transitions. [2022-12-13 19:56:15,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 905 flow [2022-12-13 19:56:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:56:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:56:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2792 transitions. [2022-12-13 19:56:15,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37878171211504547 [2022-12-13 19:56:15,484 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2792 transitions. [2022-12-13 19:56:15,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2792 transitions. [2022-12-13 19:56:15,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:15,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2792 transitions. [2022-12-13 19:56:15,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 310.22222222222223) internal successors, (2792), 9 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:15,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 819.0) internal successors, (8190), 10 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:15,490 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 819.0) internal successors, (8190), 10 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:15,490 INFO L175 Difference]: Start difference. First operand has 98 places, 92 transitions, 425 flow. Second operand 9 states and 2792 transitions. [2022-12-13 19:56:15,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 905 flow [2022-12-13 19:56:15,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 884 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 19:56:15,495 INFO L231 Difference]: Finished difference. Result has 108 places, 98 transitions, 532 flow [2022-12-13 19:56:15,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=108, PETRI_TRANSITIONS=98} [2022-12-13 19:56:15,495 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -31 predicate places. [2022-12-13 19:56:15,495 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 98 transitions, 532 flow [2022-12-13 19:56:15,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 296.27272727272725) internal successors, (3259), 11 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:15,496 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:15,496 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 19:56:15,496 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1093986034, now seen corresponding path program 2 times [2022-12-13 19:56:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223334876] [2022-12-13 19:56:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223334876] [2022-12-13 19:56:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223334876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:16,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:16,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 19:56:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751439490] [2022-12-13 19:56:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:16,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:56:16,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:56:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:56:17,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 819 [2022-12-13 19:56:17,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 98 transitions, 532 flow. Second operand has 12 states, 12 states have (on average 295.1666666666667) internal successors, (3542), 12 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:17,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:17,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 819 [2022-12-13 19:56:17,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:18,707 INFO L130 PetriNetUnfolder]: 2469/4274 cut-off events. [2022-12-13 19:56:18,707 INFO L131 PetriNetUnfolder]: For 1984/1984 co-relation queries the response was YES. [2022-12-13 19:56:18,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10255 conditions, 4274 events. 2469/4274 cut-off events. For 1984/1984 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 20327 event pairs, 1716 based on Foata normal form. 0/3614 useless extension candidates. Maximal degree in co-relation 10232. Up to 3472 conditions per place. [2022-12-13 19:56:18,721 INFO L137 encePairwiseOnDemand]: 808/819 looper letters, 122 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2022-12-13 19:56:18,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 959 flow [2022-12-13 19:56:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:56:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:56:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2766 transitions. [2022-12-13 19:56:18,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37525437525437527 [2022-12-13 19:56:18,725 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2766 transitions. [2022-12-13 19:56:18,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2766 transitions. [2022-12-13 19:56:18,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:18,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2766 transitions. [2022-12-13 19:56:18,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 307.3333333333333) internal successors, (2766), 9 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:18,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 819.0) internal successors, (8190), 10 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:18,732 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 819.0) internal successors, (8190), 10 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:18,732 INFO L175 Difference]: Start difference. First operand has 108 places, 98 transitions, 532 flow. Second operand 9 states and 2766 transitions. [2022-12-13 19:56:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 959 flow [2022-12-13 19:56:18,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 919 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-12-13 19:56:18,739 INFO L231 Difference]: Finished difference. Result has 117 places, 104 transitions, 609 flow [2022-12-13 19:56:18,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=609, PETRI_PLACES=117, PETRI_TRANSITIONS=104} [2022-12-13 19:56:18,739 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -22 predicate places. [2022-12-13 19:56:18,739 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 104 transitions, 609 flow [2022-12-13 19:56:18,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 295.1666666666667) internal successors, (3542), 12 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:18,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:18,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 19:56:18,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:18,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash 521324300, now seen corresponding path program 3 times [2022-12-13 19:56:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:18,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806875362] [2022-12-13 19:56:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:19,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:19,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806875362] [2022-12-13 19:56:19,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806875362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:19,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:19,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 19:56:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485842270] [2022-12-13 19:56:19,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:56:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:56:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:56:20,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 819 [2022-12-13 19:56:20,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 104 transitions, 609 flow. Second operand has 12 states, 12 states have (on average 281.1666666666667) internal successors, (3374), 12 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:20,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:20,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 819 [2022-12-13 19:56:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:21,741 INFO L130 PetriNetUnfolder]: 2517/4354 cut-off events. [2022-12-13 19:56:21,741 INFO L131 PetriNetUnfolder]: For 1893/1893 co-relation queries the response was YES. [2022-12-13 19:56:21,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10480 conditions, 4354 events. 2517/4354 cut-off events. For 1893/1893 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 21005 event pairs, 644 based on Foata normal form. 0/3691 useless extension candidates. Maximal degree in co-relation 10453. Up to 2434 conditions per place. [2022-12-13 19:56:21,754 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 118 selfloop transitions, 31 changer transitions 0/156 dead transitions. [2022-12-13 19:56:21,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 156 transitions, 1022 flow [2022-12-13 19:56:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:56:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:56:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2359 transitions. [2022-12-13 19:56:21,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36004273504273504 [2022-12-13 19:56:21,758 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2359 transitions. [2022-12-13 19:56:21,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2359 transitions. [2022-12-13 19:56:21,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:21,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2359 transitions. [2022-12-13 19:56:21,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 294.875) internal successors, (2359), 8 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:21,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 819.0) internal successors, (7371), 9 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:21,764 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 819.0) internal successors, (7371), 9 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:21,764 INFO L175 Difference]: Start difference. First operand has 117 places, 104 transitions, 609 flow. Second operand 8 states and 2359 transitions. [2022-12-13 19:56:21,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 156 transitions, 1022 flow [2022-12-13 19:56:21,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1009 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:56:21,772 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 685 flow [2022-12-13 19:56:21,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=685, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2022-12-13 19:56:21,773 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -19 predicate places. [2022-12-13 19:56:21,773 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 685 flow [2022-12-13 19:56:21,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 281.1666666666667) internal successors, (3374), 12 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:21,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:21,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:21,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 19:56:21,774 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1473384968, now seen corresponding path program 1 times [2022-12-13 19:56:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:21,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497972206] [2022-12-13 19:56:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:22,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:22,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497972206] [2022-12-13 19:56:22,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497972206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:22,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:22,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:56:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537633331] [2022-12-13 19:56:22,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:22,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:56:22,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:56:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:56:25,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 819 [2022-12-13 19:56:25,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 685 flow. Second operand has 11 states, 11 states have (on average 286.54545454545456) internal successors, (3152), 11 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:25,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:25,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 819 [2022-12-13 19:56:25,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:26,441 INFO L130 PetriNetUnfolder]: 2713/4704 cut-off events. [2022-12-13 19:56:26,441 INFO L131 PetriNetUnfolder]: For 3214/3214 co-relation queries the response was YES. [2022-12-13 19:56:26,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11749 conditions, 4704 events. 2713/4704 cut-off events. For 3214/3214 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 23294 event pairs, 1934 based on Foata normal form. 0/3991 useless extension candidates. Maximal degree in co-relation 11721. Up to 4118 conditions per place. [2022-12-13 19:56:26,455 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 119 selfloop transitions, 19 changer transitions 0/145 dead transitions. [2022-12-13 19:56:26,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 145 transitions, 1100 flow [2022-12-13 19:56:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:56:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 19:56:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2961 transitions. [2022-12-13 19:56:26,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36153846153846153 [2022-12-13 19:56:26,459 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2961 transitions. [2022-12-13 19:56:26,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2961 transitions. [2022-12-13 19:56:26,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:26,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2961 transitions. [2022-12-13 19:56:26,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 296.1) internal successors, (2961), 10 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:26,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 819.0) internal successors, (9009), 11 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:26,467 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 819.0) internal successors, (9009), 11 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:26,467 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 685 flow. Second operand 10 states and 2961 transitions. [2022-12-13 19:56:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 145 transitions, 1100 flow [2022-12-13 19:56:26,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 145 transitions, 1053 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:56:26,478 INFO L231 Difference]: Finished difference. Result has 126 places, 108 transitions, 739 flow [2022-12-13 19:56:26,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=126, PETRI_TRANSITIONS=108} [2022-12-13 19:56:26,478 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2022-12-13 19:56:26,478 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 108 transitions, 739 flow [2022-12-13 19:56:26,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 286.54545454545456) internal successors, (3152), 11 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:26,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:26,479 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:26,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 19:56:26,479 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 291626763, now seen corresponding path program 1 times [2022-12-13 19:56:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:26,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786762322] [2022-12-13 19:56:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786762322] [2022-12-13 19:56:26,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786762322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:26,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:26,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:56:26,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764621077] [2022-12-13 19:56:26,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:26,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 19:56:26,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 19:56:26,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 19:56:28,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 819 [2022-12-13 19:56:28,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 108 transitions, 739 flow. Second operand has 11 states, 11 states have (on average 298.6363636363636) internal successors, (3285), 11 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:28,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:28,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 819 [2022-12-13 19:56:28,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:29,931 INFO L130 PetriNetUnfolder]: 2697/4677 cut-off events. [2022-12-13 19:56:29,931 INFO L131 PetriNetUnfolder]: For 3122/3122 co-relation queries the response was YES. [2022-12-13 19:56:29,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 4677 events. 2697/4677 cut-off events. For 3122/3122 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 23145 event pairs, 1031 based on Foata normal form. 11/4066 useless extension candidates. Maximal degree in co-relation 11678. Up to 3418 conditions per place. [2022-12-13 19:56:29,944 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 146 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2022-12-13 19:56:29,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 1262 flow [2022-12-13 19:56:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:56:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 19:56:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3113 transitions. [2022-12-13 19:56:29,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3800976800976801 [2022-12-13 19:56:29,948 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3113 transitions. [2022-12-13 19:56:29,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3113 transitions. [2022-12-13 19:56:29,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:29,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3113 transitions. [2022-12-13 19:56:29,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 311.3) internal successors, (3113), 10 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:29,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 819.0) internal successors, (9009), 11 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:29,955 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 819.0) internal successors, (9009), 11 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:29,955 INFO L175 Difference]: Start difference. First operand has 126 places, 108 transitions, 739 flow. Second operand 10 states and 3113 transitions. [2022-12-13 19:56:29,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 1262 flow [2022-12-13 19:56:29,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 180 transitions, 1236 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-12-13 19:56:29,967 INFO L231 Difference]: Finished difference. Result has 131 places, 108 transitions, 777 flow [2022-12-13 19:56:29,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=777, PETRI_PLACES=131, PETRI_TRANSITIONS=108} [2022-12-13 19:56:29,968 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -8 predicate places. [2022-12-13 19:56:29,968 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 108 transitions, 777 flow [2022-12-13 19:56:29,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 298.6363636363636) internal successors, (3285), 11 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:29,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:29,968 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:29,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 19:56:29,969 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash -729084479, now seen corresponding path program 2 times [2022-12-13 19:56:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:29,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066721081] [2022-12-13 19:56:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:30,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066721081] [2022-12-13 19:56:30,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066721081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:30,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:30,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 19:56:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374138426] [2022-12-13 19:56:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:56:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:56:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:56:32,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 819 [2022-12-13 19:56:32,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 108 transitions, 777 flow. Second operand has 12 states, 12 states have (on average 284.5) internal successors, (3414), 12 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:32,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:32,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 819 [2022-12-13 19:56:32,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:33,767 INFO L130 PetriNetUnfolder]: 2861/4966 cut-off events. [2022-12-13 19:56:33,767 INFO L131 PetriNetUnfolder]: For 4100/4100 co-relation queries the response was YES. [2022-12-13 19:56:33,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12649 conditions, 4966 events. 2861/4966 cut-off events. For 4100/4100 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 25070 event pairs, 790 based on Foata normal form. 22/4324 useless extension candidates. Maximal degree in co-relation 12617. Up to 2809 conditions per place. [2022-12-13 19:56:33,781 INFO L137 encePairwiseOnDemand]: 810/819 looper letters, 128 selfloop transitions, 31 changer transitions 0/166 dead transitions. [2022-12-13 19:56:33,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 166 transitions, 1259 flow [2022-12-13 19:56:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:56:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:56:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2386 transitions. [2022-12-13 19:56:33,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36416361416361415 [2022-12-13 19:56:33,784 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2386 transitions. [2022-12-13 19:56:33,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2386 transitions. [2022-12-13 19:56:33,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:33,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2386 transitions. [2022-12-13 19:56:33,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 298.25) internal successors, (2386), 8 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:33,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 819.0) internal successors, (7371), 9 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:33,790 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 819.0) internal successors, (7371), 9 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:33,790 INFO L175 Difference]: Start difference. First operand has 131 places, 108 transitions, 777 flow. Second operand 8 states and 2386 transitions. [2022-12-13 19:56:33,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 166 transitions, 1259 flow [2022-12-13 19:56:33,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 166 transitions, 1221 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 19:56:33,805 INFO L231 Difference]: Finished difference. Result has 133 places, 110 transitions, 854 flow [2022-12-13 19:56:33,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=854, PETRI_PLACES=133, PETRI_TRANSITIONS=110} [2022-12-13 19:56:33,806 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -6 predicate places. [2022-12-13 19:56:33,806 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 110 transitions, 854 flow [2022-12-13 19:56:33,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 284.5) internal successors, (3414), 12 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:33,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:33,806 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:33,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 19:56:33,806 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1883456453, now seen corresponding path program 3 times [2022-12-13 19:56:33,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:33,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263576086] [2022-12-13 19:56:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:33,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:34,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:34,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263576086] [2022-12-13 19:56:34,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263576086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:34,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:34,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 19:56:34,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224440587] [2022-12-13 19:56:34,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:56:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:56:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:56:37,039 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 819 [2022-12-13 19:56:37,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 110 transitions, 854 flow. Second operand has 13 states, 13 states have (on average 281.38461538461536) internal successors, (3658), 13 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:37,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:37,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 819 [2022-12-13 19:56:37,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:38,099 INFO L130 PetriNetUnfolder]: 2845/4932 cut-off events. [2022-12-13 19:56:38,100 INFO L131 PetriNetUnfolder]: For 5540/5540 co-relation queries the response was YES. [2022-12-13 19:56:38,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 4932 events. 2845/4932 cut-off events. For 5540/5540 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 24788 event pairs, 667 based on Foata normal form. 11/4280 useless extension candidates. Maximal degree in co-relation 12855. Up to 2453 conditions per place. [2022-12-13 19:56:38,116 INFO L137 encePairwiseOnDemand]: 810/819 looper letters, 122 selfloop transitions, 32 changer transitions 0/161 dead transitions. [2022-12-13 19:56:38,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 161 transitions, 1272 flow [2022-12-13 19:56:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:56:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 19:56:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2638 transitions. [2022-12-13 19:56:38,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3578890245556912 [2022-12-13 19:56:38,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2638 transitions. [2022-12-13 19:56:38,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2638 transitions. [2022-12-13 19:56:38,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:38,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2638 transitions. [2022-12-13 19:56:38,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.1111111111111) internal successors, (2638), 9 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:38,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 819.0) internal successors, (8190), 10 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:38,125 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 819.0) internal successors, (8190), 10 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:38,125 INFO L175 Difference]: Start difference. First operand has 133 places, 110 transitions, 854 flow. Second operand 9 states and 2638 transitions. [2022-12-13 19:56:38,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 161 transitions, 1272 flow [2022-12-13 19:56:38,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 161 transitions, 1219 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-12-13 19:56:38,143 INFO L231 Difference]: Finished difference. Result has 136 places, 110 transitions, 881 flow [2022-12-13 19:56:38,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=136, PETRI_TRANSITIONS=110} [2022-12-13 19:56:38,143 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2022-12-13 19:56:38,143 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 110 transitions, 881 flow [2022-12-13 19:56:38,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 281.38461538461536) internal successors, (3658), 13 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:38,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:38,144 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] [2022-12-13 19:56:38,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 19:56:38,144 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1730997462, now seen corresponding path program 1 times [2022-12-13 19:56:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:38,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357244170] [2022-12-13 19:56:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:38,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357244170] [2022-12-13 19:56:38,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357244170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:38,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:38,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 19:56:38,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129875855] [2022-12-13 19:56:38,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:38,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 19:56:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 19:56:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 19:56:39,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 819 [2022-12-13 19:56:39,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 110 transitions, 881 flow. Second operand has 13 states, 13 states have (on average 294.7692307692308) internal successors, (3832), 13 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:39,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:39,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 819 [2022-12-13 19:56:39,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:40,600 INFO L130 PetriNetUnfolder]: 2942/5095 cut-off events. [2022-12-13 19:56:40,601 INFO L131 PetriNetUnfolder]: For 6450/6450 co-relation queries the response was YES. [2022-12-13 19:56:40,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13300 conditions, 5095 events. 2942/5095 cut-off events. For 6450/6450 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 26110 event pairs, 1732 based on Foata normal form. 23/4436 useless extension candidates. Maximal degree in co-relation 13266. Up to 3849 conditions per place. [2022-12-13 19:56:40,623 INFO L137 encePairwiseOnDemand]: 799/819 looper letters, 161 selfloop transitions, 48 changer transitions 0/216 dead transitions. [2022-12-13 19:56:40,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 216 transitions, 1614 flow [2022-12-13 19:56:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:56:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:56:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4873 transitions. [2022-12-13 19:56:40,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3718711843711844 [2022-12-13 19:56:40,627 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4873 transitions. [2022-12-13 19:56:40,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4873 transitions. [2022-12-13 19:56:40,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:40,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4873 transitions. [2022-12-13 19:56:40,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 304.5625) internal successors, (4873), 16 states have internal predecessors, (4873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:40,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 819.0) internal successors, (13923), 17 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:40,639 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 819.0) internal successors, (13923), 17 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:40,639 INFO L175 Difference]: Start difference. First operand has 136 places, 110 transitions, 881 flow. Second operand 16 states and 4873 transitions. [2022-12-13 19:56:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 216 transitions, 1614 flow [2022-12-13 19:56:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 1564 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:56:40,657 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 1073 flow [2022-12-13 19:56:40,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1073, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2022-12-13 19:56:40,658 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 10 predicate places. [2022-12-13 19:56:40,658 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 1073 flow [2022-12-13 19:56:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 294.7692307692308) internal successors, (3832), 13 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:40,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:40,658 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] [2022-12-13 19:56:40,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 19:56:40,658 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)] === [2022-12-13 19:56:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1841901639, now seen corresponding path program 1 times [2022-12-13 19:56:40,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:40,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470209703] [2022-12-13 19:56:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:40,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:40,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470209703] [2022-12-13 19:56:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470209703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:40,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:40,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:56:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744611281] [2022-12-13 19:56:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:40,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:40,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:40,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 819 [2022-12-13 19:56:40,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 1073 flow. Second operand has 3 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:40,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:40,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 819 [2022-12-13 19:56:40,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:41,651 INFO L130 PetriNetUnfolder]: 4681/8318 cut-off events. [2022-12-13 19:56:41,651 INFO L131 PetriNetUnfolder]: For 12100/12149 co-relation queries the response was YES. [2022-12-13 19:56:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21872 conditions, 8318 events. 4681/8318 cut-off events. For 12100/12149 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 49274 event pairs, 2222 based on Foata normal form. 47/7367 useless extension candidates. Maximal degree in co-relation 21834. Up to 4597 conditions per place. [2022-12-13 19:56:41,679 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 182 selfloop transitions, 2 changer transitions 0/201 dead transitions. [2022-12-13 19:56:41,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 201 transitions, 1957 flow [2022-12-13 19:56:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1110 transitions. [2022-12-13 19:56:41,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517704517704518 [2022-12-13 19:56:41,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1110 transitions. [2022-12-13 19:56:41,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1110 transitions. [2022-12-13 19:56:41,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:41,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1110 transitions. [2022-12-13 19:56:41,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:41,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:41,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:41,684 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 1073 flow. Second operand 3 states and 1110 transitions. [2022-12-13 19:56:41,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 201 transitions, 1957 flow [2022-12-13 19:56:41,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 201 transitions, 1846 flow, removed 24 selfloop flow, removed 11 redundant places. [2022-12-13 19:56:41,707 INFO L231 Difference]: Finished difference. Result has 141 places, 126 transitions, 986 flow [2022-12-13 19:56:41,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=986, PETRI_PLACES=141, PETRI_TRANSITIONS=126} [2022-12-13 19:56:41,707 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2022-12-13 19:56:41,707 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 126 transitions, 986 flow [2022-12-13 19:56:41,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:41,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:41,708 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] [2022-12-13 19:56:41,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 19:56:41,708 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1996586071, now seen corresponding path program 1 times [2022-12-13 19:56:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:41,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562080944] [2022-12-13 19:56:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:42,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562080944] [2022-12-13 19:56:42,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562080944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:42,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:42,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 19:56:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508750096] [2022-12-13 19:56:42,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:42,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:56:42,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:56:42,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:56:44,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 819 [2022-12-13 19:56:44,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 126 transitions, 986 flow. Second operand has 15 states, 15 states have (on average 288.6) internal successors, (4329), 15 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:44,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:44,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 819 [2022-12-13 19:56:44,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:46,433 INFO L130 PetriNetUnfolder]: 5419/9318 cut-off events. [2022-12-13 19:56:46,433 INFO L131 PetriNetUnfolder]: For 11763/11763 co-relation queries the response was YES. [2022-12-13 19:56:46,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26521 conditions, 9318 events. 5419/9318 cut-off events. For 11763/11763 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 54471 event pairs, 1158 based on Foata normal form. 17/8517 useless extension candidates. Maximal degree in co-relation 26485. Up to 4885 conditions per place. [2022-12-13 19:56:46,468 INFO L137 encePairwiseOnDemand]: 797/819 looper letters, 265 selfloop transitions, 72 changer transitions 0/344 dead transitions. [2022-12-13 19:56:46,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 344 transitions, 2447 flow [2022-12-13 19:56:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:56:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 19:56:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7742 transitions. [2022-12-13 19:56:46,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3635765943458251 [2022-12-13 19:56:46,474 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7742 transitions. [2022-12-13 19:56:46,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7742 transitions. [2022-12-13 19:56:46,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:46,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7742 transitions. [2022-12-13 19:56:46,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 297.7692307692308) internal successors, (7742), 26 states have internal predecessors, (7742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:46,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 819.0) internal successors, (22113), 27 states have internal predecessors, (22113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:46,492 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 819.0) internal successors, (22113), 27 states have internal predecessors, (22113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:46,492 INFO L175 Difference]: Start difference. First operand has 141 places, 126 transitions, 986 flow. Second operand 26 states and 7742 transitions. [2022-12-13 19:56:46,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 344 transitions, 2447 flow [2022-12-13 19:56:46,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 344 transitions, 2397 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:46,538 INFO L231 Difference]: Finished difference. Result has 173 places, 139 transitions, 1315 flow [2022-12-13 19:56:46,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1315, PETRI_PLACES=173, PETRI_TRANSITIONS=139} [2022-12-13 19:56:46,539 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 34 predicate places. [2022-12-13 19:56:46,539 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 139 transitions, 1315 flow [2022-12-13 19:56:46,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 288.6) internal successors, (4329), 15 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:46,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:46,539 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] [2022-12-13 19:56:46,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 19:56:46,539 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1762955293, now seen corresponding path program 2 times [2022-12-13 19:56:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:46,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651167884] [2022-12-13 19:56:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:46,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:46,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:46,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651167884] [2022-12-13 19:56:46,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651167884] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:46,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:46,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:56:46,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929487489] [2022-12-13 19:56:46,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:46,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:56:46,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:56:46,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:56:46,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 819 [2022-12-13 19:56:46,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 139 transitions, 1315 flow. Second operand has 5 states, 5 states have (on average 332.4) internal successors, (1662), 5 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:46,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:46,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 819 [2022-12-13 19:56:46,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:48,317 INFO L130 PetriNetUnfolder]: 6708/11696 cut-off events. [2022-12-13 19:56:48,317 INFO L131 PetriNetUnfolder]: For 18570/18611 co-relation queries the response was YES. [2022-12-13 19:56:48,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35144 conditions, 11696 events. 6708/11696 cut-off events. For 18570/18611 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 73932 event pairs, 3370 based on Foata normal form. 76/10844 useless extension candidates. Maximal degree in co-relation 35100. Up to 8623 conditions per place. [2022-12-13 19:56:48,374 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 169 selfloop transitions, 6 changer transitions 0/193 dead transitions. [2022-12-13 19:56:48,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 193 transitions, 1956 flow [2022-12-13 19:56:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:56:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:56:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1734 transitions. [2022-12-13 19:56:48,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42344322344322344 [2022-12-13 19:56:48,376 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1734 transitions. [2022-12-13 19:56:48,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1734 transitions. [2022-12-13 19:56:48,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:48,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1734 transitions. [2022-12-13 19:56:48,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:48,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 819.0) internal successors, (4914), 6 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:48,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 819.0) internal successors, (4914), 6 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:48,380 INFO L175 Difference]: Start difference. First operand has 173 places, 139 transitions, 1315 flow. Second operand 5 states and 1734 transitions. [2022-12-13 19:56:48,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 193 transitions, 1956 flow [2022-12-13 19:56:48,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 193 transitions, 1845 flow, removed 18 selfloop flow, removed 13 redundant places. [2022-12-13 19:56:48,463 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1234 flow [2022-12-13 19:56:48,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1234, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2022-12-13 19:56:48,463 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 26 predicate places. [2022-12-13 19:56:48,464 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1234 flow [2022-12-13 19:56:48,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 332.4) internal successors, (1662), 5 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:48,464 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:48,464 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-12-13 19:56:48,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 19:56:48,464 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash -619543370, now seen corresponding path program 1 times [2022-12-13 19:56:48,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:48,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705710937] [2022-12-13 19:56:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:48,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705710937] [2022-12-13 19:56:48,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705710937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:48,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:48,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:56:48,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882608363] [2022-12-13 19:56:48,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:48,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:48,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:48,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 819 [2022-12-13 19:56:48,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1234 flow. Second operand has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:48,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:48,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 819 [2022-12-13 19:56:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:49,410 INFO L130 PetriNetUnfolder]: 4369/7746 cut-off events. [2022-12-13 19:56:49,410 INFO L131 PetriNetUnfolder]: For 12682/12723 co-relation queries the response was YES. [2022-12-13 19:56:49,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23275 conditions, 7746 events. 4369/7746 cut-off events. For 12682/12723 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 46532 event pairs, 2440 based on Foata normal form. 41/7523 useless extension candidates. Maximal degree in co-relation 23233. Up to 4330 conditions per place. [2022-12-13 19:56:49,441 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 136 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2022-12-13 19:56:49,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 154 transitions, 1543 flow [2022-12-13 19:56:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1074 transitions. [2022-12-13 19:56:49,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371184371184371 [2022-12-13 19:56:49,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1074 transitions. [2022-12-13 19:56:49,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1074 transitions. [2022-12-13 19:56:49,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:49,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1074 transitions. [2022-12-13 19:56:49,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:49,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:49,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:49,445 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1234 flow. Second operand 3 states and 1074 transitions. [2022-12-13 19:56:49,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 154 transitions, 1543 flow [2022-12-13 19:56:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 154 transitions, 1517 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 19:56:49,510 INFO L231 Difference]: Finished difference. Result has 165 places, 136 transitions, 1178 flow [2022-12-13 19:56:49,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1178, PETRI_PLACES=165, PETRI_TRANSITIONS=136} [2022-12-13 19:56:49,510 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 26 predicate places. [2022-12-13 19:56:49,510 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 136 transitions, 1178 flow [2022-12-13 19:56:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:49,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:49,511 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, 1] [2022-12-13 19:56:49,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 19:56:49,511 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash 151776398, now seen corresponding path program 1 times [2022-12-13 19:56:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932705308] [2022-12-13 19:56:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:49,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932705308] [2022-12-13 19:56:49,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932705308] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:49,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:49,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:56:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609798440] [2022-12-13 19:56:49,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:49,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:49,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 819 [2022-12-13 19:56:49,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 136 transitions, 1178 flow. Second operand has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:49,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:49,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 819 [2022-12-13 19:56:49,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:50,251 INFO L130 PetriNetUnfolder]: 3093/5707 cut-off events. [2022-12-13 19:56:50,251 INFO L131 PetriNetUnfolder]: For 6723/6726 co-relation queries the response was YES. [2022-12-13 19:56:50,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 5707 events. 3093/5707 cut-off events. For 6723/6726 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 32691 event pairs, 849 based on Foata normal form. 547/6133 useless extension candidates. Maximal degree in co-relation 16903. Up to 3980 conditions per place. [2022-12-13 19:56:50,273 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 129 selfloop transitions, 6 changer transitions 0/150 dead transitions. [2022-12-13 19:56:50,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 150 transitions, 1513 flow [2022-12-13 19:56:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-12-13 19:56:50,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43304843304843305 [2022-12-13 19:56:50,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-12-13 19:56:50,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-12-13 19:56:50,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:50,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-12-13 19:56:50,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:50,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:50,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 819.0) internal successors, (3276), 4 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:50,277 INFO L175 Difference]: Start difference. First operand has 165 places, 136 transitions, 1178 flow. Second operand 3 states and 1064 transitions. [2022-12-13 19:56:50,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 150 transitions, 1513 flow [2022-12-13 19:56:50,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 150 transitions, 1507 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:56:50,301 INFO L231 Difference]: Finished difference. Result has 165 places, 136 transitions, 1184 flow [2022-12-13 19:56:50,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1184, PETRI_PLACES=165, PETRI_TRANSITIONS=136} [2022-12-13 19:56:50,302 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 26 predicate places. [2022-12-13 19:56:50,302 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 136 transitions, 1184 flow [2022-12-13 19:56:50,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:50,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:50,302 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, 1, 1] [2022-12-13 19:56:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 19:56:50,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2015261657, now seen corresponding path program 1 times [2022-12-13 19:56:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982158765] [2022-12-13 19:56:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:56:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:50,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982158765] [2022-12-13 19:56:50,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982158765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:56:50,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012326953] [2022-12-13 19:56:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:56:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:56:50,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:56:50,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:56:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:50,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:56:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:56:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:56:50,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:56:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:56:50,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012326953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:56:50,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:56:50,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 19:56:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927590027] [2022-12-13 19:56:50,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:56:50,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:56:50,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:56:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:56:50,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 19:56:50,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 136 transitions, 1184 flow. Second operand has 7 states, 7 states have (on average 339.7142857142857) internal successors, (2378), 7 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:50,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:50,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 19:56:50,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:52,068 INFO L130 PetriNetUnfolder]: 4748/9328 cut-off events. [2022-12-13 19:56:52,068 INFO L131 PetriNetUnfolder]: For 11816/11877 co-relation queries the response was YES. [2022-12-13 19:56:52,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27273 conditions, 9328 events. 4748/9328 cut-off events. For 11816/11877 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 63577 event pairs, 731 based on Foata normal form. 829/9755 useless extension candidates. Maximal degree in co-relation 27231. Up to 1910 conditions per place. [2022-12-13 19:56:52,110 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 364 selfloop transitions, 6 changer transitions 0/387 dead transitions. [2022-12-13 19:56:52,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 387 transitions, 3550 flow [2022-12-13 19:56:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:56:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:56:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2237 transitions. [2022-12-13 19:56:52,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45522995522995524 [2022-12-13 19:56:52,113 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2237 transitions. [2022-12-13 19:56:52,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2237 transitions. [2022-12-13 19:56:52,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:52,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2237 transitions. [2022-12-13 19:56:52,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 372.8333333333333) internal successors, (2237), 6 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:52,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:52,118 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 819.0) internal successors, (5733), 7 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:52,118 INFO L175 Difference]: Start difference. First operand has 165 places, 136 transitions, 1184 flow. Second operand 6 states and 2237 transitions. [2022-12-13 19:56:52,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 387 transitions, 3550 flow [2022-12-13 19:56:52,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 387 transitions, 3528 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:52,147 INFO L231 Difference]: Finished difference. Result has 173 places, 139 transitions, 1219 flow [2022-12-13 19:56:52,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1219, PETRI_PLACES=173, PETRI_TRANSITIONS=139} [2022-12-13 19:56:52,147 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 34 predicate places. [2022-12-13 19:56:52,147 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 139 transitions, 1219 flow [2022-12-13 19:56:52,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 339.7142857142857) internal successors, (2378), 7 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:52,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:52,147 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, 1, 1] [2022-12-13 19:56:52,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:56:52,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f81ad680-986f-4897-89db-bb4d89eb80f5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:56:52,349 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1950948392, now seen corresponding path program 1 times [2022-12-13 19:56:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:52,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765666839] [2022-12-13 19:56:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:52,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:53,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765666839] [2022-12-13 19:56:53,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765666839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:53,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:53,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 19:56:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039399192] [2022-12-13 19:56:53,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:53,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:56:53,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:56:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:56:56,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 819 [2022-12-13 19:56:56,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 139 transitions, 1219 flow. Second operand has 16 states, 16 states have (on average 292.8125) internal successors, (4685), 16 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:56,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:56,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 819 [2022-12-13 19:56:56,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:57,818 INFO L130 PetriNetUnfolder]: 5116/9853 cut-off events. [2022-12-13 19:56:57,818 INFO L131 PetriNetUnfolder]: For 19451/19451 co-relation queries the response was YES. [2022-12-13 19:56:57,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32362 conditions, 9853 events. 5116/9853 cut-off events. For 19451/19451 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 64774 event pairs, 2466 based on Foata normal form. 23/9479 useless extension candidates. Maximal degree in co-relation 32316. Up to 4031 conditions per place. [2022-12-13 19:56:57,868 INFO L137 encePairwiseOnDemand]: 801/819 looper letters, 198 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2022-12-13 19:56:57,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 274 transitions, 2590 flow [2022-12-13 19:56:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:56:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:56:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4823 transitions. [2022-12-13 19:56:57,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2022-12-13 19:56:57,873 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4823 transitions. [2022-12-13 19:56:57,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4823 transitions. [2022-12-13 19:56:57,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:57,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4823 transitions. [2022-12-13 19:56:57,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 301.4375) internal successors, (4823), 16 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:57,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 819.0) internal successors, (13923), 17 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:57,883 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 819.0) internal successors, (13923), 17 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:57,883 INFO L175 Difference]: Start difference. First operand has 173 places, 139 transitions, 1219 flow. Second operand 16 states and 4823 transitions. [2022-12-13 19:56:57,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 274 transitions, 2590 flow [2022-12-13 19:56:57,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 274 transitions, 2477 flow, removed 42 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:57,981 INFO L231 Difference]: Finished difference. Result has 192 places, 145 transitions, 1448 flow [2022-12-13 19:56:57,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1448, PETRI_PLACES=192, PETRI_TRANSITIONS=145} [2022-12-13 19:56:57,982 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 53 predicate places. [2022-12-13 19:56:57,982 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 145 transitions, 1448 flow [2022-12-13 19:56:57,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 292.8125) internal successors, (4685), 16 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:56:57,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:57,983 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, 1, 1] [2022-12-13 19:56:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 19:56:57,983 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:56:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2135888528, now seen corresponding path program 2 times [2022-12-13 19:56:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:56:57,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918756732] [2022-12-13 19:56:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:57,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:56:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:56:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918756732] [2022-12-13 19:56:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918756732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:58,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:58,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 19:56:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393521679] [2022-12-13 19:56:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:56:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:56:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:56:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:57:01,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 819 [2022-12-13 19:57:01,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 145 transitions, 1448 flow. Second operand has 16 states, 16 states have (on average 292.8125) internal successors, (4685), 16 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:01,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:01,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 819 [2022-12-13 19:57:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:57:03,179 INFO L130 PetriNetUnfolder]: 5034/9789 cut-off events. [2022-12-13 19:57:03,179 INFO L131 PetriNetUnfolder]: For 19588/19588 co-relation queries the response was YES. [2022-12-13 19:57:03,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32531 conditions, 9789 events. 5034/9789 cut-off events. For 19588/19588 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 64766 event pairs, 1590 based on Foata normal form. 23/9415 useless extension candidates. Maximal degree in co-relation 32479. Up to 3942 conditions per place. [2022-12-13 19:57:03,225 INFO L137 encePairwiseOnDemand]: 801/819 looper letters, 188 selfloop transitions, 74 changer transitions 0/268 dead transitions. [2022-12-13 19:57:03,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 268 transitions, 2640 flow [2022-12-13 19:57:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:57:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 19:57:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4815 transitions. [2022-12-13 19:57:03,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36744505494505497 [2022-12-13 19:57:03,230 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4815 transitions. [2022-12-13 19:57:03,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4815 transitions. [2022-12-13 19:57:03,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:57:03,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4815 transitions. [2022-12-13 19:57:03,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 300.9375) internal successors, (4815), 16 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:03,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 819.0) internal successors, (13923), 17 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:03,240 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 819.0) internal successors, (13923), 17 states have internal predecessors, (13923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:03,240 INFO L175 Difference]: Start difference. First operand has 192 places, 145 transitions, 1448 flow. Second operand 16 states and 4815 transitions. [2022-12-13 19:57:03,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 268 transitions, 2640 flow [2022-12-13 19:57:03,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 268 transitions, 2521 flow, removed 11 selfloop flow, removed 10 redundant places. [2022-12-13 19:57:03,317 INFO L231 Difference]: Finished difference. Result has 201 places, 151 transitions, 1590 flow [2022-12-13 19:57:03,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1590, PETRI_PLACES=201, PETRI_TRANSITIONS=151} [2022-12-13 19:57:03,317 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 62 predicate places. [2022-12-13 19:57:03,317 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 151 transitions, 1590 flow [2022-12-13 19:57:03,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 292.8125) internal successors, (4685), 16 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:03,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:57:03,318 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, 1, 1] [2022-12-13 19:57:03,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 19:57:03,318 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:57:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:57:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash 29048394, now seen corresponding path program 3 times [2022-12-13 19:57:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:57:03,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054250749] [2022-12-13 19:57:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:57:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:57:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:57:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:57:04,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:57:04,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054250749] [2022-12-13 19:57:04,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054250749] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:57:04,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:57:04,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-12-13 19:57:04,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617107333] [2022-12-13 19:57:04,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:57:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:57:04,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:57:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:57:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:57:07,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 819 [2022-12-13 19:57:07,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 151 transitions, 1590 flow. Second operand has 17 states, 17 states have (on average 292.70588235294116) internal successors, (4976), 17 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:07,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:07,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 819 [2022-12-13 19:57:07,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:57:09,885 INFO L130 PetriNetUnfolder]: 5054/9829 cut-off events. [2022-12-13 19:57:09,885 INFO L131 PetriNetUnfolder]: For 21450/21450 co-relation queries the response was YES. [2022-12-13 19:57:09,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33746 conditions, 9829 events. 5054/9829 cut-off events. For 21450/21450 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 65141 event pairs, 1622 based on Foata normal form. 5/9437 useless extension candidates. Maximal degree in co-relation 33690. Up to 3936 conditions per place. [2022-12-13 19:57:09,935 INFO L137 encePairwiseOnDemand]: 802/819 looper letters, 186 selfloop transitions, 72 changer transitions 0/264 dead transitions. [2022-12-13 19:57:09,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 264 transitions, 2711 flow [2022-12-13 19:57:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:57:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:57:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4225 transitions. [2022-12-13 19:57:09,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36848072562358275 [2022-12-13 19:57:09,939 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4225 transitions. [2022-12-13 19:57:09,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4225 transitions. [2022-12-13 19:57:09,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:57:09,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4225 transitions. [2022-12-13 19:57:09,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 301.7857142857143) internal successors, (4225), 14 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:09,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 819.0) internal successors, (12285), 15 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:09,949 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 819.0) internal successors, (12285), 15 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:09,949 INFO L175 Difference]: Start difference. First operand has 201 places, 151 transitions, 1590 flow. Second operand 14 states and 4225 transitions. [2022-12-13 19:57:09,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 264 transitions, 2711 flow [2022-12-13 19:57:10,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 264 transitions, 2596 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-12-13 19:57:10,045 INFO L231 Difference]: Finished difference. Result has 207 places, 155 transitions, 1704 flow [2022-12-13 19:57:10,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1704, PETRI_PLACES=207, PETRI_TRANSITIONS=155} [2022-12-13 19:57:10,045 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 68 predicate places. [2022-12-13 19:57:10,045 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 155 transitions, 1704 flow [2022-12-13 19:57:10,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 292.70588235294116) internal successors, (4976), 17 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:10,046 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:57:10,046 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, 1, 1] [2022-12-13 19:57:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 19:57:10,046 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:57:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:57:10,046 INFO L85 PathProgramCache]: Analyzing trace with hash -115388130, now seen corresponding path program 4 times [2022-12-13 19:57:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:57:10,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073376418] [2022-12-13 19:57:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:57:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:57:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:57:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:57:11,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:57:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073376418] [2022-12-13 19:57:11,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073376418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:57:11,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:57:11,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 19:57:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506054516] [2022-12-13 19:57:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:57:11,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 19:57:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:57:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 19:57:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:57:13,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 819 [2022-12-13 19:57:13,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 155 transitions, 1704 flow. Second operand has 15 states, 15 states have (on average 292.93333333333334) internal successors, (4394), 15 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:13,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:13,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 819 [2022-12-13 19:57:13,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:57:15,325 INFO L130 PetriNetUnfolder]: 5054/9832 cut-off events. [2022-12-13 19:57:15,325 INFO L131 PetriNetUnfolder]: For 23778/23778 co-relation queries the response was YES. [2022-12-13 19:57:15,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34615 conditions, 9832 events. 5054/9832 cut-off events. For 23778/23778 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 64925 event pairs, 1497 based on Foata normal form. 5/9440 useless extension candidates. Maximal degree in co-relation 34556. Up to 3936 conditions per place. [2022-12-13 19:57:15,368 INFO L137 encePairwiseOnDemand]: 802/819 looper letters, 195 selfloop transitions, 77 changer transitions 0/278 dead transitions. [2022-12-13 19:57:15,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 278 transitions, 2917 flow [2022-12-13 19:57:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:57:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 19:57:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4521 transitions. [2022-12-13 19:57:15,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36800976800976803 [2022-12-13 19:57:15,372 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4521 transitions. [2022-12-13 19:57:15,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4521 transitions. [2022-12-13 19:57:15,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:57:15,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4521 transitions. [2022-12-13 19:57:15,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 301.4) internal successors, (4521), 15 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:15,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 819.0) internal successors, (13104), 16 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:15,382 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 819.0) internal successors, (13104), 16 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:15,382 INFO L175 Difference]: Start difference. First operand has 207 places, 155 transitions, 1704 flow. Second operand 15 states and 4521 transitions. [2022-12-13 19:57:15,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 278 transitions, 2917 flow [2022-12-13 19:57:15,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 278 transitions, 2843 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-12-13 19:57:15,499 INFO L231 Difference]: Finished difference. Result has 216 places, 158 transitions, 1851 flow [2022-12-13 19:57:15,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=158} [2022-12-13 19:57:15,499 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 77 predicate places. [2022-12-13 19:57:15,499 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 158 transitions, 1851 flow [2022-12-13 19:57:15,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 292.93333333333334) internal successors, (4394), 15 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:15,500 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:57:15,500 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, 1, 1, 1] [2022-12-13 19:57:15,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 19:57:15,500 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:57:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:57:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1354256406, now seen corresponding path program 1 times [2022-12-13 19:57:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:57:15,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329606295] [2022-12-13 19:57:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:57:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:57:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:57:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:57:16,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:57:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329606295] [2022-12-13 19:57:16,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329606295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:57:16,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:57:16,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 19:57:16,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606033216] [2022-12-13 19:57:16,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:57:16,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:57:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:57:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:57:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:57:19,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 819 [2022-12-13 19:57:19,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 158 transitions, 1851 flow. Second operand has 17 states, 17 states have (on average 287.7647058823529) internal successors, (4892), 17 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:19,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:19,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 819 [2022-12-13 19:57:19,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:57:21,582 INFO L130 PetriNetUnfolder]: 5695/11037 cut-off events. [2022-12-13 19:57:21,582 INFO L131 PetriNetUnfolder]: For 29509/29509 co-relation queries the response was YES. [2022-12-13 19:57:21,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38798 conditions, 11037 events. 5695/11037 cut-off events. For 29509/29509 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 74618 event pairs, 2279 based on Foata normal form. 0/10560 useless extension candidates. Maximal degree in co-relation 38736. Up to 4152 conditions per place. [2022-12-13 19:57:21,634 INFO L137 encePairwiseOnDemand]: 806/819 looper letters, 215 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2022-12-13 19:57:21,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 268 transitions, 2927 flow [2022-12-13 19:57:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:57:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:57:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3298 transitions. [2022-12-13 19:57:21,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3660783660783661 [2022-12-13 19:57:21,640 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3298 transitions. [2022-12-13 19:57:21,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3298 transitions. [2022-12-13 19:57:21,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:57:21,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3298 transitions. [2022-12-13 19:57:21,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 299.8181818181818) internal successors, (3298), 11 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:21,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 819.0) internal successors, (9828), 12 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:21,651 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 819.0) internal successors, (9828), 12 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:21,651 INFO L175 Difference]: Start difference. First operand has 216 places, 158 transitions, 1851 flow. Second operand 11 states and 3298 transitions. [2022-12-13 19:57:21,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 268 transitions, 2927 flow [2022-12-13 19:57:21,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 268 transitions, 2790 flow, removed 1 selfloop flow, removed 12 redundant places. [2022-12-13 19:57:21,780 INFO L231 Difference]: Finished difference. Result has 216 places, 160 transitions, 1829 flow [2022-12-13 19:57:21,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1829, PETRI_PLACES=216, PETRI_TRANSITIONS=160} [2022-12-13 19:57:21,781 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 77 predicate places. [2022-12-13 19:57:21,781 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 160 transitions, 1829 flow [2022-12-13 19:57:21,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 287.7647058823529) internal successors, (4892), 17 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:57:21,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:57:21,781 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, 1, 1, 1] [2022-12-13 19:57:21,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-13 19:57:21,781 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 19:57:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:57:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash -475047972, now seen corresponding path program 2 times [2022-12-13 19:57:21,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:57:21,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067164949] [2022-12-13 19:57:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:57:21,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:57:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat