./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longer.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_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/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_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/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_d48cb7ed-795f-44e2-8b71-1b1564984f55/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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- 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 21:22:31,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:22:31,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:22:31,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:22:31,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:22:31,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:22:31,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:22:31,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:22:31,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:22:31,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:22:31,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:22:31,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:22:31,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:22:31,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:22:31,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:22:31,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:22:31,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:22:31,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:22:31,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:22:31,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:22:31,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:22:31,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:22:31,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:22:31,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:22:31,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:22:31,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:22:31,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:22:31,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:22:31,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:22:31,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:22:31,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:22:31,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:22:31,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:22:31,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:22:31,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:22:31,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:22:31,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:22:31,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:22:31,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:22:31,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:22:31,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:22:31,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 21:22:31,666 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:22:31,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:22:31,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:22:31,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:22:31,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:22:31,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:22:31,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:22:31,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:22:31,668 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:22:31,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:22:31,668 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:22:31,668 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 21:22:31,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:22:31,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:22:31,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:22:31,675 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 21:22:31,675 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 21:22:31,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:22:31,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:22:31,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:22:31,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:22:31,677 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:22:31,678 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2022-12-13 21:22:31,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:22:31,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:22:31,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:22:31,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:22:31,874 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:22:31,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/queue_longer.i [2022-12-13 21:22:34,541 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:22:34,737 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:22:34,738 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i [2022-12-13 21:22:34,747 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/data/8057a5feb/7b7350ddd6e74d0592741eec92cab904/FLAG6cf32db03 [2022-12-13 21:22:34,758 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/data/8057a5feb/7b7350ddd6e74d0592741eec92cab904 [2022-12-13 21:22:34,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:22:34,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:22:34,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:22:34,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:22:34,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:22:34,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:22:34" (1/1) ... [2022-12-13 21:22:34,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39534cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:34, skipping insertion in model container [2022-12-13 21:22:34,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:22:34" (1/1) ... [2022-12-13 21:22:34,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:22:34,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:22:35,115 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-12-13 21:22:35,119 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-12-13 21:22:35,121 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-12-13 21:22:35,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:22:35,132 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:22:35,159 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-12-13 21:22:35,160 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-12-13 21:22:35,162 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_d48cb7ed-795f-44e2-8b71-1b1564984f55/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-12-13 21:22:35,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:22:35,195 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:22:35,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35 WrapperNode [2022-12-13 21:22:35,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:22:35,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:22:35,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:22:35,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:22:35,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,231 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-12-13 21:22:35,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:22:35,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:22:35,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:22:35,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:22:35,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:22:35,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:22:35,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:22:35,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:22:35,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (1/1) ... [2022-12-13 21:22:35,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:22:35,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:22:35,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:22:35,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:22:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 21:22:35,321 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 21:22:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 21:22:35,321 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:22:35,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:22:35,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:22:35,324 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 21:22:35,451 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:22:35,453 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:22:35,858 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:22:35,868 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:22:35,869 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 21:22:35,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:22:35 BoogieIcfgContainer [2022-12-13 21:22:35,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:22:35,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:22:35,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:22:35,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:22:35,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:22:34" (1/3) ... [2022-12-13 21:22:35,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a562500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:22:35, skipping insertion in model container [2022-12-13 21:22:35,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:22:35" (2/3) ... [2022-12-13 21:22:35,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a562500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:22:35, skipping insertion in model container [2022-12-13 21:22:35,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:22:35" (3/3) ... [2022-12-13 21:22:35,879 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2022-12-13 21:22:35,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:22:35,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-12-13 21:22:35,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:22:36,036 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 21:22:36,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 352 transitions, 720 flow [2022-12-13 21:22:36,182 INFO L130 PetriNetUnfolder]: 15/350 cut-off events. [2022-12-13 21:22:36,183 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:22:36,191 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 21:22:36,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 352 transitions, 720 flow [2022-12-13 21:22:36,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 345 transitions, 702 flow [2022-12-13 21:22:36,203 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:22:36,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 345 transitions, 702 flow [2022-12-13 21:22:36,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 345 transitions, 702 flow [2022-12-13 21:22:36,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 345 transitions, 702 flow [2022-12-13 21:22:36,277 INFO L130 PetriNetUnfolder]: 15/345 cut-off events. [2022-12-13 21:22:36,278 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 21:22:36,281 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 21:22:36,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-12-13 21:22:50,052 INFO L134 LiptonReduction]: Checked pairs total: 108394 [2022-12-13 21:22:50,053 INFO L136 LiptonReduction]: Total number of compositions: 467 [2022-12-13 21:22:50,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:22:50,069 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;@52606f45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:22:50,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-12-13 21:22:50,070 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 21:22:50,070 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:22:50,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:50,071 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 21:22:50,071 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 21:22:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1497, now seen corresponding path program 1 times [2022-12-13 21:22:50,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:50,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205535488] [2022-12-13 21:22:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:50,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:22:50,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:50,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205535488] [2022-12-13 21:22:50,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205535488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:50,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:50,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 21:22:50,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126203484] [2022-12-13 21:22:50,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:22:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:22:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:22:50,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 819 [2022-12-13 21:22:50,187 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 21:22:50,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:50,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 819 [2022-12-13 21:22:50,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:51,233 INFO L130 PetriNetUnfolder]: 7699/12270 cut-off events. [2022-12-13 21:22:51,233 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 21:22:51,244 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 21:22:51,283 INFO L137 encePairwiseOnDemand]: 770/819 looper letters, 84 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2022-12-13 21:22:51,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 366 flow [2022-12-13 21:22:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:22:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 21:22:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 811 transitions. [2022-12-13 21:22:51,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49511599511599513 [2022-12-13 21:22:51,296 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 811 transitions. [2022-12-13 21:22:51,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 811 transitions. [2022-12-13 21:22:51,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:51,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 811 transitions. [2022-12-13 21:22:51,304 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 21:22:51,311 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 21:22:51,312 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 21:22:51,313 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 811 transitions. [2022-12-13 21:22:51,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 366 flow [2022-12-13 21:22:51,317 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 21:22:51,318 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2022-12-13 21:22:51,320 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 21:22:51,323 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2022-12-13 21:22:51,323 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2022-12-13 21:22:51,323 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 21:22:51,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:51,324 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:22:51,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:22:51,324 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 21:22:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:51,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1478930, now seen corresponding path program 1 times [2022-12-13 21:22:51,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:51,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778365076] [2022-12-13 21:22:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:51,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:51,549 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 21:22:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778365076] [2022-12-13 21:22:51,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778365076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:51,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:51,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:22:51,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949913974] [2022-12-13 21:22:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:51,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:22:51,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:22:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:22:51,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 819 [2022-12-13 21:22:51,704 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 21:22:51,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:51,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 819 [2022-12-13 21:22:51,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:52,493 INFO L130 PetriNetUnfolder]: 6887/10986 cut-off events. [2022-12-13 21:22:52,493 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 21:22:52,502 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 21:22:52,537 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 78 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-13 21:22:52,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 342 flow [2022-12-13 21:22:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:22:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:22:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1092 transitions. [2022-12-13 21:22:52,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2022-12-13 21:22:52,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1092 transitions. [2022-12-13 21:22:52,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1092 transitions. [2022-12-13 21:22:52,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:52,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1092 transitions. [2022-12-13 21:22:52,543 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 21:22:52,547 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 21:22:52,548 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 21:22:52,549 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1092 transitions. [2022-12-13 21:22:52,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 342 flow [2022-12-13 21:22:52,549 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 21:22:52,551 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2022-12-13 21:22:52,551 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 21:22:52,551 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2022-12-13 21:22:52,552 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2022-12-13 21:22:52,552 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 21:22:52,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:52,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:22:52,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:22:52,553 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 21:22:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1478929, now seen corresponding path program 1 times [2022-12-13 21:22:52,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:52,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170667384] [2022-12-13 21:22:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:52,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:52,680 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 21:22:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170667384] [2022-12-13 21:22:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170667384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:52,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:22:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248122438] [2022-12-13 21:22:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:22:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:22:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:22:52,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 819 [2022-12-13 21:22:52,823 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 21:22:52,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:52,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 819 [2022-12-13 21:22:52,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:53,467 INFO L130 PetriNetUnfolder]: 5958/9521 cut-off events. [2022-12-13 21:22:53,467 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 21:22:53,474 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 21:22:53,510 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 74 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2022-12-13 21:22:53,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 326 flow [2022-12-13 21:22:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:22:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:22:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1091 transitions. [2022-12-13 21:22:53,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44403744403744405 [2022-12-13 21:22:53,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1091 transitions. [2022-12-13 21:22:53,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1091 transitions. [2022-12-13 21:22:53,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:53,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1091 transitions. [2022-12-13 21:22:53,520 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 21:22:53,525 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 21:22:53,527 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 21:22:53,527 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1091 transitions. [2022-12-13 21:22:53,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 326 flow [2022-12-13 21:22:53,528 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 21:22:53,530 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2022-12-13 21:22:53,530 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 21:22:53,531 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2022-12-13 21:22:53,531 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2022-12-13 21:22:53,532 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 21:22:53,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:53,532 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:22:53,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:22:53,533 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 21:22:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1478894, now seen corresponding path program 1 times [2022-12-13 21:22:53,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031015035] [2022-12-13 21:22:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:53,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:53,605 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 21:22:53,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031015035] [2022-12-13 21:22:53,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031015035] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:53,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:53,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:22:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909917879] [2022-12-13 21:22:53,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:22:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:53,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:22:53,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:22:53,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 21:22:53,721 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 21:22:53,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:53,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 21:22:53,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:54,369 INFO L130 PetriNetUnfolder]: 5897/9399 cut-off events. [2022-12-13 21:22:54,369 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 21:22:54,376 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 21:22:54,404 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 71 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2022-12-13 21:22:54,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 316 flow [2022-12-13 21:22:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:22:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:22:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2022-12-13 21:22:54,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43833943833943834 [2022-12-13 21:22:54,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2022-12-13 21:22:54,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2022-12-13 21:22:54,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:54,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2022-12-13 21:22:54,411 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 21:22:54,415 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 21:22:54,417 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 21:22:54,417 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1077 transitions. [2022-12-13 21:22:54,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 316 flow [2022-12-13 21:22:54,418 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 21:22:54,419 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2022-12-13 21:22:54,420 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 21:22:54,420 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2022-12-13 21:22:54,421 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2022-12-13 21:22:54,421 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 21:22:54,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:54,422 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 21:22:54,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 21:22:54,422 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 21:22:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1478893, now seen corresponding path program 1 times [2022-12-13 21:22:54,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116511404] [2022-12-13 21:22:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:54,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:54,458 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 21:22:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:54,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116511404] [2022-12-13 21:22:54,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116511404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:54,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:54,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:22:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107471191] [2022-12-13 21:22:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:22:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:22:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:22:54,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 819 [2022-12-13 21:22:54,586 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 21:22:54,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:54,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 819 [2022-12-13 21:22:54,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:55,267 INFO L130 PetriNetUnfolder]: 5836/9277 cut-off events. [2022-12-13 21:22:55,267 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 21:22:55,275 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 21:22:55,299 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 69 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-12-13 21:22:55,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 311 flow [2022-12-13 21:22:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:22:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:22:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2022-12-13 21:22:55,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326414326414326 [2022-12-13 21:22:55,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2022-12-13 21:22:55,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2022-12-13 21:22:55,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:55,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2022-12-13 21:22:55,304 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 21:22:55,308 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 21:22:55,309 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 21:22:55,309 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1063 transitions. [2022-12-13 21:22:55,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 311 flow [2022-12-13 21:22:55,310 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 21:22:55,311 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2022-12-13 21:22:55,311 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 21:22:55,312 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2022-12-13 21:22:55,312 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2022-12-13 21:22:55,313 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 21:22:55,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:55,313 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:22:55,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:22:55,313 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 21:22:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash 45846359, now seen corresponding path program 1 times [2022-12-13 21:22:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:55,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800056425] [2022-12-13 21:22:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:55,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:22:55,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800056425] [2022-12-13 21:22:55,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800056425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:55,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:55,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:22:55,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144726753] [2022-12-13 21:22:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:55,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:22:55,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:22:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:22:56,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 819 [2022-12-13 21:22:56,321 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 21:22:56,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:56,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 819 [2022-12-13 21:22:56,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:57,036 INFO L130 PetriNetUnfolder]: 6145/9677 cut-off events. [2022-12-13 21:22:57,036 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 21:22:57,044 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 21:22:57,063 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 74 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-12-13 21:22:57,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 335 flow [2022-12-13 21:22:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:22:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:22:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2022-12-13 21:22:57,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42653642653642654 [2022-12-13 21:22:57,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2022-12-13 21:22:57,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2022-12-13 21:22:57,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:57,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2022-12-13 21:22:57,068 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 21:22:57,070 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 21:22:57,071 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 21:22:57,071 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 3 states and 1048 transitions. [2022-12-13 21:22:57,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 335 flow [2022-12-13 21:22:57,072 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 21:22:57,073 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 191 flow [2022-12-13 21:22:57,073 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 21:22:57,074 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -59 predicate places. [2022-12-13 21:22:57,074 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 191 flow [2022-12-13 21:22:57,075 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 21:22:57,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:57,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:22:57,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:22:57,075 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 21:22:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1421237092, now seen corresponding path program 1 times [2022-12-13 21:22:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462980304] [2022-12-13 21:22:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:57,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:57,442 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 21:22:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462980304] [2022-12-13 21:22:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462980304] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:57,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:57,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:22:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371811285] [2022-12-13 21:22:57,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:57,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:22:57,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:22:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:22:57,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 819 [2022-12-13 21:22:57,695 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 21:22:57,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:57,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 819 [2022-12-13 21:22:57,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:58,381 INFO L130 PetriNetUnfolder]: 6367/9978 cut-off events. [2022-12-13 21:22:58,381 INFO L131 PetriNetUnfolder]: For 278/278 co-relation queries the response was YES. [2022-12-13 21:22:58,388 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 21:22:58,404 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 90 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2022-12-13 21:22:58,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 103 transitions, 428 flow [2022-12-13 21:22:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:22:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:22:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2022-12-13 21:22:58,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4281644281644282 [2022-12-13 21:22:58,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2022-12-13 21:22:58,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2022-12-13 21:22:58,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:58,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2022-12-13 21:22:58,408 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 21:22:58,410 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 21:22:58,411 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 21:22:58,411 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 191 flow. Second operand 3 states and 1052 transitions. [2022-12-13 21:22:58,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 103 transitions, 428 flow [2022-12-13 21:22:58,411 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 21:22:58,412 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 223 flow [2022-12-13 21:22:58,412 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 21:22:58,413 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2022-12-13 21:22:58,413 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 223 flow [2022-12-13 21:22:58,413 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 21:22:58,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:58,413 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:22:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 21:22:58,414 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 21:22:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1421235558, now seen corresponding path program 1 times [2022-12-13 21:22:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988331587] [2022-12-13 21:22:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:58,538 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 21:22:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:58,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988331587] [2022-12-13 21:22:58,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988331587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:58,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:58,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:22:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440429491] [2022-12-13 21:22:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:22:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:22:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:22:58,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 819 [2022-12-13 21:22:58,817 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 21:22:58,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:58,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 819 [2022-12-13 21:22:58,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:22:59,469 INFO L130 PetriNetUnfolder]: 5498/8729 cut-off events. [2022-12-13 21:22:59,470 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-12-13 21:22:59,477 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 21:22:59,491 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 94 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2022-12-13 21:22:59,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 455 flow [2022-12-13 21:22:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:22:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:22:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1370 transitions. [2022-12-13 21:22:59,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4181929181929182 [2022-12-13 21:22:59,495 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1370 transitions. [2022-12-13 21:22:59,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1370 transitions. [2022-12-13 21:22:59,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:22:59,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1370 transitions. [2022-12-13 21:22:59,498 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 21:22:59,502 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 21:22:59,503 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 21:22:59,503 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 223 flow. Second operand 4 states and 1370 transitions. [2022-12-13 21:22:59,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 455 flow [2022-12-13 21:22:59,505 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 21:22:59,506 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 199 flow [2022-12-13 21:22:59,506 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 21:22:59,507 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -59 predicate places. [2022-12-13 21:22:59,507 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 199 flow [2022-12-13 21:22:59,508 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 21:22:59,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:22:59,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:22:59,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:22:59,508 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 21:22:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:22:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1421250442, now seen corresponding path program 1 times [2022-12-13 21:22:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:22:59,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842334707] [2022-12-13 21:22:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:22:59,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:22:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:22:59,581 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 21:22:59,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:22:59,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842334707] [2022-12-13 21:22:59,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842334707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:22:59,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:22:59,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:22:59,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637503690] [2022-12-13 21:22:59,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:22:59,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:22:59,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:22:59,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:22:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:22:59,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 819 [2022-12-13 21:22:59,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 333.25) internal successors, (1333), 4 states have internal predecessors, (1333), 0 states have call successors, (0), 0 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 21:22:59,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:22:59,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 819 [2022-12-13 21:22:59,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:00,281 INFO L130 PetriNetUnfolder]: 3961/6470 cut-off events. [2022-12-13 21:23:00,281 INFO L131 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2022-12-13 21:23:00,292 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 21:23:00,315 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 66 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-12-13 21:23:00,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 333 flow [2022-12-13 21:23:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2022-12-13 21:23:00,318 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326414326414326 [2022-12-13 21:23:00,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2022-12-13 21:23:00,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2022-12-13 21:23:00,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:00,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2022-12-13 21:23:00,322 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 21:23:00,326 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 21:23:00,327 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 21:23:00,327 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 199 flow. Second operand 3 states and 1063 transitions. [2022-12-13 21:23:00,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 333 flow [2022-12-13 21:23:00,329 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 21:23:00,330 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 197 flow [2022-12-13 21:23:00,330 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 21:23:00,331 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2022-12-13 21:23:00,331 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 197 flow [2022-12-13 21:23:00,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 333.25) internal successors, (1333), 4 states have internal predecessors, (1333), 0 states have call successors, (0), 0 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 21:23:00,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:00,332 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:23:00,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 21:23:00,333 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 21:23:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1421250440, now seen corresponding path program 1 times [2022-12-13 21:23:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:00,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628184861] [2022-12-13 21:23:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:00,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:00,404 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 21:23:00,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628184861] [2022-12-13 21:23:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628184861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:00,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:00,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:23:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078140890] [2022-12-13 21:23:00,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:23:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:23:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:23:00,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 819 [2022-12-13 21:23:00,589 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 21:23:00,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:00,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 819 [2022-12-13 21:23:00,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:00,933 INFO L130 PetriNetUnfolder]: 2447/4158 cut-off events. [2022-12-13 21:23:00,933 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-12-13 21:23:00,937 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 21:23:00,944 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 65 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 21:23:00,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 329 flow [2022-12-13 21:23:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2022-12-13 21:23:00,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2022-12-13 21:23:00,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2022-12-13 21:23:00,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2022-12-13 21:23:00,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:00,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2022-12-13 21:23:00,948 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 21:23:00,949 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 21:23:00,950 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 21:23:00,950 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 197 flow. Second operand 3 states and 1044 transitions. [2022-12-13 21:23:00,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 329 flow [2022-12-13 21:23:00,951 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 21:23:00,952 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 195 flow [2022-12-13 21:23:00,952 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 21:23:00,953 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -61 predicate places. [2022-12-13 21:23:00,953 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 195 flow [2022-12-13 21:23:00,953 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 21:23:00,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:00,954 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:00,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 21:23:00,954 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 21:23:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash 687349316, now seen corresponding path program 1 times [2022-12-13 21:23:00,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:00,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036973701] [2022-12-13 21:23:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:01,009 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 21:23:01,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036973701] [2022-12-13 21:23:01,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036973701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:01,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:01,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:23:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254871443] [2022-12-13 21:23:01,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:01,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:01,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 21:23:01,018 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 21:23:01,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:01,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 21:23:01,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:01,315 INFO L130 PetriNetUnfolder]: 1728/2984 cut-off events. [2022-12-13 21:23:01,315 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-12-13 21:23:01,318 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 21:23:01,323 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 92 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2022-12-13 21:23:01,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 433 flow [2022-12-13 21:23:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1097 transitions. [2022-12-13 21:23:01,325 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4464794464794465 [2022-12-13 21:23:01,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1097 transitions. [2022-12-13 21:23:01,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1097 transitions. [2022-12-13 21:23:01,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:01,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1097 transitions. [2022-12-13 21:23:01,326 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 21:23:01,328 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 21:23:01,329 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 21:23:01,329 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 195 flow. Second operand 3 states and 1097 transitions. [2022-12-13 21:23:01,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 433 flow [2022-12-13 21:23:01,330 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 21:23:01,332 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 181 flow [2022-12-13 21:23:01,332 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 21:23:01,332 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -63 predicate places. [2022-12-13 21:23:01,332 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 181 flow [2022-12-13 21:23:01,332 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 21:23:01,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:01,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:01,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:23:01,333 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 21:23:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1200827140, now seen corresponding path program 1 times [2022-12-13 21:23:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:01,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420236659] [2022-12-13 21:23:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:01,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:01,390 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 21:23:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:01,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420236659] [2022-12-13 21:23:01,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420236659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:01,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:01,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:23:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553017307] [2022-12-13 21:23:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:01,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 819 [2022-12-13 21:23:01,495 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 21:23:01,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:01,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 819 [2022-12-13 21:23:01,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:01,718 INFO L130 PetriNetUnfolder]: 1562/2703 cut-off events. [2022-12-13 21:23:01,718 INFO L131 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2022-12-13 21:23:01,721 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 11602 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 21:23:01,725 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-12-13 21:23:01,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 299 flow [2022-12-13 21:23:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1054 transitions. [2022-12-13 21:23:01,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42897842897842897 [2022-12-13 21:23:01,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1054 transitions. [2022-12-13 21:23:01,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1054 transitions. [2022-12-13 21:23:01,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:01,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1054 transitions. [2022-12-13 21:23:01,729 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 21:23:01,730 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 21:23:01,731 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 21:23:01,731 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 181 flow. Second operand 3 states and 1054 transitions. [2022-12-13 21:23:01,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 299 flow [2022-12-13 21:23:01,732 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 21:23:01,733 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 176 flow [2022-12-13 21:23:01,734 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 21:23:01,734 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -65 predicate places. [2022-12-13 21:23:01,734 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 176 flow [2022-12-13 21:23:01,735 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 21:23:01,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:01,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:01,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 21:23:01,735 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 21:23:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1200827139, now seen corresponding path program 1 times [2022-12-13 21:23:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:01,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113534929] [2022-12-13 21:23:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:01,858 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 21:23:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:01,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113534929] [2022-12-13 21:23:01,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113534929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:01,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:01,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:23:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21501652] [2022-12-13 21:23:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:01,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 819 [2022-12-13 21:23:01,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 176 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 21:23:01,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:01,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 819 [2022-12-13 21:23:01,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:02,199 INFO L130 PetriNetUnfolder]: 1545/2674 cut-off events. [2022-12-13 21:23:02,199 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-12-13 21:23:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 2674 events. 1545/2674 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11463 event pairs, 1211 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 5348. Up to 2482 conditions per place. [2022-12-13 21:23:02,205 INFO L137 encePairwiseOnDemand]: 817/819 looper letters, 60 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-12-13 21:23:02,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 296 flow [2022-12-13 21:23:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1072 transitions. [2022-12-13 21:23:02,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4363044363044363 [2022-12-13 21:23:02,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1072 transitions. [2022-12-13 21:23:02,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1072 transitions. [2022-12-13 21:23:02,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:02,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1072 transitions. [2022-12-13 21:23:02,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.3333333333333) internal successors, (1072), 3 states have internal predecessors, (1072), 0 states have call successors, (0), 0 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 21:23:02,210 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 21:23:02,210 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 21:23:02,210 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 176 flow. Second operand 3 states and 1072 transitions. [2022-12-13 21:23:02,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 296 flow [2022-12-13 21:23:02,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:23:02,212 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 172 flow [2022-12-13 21:23:02,212 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2022-12-13 21:23:02,212 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -66 predicate places. [2022-12-13 21:23:02,212 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 172 flow [2022-12-13 21:23:02,212 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 21:23:02,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:02,212 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:02,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 21:23:02,213 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:02,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1429062817, now seen corresponding path program 1 times [2022-12-13 21:23:02,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:02,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244238673] [2022-12-13 21:23:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:02,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:02,238 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 21:23:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:02,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244238673] [2022-12-13 21:23:02,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244238673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:02,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:02,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:02,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570673080] [2022-12-13 21:23:02,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:02,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:02,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:02,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:02,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:02,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 21:23:02,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 172 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 21:23:02,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:02,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 21:23:02,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:02,531 INFO L130 PetriNetUnfolder]: 1533/2662 cut-off events. [2022-12-13 21:23:02,531 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-12-13 21:23:02,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5328 conditions, 2662 events. 1533/2662 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11450 event pairs, 1197 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 5322. Up to 2430 conditions per place. [2022-12-13 21:23:02,538 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 65 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2022-12-13 21:23:02,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 325 flow [2022-12-13 21:23:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2022-12-13 21:23:02,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4354904354904355 [2022-12-13 21:23:02,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2022-12-13 21:23:02,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2022-12-13 21:23:02,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:02,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2022-12-13 21:23:02,541 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 21:23:02,543 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 21:23:02,543 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 21:23:02,543 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 172 flow. Second operand 3 states and 1070 transitions. [2022-12-13 21:23:02,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 325 flow [2022-12-13 21:23:02,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:02,544 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 175 flow [2022-12-13 21:23:02,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2022-12-13 21:23:02,545 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -65 predicate places. [2022-12-13 21:23:02,545 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 175 flow [2022-12-13 21:23:02,545 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 21:23:02,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:02,545 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:02,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 21:23:02,545 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 21:23:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1061468300, now seen corresponding path program 1 times [2022-12-13 21:23:02,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:02,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534202439] [2022-12-13 21:23:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:02,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:03,025 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 21:23:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534202439] [2022-12-13 21:23:03,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534202439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:03,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:03,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:23:03,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846786590] [2022-12-13 21:23:03,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:23:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:23:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:23:03,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 819 [2022-12-13 21:23:03,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 316.4) internal successors, (1582), 5 states have internal predecessors, (1582), 0 states have call successors, (0), 0 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 21:23:03,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:03,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 819 [2022-12-13 21:23:03,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:04,158 INFO L130 PetriNetUnfolder]: 1631/2801 cut-off events. [2022-12-13 21:23:04,158 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-12-13 21:23:04,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5683 conditions, 2801 events. 1631/2801 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11855 event pairs, 1287 based on Foata normal form. 0/2214 useless extension candidates. Maximal degree in co-relation 5677. Up to 2625 conditions per place. [2022-12-13 21:23:04,165 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 64 selfloop transitions, 9 changer transitions 0/81 dead transitions. [2022-12-13 21:23:04,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 350 flow [2022-12-13 21:23:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:23:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:23:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1958 transitions. [2022-12-13 21:23:04,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39845339845339844 [2022-12-13 21:23:04,168 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1958 transitions. [2022-12-13 21:23:04,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1958 transitions. [2022-12-13 21:23:04,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:04,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1958 transitions. [2022-12-13 21:23:04,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.3333333333333) internal successors, (1958), 6 states have internal predecessors, (1958), 0 states have call successors, (0), 0 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 21:23:04,173 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 21:23:04,173 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 21:23:04,173 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 175 flow. Second operand 6 states and 1958 transitions. [2022-12-13 21:23:04,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 350 flow [2022-12-13 21:23:04,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:23:04,175 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 225 flow [2022-12-13 21:23:04,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=225, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-12-13 21:23:04,175 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -59 predicate places. [2022-12-13 21:23:04,175 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 225 flow [2022-12-13 21:23:04,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.4) internal successors, (1582), 5 states have internal predecessors, (1582), 0 states have call successors, (0), 0 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 21:23:04,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:04,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:04,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 21:23:04,176 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 21:23:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1953114911, now seen corresponding path program 1 times [2022-12-13 21:23:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:04,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689546243] [2022-12-13 21:23:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:04,491 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 21:23:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689546243] [2022-12-13 21:23:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689546243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:04,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:04,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:23:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434877967] [2022-12-13 21:23:04,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:04,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:23:04,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:23:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:23:05,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 819 [2022-12-13 21:23:05,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 310.85714285714283) internal successors, (2176), 7 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 21:23:05,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:05,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 819 [2022-12-13 21:23:05,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:05,458 INFO L130 PetriNetUnfolder]: 1727/2959 cut-off events. [2022-12-13 21:23:05,458 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-12-13 21:23:05,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6111 conditions, 2959 events. 1727/2959 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 12637 event pairs, 473 based on Foata normal form. 11/2384 useless extension candidates. Maximal degree in co-relation 6102. Up to 2563 conditions per place. [2022-12-13 21:23:05,466 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 90 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2022-12-13 21:23:05,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 509 flow [2022-12-13 21:23:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:23:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:23:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1954 transitions. [2022-12-13 21:23:05,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39763939763939765 [2022-12-13 21:23:05,471 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1954 transitions. [2022-12-13 21:23:05,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1954 transitions. [2022-12-13 21:23:05,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:05,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1954 transitions. [2022-12-13 21:23:05,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.6666666666667) internal successors, (1954), 6 states have internal predecessors, (1954), 0 states have call successors, (0), 0 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 21:23:05,485 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 21:23:05,485 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 21:23:05,485 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 225 flow. Second operand 6 states and 1954 transitions. [2022-12-13 21:23:05,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 509 flow [2022-12-13 21:23:05,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 501 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:05,489 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 271 flow [2022-12-13 21:23:05,489 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 21:23:05,489 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -53 predicate places. [2022-12-13 21:23:05,490 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 271 flow [2022-12-13 21:23:05,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 310.85714285714283) internal successors, (2176), 7 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 21:23:05,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:05,490 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:05,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 21:23:05,490 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 21:23:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2052465897, now seen corresponding path program 2 times [2022-12-13 21:23:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:05,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771303909] [2022-12-13 21:23:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:05,848 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 21:23:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771303909] [2022-12-13 21:23:05,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771303909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:05,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:05,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:23:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184549719] [2022-12-13 21:23:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:23:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:23:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:23:06,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 819 [2022-12-13 21:23:06,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 310.85714285714283) internal successors, (2176), 7 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 21:23:06,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:06,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 819 [2022-12-13 21:23:06,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:06,969 INFO L130 PetriNetUnfolder]: 1987/3411 cut-off events. [2022-12-13 21:23:06,969 INFO L131 PetriNetUnfolder]: For 398/398 co-relation queries the response was YES. [2022-12-13 21:23:06,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7196 conditions, 3411 events. 1987/3411 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15312 event pairs, 559 based on Foata normal form. 11/2736 useless extension candidates. Maximal degree in co-relation 7184. Up to 2540 conditions per place. [2022-12-13 21:23:06,978 INFO L137 encePairwiseOnDemand]: 804/819 looper letters, 121 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2022-12-13 21:23:06,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 154 transitions, 734 flow [2022-12-13 21:23:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2922 transitions. [2022-12-13 21:23:06,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39641839641839643 [2022-12-13 21:23:06,982 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2922 transitions. [2022-12-13 21:23:06,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2922 transitions. [2022-12-13 21:23:06,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:06,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2922 transitions. [2022-12-13 21:23:06,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 324.6666666666667) internal successors, (2922), 9 states have internal predecessors, (2922), 0 states have call successors, (0), 0 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 21:23:06,989 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 21:23:06,990 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 21:23:06,990 INFO L175 Difference]: Start difference. First operand has 86 places, 80 transitions, 271 flow. Second operand 9 states and 2922 transitions. [2022-12-13 21:23:06,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 154 transitions, 734 flow [2022-12-13 21:23:06,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 718 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:06,993 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 384 flow [2022-12-13 21:23:06,993 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=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=384, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2022-12-13 21:23:06,993 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -44 predicate places. [2022-12-13 21:23:06,993 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 384 flow [2022-12-13 21:23:06,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 310.85714285714283) internal successors, (2176), 7 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 21:23:06,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:06,994 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:06,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 21:23:06,994 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 21:23:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash 239876057, now seen corresponding path program 3 times [2022-12-13 21:23:06,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:06,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416608462] [2022-12-13 21:23:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:07,333 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 21:23:07,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:07,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416608462] [2022-12-13 21:23:07,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416608462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:07,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:07,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:23:07,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022976850] [2022-12-13 21:23:07,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:23:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:23:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:23:07,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 819 [2022-12-13 21:23:07,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 310.85714285714283) internal successors, (2176), 7 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 21:23:07,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:07,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 819 [2022-12-13 21:23:07,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:08,374 INFO L130 PetriNetUnfolder]: 1980/3422 cut-off events. [2022-12-13 21:23:08,374 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2022-12-13 21:23:08,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7773 conditions, 3422 events. 1980/3422 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15253 event pairs, 1509 based on Foata normal form. 11/2911 useless extension candidates. Maximal degree in co-relation 7760. Up to 3070 conditions per place. [2022-12-13 21:23:08,385 INFO L137 encePairwiseOnDemand]: 812/819 looper letters, 80 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2022-12-13 21:23:08,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 579 flow [2022-12-13 21:23:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:23:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:23:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1933 transitions. [2022-12-13 21:23:08,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3933658933658934 [2022-12-13 21:23:08,388 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1933 transitions. [2022-12-13 21:23:08,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1933 transitions. [2022-12-13 21:23:08,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:08,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1933 transitions. [2022-12-13 21:23:08,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 322.1666666666667) internal successors, (1933), 6 states have internal predecessors, (1933), 0 states have call successors, (0), 0 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 21:23:08,392 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 21:23:08,393 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 21:23:08,393 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 384 flow. Second operand 6 states and 1933 transitions. [2022-12-13 21:23:08,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 579 flow [2022-12-13 21:23:08,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 98 transitions, 534 flow, removed 5 selfloop flow, removed 7 redundant places. [2022-12-13 21:23:08,396 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 355 flow [2022-12-13 21:23:08,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2022-12-13 21:23:08,396 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -46 predicate places. [2022-12-13 21:23:08,396 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 355 flow [2022-12-13 21:23:08,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 310.85714285714283) internal successors, (2176), 7 states have internal predecessors, (2176), 0 states have call successors, (0), 0 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 21:23:08,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:08,397 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 21:23:08,397 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 21:23:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1368654793, now seen corresponding path program 1 times [2022-12-13 21:23:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:08,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116653838] [2022-12-13 21:23:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:08,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:08,983 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 21:23:08,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:08,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116653838] [2022-12-13 21:23:08,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116653838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:08,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:08,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 21:23:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008459329] [2022-12-13 21:23:08,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 21:23:08,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 21:23:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 21:23:09,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 819 [2022-12-13 21:23:09,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 355 flow. Second operand has 9 states, 9 states have (on average 303.44444444444446) internal successors, (2731), 9 states have internal predecessors, (2731), 0 states have call successors, (0), 0 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 21:23:09,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:09,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 819 [2022-12-13 21:23:09,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:10,519 INFO L130 PetriNetUnfolder]: 1979/3413 cut-off events. [2022-12-13 21:23:10,519 INFO L131 PetriNetUnfolder]: For 900/900 co-relation queries the response was YES. [2022-12-13 21:23:10,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7702 conditions, 3413 events. 1979/3413 cut-off events. For 900/900 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15193 event pairs, 1497 based on Foata normal form. 0/2892 useless extension candidates. Maximal degree in co-relation 7688. Up to 3200 conditions per place. [2022-12-13 21:23:10,530 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 83 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2022-12-13 21:23:10,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 106 transitions, 614 flow [2022-12-13 21:23:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:23:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:23:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2502 transitions. [2022-12-13 21:23:10,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38186813186813184 [2022-12-13 21:23:10,534 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2502 transitions. [2022-12-13 21:23:10,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2502 transitions. [2022-12-13 21:23:10,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:10,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2502 transitions. [2022-12-13 21:23:10,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 312.75) internal successors, (2502), 8 states have internal predecessors, (2502), 0 states have call successors, (0), 0 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 21:23:10,539 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 21:23:10,540 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 21:23:10,540 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 355 flow. Second operand 8 states and 2502 transitions. [2022-12-13 21:23:10,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 106 transitions, 614 flow [2022-12-13 21:23:10,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 598 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 21:23:10,543 INFO L231 Difference]: Finished difference. Result has 99 places, 94 transitions, 427 flow [2022-12-13 21:23:10,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=99, PETRI_TRANSITIONS=94} [2022-12-13 21:23:10,543 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -40 predicate places. [2022-12-13 21:23:10,543 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 94 transitions, 427 flow [2022-12-13 21:23:10,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 303.44444444444446) internal successors, (2731), 9 states have internal predecessors, (2731), 0 states have call successors, (0), 0 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 21:23:10,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:10,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:10,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 21:23:10,544 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 21:23:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash 502586372, now seen corresponding path program 1 times [2022-12-13 21:23:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:10,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067331471] [2022-12-13 21:23:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:11,127 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 21:23:11,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:11,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067331471] [2022-12-13 21:23:11,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067331471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:11,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:11,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 21:23:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883285792] [2022-12-13 21:23:11,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:11,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:12,747 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 819 [2022-12-13 21:23:12,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 94 transitions, 427 flow. Second operand has 11 states, 11 states have (on average 295.27272727272725) internal successors, (3248), 11 states have internal predecessors, (3248), 0 states have call successors, (0), 0 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 21:23:12,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:12,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 819 [2022-12-13 21:23:12,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:13,517 INFO L130 PetriNetUnfolder]: 2240/3860 cut-off events. [2022-12-13 21:23:13,517 INFO L131 PetriNetUnfolder]: For 1121/1121 co-relation queries the response was YES. [2022-12-13 21:23:13,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8884 conditions, 3860 events. 2240/3860 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 17757 event pairs, 833 based on Foata normal form. 0/3278 useless extension candidates. Maximal degree in co-relation 8867. Up to 2938 conditions per place. [2022-12-13 21:23:13,529 INFO L137 encePairwiseOnDemand]: 808/819 looper letters, 130 selfloop transitions, 25 changer transitions 0/163 dead transitions. [2022-12-13 21:23:13,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 904 flow [2022-12-13 21:23:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2783 transitions. [2022-12-13 21:23:13,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37756071089404425 [2022-12-13 21:23:13,533 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2783 transitions. [2022-12-13 21:23:13,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2783 transitions. [2022-12-13 21:23:13,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:13,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2783 transitions. [2022-12-13 21:23:13,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 309.22222222222223) internal successors, (2783), 9 states have internal predecessors, (2783), 0 states have call successors, (0), 0 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 21:23:13,539 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 21:23:13,539 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 21:23:13,539 INFO L175 Difference]: Start difference. First operand has 99 places, 94 transitions, 427 flow. Second operand 9 states and 2783 transitions. [2022-12-13 21:23:13,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 904 flow [2022-12-13 21:23:13,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 163 transitions, 883 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 21:23:13,543 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 521 flow [2022-12-13 21:23:13,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=521, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2022-12-13 21:23:13,544 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -31 predicate places. [2022-12-13 21:23:13,544 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 521 flow [2022-12-13 21:23:13,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 295.27272727272725) internal successors, (3248), 11 states have internal predecessors, (3248), 0 states have call successors, (0), 0 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 21:23:13,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:13,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:13,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 21:23:13,544 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 21:23:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -252880030, now seen corresponding path program 2 times [2022-12-13 21:23:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145337939] [2022-12-13 21:23:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:13,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:14,094 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 21:23:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145337939] [2022-12-13 21:23:14,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145337939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:14,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:14,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 21:23:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243142040] [2022-12-13 21:23:14,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:16,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 819 [2022-12-13 21:23:16,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 521 flow. Second operand has 11 states, 11 states have (on average 298.27272727272725) internal successors, (3281), 11 states have internal predecessors, (3281), 0 states have call successors, (0), 0 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 21:23:16,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:16,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 819 [2022-12-13 21:23:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:17,061 INFO L130 PetriNetUnfolder]: 2485/4288 cut-off events. [2022-12-13 21:23:17,061 INFO L131 PetriNetUnfolder]: For 1801/1801 co-relation queries the response was YES. [2022-12-13 21:23:17,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10267 conditions, 4288 events. 2485/4288 cut-off events. For 1801/1801 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 20361 event pairs, 1639 based on Foata normal form. 0/3639 useless extension candidates. Maximal degree in co-relation 10245. Up to 3352 conditions per place. [2022-12-13 21:23:17,077 INFO L137 encePairwiseOnDemand]: 807/819 looper letters, 125 selfloop transitions, 26 changer transitions 0/159 dead transitions. [2022-12-13 21:23:17,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 984 flow [2022-12-13 21:23:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 21:23:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 21:23:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3402 transitions. [2022-12-13 21:23:17,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3776223776223776 [2022-12-13 21:23:17,080 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3402 transitions. [2022-12-13 21:23:17,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3402 transitions. [2022-12-13 21:23:17,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:17,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3402 transitions. [2022-12-13 21:23:17,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 309.27272727272725) internal successors, (3402), 11 states have internal predecessors, (3402), 0 states have call successors, (0), 0 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 21:23:17,088 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 21:23:17,088 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 21:23:17,089 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 521 flow. Second operand 11 states and 3402 transitions. [2022-12-13 21:23:17,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 984 flow [2022-12-13 21:23:17,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 943 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-13 21:23:17,095 INFO L231 Difference]: Finished difference. Result has 118 places, 105 transitions, 607 flow [2022-12-13 21:23:17,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=607, PETRI_PLACES=118, PETRI_TRANSITIONS=105} [2022-12-13 21:23:17,095 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -21 predicate places. [2022-12-13 21:23:17,095 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 105 transitions, 607 flow [2022-12-13 21:23:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 298.27272727272725) internal successors, (3281), 11 states have internal predecessors, (3281), 0 states have call successors, (0), 0 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 21:23:17,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:17,096 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 21:23:17,096 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 21:23:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1093986034, now seen corresponding path program 3 times [2022-12-13 21:23:17,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:17,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788261910] [2022-12-13 21:23:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:17,692 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 21:23:17,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:17,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788261910] [2022-12-13 21:23:17,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788261910] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:17,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:17,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 21:23:17,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973549723] [2022-12-13 21:23:17,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:19,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 819 [2022-12-13 21:23:19,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 105 transitions, 607 flow. Second operand has 11 states, 11 states have (on average 295.27272727272725) internal successors, (3248), 11 states have internal predecessors, (3248), 0 states have call successors, (0), 0 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 21:23:19,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:19,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 819 [2022-12-13 21:23:19,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:20,279 INFO L130 PetriNetUnfolder]: 2879/4983 cut-off events. [2022-12-13 21:23:20,279 INFO L131 PetriNetUnfolder]: For 2215/2215 co-relation queries the response was YES. [2022-12-13 21:23:20,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12033 conditions, 4983 events. 2879/4983 cut-off events. For 2215/2215 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 25131 event pairs, 1777 based on Foata normal form. 0/4218 useless extension candidates. Maximal degree in co-relation 12007. Up to 3824 conditions per place. [2022-12-13 21:23:20,299 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 124 selfloop transitions, 24 changer transitions 0/156 dead transitions. [2022-12-13 21:23:20,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 156 transitions, 1051 flow [2022-12-13 21:23:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:23:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:23:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2470 transitions. [2022-12-13 21:23:20,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2022-12-13 21:23:20,302 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2470 transitions. [2022-12-13 21:23:20,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2470 transitions. [2022-12-13 21:23:20,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:20,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2470 transitions. [2022-12-13 21:23:20,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 308.75) internal successors, (2470), 8 states have internal predecessors, (2470), 0 states have call successors, (0), 0 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 21:23:20,307 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 21:23:20,308 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 21:23:20,308 INFO L175 Difference]: Start difference. First operand has 118 places, 105 transitions, 607 flow. Second operand 8 states and 2470 transitions. [2022-12-13 21:23:20,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 156 transitions, 1051 flow [2022-12-13 21:23:20,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 156 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-12-13 21:23:20,317 INFO L231 Difference]: Finished difference. Result has 122 places, 112 transitions, 703 flow [2022-12-13 21:23:20,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=703, PETRI_PLACES=122, PETRI_TRANSITIONS=112} [2022-12-13 21:23:20,317 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -17 predicate places. [2022-12-13 21:23:20,317 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 112 transitions, 703 flow [2022-12-13 21:23:20,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 295.27272727272725) internal successors, (3248), 11 states have internal predecessors, (3248), 0 states have call successors, (0), 0 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 21:23:20,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:20,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:20,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 21:23:20,318 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash 521814410, now seen corresponding path program 4 times [2022-12-13 21:23:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252122483] [2022-12-13 21:23:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:21,011 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 21:23:21,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252122483] [2022-12-13 21:23:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252122483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:21,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:21,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 21:23:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116339807] [2022-12-13 21:23:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:21,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:21,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:23,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 819 [2022-12-13 21:23:23,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 112 transitions, 703 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 21:23:23,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:23,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 819 [2022-12-13 21:23:23,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:25,674 INFO L130 PetriNetUnfolder]: 2974/5178 cut-off events. [2022-12-13 21:23:25,674 INFO L131 PetriNetUnfolder]: For 2705/2705 co-relation queries the response was YES. [2022-12-13 21:23:25,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12692 conditions, 5178 events. 2974/5178 cut-off events. For 2705/2705 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 26523 event pairs, 1918 based on Foata normal form. 0/4377 useless extension candidates. Maximal degree in co-relation 12664. Up to 3608 conditions per place. [2022-12-13 21:23:25,692 INFO L137 encePairwiseOnDemand]: 807/819 looper letters, 122 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2022-12-13 21:23:25,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 158 transitions, 1119 flow [2022-12-13 21:23:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 21:23:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 21:23:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3070 transitions. [2022-12-13 21:23:25,695 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37484737484737485 [2022-12-13 21:23:25,695 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3070 transitions. [2022-12-13 21:23:25,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3070 transitions. [2022-12-13 21:23:25,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:25,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3070 transitions. [2022-12-13 21:23:25,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 307.0) internal successors, (3070), 10 states have internal predecessors, (3070), 0 states have call successors, (0), 0 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 21:23:25,702 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 21:23:25,703 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 21:23:25,703 INFO L175 Difference]: Start difference. First operand has 122 places, 112 transitions, 703 flow. Second operand 10 states and 3070 transitions. [2022-12-13 21:23:25,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 158 transitions, 1119 flow [2022-12-13 21:23:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 158 transitions, 1086 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 21:23:25,714 INFO L231 Difference]: Finished difference. Result has 128 places, 115 transitions, 779 flow [2022-12-13 21:23:25,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=128, PETRI_TRANSITIONS=115} [2022-12-13 21:23:25,714 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2022-12-13 21:23:25,714 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 115 transitions, 779 flow [2022-12-13 21:23:25,715 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 21:23:25,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:25,715 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:23:25,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 21:23:25,715 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash 521324300, now seen corresponding path program 5 times [2022-12-13 21:23:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:25,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374310368] [2022-12-13 21:23:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:25,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:26,215 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 21:23:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:26,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374310368] [2022-12-13 21:23:26,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374310368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:26,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:26,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 21:23:26,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532425586] [2022-12-13 21:23:26,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:26,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:26,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:28,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 819 [2022-12-13 21:23:28,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 115 transitions, 779 flow. Second operand has 11 states, 11 states have (on average 295.27272727272725) internal successors, (3248), 11 states have internal predecessors, (3248), 0 states have call successors, (0), 0 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 21:23:28,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:28,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 819 [2022-12-13 21:23:28,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:29,273 INFO L130 PetriNetUnfolder]: 2958/5129 cut-off events. [2022-12-13 21:23:29,273 INFO L131 PetriNetUnfolder]: For 3416/3416 co-relation queries the response was YES. [2022-12-13 21:23:29,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12829 conditions, 5129 events. 2958/5129 cut-off events. For 3416/3416 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 26132 event pairs, 797 based on Foata normal form. 0/4346 useless extension candidates. Maximal degree in co-relation 12799. Up to 2458 conditions per place. [2022-12-13 21:23:29,295 INFO L137 encePairwiseOnDemand]: 809/819 looper letters, 119 selfloop transitions, 40 changer transitions 0/166 dead transitions. [2022-12-13 21:23:29,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 166 transitions, 1201 flow [2022-12-13 21:23:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:23:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:23:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2471 transitions. [2022-12-13 21:23:29,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37713675213675213 [2022-12-13 21:23:29,297 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2471 transitions. [2022-12-13 21:23:29,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2471 transitions. [2022-12-13 21:23:29,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:29,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2471 transitions. [2022-12-13 21:23:29,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 308.875) internal successors, (2471), 8 states have internal predecessors, (2471), 0 states have call successors, (0), 0 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 21:23:29,302 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 21:23:29,303 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 21:23:29,303 INFO L175 Difference]: Start difference. First operand has 128 places, 115 transitions, 779 flow. Second operand 8 states and 2471 transitions. [2022-12-13 21:23:29,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 166 transitions, 1201 flow [2022-12-13 21:23:29,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 166 transitions, 1173 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 21:23:29,318 INFO L231 Difference]: Finished difference. Result has 128 places, 114 transitions, 853 flow [2022-12-13 21:23:29,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=128, PETRI_TRANSITIONS=114} [2022-12-13 21:23:29,318 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2022-12-13 21:23:29,318 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 114 transitions, 853 flow [2022-12-13 21:23:29,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 295.27272727272725) internal successors, (3248), 11 states have internal predecessors, (3248), 0 states have call successors, (0), 0 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 21:23:29,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:29,319 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 21:23:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 21:23:29,319 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 21:23:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1473384968, now seen corresponding path program 1 times [2022-12-13 21:23:29,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:29,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499114262] [2022-12-13 21:23:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:29,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:29,735 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 21:23:29,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:29,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499114262] [2022-12-13 21:23:29,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499114262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:29,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:29,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 21:23:29,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797481523] [2022-12-13 21:23:29,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:29,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 21:23:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 21:23:29,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:23:30,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 819 [2022-12-13 21:23:30,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 114 transitions, 853 flow. Second operand has 10 states, 10 states have (on average 284.7) internal successors, (2847), 10 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:30,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:30,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 819 [2022-12-13 21:23:30,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:31,752 INFO L130 PetriNetUnfolder]: 3154/5471 cut-off events. [2022-12-13 21:23:31,753 INFO L131 PetriNetUnfolder]: For 5080/5080 co-relation queries the response was YES. [2022-12-13 21:23:31,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14225 conditions, 5471 events. 3154/5471 cut-off events. For 5080/5080 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 28424 event pairs, 2280 based on Foata normal form. 0/4636 useless extension candidates. Maximal degree in co-relation 14194. Up to 4859 conditions per place. [2022-12-13 21:23:31,773 INFO L137 encePairwiseOnDemand]: 810/819 looper letters, 130 selfloop transitions, 18 changer transitions 0/155 dead transitions. [2022-12-13 21:23:31,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 155 transitions, 1312 flow [2022-12-13 21:23:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2657 transitions. [2022-12-13 21:23:31,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36046669380002716 [2022-12-13 21:23:31,776 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2657 transitions. [2022-12-13 21:23:31,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2657 transitions. [2022-12-13 21:23:31,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:31,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2657 transitions. [2022-12-13 21:23:31,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 295.22222222222223) internal successors, (2657), 9 states have internal predecessors, (2657), 0 states have call successors, (0), 0 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 21:23:31,782 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 21:23:31,783 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 21:23:31,783 INFO L175 Difference]: Start difference. First operand has 128 places, 114 transitions, 853 flow. Second operand 9 states and 2657 transitions. [2022-12-13 21:23:31,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 155 transitions, 1312 flow [2022-12-13 21:23:31,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 155 transitions, 1255 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 21:23:31,803 INFO L231 Difference]: Finished difference. Result has 133 places, 118 transitions, 912 flow [2022-12-13 21:23:31,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=912, PETRI_PLACES=133, PETRI_TRANSITIONS=118} [2022-12-13 21:23:31,803 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -6 predicate places. [2022-12-13 21:23:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 118 transitions, 912 flow [2022-12-13 21:23:31,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 284.7) internal successors, (2847), 10 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:31,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:31,804 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 21:23:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 21:23:31,804 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 21:23:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash 291626763, now seen corresponding path program 1 times [2022-12-13 21:23:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:31,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694176350] [2022-12-13 21:23:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:31,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:32,333 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 21:23:32,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:32,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694176350] [2022-12-13 21:23:32,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694176350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:32,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:32,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 21:23:32,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459570393] [2022-12-13 21:23:32,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:32,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:32,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:33,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 819 [2022-12-13 21:23:33,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 118 transitions, 912 flow. Second operand has 11 states, 11 states have (on average 282.6363636363636) internal successors, (3109), 11 states have internal predecessors, (3109), 0 states have call successors, (0), 0 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 21:23:33,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:33,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 819 [2022-12-13 21:23:33,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:34,688 INFO L130 PetriNetUnfolder]: 3090/5365 cut-off events. [2022-12-13 21:23:34,688 INFO L131 PetriNetUnfolder]: For 5506/5506 co-relation queries the response was YES. [2022-12-13 21:23:34,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13953 conditions, 5365 events. 3090/5365 cut-off events. For 5506/5506 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 27757 event pairs, 807 based on Foata normal form. 44/4695 useless extension candidates. Maximal degree in co-relation 13919. Up to 2820 conditions per place. [2022-12-13 21:23:34,713 INFO L137 encePairwiseOnDemand]: 810/819 looper letters, 130 selfloop transitions, 35 changer transitions 0/172 dead transitions. [2022-12-13 21:23:34,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 172 transitions, 1365 flow [2022-12-13 21:23:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 21:23:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 21:23:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2370 transitions. [2022-12-13 21:23:34,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3617216117216117 [2022-12-13 21:23:34,717 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2370 transitions. [2022-12-13 21:23:34,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2370 transitions. [2022-12-13 21:23:34,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:34,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2370 transitions. [2022-12-13 21:23:34,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 296.25) internal successors, (2370), 8 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 21:23:34,725 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 21:23:34,726 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 21:23:34,726 INFO L175 Difference]: Start difference. First operand has 133 places, 118 transitions, 912 flow. Second operand 8 states and 2370 transitions. [2022-12-13 21:23:34,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 172 transitions, 1365 flow [2022-12-13 21:23:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 172 transitions, 1341 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-12-13 21:23:34,761 INFO L231 Difference]: Finished difference. Result has 137 places, 118 transitions, 974 flow [2022-12-13 21:23:34,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=974, PETRI_PLACES=137, PETRI_TRANSITIONS=118} [2022-12-13 21:23:34,761 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2022-12-13 21:23:34,762 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 118 transitions, 974 flow [2022-12-13 21:23:34,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 282.6363636363636) internal successors, (3109), 11 states have internal predecessors, (3109), 0 states have call successors, (0), 0 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 21:23:34,762 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:34,762 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 21:23:34,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 21:23:34,763 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1883456453, now seen corresponding path program 2 times [2022-12-13 21:23:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:34,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834569878] [2022-12-13 21:23:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:34,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:35,288 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 21:23:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834569878] [2022-12-13 21:23:35,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834569878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:35,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:35,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 21:23:35,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231737519] [2022-12-13 21:23:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:35,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 21:23:35,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 21:23:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:23:36,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 819 [2022-12-13 21:23:36,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 118 transitions, 974 flow. Second operand has 11 states, 11 states have (on average 282.6363636363636) internal successors, (3109), 11 states have internal predecessors, (3109), 0 states have call successors, (0), 0 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 21:23:36,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:36,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 819 [2022-12-13 21:23:36,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:37,640 INFO L130 PetriNetUnfolder]: 3074/5331 cut-off events. [2022-12-13 21:23:37,640 INFO L131 PetriNetUnfolder]: For 6851/6851 co-relation queries the response was YES. [2022-12-13 21:23:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14259 conditions, 5331 events. 3074/5331 cut-off events. For 6851/6851 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 27607 event pairs, 684 based on Foata normal form. 11/4629 useless extension candidates. Maximal degree in co-relation 14224. Up to 2464 conditions per place. [2022-12-13 21:23:37,662 INFO L137 encePairwiseOnDemand]: 810/819 looper letters, 126 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2022-12-13 21:23:37,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1408 flow [2022-12-13 21:23:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:23:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 21:23:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2647 transitions. [2022-12-13 21:23:37,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35911002577669243 [2022-12-13 21:23:37,664 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2647 transitions. [2022-12-13 21:23:37,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2647 transitions. [2022-12-13 21:23:37,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:37,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2647 transitions. [2022-12-13 21:23:37,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 294.1111111111111) internal successors, (2647), 9 states have internal predecessors, (2647), 0 states have call successors, (0), 0 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 21:23:37,669 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 21:23:37,670 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 21:23:37,670 INFO L175 Difference]: Start difference. First operand has 137 places, 118 transitions, 974 flow. Second operand 9 states and 2647 transitions. [2022-12-13 21:23:37,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1408 flow [2022-12-13 21:23:37,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1365 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 21:23:37,697 INFO L231 Difference]: Finished difference. Result has 141 places, 118 transitions, 1021 flow [2022-12-13 21:23:37,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1021, PETRI_PLACES=141, PETRI_TRANSITIONS=118} [2022-12-13 21:23:37,697 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2022-12-13 21:23:37,697 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 118 transitions, 1021 flow [2022-12-13 21:23:37,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 282.6363636363636) internal successors, (3109), 11 states have internal predecessors, (3109), 0 states have call successors, (0), 0 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 21:23:37,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:37,698 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 21:23:37,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 21:23:37,698 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1730997462, now seen corresponding path program 1 times [2022-12-13 21:23:37,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:37,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955131782] [2022-12-13 21:23:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:37,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:37,807 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 21:23:37,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955131782] [2022-12-13 21:23:37,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955131782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:37,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:37,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:23:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828746388] [2022-12-13 21:23:37,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 21:23:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 21:23:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 21:23:37,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 819 [2022-12-13 21:23:37,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 118 transitions, 1021 flow. Second operand has 4 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:37,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:37,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 819 [2022-12-13 21:23:37,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:38,686 INFO L130 PetriNetUnfolder]: 3797/6634 cut-off events. [2022-12-13 21:23:38,686 INFO L131 PetriNetUnfolder]: For 9656/9656 co-relation queries the response was YES. [2022-12-13 21:23:38,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17483 conditions, 6634 events. 3797/6634 cut-off events. For 9656/9656 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 36872 event pairs, 1905 based on Foata normal form. 24/5794 useless extension candidates. Maximal degree in co-relation 17447. Up to 4960 conditions per place. [2022-12-13 21:23:38,714 INFO L137 encePairwiseOnDemand]: 814/819 looper letters, 136 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2022-12-13 21:23:38,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 157 transitions, 1425 flow [2022-12-13 21:23:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:23:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:23:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1414 transitions. [2022-12-13 21:23:38,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2022-12-13 21:23:38,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1414 transitions. [2022-12-13 21:23:38,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1414 transitions. [2022-12-13 21:23:38,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:38,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1414 transitions. [2022-12-13 21:23:38,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 353.5) internal successors, (1414), 4 states have internal predecessors, (1414), 0 states have call successors, (0), 0 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 21:23:38,720 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 21:23:38,721 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 21:23:38,721 INFO L175 Difference]: Start difference. First operand has 141 places, 118 transitions, 1021 flow. Second operand 4 states and 1414 transitions. [2022-12-13 21:23:38,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 157 transitions, 1425 flow [2022-12-13 21:23:38,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 157 transitions, 1371 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 21:23:38,751 INFO L231 Difference]: Finished difference. Result has 139 places, 119 transitions, 983 flow [2022-12-13 21:23:38,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=983, PETRI_PLACES=139, PETRI_TRANSITIONS=119} [2022-12-13 21:23:38,751 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 0 predicate places. [2022-12-13 21:23:38,751 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 119 transitions, 983 flow [2022-12-13 21:23:38,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 335.25) internal successors, (1341), 4 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:38,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:38,752 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] [2022-12-13 21:23:38,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 21:23:38,752 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 21:23:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2087301079, now seen corresponding path program 1 times [2022-12-13 21:23:38,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509285108] [2022-12-13 21:23:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:38,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:38,778 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 21:23:38,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:38,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509285108] [2022-12-13 21:23:38,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509285108] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:38,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:38,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533402965] [2022-12-13 21:23:38,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:38,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:38,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:38,785 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 819 [2022-12-13 21:23:38,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 119 transitions, 983 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:38,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:38,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 819 [2022-12-13 21:23:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:39,303 INFO L130 PetriNetUnfolder]: 2647/4698 cut-off events. [2022-12-13 21:23:39,303 INFO L131 PetriNetUnfolder]: For 6940/6940 co-relation queries the response was YES. [2022-12-13 21:23:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12853 conditions, 4698 events. 2647/4698 cut-off events. For 6940/6940 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 24853 event pairs, 1360 based on Foata normal form. 0/4242 useless extension candidates. Maximal degree in co-relation 12816. Up to 2605 conditions per place. [2022-12-13 21:23:39,327 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 115 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2022-12-13 21:23:39,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 133 transitions, 1268 flow [2022-12-13 21:23:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1074 transitions. [2022-12-13 21:23:39,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371184371184371 [2022-12-13 21:23:39,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1074 transitions. [2022-12-13 21:23:39,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1074 transitions. [2022-12-13 21:23:39,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:39,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1074 transitions. [2022-12-13 21:23:39,330 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 21:23:39,331 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 21:23:39,331 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 21:23:39,331 INFO L175 Difference]: Start difference. First operand has 139 places, 119 transitions, 983 flow. Second operand 3 states and 1074 transitions. [2022-12-13 21:23:39,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 133 transitions, 1268 flow [2022-12-13 21:23:39,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 1254 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 21:23:39,357 INFO L231 Difference]: Finished difference. Result has 140 places, 116 transitions, 966 flow [2022-12-13 21:23:39,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=966, PETRI_PLACES=140, PETRI_TRANSITIONS=116} [2022-12-13 21:23:39,358 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2022-12-13 21:23:39,358 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 116 transitions, 966 flow [2022-12-13 21:23:39,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:39,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:39,358 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] [2022-12-13 21:23:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 21:23:39,358 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2044997360, now seen corresponding path program 1 times [2022-12-13 21:23:39,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:39,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023361267] [2022-12-13 21:23:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:23:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:39,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023361267] [2022-12-13 21:23:39,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023361267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:39,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:39,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:39,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934272371] [2022-12-13 21:23:39,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:39,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:39,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:39,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 819 [2022-12-13 21:23:39,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 116 transitions, 966 flow. Second operand has 3 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:39,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:39,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 819 [2022-12-13 21:23:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:40,270 INFO L130 PetriNetUnfolder]: 4045/7392 cut-off events. [2022-12-13 21:23:40,270 INFO L131 PetriNetUnfolder]: For 12040/12044 co-relation queries the response was YES. [2022-12-13 21:23:40,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19774 conditions, 7392 events. 4045/7392 cut-off events. For 12040/12044 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 46126 event pairs, 1992 based on Foata normal form. 2/6950 useless extension candidates. Maximal degree in co-relation 19736. Up to 4346 conditions per place. [2022-12-13 21:23:40,309 INFO L137 encePairwiseOnDemand]: 816/819 looper letters, 171 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2022-12-13 21:23:40,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 1821 flow [2022-12-13 21:23:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1110 transitions. [2022-12-13 21:23:40,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4517704517704518 [2022-12-13 21:23:40,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1110 transitions. [2022-12-13 21:23:40,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1110 transitions. [2022-12-13 21:23:40,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:40,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1110 transitions. [2022-12-13 21:23:40,312 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 21:23:40,314 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 21:23:40,314 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 21:23:40,314 INFO L175 Difference]: Start difference. First operand has 140 places, 116 transitions, 966 flow. Second operand 3 states and 1110 transitions. [2022-12-13 21:23:40,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 1821 flow [2022-12-13 21:23:40,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 1813 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:23:40,347 INFO L231 Difference]: Finished difference. Result has 141 places, 117 transitions, 972 flow [2022-12-13 21:23:40,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=972, PETRI_PLACES=141, PETRI_TRANSITIONS=117} [2022-12-13 21:23:40,347 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2022-12-13 21:23:40,347 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 117 transitions, 972 flow [2022-12-13 21:23:40,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:23:40,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:40,348 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 21:23:40,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 21:23:40,348 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1851294606, now seen corresponding path program 1 times [2022-12-13 21:23:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:40,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858297633] [2022-12-13 21:23:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:40,416 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 21:23:40,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:40,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858297633] [2022-12-13 21:23:40,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858297633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:40,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:40,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:23:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417388380] [2022-12-13 21:23:40,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:40,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:23:40,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:23:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:23:40,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 819 [2022-12-13 21:23:40,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 117 transitions, 972 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 21:23:40,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:40,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 819 [2022-12-13 21:23:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:41,032 INFO L130 PetriNetUnfolder]: 2970/5450 cut-off events. [2022-12-13 21:23:41,032 INFO L131 PetriNetUnfolder]: For 6602/6602 co-relation queries the response was YES. [2022-12-13 21:23:41,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15408 conditions, 5450 events. 2970/5450 cut-off events. For 6602/6602 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 30553 event pairs, 854 based on Foata normal form. 510/5752 useless extension candidates. Maximal degree in co-relation 15369. Up to 3723 conditions per place. [2022-12-13 21:23:41,056 INFO L137 encePairwiseOnDemand]: 813/819 looper letters, 110 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2022-12-13 21:23:41,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 131 transitions, 1276 flow [2022-12-13 21:23:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:23:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:23:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-12-13 21:23:41,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43304843304843305 [2022-12-13 21:23:41,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-12-13 21:23:41,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-12-13 21:23:41,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:41,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-12-13 21:23:41,059 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 21:23:41,060 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 21:23:41,060 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 21:23:41,060 INFO L175 Difference]: Start difference. First operand has 141 places, 117 transitions, 972 flow. Second operand 3 states and 1064 transitions. [2022-12-13 21:23:41,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 131 transitions, 1276 flow [2022-12-13 21:23:41,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 131 transitions, 1272 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:41,075 INFO L231 Difference]: Finished difference. Result has 142 places, 117 transitions, 982 flow [2022-12-13 21:23:41,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=982, PETRI_PLACES=142, PETRI_TRANSITIONS=117} [2022-12-13 21:23:41,076 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 3 predicate places. [2022-12-13 21:23:41,076 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 117 transitions, 982 flow [2022-12-13 21:23:41,076 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 21:23:41,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:41,076 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 21:23:41,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 21:23:41,076 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash 311308553, now seen corresponding path program 1 times [2022-12-13 21:23:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:41,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896827536] [2022-12-13 21:23:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:41,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:41,119 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 21:23:41,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896827536] [2022-12-13 21:23:41,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896827536] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:23:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158823497] [2022-12-13 21:23:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:41,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:41,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:23:41,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:23:41,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:23:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:23:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:23:41,266 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 21:23:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:23:41,283 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 21:23:41,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158823497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:23:41,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:23:41,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 21:23:41,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982588255] [2022-12-13 21:23:41,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:23:41,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:23:41,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:23:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:23:41,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 819 [2022-12-13 21:23:41,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 117 transitions, 982 flow. Second operand has 7 states, 7 states have (on average 339.42857142857144) internal successors, (2376), 7 states have internal predecessors, (2376), 0 states have call successors, (0), 0 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 21:23:41,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:41,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 819 [2022-12-13 21:23:41,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:42,566 INFO L130 PetriNetUnfolder]: 4533/8900 cut-off events. [2022-12-13 21:23:42,566 INFO L131 PetriNetUnfolder]: For 9281/9315 co-relation queries the response was YES. [2022-12-13 21:23:42,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24451 conditions, 8900 events. 4533/8900 cut-off events. For 9281/9315 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 59878 event pairs, 684 based on Foata normal form. 754/9253 useless extension candidates. Maximal degree in co-relation 24412. Up to 1774 conditions per place. [2022-12-13 21:23:42,614 INFO L137 encePairwiseOnDemand]: 815/819 looper letters, 302 selfloop transitions, 6 changer transitions 0/325 dead transitions. [2022-12-13 21:23:42,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 325 transitions, 2673 flow [2022-12-13 21:23:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:23:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:23:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2237 transitions. [2022-12-13 21:23:42,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45522995522995524 [2022-12-13 21:23:42,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2237 transitions. [2022-12-13 21:23:42,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2237 transitions. [2022-12-13 21:23:42,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:42,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2237 transitions. [2022-12-13 21:23:42,619 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 21:23:42,621 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 21:23:42,621 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 21:23:42,621 INFO L175 Difference]: Start difference. First operand has 142 places, 117 transitions, 982 flow. Second operand 6 states and 2237 transitions. [2022-12-13 21:23:42,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 325 transitions, 2673 flow [2022-12-13 21:23:42,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 325 transitions, 2651 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:42,639 INFO L231 Difference]: Finished difference. Result has 150 places, 120 transitions, 1017 flow [2022-12-13 21:23:42,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1017, PETRI_PLACES=150, PETRI_TRANSITIONS=120} [2022-12-13 21:23:42,639 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 11 predicate places. [2022-12-13 21:23:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 120 transitions, 1017 flow [2022-12-13 21:23:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 339.42857142857144) internal successors, (2376), 7 states have internal predecessors, (2376), 0 states have call successors, (0), 0 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 21:23:42,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:42,640 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 21:23:42,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:23:42,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d48cb7ed-795f-44e2-8b71-1b1564984f55/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:23:42,842 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-13 21:23:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash -594557802, now seen corresponding path program 1 times [2022-12-13 21:23:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:42,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899536588] [2022-12-13 21:23:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:42,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:43,908 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 21:23:43,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899536588] [2022-12-13 21:23:43,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899536588] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:43,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:43,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 21:23:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457627019] [2022-12-13 21:23:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:43,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 21:23:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:43,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 21:23:43,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-13 21:23:46,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 819 [2022-12-13 21:23:46,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 120 transitions, 1017 flow. Second operand has 16 states, 16 states have (on average 285.8125) internal successors, (4573), 16 states have internal predecessors, (4573), 0 states have call successors, (0), 0 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 21:23:46,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:46,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 819 [2022-12-13 21:23:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:48,537 INFO L130 PetriNetUnfolder]: 6041/11701 cut-off events. [2022-12-13 21:23:48,537 INFO L131 PetriNetUnfolder]: For 19283/19283 co-relation queries the response was YES. [2022-12-13 21:23:48,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34926 conditions, 11701 events. 6041/11701 cut-off events. For 19283/19283 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 80577 event pairs, 1986 based on Foata normal form. 0/11144 useless extension candidates. Maximal degree in co-relation 34883. Up to 4158 conditions per place. [2022-12-13 21:23:48,602 INFO L137 encePairwiseOnDemand]: 806/819 looper letters, 205 selfloop transitions, 41 changer transitions 0/252 dead transitions. [2022-12-13 21:23:48,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 252 transitions, 2197 flow [2022-12-13 21:23:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:23:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 21:23:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3574 transitions. [2022-12-13 21:23:48,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36365486365486366 [2022-12-13 21:23:48,607 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3574 transitions. [2022-12-13 21:23:48,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3574 transitions. [2022-12-13 21:23:48,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:48,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3574 transitions. [2022-12-13 21:23:48,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 297.8333333333333) internal successors, (3574), 12 states have internal predecessors, (3574), 0 states have call successors, (0), 0 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 21:23:48,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 819.0) internal successors, (10647), 13 states have internal predecessors, (10647), 0 states have call successors, (0), 0 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 21:23:48,621 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 819.0) internal successors, (10647), 13 states have internal predecessors, (10647), 0 states have call successors, (0), 0 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 21:23:48,621 INFO L175 Difference]: Start difference. First operand has 150 places, 120 transitions, 1017 flow. Second operand 12 states and 3574 transitions. [2022-12-13 21:23:48,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 252 transitions, 2197 flow [2022-12-13 21:23:48,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 252 transitions, 2125 flow, removed 27 selfloop flow, removed 1 redundant places. [2022-12-13 21:23:48,664 INFO L231 Difference]: Finished difference. Result has 164 places, 130 transitions, 1180 flow [2022-12-13 21:23:48,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1180, PETRI_PLACES=164, PETRI_TRANSITIONS=130} [2022-12-13 21:23:48,664 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 25 predicate places. [2022-12-13 21:23:48,664 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 130 transitions, 1180 flow [2022-12-13 21:23:48,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 285.8125) internal successors, (4573), 16 states have internal predecessors, (4573), 0 states have call successors, (0), 0 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 21:23:48,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:48,665 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 21:23:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 21:23:48,665 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 21:23:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1523653136, now seen corresponding path program 2 times [2022-12-13 21:23:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:48,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374788217] [2022-12-13 21:23:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:49,436 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 21:23:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374788217] [2022-12-13 21:23:49,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374788217] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:49,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:49,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 21:23:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027838385] [2022-12-13 21:23:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:49,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:23:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:23:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:23:52,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 819 [2022-12-13 21:23:52,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 130 transitions, 1180 flow. Second operand has 15 states, 15 states have (on average 288.93333333333334) internal successors, (4334), 15 states have internal predecessors, (4334), 0 states have call successors, (0), 0 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 21:23:52,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:52,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 819 [2022-12-13 21:23:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:54,444 INFO L130 PetriNetUnfolder]: 5410/10483 cut-off events. [2022-12-13 21:23:54,444 INFO L131 PetriNetUnfolder]: For 17047/17047 co-relation queries the response was YES. [2022-12-13 21:23:54,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31600 conditions, 10483 events. 5410/10483 cut-off events. For 17047/17047 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 70213 event pairs, 1784 based on Foata normal form. 52/10162 useless extension candidates. Maximal degree in co-relation 31552. Up to 3977 conditions per place. [2022-12-13 21:23:54,496 INFO L137 encePairwiseOnDemand]: 801/819 looper letters, 193 selfloop transitions, 56 changer transitions 0/255 dead transitions. [2022-12-13 21:23:54,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 255 transitions, 2358 flow [2022-12-13 21:23:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 21:23:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 21:23:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4752 transitions. [2022-12-13 21:23:54,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3626373626373626 [2022-12-13 21:23:54,501 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4752 transitions. [2022-12-13 21:23:54,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4752 transitions. [2022-12-13 21:23:54,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:54,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4752 transitions. [2022-12-13 21:23:54,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 297.0) internal successors, (4752), 16 states have internal predecessors, (4752), 0 states have call successors, (0), 0 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 21:23:54,513 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 21:23:54,514 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 21:23:54,514 INFO L175 Difference]: Start difference. First operand has 164 places, 130 transitions, 1180 flow. Second operand 16 states and 4752 transitions. [2022-12-13 21:23:54,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 255 transitions, 2358 flow [2022-12-13 21:23:54,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 255 transitions, 2277 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-12-13 21:23:54,561 INFO L231 Difference]: Finished difference. Result has 175 places, 137 transitions, 1311 flow [2022-12-13 21:23:54,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1311, PETRI_PLACES=175, PETRI_TRANSITIONS=137} [2022-12-13 21:23:54,561 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 36 predicate places. [2022-12-13 21:23:54,561 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 137 transitions, 1311 flow [2022-12-13 21:23:54,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 288.93333333333334) internal successors, (4334), 15 states have internal predecessors, (4334), 0 states have call successors, (0), 0 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 21:23:54,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:54,562 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 21:23:54,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 21:23:54,562 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 21:23:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash 29048394, now seen corresponding path program 3 times [2022-12-13 21:23:54,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:54,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349517458] [2022-12-13 21:23:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:54,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:23:55,325 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 21:23:55,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:23:55,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349517458] [2022-12-13 21:23:55,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349517458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:23:55,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:23:55,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 21:23:55,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323169987] [2022-12-13 21:23:55,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:23:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:23:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:23:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:23:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:23:57,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 819 [2022-12-13 21:23:57,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 137 transitions, 1311 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 21:23:57,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:23:57,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 819 [2022-12-13 21:23:57,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:23:59,384 INFO L130 PetriNetUnfolder]: 5430/10523 cut-off events. [2022-12-13 21:23:59,384 INFO L131 PetriNetUnfolder]: For 18798/18798 co-relation queries the response was YES. [2022-12-13 21:23:59,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32792 conditions, 10523 events. 5430/10523 cut-off events. For 18798/18798 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 70529 event pairs, 1811 based on Foata normal form. 5/10155 useless extension candidates. Maximal degree in co-relation 32741. Up to 3972 conditions per place. [2022-12-13 21:23:59,464 INFO L137 encePairwiseOnDemand]: 801/819 looper letters, 195 selfloop transitions, 58 changer transitions 0/259 dead transitions. [2022-12-13 21:23:59,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 259 transitions, 2473 flow [2022-12-13 21:23:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 21:23:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 21:23:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4523 transitions. [2022-12-13 21:23:59,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36817256817256816 [2022-12-13 21:23:59,469 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4523 transitions. [2022-12-13 21:23:59,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4523 transitions. [2022-12-13 21:23:59,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:23:59,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4523 transitions. [2022-12-13 21:23:59,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 301.53333333333336) internal successors, (4523), 15 states have internal predecessors, (4523), 0 states have call successors, (0), 0 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 21:23:59,483 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 21:23:59,484 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 21:23:59,484 INFO L175 Difference]: Start difference. First operand has 175 places, 137 transitions, 1311 flow. Second operand 15 states and 4523 transitions. [2022-12-13 21:23:59,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 259 transitions, 2473 flow [2022-12-13 21:23:59,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 259 transitions, 2389 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-12-13 21:23:59,587 INFO L231 Difference]: Finished difference. Result has 184 places, 141 transitions, 1401 flow [2022-12-13 21:23:59,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1401, PETRI_PLACES=184, PETRI_TRANSITIONS=141} [2022-12-13 21:23:59,587 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 45 predicate places. [2022-12-13 21:23:59,587 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 141 transitions, 1401 flow [2022-12-13 21:23:59,588 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 21:23:59,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:23:59,588 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 21:23:59,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 21:23:59,588 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 21:23:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:23:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash -115388130, now seen corresponding path program 4 times [2022-12-13 21:23:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:23:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557523477] [2022-12-13 21:23:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:23:59,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:23:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:24:00,176 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 21:24:00,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:24:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557523477] [2022-12-13 21:24:00,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557523477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:24:00,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:24:00,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 21:24:00,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729274647] [2022-12-13 21:24:00,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:24:00,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 21:24:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:24:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 21:24:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-12-13 21:24:02,372 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 819 [2022-12-13 21:24:02,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 141 transitions, 1401 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 21:24:02,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:24:02,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 819 [2022-12-13 21:24:02,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:24:04,090 INFO L130 PetriNetUnfolder]: 5388/10502 cut-off events. [2022-12-13 21:24:04,090 INFO L131 PetriNetUnfolder]: For 19658/19658 co-relation queries the response was YES. [2022-12-13 21:24:04,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33504 conditions, 10502 events. 5388/10502 cut-off events. For 19658/19658 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 70298 event pairs, 1665 based on Foata normal form. 5/10134 useless extension candidates. Maximal degree in co-relation 33450. Up to 3936 conditions per place. [2022-12-13 21:24:04,155 INFO L137 encePairwiseOnDemand]: 802/819 looper letters, 200 selfloop transitions, 59 changer transitions 0/265 dead transitions. [2022-12-13 21:24:04,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 265 transitions, 2599 flow [2022-12-13 21:24:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 21:24:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 21:24:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4521 transitions. [2022-12-13 21:24:04,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36800976800976803 [2022-12-13 21:24:04,159 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4521 transitions. [2022-12-13 21:24:04,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4521 transitions. [2022-12-13 21:24:04,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:24:04,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4521 transitions. [2022-12-13 21:24:04,163 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 21:24:04,168 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 21:24:04,168 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 21:24:04,169 INFO L175 Difference]: Start difference. First operand has 184 places, 141 transitions, 1401 flow. Second operand 15 states and 4521 transitions. [2022-12-13 21:24:04,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 265 transitions, 2599 flow [2022-12-13 21:24:04,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 265 transitions, 2529 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-12-13 21:24:04,226 INFO L231 Difference]: Finished difference. Result has 192 places, 144 transitions, 1496 flow [2022-12-13 21:24:04,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=819, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1496, PETRI_PLACES=192, PETRI_TRANSITIONS=144} [2022-12-13 21:24:04,227 INFO L288 CegarLoopForPetriNet]: 139 programPoint places, 53 predicate places. [2022-12-13 21:24:04,227 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 144 transitions, 1496 flow [2022-12-13 21:24:04,227 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 21:24:04,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:24:04,227 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 21:24:04,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 21:24:04,228 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 21:24:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:24:04,228 INFO L85 PathProgramCache]: Analyzing trace with hash 969149412, now seen corresponding path program 1 times [2022-12-13 21:24:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:24:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204414634] [2022-12-13 21:24:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:24:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:24:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat