./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:29:31,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:29:31,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:29:31,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:29:31,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:29:31,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:29:31,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:29:31,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:29:31,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:29:31,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:29:31,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:29:31,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:29:31,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:29:31,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:29:31,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:29:31,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:29:31,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:29:31,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:29:31,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:29:31,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:29:31,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:29:31,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:29:31,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:29:31,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:29:31,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:29:31,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:29:31,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:29:31,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:29:31,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:29:31,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:29:31,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:29:31,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:29:31,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:29:31,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:29:31,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:29:31,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:29:31,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:29:31,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:29:31,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:29:31,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:29:31,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:29:31,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:29:31,781 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:29:31,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:29:31,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:29:31,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:29:31,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:29:31,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:29:31,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:29:31,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:29:31,785 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:29:31,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:29:31,786 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:29:31,786 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:29:31,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:29:31,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:29:31,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:29:31,787 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:29:31,788 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:29:31,788 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:29:31,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:29:31,788 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:29:31,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:29:31,789 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:29:31,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:29:31,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:29:31,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:29:31,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:29:31,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:29:31,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:29:31,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:29:31,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:29:31,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:29:31,792 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:29:31,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:29:31,792 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_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-25 17:29:32,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:29:32,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:29:32,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:29:32,120 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:29:32,121 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:29:32,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-25 17:29:35,144 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:29:35,358 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:29:35,359 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-25 17:29:35,366 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/data/161352ed2/e00bde7a90704f4cb5f67f9916855ebd/FLAGdaeed0184 [2022-11-25 17:29:35,385 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/data/161352ed2/e00bde7a90704f4cb5f67f9916855ebd [2022-11-25 17:29:35,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:29:35,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:29:35,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:29:35,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:29:35,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:29:35,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bbceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35, skipping insertion in model container [2022-11-25 17:29:35,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:29:35,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:29:35,714 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:29:35,715 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:29:35,724 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:29:35,725 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:29:35,736 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_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-25 17:29:35,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:29:35,753 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:29:35,772 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:29:35,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:29:35,774 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:29:35,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:29:35,787 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_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-25 17:29:35,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:29:35,810 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:29:35,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35 WrapperNode [2022-11-25 17:29:35,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:29:35,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:29:35,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:29:35,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:29:35,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,846 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-25 17:29:35,846 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:29:35,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:29:35,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:29:35,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:29:35,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,869 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:29:35,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:29:35,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:29:35,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:29:35,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (1/1) ... [2022-11-25 17:29:35,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:29:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:35,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:29:35,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:29:35,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:29:35,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:29:35,952 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:29:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:29:35,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:29:35,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:29:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:29:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:29:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:29:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:29:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:29:35,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:29:35,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:29:35,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:29:35,956 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:29:36,060 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:29:36,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:29:36,345 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:29:36,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:29:36,419 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:29:36,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:29:36 BoogieIcfgContainer [2022-11-25 17:29:36,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:29:36,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:29:36,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:29:36,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:29:36,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:29:35" (1/3) ... [2022-11-25 17:29:36,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa43a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:29:36, skipping insertion in model container [2022-11-25 17:29:36,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:29:35" (2/3) ... [2022-11-25 17:29:36,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa43a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:29:36, skipping insertion in model container [2022-11-25 17:29:36,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:29:36" (3/3) ... [2022-11-25 17:29:36,431 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-25 17:29:36,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:29:36,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 17:29:36,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:29:36,550 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:29:36,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 89 transitions, 194 flow [2022-11-25 17:29:36,683 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-11-25 17:29:36,683 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:29:36,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 5/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-11-25 17:29:36,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 89 transitions, 194 flow [2022-11-25 17:29:36,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 82 transitions, 176 flow [2022-11-25 17:29:36,701 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:29:36,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 82 transitions, 176 flow [2022-11-25 17:29:36,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 82 transitions, 176 flow [2022-11-25 17:29:36,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 82 transitions, 176 flow [2022-11-25 17:29:36,772 INFO L130 PetriNetUnfolder]: 5/82 cut-off events. [2022-11-25 17:29:36,772 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:29:36,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 5/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-11-25 17:29:36,775 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-11-25 17:29:40,114 INFO L134 LiptonReduction]: Checked pairs total: 696 [2022-11-25 17:29:40,114 INFO L136 LiptonReduction]: Total number of compositions: 83 [2022-11-25 17:29:40,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:29:40,138 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;@6e57453b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:29:40,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 17:29:40,140 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:29:40,140 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:29:40,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:40,141 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:29:40,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash 363, now seen corresponding path program 1 times [2022-11-25 17:29:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:40,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620092160] [2022-11-25 17:29:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:40,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:40,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620092160] [2022-11-25 17:29:40,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620092160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:40,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:40,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:29:40,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648675575] [2022-11-25 17:29:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:29:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:29:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:29:40,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2022-11-25 17:29:40,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:40,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2022-11-25 17:29:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:40,394 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-11-25 17:29:40,395 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:29:40,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 509 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-11-25 17:29:40,399 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-11-25 17:29:40,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-11-25 17:29:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:29:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:29:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 180 transitions. [2022-11-25 17:29:40,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2022-11-25 17:29:40,416 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 180 transitions. [2022-11-25 17:29:40,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 180 transitions. [2022-11-25 17:29:40,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:40,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 180 transitions. [2022-11-25 17:29:40,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,435 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,437 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 180 transitions. [2022-11-25 17:29:40,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-11-25 17:29:40,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:29:40,443 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-11-25 17:29:40,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-11-25 17:29:40,449 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 17:29:40,449 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-11-25 17:29:40,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:40,454 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:29:40,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:29:40,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash 355857, now seen corresponding path program 1 times [2022-11-25 17:29:40,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:40,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66763374] [2022-11-25 17:29:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66763374] [2022-11-25 17:29:40,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66763374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:40,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:40,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:29:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61690322] [2022-11-25 17:29:40,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:40,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:29:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:29:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:29:40,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-11-25 17:29:40,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:40,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-11-25 17:29:40,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:40,732 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-11-25 17:29:40,732 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:29:40,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 456 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-11-25 17:29:40,734 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-25 17:29:40,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-11-25 17:29:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2022-11-25 17:29:40,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4437984496124031 [2022-11-25 17:29:40,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2022-11-25 17:29:40,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2022-11-25 17:29:40,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:40,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2022-11-25 17:29:40,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,741 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 229 transitions. [2022-11-25 17:29:40,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-11-25 17:29:40,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:29:40,742 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-11-25 17:29:40,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-11-25 17:29:40,743 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 17:29:40,743 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-11-25 17:29:40,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:40,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:29:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:29:40,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 355858, now seen corresponding path program 1 times [2022-11-25 17:29:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:40,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476084161] [2022-11-25 17:29:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:40,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:40,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476084161] [2022-11-25 17:29:40,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476084161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:40,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:40,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:29:40,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900730421] [2022-11-25 17:29:40,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:40,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:29:40,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:29:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:29:40,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2022-11-25 17:29:40,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:40,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2022-11-25 17:29:40,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:40,957 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-11-25 17:29:40,958 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:29:40,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 404 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-11-25 17:29:40,959 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 17:29:40,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-11-25 17:29:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-11-25 17:29:40,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2022-11-25 17:29:40,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-11-25 17:29:40,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-11-25 17:29:40,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:40,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-11-25 17:29:40,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,966 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 239 transitions. [2022-11-25 17:29:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-11-25 17:29:40,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:40,967 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-11-25 17:29:40,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-11-25 17:29:40,968 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 17:29:40,968 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-11-25 17:29:40,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:40,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:40,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:29:40,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:29:40,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 341985640, now seen corresponding path program 1 times [2022-11-25 17:29:40,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:40,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561197588] [2022-11-25 17:29:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:40,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561197588] [2022-11-25 17:29:41,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561197588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:41,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:41,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:29:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859568909] [2022-11-25 17:29:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:41,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:29:41,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:29:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:29:41,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 172 [2022-11-25 17:29:41,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:41,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 172 [2022-11-25 17:29:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:41,177 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-11-25 17:29:41,178 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:29:41,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 286 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-11-25 17:29:41,182 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-11-25 17:29:41,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-11-25 17:29:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2022-11-25 17:29:41,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2022-11-25 17:29:41,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2022-11-25 17:29:41,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2022-11-25 17:29:41,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:41,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2022-11-25 17:29:41,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,216 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 213 transitions. [2022-11-25 17:29:41,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-11-25 17:29:41,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:41,217 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-11-25 17:29:41,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-11-25 17:29:41,218 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 17:29:41,218 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-11-25 17:29:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:41,219 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:29:41,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:29:41,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 341985641, now seen corresponding path program 1 times [2022-11-25 17:29:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614752568] [2022-11-25 17:29:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:41,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614752568] [2022-11-25 17:29:41,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614752568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:41,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:41,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:29:41,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094271040] [2022-11-25 17:29:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:29:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:29:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:29:41,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2022-11-25 17:29:41,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:41,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2022-11-25 17:29:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:41,453 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-11-25 17:29:41,453 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:29:41,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-11-25 17:29:41,454 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-11-25 17:29:41,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-11-25 17:29:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2022-11-25 17:29:41,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2022-11-25 17:29:41,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2022-11-25 17:29:41,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2022-11-25 17:29:41,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:41,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2022-11-25 17:29:41,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,462 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 230 transitions. [2022-11-25 17:29:41,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-11-25 17:29:41,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:41,466 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-11-25 17:29:41,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-11-25 17:29:41,470 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 17:29:41,470 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-11-25 17:29:41,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:41,471 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:41,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:29:41,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1878924741, now seen corresponding path program 1 times [2022-11-25 17:29:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:41,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515876946] [2022-11-25 17:29:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:41,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515876946] [2022-11-25 17:29:41,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515876946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:41,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:41,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:29:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103720218] [2022-11-25 17:29:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:29:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:29:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:29:41,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-11-25 17:29:41,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:41,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-11-25 17:29:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:41,628 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-11-25 17:29:41,628 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:29:41,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 272 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2022-11-25 17:29:41,629 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-11-25 17:29:41,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2022-11-25 17:29:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:29:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:29:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2022-11-25 17:29:41,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-11-25 17:29:41,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2022-11-25 17:29:41,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2022-11-25 17:29:41,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:41,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2022-11-25 17:29:41,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,635 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 258 transitions. [2022-11-25 17:29:41,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2022-11-25 17:29:41,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:41,636 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2022-11-25 17:29:41,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2022-11-25 17:29:41,637 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-11-25 17:29:41,637 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2022-11-25 17:29:41,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:41,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:29:41,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1842219016, now seen corresponding path program 1 times [2022-11-25 17:29:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364689988] [2022-11-25 17:29:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:41,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364689988] [2022-11-25 17:29:41,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364689988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:41,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:41,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:29:41,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289097012] [2022-11-25 17:29:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:29:41,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:29:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:41,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-11-25 17:29:41,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:41,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-11-25 17:29:41,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:41,829 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2022-11-25 17:29:41,830 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:29:41,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 423 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2022-11-25 17:29:41,831 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2022-11-25 17:29:41,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2022-11-25 17:29:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:29:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:29:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2022-11-25 17:29:41,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44670542635658916 [2022-11-25 17:29:41,834 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2022-11-25 17:29:41,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2022-11-25 17:29:41,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:41,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2022-11-25 17:29:41,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,839 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,839 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 461 transitions. [2022-11-25 17:29:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2022-11-25 17:29:41,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:41,841 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2022-11-25 17:29:41,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2022-11-25 17:29:41,842 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-11-25 17:29:41,842 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2022-11-25 17:29:41,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:41,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:41,842 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:41,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:29:41,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:41,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1905694768, now seen corresponding path program 2 times [2022-11-25 17:29:41,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:41,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522395008] [2022-11-25 17:29:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:41,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:41,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522395008] [2022-11-25 17:29:41,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522395008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097529471] [2022-11-25 17:29:41,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:29:41,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:41,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:41,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:41,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:29:42,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:29:42,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:42,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:42,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097529471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:42,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 17:29:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818564326] [2022-11-25 17:29:42,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:29:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:29:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:29:42,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:42,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 8 states, 8 states have (on average 71.75) internal successors, (574), 8 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:42,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:42,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:42,341 INFO L130 PetriNetUnfolder]: 56/105 cut-off events. [2022-11-25 17:29:42,341 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-25 17:29:42,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 105 events. 56/105 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 271 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 331. Up to 62 conditions per place. [2022-11-25 17:29:42,343 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2022-11-25 17:29:42,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 194 flow [2022-11-25 17:29:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:29:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:29:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 378 transitions. [2022-11-25 17:29:42,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2022-11-25 17:29:42,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 378 transitions. [2022-11-25 17:29:42,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 378 transitions. [2022-11-25 17:29:42,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:42,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 378 transitions. [2022-11-25 17:29:42,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,349 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,349 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 5 states and 378 transitions. [2022-11-25 17:29:42,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 194 flow [2022-11-25 17:29:42,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 178 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-25 17:29:42,352 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 95 flow [2022-11-25 17:29:42,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=95, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2022-11-25 17:29:42,353 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-11-25 17:29:42,353 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 95 flow [2022-11-25 17:29:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.75) internal successors, (574), 8 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:42,354 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:42,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:42,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:42,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1645939364, now seen corresponding path program 3 times [2022-11-25 17:29:42,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977432303] [2022-11-25 17:29:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:42,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:42,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977432303] [2022-11-25 17:29:42,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977432303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:42,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:42,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:29:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669167055] [2022-11-25 17:29:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:29:42,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:29:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:42,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2022-11-25 17:29:42,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:42,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2022-11-25 17:29:42,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:42,792 INFO L130 PetriNetUnfolder]: 71/136 cut-off events. [2022-11-25 17:29:42,792 INFO L131 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-11-25 17:29:42,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 136 events. 71/136 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 459. Up to 75 conditions per place. [2022-11-25 17:29:42,794 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 31 selfloop transitions, 6 changer transitions 2/39 dead transitions. [2022-11-25 17:29:42,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 250 flow [2022-11-25 17:29:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:29:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:29:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 388 transitions. [2022-11-25 17:29:42,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2022-11-25 17:29:42,796 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 388 transitions. [2022-11-25 17:29:42,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 388 transitions. [2022-11-25 17:29:42,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:42,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 388 transitions. [2022-11-25 17:29:42,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,800 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,800 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 95 flow. Second operand 5 states and 388 transitions. [2022-11-25 17:29:42,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 250 flow [2022-11-25 17:29:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 238 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:42,802 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 128 flow [2022-11-25 17:29:42,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2022-11-25 17:29:42,803 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-11-25 17:29:42,804 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 128 flow [2022-11-25 17:29:42,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:42,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:42,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:29:42,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1572610710, now seen corresponding path program 4 times [2022-11-25 17:29:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:42,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835913032] [2022-11-25 17:29:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:42,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835913032] [2022-11-25 17:29:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835913032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319893080] [2022-11-25 17:29:42,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:29:42,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:42,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:42,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:42,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:29:42,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:29:42,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:29:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:42,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:43,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319893080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:43,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:43,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-25 17:29:43,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137310530] [2022-11-25 17:29:43,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:43,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:29:43,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:29:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:29:43,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:43,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 71.9) internal successors, (719), 10 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:43,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:43,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:43,263 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2022-11-25 17:29:43,263 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-11-25 17:29:43,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 161 events. 86/161 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 469 event pairs, 10 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 633. Up to 102 conditions per place. [2022-11-25 17:29:43,265 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 38 selfloop transitions, 9 changer transitions 1/48 dead transitions. [2022-11-25 17:29:43,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 329 flow [2022-11-25 17:29:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:29:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:29:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 599 transitions. [2022-11-25 17:29:43,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43531976744186046 [2022-11-25 17:29:43,268 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 599 transitions. [2022-11-25 17:29:43,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 599 transitions. [2022-11-25 17:29:43,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:43,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 599 transitions. [2022-11-25 17:29:43,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.875) internal successors, (599), 8 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,273 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,273 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 128 flow. Second operand 8 states and 599 transitions. [2022-11-25 17:29:43,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 329 flow [2022-11-25 17:29:43,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 312 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:43,279 INFO L231 Difference]: Finished difference. Result has 43 places, 25 transitions, 162 flow [2022-11-25 17:29:43,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=162, PETRI_PLACES=43, PETRI_TRANSITIONS=25} [2022-11-25 17:29:43,281 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-11-25 17:29:43,281 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 25 transitions, 162 flow [2022-11-25 17:29:43,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.9) internal successors, (719), 10 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:43,283 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:43,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:43,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2088665694, now seen corresponding path program 5 times [2022-11-25 17:29:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28312198] [2022-11-25 17:29:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:43,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28312198] [2022-11-25 17:29:43,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28312198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:43,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:43,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:29:43,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136777778] [2022-11-25 17:29:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:43,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:29:43,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:29:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:43,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-11-25 17:29:43,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 25 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:43,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-11-25 17:29:43,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:43,722 INFO L130 PetriNetUnfolder]: 84/159 cut-off events. [2022-11-25 17:29:43,722 INFO L131 PetriNetUnfolder]: For 468/468 co-relation queries the response was YES. [2022-11-25 17:29:43,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 159 events. 84/159 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 439 event pairs, 25 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 657. Up to 87 conditions per place. [2022-11-25 17:29:43,724 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 26 selfloop transitions, 9 changer transitions 2/37 dead transitions. [2022-11-25 17:29:43,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 291 flow [2022-11-25 17:29:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:29:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:29:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2022-11-25 17:29:43,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-11-25 17:29:43,726 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 380 transitions. [2022-11-25 17:29:43,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 380 transitions. [2022-11-25 17:29:43,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:43,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 380 transitions. [2022-11-25 17:29:43,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,730 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,730 INFO L175 Difference]: Start difference. First operand has 43 places, 25 transitions, 162 flow. Second operand 5 states and 380 transitions. [2022-11-25 17:29:43,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 291 flow [2022-11-25 17:29:43,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 267 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-25 17:29:43,734 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 190 flow [2022-11-25 17:29:43,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2022-11-25 17:29:43,734 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-11-25 17:29:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 190 flow [2022-11-25 17:29:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:43,735 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:43,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:29:43,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -897157326, now seen corresponding path program 6 times [2022-11-25 17:29:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:43,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485785894] [2022-11-25 17:29:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:43,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485785894] [2022-11-25 17:29:43,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485785894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:29:43,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:29:43,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:29:43,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440057388] [2022-11-25 17:29:43,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:29:43,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:29:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:43,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:29:43,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:43,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-11-25 17:29:43,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:43,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-11-25 17:29:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:43,904 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2022-11-25 17:29:43,904 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2022-11-25 17:29:43,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 140 events. 75/140 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 364 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 603. Up to 87 conditions per place. [2022-11-25 17:29:43,906 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2022-11-25 17:29:43,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 306 flow [2022-11-25 17:29:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:29:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:29:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2022-11-25 17:29:43,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2022-11-25 17:29:43,908 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2022-11-25 17:29:43,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2022-11-25 17:29:43,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:43,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2022-11-25 17:29:43,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,912 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 190 flow. Second operand 5 states and 382 transitions. [2022-11-25 17:29:43,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 306 flow [2022-11-25 17:29:43,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 295 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:43,915 INFO L231 Difference]: Finished difference. Result has 46 places, 26 transitions, 183 flow [2022-11-25 17:29:43,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=46, PETRI_TRANSITIONS=26} [2022-11-25 17:29:43,916 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2022-11-25 17:29:43,917 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 26 transitions, 183 flow [2022-11-25 17:29:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:43,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:43,917 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:43,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:29:43,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:43,918 INFO L85 PathProgramCache]: Analyzing trace with hash 343237214, now seen corresponding path program 1 times [2022-11-25 17:29:43,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:43,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427796835] [2022-11-25 17:29:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:43,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427796835] [2022-11-25 17:29:44,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427796835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462093926] [2022-11-25 17:29:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:44,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:44,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:44,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:44,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:29:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:29:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:44,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:44,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462093926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:44,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:44,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-11-25 17:29:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950327585] [2022-11-25 17:29:44,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:44,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:29:44,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:29:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:29:44,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-11-25 17:29:44,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 26 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:44,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:44,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-11-25 17:29:44,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:44,277 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2022-11-25 17:29:44,277 INFO L131 PetriNetUnfolder]: For 725/738 co-relation queries the response was YES. [2022-11-25 17:29:44,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 230 events. 122/230 cut-off events. For 725/738 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 776 event pairs, 16 based on Foata normal form. 18/246 useless extension candidates. Maximal degree in co-relation 955. Up to 113 conditions per place. [2022-11-25 17:29:44,280 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-11-25 17:29:44,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 386 flow [2022-11-25 17:29:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:29:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:29:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2022-11-25 17:29:44,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5043604651162791 [2022-11-25 17:29:44,282 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2022-11-25 17:29:44,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2022-11-25 17:29:44,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:44,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2022-11-25 17:29:44,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:44,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:44,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:44,285 INFO L175 Difference]: Start difference. First operand has 46 places, 26 transitions, 183 flow. Second operand 4 states and 347 transitions. [2022-11-25 17:29:44,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 386 flow [2022-11-25 17:29:44,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 335 flow, removed 5 selfloop flow, removed 7 redundant places. [2022-11-25 17:29:44,289 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 246 flow [2022-11-25 17:29:44,289 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2022-11-25 17:29:44,290 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-11-25 17:29:44,290 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 246 flow [2022-11-25 17:29:44,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:44,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:44,291 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:44,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:44,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:44,497 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 374703969, now seen corresponding path program 2 times [2022-11-25 17:29:44,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:44,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200284240] [2022-11-25 17:29:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:44,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:44,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:44,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200284240] [2022-11-25 17:29:44,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200284240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:44,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034526783] [2022-11-25 17:29:44,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:29:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:44,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:44,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:29:44,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:29:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:29:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:44,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034526783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:44,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-25 17:29:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312764624] [2022-11-25 17:29:44,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:29:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:29:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:29:44,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:44,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 246 flow. Second operand has 11 states, 11 states have (on average 71.18181818181819) internal successors, (783), 11 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:44,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:44,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:44,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:45,084 INFO L130 PetriNetUnfolder]: 162/305 cut-off events. [2022-11-25 17:29:45,084 INFO L131 PetriNetUnfolder]: For 677/677 co-relation queries the response was YES. [2022-11-25 17:29:45,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1290 conditions, 305 events. 162/305 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1124 event pairs, 29 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1276. Up to 161 conditions per place. [2022-11-25 17:29:45,087 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 46 selfloop transitions, 12 changer transitions 4/62 dead transitions. [2022-11-25 17:29:45,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 501 flow [2022-11-25 17:29:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:29:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:29:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 531 transitions. [2022-11-25 17:29:45,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4410299003322259 [2022-11-25 17:29:45,090 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 531 transitions. [2022-11-25 17:29:45,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 531 transitions. [2022-11-25 17:29:45,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:45,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 531 transitions. [2022-11-25 17:29:45,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,094 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,094 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 246 flow. Second operand 7 states and 531 transitions. [2022-11-25 17:29:45,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 501 flow [2022-11-25 17:29:45,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 487 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-25 17:29:45,098 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 333 flow [2022-11-25 17:29:45,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2022-11-25 17:29:45,099 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2022-11-25 17:29:45,099 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 333 flow [2022-11-25 17:29:45,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 71.18181818181819) internal successors, (783), 11 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:45,100 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:45,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:45,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:29:45,306 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1792112697, now seen corresponding path program 3 times [2022-11-25 17:29:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:45,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342892501] [2022-11-25 17:29:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342892501] [2022-11-25 17:29:45,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342892501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386928953] [2022-11-25 17:29:45,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:29:45,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:45,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:45,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:45,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:29:45,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:29:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:29:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:45,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:45,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386928953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:45,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:45,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 17:29:45,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445622066] [2022-11-25 17:29:45,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:45,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:29:45,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:29:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:29:45,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:45,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 333 flow. Second operand has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:45,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:45,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:46,125 INFO L130 PetriNetUnfolder]: 272/540 cut-off events. [2022-11-25 17:29:46,126 INFO L131 PetriNetUnfolder]: For 1770/1770 co-relation queries the response was YES. [2022-11-25 17:29:46,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 540 events. 272/540 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2522 event pairs, 5 based on Foata normal form. 16/556 useless extension candidates. Maximal degree in co-relation 2334. Up to 185 conditions per place. [2022-11-25 17:29:46,131 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 85 selfloop transitions, 51 changer transitions 7/143 dead transitions. [2022-11-25 17:29:46,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 1265 flow [2022-11-25 17:29:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:29:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:29:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1490 transitions. [2022-11-25 17:29:46,137 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2022-11-25 17:29:46,139 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1490 transitions. [2022-11-25 17:29:46,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1490 transitions. [2022-11-25 17:29:46,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:46,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1490 transitions. [2022-11-25 17:29:46,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 74.5) internal successors, (1490), 20 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:46,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:46,152 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:46,152 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 333 flow. Second operand 20 states and 1490 transitions. [2022-11-25 17:29:46,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 1265 flow [2022-11-25 17:29:46,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 143 transitions, 1222 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-25 17:29:46,164 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 886 flow [2022-11-25 17:29:46,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=886, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2022-11-25 17:29:46,166 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2022-11-25 17:29:46,166 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 886 flow [2022-11-25 17:29:46,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:46,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:46,167 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:46,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:46,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:29:46,373 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:46,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash 931454229, now seen corresponding path program 4 times [2022-11-25 17:29:46,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:46,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230365844] [2022-11-25 17:29:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:46,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:46,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230365844] [2022-11-25 17:29:46,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230365844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475481686] [2022-11-25 17:29:46,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:29:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:46,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:46,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:29:46,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:29:46,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:29:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:46,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:46,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475481686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:46,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:46,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-25 17:29:46,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803273370] [2022-11-25 17:29:46,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:46,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:29:46,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:29:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:29:46,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:46,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 886 flow. Second operand has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:46,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:46,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:47,079 INFO L130 PetriNetUnfolder]: 232/475 cut-off events. [2022-11-25 17:29:47,079 INFO L131 PetriNetUnfolder]: For 2724/2724 co-relation queries the response was YES. [2022-11-25 17:29:47,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 475 events. 232/475 cut-off events. For 2724/2724 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2239 event pairs, 7 based on Foata normal form. 34/509 useless extension candidates. Maximal degree in co-relation 2466. Up to 204 conditions per place. [2022-11-25 17:29:47,084 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 76 selfloop transitions, 46 changer transitions 7/129 dead transitions. [2022-11-25 17:29:47,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1393 flow [2022-11-25 17:29:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:29:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:29:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1054 transitions. [2022-11-25 17:29:47,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377076411960133 [2022-11-25 17:29:47,088 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1054 transitions. [2022-11-25 17:29:47,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1054 transitions. [2022-11-25 17:29:47,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:47,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1054 transitions. [2022-11-25 17:29:47,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 75.28571428571429) internal successors, (1054), 14 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:47,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:47,097 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:47,097 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 886 flow. Second operand 14 states and 1054 transitions. [2022-11-25 17:29:47,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1393 flow [2022-11-25 17:29:47,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1089 flow, removed 136 selfloop flow, removed 8 redundant places. [2022-11-25 17:29:47,119 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 764 flow [2022-11-25 17:29:47,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=764, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-11-25 17:29:47,120 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2022-11-25 17:29:47,120 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 764 flow [2022-11-25 17:29:47,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:47,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:47,121 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:47,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:29:47,332 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1349925145, now seen corresponding path program 5 times [2022-11-25 17:29:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272586026] [2022-11-25 17:29:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:47,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:47,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272586026] [2022-11-25 17:29:47,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272586026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:47,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507433004] [2022-11-25 17:29:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:29:47,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:47,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:47,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:29:47,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:29:47,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:29:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:47,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507433004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:47,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 17:29:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091779114] [2022-11-25 17:29:47,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:29:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:29:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:29:47,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:47,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 764 flow. Second operand has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:47,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:47,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:47,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:48,147 INFO L130 PetriNetUnfolder]: 294/606 cut-off events. [2022-11-25 17:29:48,148 INFO L131 PetriNetUnfolder]: For 2266/2266 co-relation queries the response was YES. [2022-11-25 17:29:48,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2666 conditions, 606 events. 294/606 cut-off events. For 2266/2266 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2975 event pairs, 63 based on Foata normal form. 42/648 useless extension candidates. Maximal degree in co-relation 2640. Up to 320 conditions per place. [2022-11-25 17:29:48,154 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 105 selfloop transitions, 47 changer transitions 3/155 dead transitions. [2022-11-25 17:29:48,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 155 transitions, 1544 flow [2022-11-25 17:29:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:29:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:29:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 988 transitions. [2022-11-25 17:29:48,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-11-25 17:29:48,160 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 988 transitions. [2022-11-25 17:29:48,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 988 transitions. [2022-11-25 17:29:48,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:48,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 988 transitions. [2022-11-25 17:29:48,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:48,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:48,173 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:48,173 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 764 flow. Second operand 13 states and 988 transitions. [2022-11-25 17:29:48,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 155 transitions, 1544 flow [2022-11-25 17:29:48,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 155 transitions, 1487 flow, removed 8 selfloop flow, removed 8 redundant places. [2022-11-25 17:29:48,189 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 1170 flow [2022-11-25 17:29:48,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1170, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2022-11-25 17:29:48,189 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2022-11-25 17:29:48,190 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 1170 flow [2022-11-25 17:29:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:48,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:48,191 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:48,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:29:48,397 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -818391913, now seen corresponding path program 6 times [2022-11-25 17:29:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:48,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693268537] [2022-11-25 17:29:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:48,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693268537] [2022-11-25 17:29:48,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693268537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800902942] [2022-11-25 17:29:48,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:29:48,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:48,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:48,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:29:48,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:29:48,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:29:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800902942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:48,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:48,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-25 17:29:48,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240638738] [2022-11-25 17:29:48,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:48,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:29:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:29:48,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:29:48,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:48,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 1170 flow. Second operand has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 13 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:48,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:48,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:48,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:49,223 INFO L130 PetriNetUnfolder]: 309/631 cut-off events. [2022-11-25 17:29:49,223 INFO L131 PetriNetUnfolder]: For 4275/4275 co-relation queries the response was YES. [2022-11-25 17:29:49,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 631 events. 309/631 cut-off events. For 4275/4275 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3137 event pairs, 28 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 3286. Up to 177 conditions per place. [2022-11-25 17:29:49,229 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 85 selfloop transitions, 69 changer transitions 8/162 dead transitions. [2022-11-25 17:29:49,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1912 flow [2022-11-25 17:29:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:29:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:29:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1259 transitions. [2022-11-25 17:29:49,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43057455540355677 [2022-11-25 17:29:49,233 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1259 transitions. [2022-11-25 17:29:49,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1259 transitions. [2022-11-25 17:29:49,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:49,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1259 transitions. [2022-11-25 17:29:49,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 74.05882352941177) internal successors, (1259), 17 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:49,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:49,244 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:49,244 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 1170 flow. Second operand 17 states and 1259 transitions. [2022-11-25 17:29:49,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1912 flow [2022-11-25 17:29:49,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 162 transitions, 1676 flow, removed 107 selfloop flow, removed 3 redundant places. [2022-11-25 17:29:49,271 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1296 flow [2022-11-25 17:29:49,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1296, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2022-11-25 17:29:49,272 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2022-11-25 17:29:49,272 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1296 flow [2022-11-25 17:29:49,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 13 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:49,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:49,273 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:49,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:29:49,484 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:49,484 INFO L85 PathProgramCache]: Analyzing trace with hash -721859541, now seen corresponding path program 7 times [2022-11-25 17:29:49,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:49,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684527673] [2022-11-25 17:29:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:49,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684527673] [2022-11-25 17:29:49,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684527673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927111472] [2022-11-25 17:29:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:29:49,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:49,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:49,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:29:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:29:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:49,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:29:49,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927111472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:49,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:49,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-25 17:29:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80494171] [2022-11-25 17:29:49,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:49,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:29:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:29:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:29:49,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-11-25 17:29:49,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1296 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:49,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:49,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-11-25 17:29:49,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:50,193 INFO L130 PetriNetUnfolder]: 525/1068 cut-off events. [2022-11-25 17:29:50,193 INFO L131 PetriNetUnfolder]: For 6814/6825 co-relation queries the response was YES. [2022-11-25 17:29:50,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 1068 events. 525/1068 cut-off events. For 6814/6825 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6177 event pairs, 57 based on Foata normal form. 30/1096 useless extension candidates. Maximal degree in co-relation 5738. Up to 464 conditions per place. [2022-11-25 17:29:50,205 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 124 selfloop transitions, 58 changer transitions 47/236 dead transitions. [2022-11-25 17:29:50,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 236 transitions, 2950 flow [2022-11-25 17:29:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:29:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:29:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2022-11-25 17:29:50,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2022-11-25 17:29:50,208 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2022-11-25 17:29:50,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2022-11-25 17:29:50,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:50,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2022-11-25 17:29:50,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:50,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:50,211 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:50,211 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1296 flow. Second operand 5 states and 436 transitions. [2022-11-25 17:29:50,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 236 transitions, 2950 flow [2022-11-25 17:29:50,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 236 transitions, 2778 flow, removed 67 selfloop flow, removed 3 redundant places. [2022-11-25 17:29:50,242 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1954 flow [2022-11-25 17:29:50,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1954, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2022-11-25 17:29:50,243 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2022-11-25 17:29:50,243 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1954 flow [2022-11-25 17:29:50,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:50,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:50,244 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:50,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:50,450 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1891302274, now seen corresponding path program 8 times [2022-11-25 17:29:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443234146] [2022-11-25 17:29:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:50,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:50,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443234146] [2022-11-25 17:29:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443234146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995532768] [2022-11-25 17:29:50,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:29:50,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:50,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:50,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:50,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:29:50,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:29:50,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:29:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:50,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:50,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995532768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:50,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:50,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-25 17:29:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476882915] [2022-11-25 17:29:50,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:50,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:29:50,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:29:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:29:50,893 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:50,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1954 flow. Second operand has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:50,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:50,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:51,879 INFO L130 PetriNetUnfolder]: 680/1466 cut-off events. [2022-11-25 17:29:51,880 INFO L131 PetriNetUnfolder]: For 12265/12265 co-relation queries the response was YES. [2022-11-25 17:29:51,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8580 conditions, 1466 events. 680/1466 cut-off events. For 12265/12265 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9559 event pairs, 15 based on Foata normal form. 24/1490 useless extension candidates. Maximal degree in co-relation 8537. Up to 331 conditions per place. [2022-11-25 17:29:51,898 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 152 selfloop transitions, 156 changer transitions 21/329 dead transitions. [2022-11-25 17:29:51,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 329 transitions, 4269 flow [2022-11-25 17:29:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:29:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 17:29:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2451 transitions. [2022-11-25 17:29:51,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2022-11-25 17:29:51,903 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2451 transitions. [2022-11-25 17:29:51,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2451 transitions. [2022-11-25 17:29:51,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:51,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2451 transitions. [2022-11-25 17:29:51,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 74.27272727272727) internal successors, (2451), 33 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:51,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 172.0) internal successors, (5848), 34 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:51,935 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 172.0) internal successors, (5848), 34 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:51,935 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1954 flow. Second operand 33 states and 2451 transitions. [2022-11-25 17:29:51,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 329 transitions, 4269 flow [2022-11-25 17:29:51,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 329 transitions, 4101 flow, removed 62 selfloop flow, removed 1 redundant places. [2022-11-25 17:29:51,999 INFO L231 Difference]: Finished difference. Result has 160 places, 224 transitions, 3493 flow [2022-11-25 17:29:52,000 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3493, PETRI_PLACES=160, PETRI_TRANSITIONS=224} [2022-11-25 17:29:52,000 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2022-11-25 17:29:52,001 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 224 transitions, 3493 flow [2022-11-25 17:29:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:52,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:52,002 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:52,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:52,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:52,213 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1933440930, now seen corresponding path program 9 times [2022-11-25 17:29:52,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:52,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13962557] [2022-11-25 17:29:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:52,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:52,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13962557] [2022-11-25 17:29:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13962557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873878106] [2022-11-25 17:29:52,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:29:52,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:52,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:52,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:29:52,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:29:52,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:29:52,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:52,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:52,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873878106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:52,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:52,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-25 17:29:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852099662] [2022-11-25 17:29:52,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:29:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:29:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:29:52,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:52,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 224 transitions, 3493 flow. Second operand has 14 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:52,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:52,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:52,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:53,341 INFO L130 PetriNetUnfolder]: 767/1617 cut-off events. [2022-11-25 17:29:53,341 INFO L131 PetriNetUnfolder]: For 23983/23983 co-relation queries the response was YES. [2022-11-25 17:29:53,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 1617 events. 767/1617 cut-off events. For 23983/23983 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10658 event pairs, 79 based on Foata normal form. 36/1653 useless extension candidates. Maximal degree in co-relation 11104. Up to 1257 conditions per place. [2022-11-25 17:29:53,363 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 239 selfloop transitions, 50 changer transitions 24/313 dead transitions. [2022-11-25 17:29:53,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 313 transitions, 5331 flow [2022-11-25 17:29:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:29:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:29:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2022-11-25 17:29:53,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43992248062015504 [2022-11-25 17:29:53,366 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2022-11-25 17:29:53,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2022-11-25 17:29:53,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:53,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2022-11-25 17:29:53,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:53,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:53,371 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:53,371 INFO L175 Difference]: Start difference. First operand has 160 places, 224 transitions, 3493 flow. Second operand 9 states and 681 transitions. [2022-11-25 17:29:53,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 313 transitions, 5331 flow [2022-11-25 17:29:53,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 313 transitions, 4345 flow, removed 418 selfloop flow, removed 12 redundant places. [2022-11-25 17:29:53,551 INFO L231 Difference]: Finished difference. Result has 158 places, 252 transitions, 3406 flow [2022-11-25 17:29:53,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3406, PETRI_PLACES=158, PETRI_TRANSITIONS=252} [2022-11-25 17:29:53,552 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2022-11-25 17:29:53,552 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 252 transitions, 3406 flow [2022-11-25 17:29:53,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:53,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:53,552 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:53,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:53,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:53,758 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1797113008, now seen corresponding path program 10 times [2022-11-25 17:29:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:53,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570845233] [2022-11-25 17:29:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:53,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570845233] [2022-11-25 17:29:53,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570845233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675802583] [2022-11-25 17:29:53,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:29:53,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:53,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:53,897 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:53,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:29:53,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:29:53,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:53,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:29:53,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:54,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675802583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:54,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:54,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 17:29:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009944271] [2022-11-25 17:29:54,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:54,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:29:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:29:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:29:54,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:54,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 252 transitions, 3406 flow. Second operand has 16 states, 16 states have (on average 71.0625) internal successors, (1137), 16 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:54,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:54,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:54,964 INFO L130 PetriNetUnfolder]: 934/1910 cut-off events. [2022-11-25 17:29:54,964 INFO L131 PetriNetUnfolder]: For 27023/27023 co-relation queries the response was YES. [2022-11-25 17:29:54,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12396 conditions, 1910 events. 934/1910 cut-off events. For 27023/27023 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12736 event pairs, 73 based on Foata normal form. 78/1988 useless extension candidates. Maximal degree in co-relation 12340. Up to 1501 conditions per place. [2022-11-25 17:29:54,993 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 271 selfloop transitions, 90 changer transitions 3/364 dead transitions. [2022-11-25 17:29:54,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 364 transitions, 5455 flow [2022-11-25 17:29:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:29:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:29:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1052 transitions. [2022-11-25 17:29:54,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368770764119601 [2022-11-25 17:29:54,996 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1052 transitions. [2022-11-25 17:29:54,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1052 transitions. [2022-11-25 17:29:54,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:54,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1052 transitions. [2022-11-25 17:29:54,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 75.14285714285714) internal successors, (1052), 14 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) [2022-11-25 17:29:55,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:55,003 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:55,003 INFO L175 Difference]: Start difference. First operand has 158 places, 252 transitions, 3406 flow. Second operand 14 states and 1052 transitions. [2022-11-25 17:29:55,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 364 transitions, 5455 flow [2022-11-25 17:29:55,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 364 transitions, 5381 flow, removed 28 selfloop flow, removed 4 redundant places. [2022-11-25 17:29:55,218 INFO L231 Difference]: Finished difference. Result has 172 places, 300 transitions, 4486 flow [2022-11-25 17:29:55,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4486, PETRI_PLACES=172, PETRI_TRANSITIONS=300} [2022-11-25 17:29:55,219 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 143 predicate places. [2022-11-25 17:29:55,219 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 300 transitions, 4486 flow [2022-11-25 17:29:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 71.0625) internal successors, (1137), 16 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:55,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:55,220 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:55,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:29:55,426 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1963576040, now seen corresponding path program 11 times [2022-11-25 17:29:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:55,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429177564] [2022-11-25 17:29:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:55,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429177564] [2022-11-25 17:29:55,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429177564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882696650] [2022-11-25 17:29:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:29:55,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:55,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:55,540 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:55,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:29:55,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 17:29:55,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:55,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:29:55,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:55,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:55,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882696650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:55,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:55,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-25 17:29:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672463055] [2022-11-25 17:29:55,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:55,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:29:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:29:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:29:55,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:55,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 300 transitions, 4486 flow. Second operand has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:55,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:55,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:55,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:56,832 INFO L130 PetriNetUnfolder]: 898/1821 cut-off events. [2022-11-25 17:29:56,832 INFO L131 PetriNetUnfolder]: For 29379/29379 co-relation queries the response was YES. [2022-11-25 17:29:56,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 1821 events. 898/1821 cut-off events. For 29379/29379 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11851 event pairs, 29 based on Foata normal form. 62/1883 useless extension candidates. Maximal degree in co-relation 12570. Up to 592 conditions per place. [2022-11-25 17:29:56,866 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 178 selfloop transitions, 189 changer transitions 1/368 dead transitions. [2022-11-25 17:29:56,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 368 transitions, 5694 flow [2022-11-25 17:29:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:29:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:29:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1646 transitions. [2022-11-25 17:29:56,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4349894291754757 [2022-11-25 17:29:56,872 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1646 transitions. [2022-11-25 17:29:56,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1646 transitions. [2022-11-25 17:29:56,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:56,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1646 transitions. [2022-11-25 17:29:56,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 74.81818181818181) internal successors, (1646), 22 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:56,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 172.0) internal successors, (3956), 23 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:56,883 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 172.0) internal successors, (3956), 23 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:56,883 INFO L175 Difference]: Start difference. First operand has 172 places, 300 transitions, 4486 flow. Second operand 22 states and 1646 transitions. [2022-11-25 17:29:56,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 368 transitions, 5694 flow [2022-11-25 17:29:57,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 368 transitions, 5457 flow, removed 100 selfloop flow, removed 7 redundant places. [2022-11-25 17:29:57,080 INFO L231 Difference]: Finished difference. Result has 187 places, 297 transitions, 4756 flow [2022-11-25 17:29:57,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4756, PETRI_PLACES=187, PETRI_TRANSITIONS=297} [2022-11-25 17:29:57,081 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2022-11-25 17:29:57,082 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 297 transitions, 4756 flow [2022-11-25 17:29:57,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:57,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:57,082 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:57,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:57,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 17:29:57,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 405895162, now seen corresponding path program 12 times [2022-11-25 17:29:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657041090] [2022-11-25 17:29:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:57,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657041090] [2022-11-25 17:29:57,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657041090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88594897] [2022-11-25 17:29:57,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:29:57,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:57,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:57,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:29:57,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:29:57,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:57,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:29:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:57,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:57,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88594897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:57,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:57,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-25 17:29:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223932524] [2022-11-25 17:29:57,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:57,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:29:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:29:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:29:57,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:29:57,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 297 transitions, 4756 flow. Second operand has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:57,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:57,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:29:57,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:59,122 INFO L130 PetriNetUnfolder]: 1322/2652 cut-off events. [2022-11-25 17:29:59,122 INFO L131 PetriNetUnfolder]: For 42265/42265 co-relation queries the response was YES. [2022-11-25 17:29:59,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19152 conditions, 2652 events. 1322/2652 cut-off events. For 42265/42265 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18480 event pairs, 61 based on Foata normal form. 74/2726 useless extension candidates. Maximal degree in co-relation 19092. Up to 1100 conditions per place. [2022-11-25 17:29:59,160 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 245 selfloop transitions, 274 changer transitions 8/527 dead transitions. [2022-11-25 17:29:59,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 527 transitions, 9058 flow [2022-11-25 17:29:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:29:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:29:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1575 transitions. [2022-11-25 17:29:59,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2022-11-25 17:29:59,164 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1575 transitions. [2022-11-25 17:29:59,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1575 transitions. [2022-11-25 17:29:59,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:59,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1575 transitions. [2022-11-25 17:29:59,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.0) internal successors, (1575), 21 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:59,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:59,174 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:59,174 INFO L175 Difference]: Start difference. First operand has 187 places, 297 transitions, 4756 flow. Second operand 21 states and 1575 transitions. [2022-11-25 17:29:59,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 527 transitions, 9058 flow [2022-11-25 17:29:59,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 527 transitions, 8660 flow, removed 67 selfloop flow, removed 16 redundant places. [2022-11-25 17:29:59,460 INFO L231 Difference]: Finished difference. Result has 199 places, 431 transitions, 7833 flow [2022-11-25 17:29:59,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7833, PETRI_PLACES=199, PETRI_TRANSITIONS=431} [2022-11-25 17:29:59,461 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2022-11-25 17:29:59,461 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 431 transitions, 7833 flow [2022-11-25 17:29:59,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:59,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:59,462 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:59,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:29:59,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:29:59,662 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:29:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1001336486, now seen corresponding path program 13 times [2022-11-25 17:29:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:59,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296902868] [2022-11-25 17:29:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:29:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296902868] [2022-11-25 17:29:59,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296902868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503773068] [2022-11-25 17:29:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:29:59,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:59,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:59,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:59,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:29:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:29:59,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:00,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:00,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503773068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:00,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-25 17:30:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96204676] [2022-11-25 17:30:00,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:00,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:30:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:30:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:30:00,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:00,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 431 transitions, 7833 flow. Second operand has 20 states, 20 states have (on average 70.6) internal successors, (1412), 20 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:00,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:00,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:00,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:01,564 INFO L130 PetriNetUnfolder]: 1429/2857 cut-off events. [2022-11-25 17:30:01,564 INFO L131 PetriNetUnfolder]: For 62408/62408 co-relation queries the response was YES. [2022-11-25 17:30:01,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22780 conditions, 2857 events. 1429/2857 cut-off events. For 62408/62408 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19958 event pairs, 428 based on Foata normal form. 104/2961 useless extension candidates. Maximal degree in co-relation 22712. Up to 2077 conditions per place. [2022-11-25 17:30:01,605 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 424 selfloop transitions, 133 changer transitions 14/571 dead transitions. [2022-11-25 17:30:01,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 571 transitions, 10775 flow [2022-11-25 17:30:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:30:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:30:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1590 transitions. [2022-11-25 17:30:01,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44019933554817275 [2022-11-25 17:30:01,610 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1590 transitions. [2022-11-25 17:30:01,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1590 transitions. [2022-11-25 17:30:01,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:01,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1590 transitions. [2022-11-25 17:30:01,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.71428571428571) internal successors, (1590), 21 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:01,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:01,693 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:01,693 INFO L175 Difference]: Start difference. First operand has 199 places, 431 transitions, 7833 flow. Second operand 21 states and 1590 transitions. [2022-11-25 17:30:01,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 571 transitions, 10775 flow [2022-11-25 17:30:02,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 571 transitions, 10362 flow, removed 180 selfloop flow, removed 8 redundant places. [2022-11-25 17:30:02,090 INFO L231 Difference]: Finished difference. Result has 221 places, 482 transitions, 9148 flow [2022-11-25 17:30:02,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9148, PETRI_PLACES=221, PETRI_TRANSITIONS=482} [2022-11-25 17:30:02,091 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2022-11-25 17:30:02,091 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 482 transitions, 9148 flow [2022-11-25 17:30:02,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.6) internal successors, (1412), 20 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:02,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:02,092 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:02,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:02,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1012599990, now seen corresponding path program 14 times [2022-11-25 17:30:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:02,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403665590] [2022-11-25 17:30:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403665590] [2022-11-25 17:30:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403665590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547438624] [2022-11-25 17:30:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:30:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:02,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:30:02,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:30:02,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:02,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:30:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:02,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:02,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547438624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:02,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:02,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-11-25 17:30:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806304590] [2022-11-25 17:30:02,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:02,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:30:02,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:30:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:30:02,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:02,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 482 transitions, 9148 flow. Second operand has 17 states, 17 states have (on average 70.76470588235294) internal successors, (1203), 17 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:02,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:02,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:02,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:04,303 INFO L130 PetriNetUnfolder]: 1464/2908 cut-off events. [2022-11-25 17:30:04,303 INFO L131 PetriNetUnfolder]: For 69789/69789 co-relation queries the response was YES. [2022-11-25 17:30:04,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23928 conditions, 2908 events. 1464/2908 cut-off events. For 69789/69789 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20316 event pairs, 169 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 23850. Up to 922 conditions per place. [2022-11-25 17:30:04,351 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 298 selfloop transitions, 271 changer transitions 11/580 dead transitions. [2022-11-25 17:30:04,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 580 transitions, 11440 flow [2022-11-25 17:30:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:30:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:30:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1915 transitions. [2022-11-25 17:30:04,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4282200357781753 [2022-11-25 17:30:04,356 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1915 transitions. [2022-11-25 17:30:04,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1915 transitions. [2022-11-25 17:30:04,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:04,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1915 transitions. [2022-11-25 17:30:04,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.65384615384616) internal successors, (1915), 26 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:04,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:04,367 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:04,368 INFO L175 Difference]: Start difference. First operand has 221 places, 482 transitions, 9148 flow. Second operand 26 states and 1915 transitions. [2022-11-25 17:30:04,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 580 transitions, 11440 flow [2022-11-25 17:30:05,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 580 transitions, 10273 flow, removed 579 selfloop flow, removed 3 redundant places. [2022-11-25 17:30:05,179 INFO L231 Difference]: Finished difference. Result has 247 places, 515 transitions, 9320 flow [2022-11-25 17:30:05,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9320, PETRI_PLACES=247, PETRI_TRANSITIONS=515} [2022-11-25 17:30:05,180 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2022-11-25 17:30:05,180 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 515 transitions, 9320 flow [2022-11-25 17:30:05,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.76470588235294) internal successors, (1203), 17 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:05,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:05,181 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:05,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:05,382 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -428015554, now seen corresponding path program 15 times [2022-11-25 17:30:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:05,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945709246] [2022-11-25 17:30:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:05,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:30:05,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:05,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945709246] [2022-11-25 17:30:05,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945709246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:05,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942126208] [2022-11-25 17:30:05,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:30:05,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:05,523 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:05,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:30:05,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:30:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:05,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:30:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:30:05,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:30:05,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942126208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:05,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:05,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-25 17:30:05,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070406589] [2022-11-25 17:30:05,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:05,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:30:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:30:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:30:05,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-11-25 17:30:05,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 515 transitions, 9320 flow. Second operand has 6 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:05,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:05,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-11-25 17:30:05,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:07,237 INFO L130 PetriNetUnfolder]: 2182/4290 cut-off events. [2022-11-25 17:30:07,237 INFO L131 PetriNetUnfolder]: For 92577/92587 co-relation queries the response was YES. [2022-11-25 17:30:07,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34584 conditions, 4290 events. 2182/4290 cut-off events. For 92577/92587 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 32228 event pairs, 197 based on Foata normal form. 35/4323 useless extension candidates. Maximal degree in co-relation 34501. Up to 2162 conditions per place. [2022-11-25 17:30:07,303 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 469 selfloop transitions, 286 changer transitions 101/864 dead transitions. [2022-11-25 17:30:07,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 864 transitions, 16920 flow [2022-11-25 17:30:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:30:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:30:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 525 transitions. [2022-11-25 17:30:07,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5087209302325582 [2022-11-25 17:30:07,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 525 transitions. [2022-11-25 17:30:07,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 525 transitions. [2022-11-25 17:30:07,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:07,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 525 transitions. [2022-11-25 17:30:07,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.5) internal successors, (525), 6 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:07,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:07,317 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:07,317 INFO L175 Difference]: Start difference. First operand has 247 places, 515 transitions, 9320 flow. Second operand 6 states and 525 transitions. [2022-11-25 17:30:07,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 864 transitions, 16920 flow [2022-11-25 17:30:08,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 864 transitions, 16376 flow, removed 222 selfloop flow, removed 8 redundant places. [2022-11-25 17:30:08,303 INFO L231 Difference]: Finished difference. Result has 247 places, 684 transitions, 13475 flow [2022-11-25 17:30:08,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=9041, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13475, PETRI_PLACES=247, PETRI_TRANSITIONS=684} [2022-11-25 17:30:08,304 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2022-11-25 17:30:08,304 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 684 transitions, 13475 flow [2022-11-25 17:30:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:08,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:08,304 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:08,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:08,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:30:08,510 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1253781917, now seen corresponding path program 16 times [2022-11-25 17:30:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:08,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610816414] [2022-11-25 17:30:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:08,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:08,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:08,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610816414] [2022-11-25 17:30:08,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610816414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306685993] [2022-11-25 17:30:08,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:30:08,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:08,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:08,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:08,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:30:08,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:30:08,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:08,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306685993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:08,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-25 17:30:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869036952] [2022-11-25 17:30:08,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:08,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:30:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:30:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:30:08,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:08,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 684 transitions, 13475 flow. Second operand has 17 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:08,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:08,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:08,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:10,988 INFO L130 PetriNetUnfolder]: 2484/4916 cut-off events. [2022-11-25 17:30:10,988 INFO L131 PetriNetUnfolder]: For 122111/122111 co-relation queries the response was YES. [2022-11-25 17:30:11,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42200 conditions, 4916 events. 2484/4916 cut-off events. For 122111/122111 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38046 event pairs, 217 based on Foata normal form. 50/4966 useless extension candidates. Maximal degree in co-relation 42113. Up to 3712 conditions per place. [2022-11-25 17:30:11,062 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 697 selfloop transitions, 187 changer transitions 49/933 dead transitions. [2022-11-25 17:30:11,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 933 transitions, 19848 flow [2022-11-25 17:30:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:30:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:30:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 836 transitions. [2022-11-25 17:30:11,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-11-25 17:30:11,065 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 836 transitions. [2022-11-25 17:30:11,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 836 transitions. [2022-11-25 17:30:11,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:11,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 836 transitions. [2022-11-25 17:30:11,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.0) internal successors, (836), 11 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:11,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 172.0) internal successors, (2064), 12 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:11,071 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 172.0) internal successors, (2064), 12 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:11,071 INFO L175 Difference]: Start difference. First operand has 247 places, 684 transitions, 13475 flow. Second operand 11 states and 836 transitions. [2022-11-25 17:30:11,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 933 transitions, 19848 flow [2022-11-25 17:30:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 933 transitions, 19428 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-11-25 17:30:12,412 INFO L231 Difference]: Finished difference. Result has 263 places, 808 transitions, 16842 flow [2022-11-25 17:30:12,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=13113, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16842, PETRI_PLACES=263, PETRI_TRANSITIONS=808} [2022-11-25 17:30:12,413 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 234 predicate places. [2022-11-25 17:30:12,413 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 808 transitions, 16842 flow [2022-11-25 17:30:12,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:12,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:12,414 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:12,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:30:12,619 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash -147953965, now seen corresponding path program 17 times [2022-11-25 17:30:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:12,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785924704] [2022-11-25 17:30:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:12,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:12,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:12,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785924704] [2022-11-25 17:30:12,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785924704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350700436] [2022-11-25 17:30:12,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:30:12,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:12,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:12,773 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:12,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:30:12,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 17:30:12,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:12,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:12,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:12,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350700436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:13,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:13,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-25 17:30:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115576043] [2022-11-25 17:30:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:30:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:30:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:30:13,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:13,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 808 transitions, 16842 flow. Second operand has 19 states, 19 states have (on average 70.63157894736842) internal successors, (1342), 19 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:13,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:13,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:13,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:16,110 INFO L130 PetriNetUnfolder]: 2839/5577 cut-off events. [2022-11-25 17:30:16,110 INFO L131 PetriNetUnfolder]: For 153006/153006 co-relation queries the response was YES. [2022-11-25 17:30:16,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49105 conditions, 5577 events. 2839/5577 cut-off events. For 153006/153006 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 43555 event pairs, 199 based on Foata normal form. 84/5661 useless extension candidates. Maximal degree in co-relation 49011. Up to 4193 conditions per place. [2022-11-25 17:30:16,177 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 763 selfloop transitions, 252 changer transitions 16/1031 dead transitions. [2022-11-25 17:30:16,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1031 transitions, 22759 flow [2022-11-25 17:30:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:30:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:30:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1280 transitions. [2022-11-25 17:30:16,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377564979480164 [2022-11-25 17:30:16,180 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1280 transitions. [2022-11-25 17:30:16,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1280 transitions. [2022-11-25 17:30:16,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:16,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1280 transitions. [2022-11-25 17:30:16,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 75.29411764705883) internal successors, (1280), 17 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:16,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:16,188 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:16,188 INFO L175 Difference]: Start difference. First operand has 263 places, 808 transitions, 16842 flow. Second operand 17 states and 1280 transitions. [2022-11-25 17:30:16,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1031 transitions, 22759 flow [2022-11-25 17:30:18,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1031 transitions, 22538 flow, removed 93 selfloop flow, removed 4 redundant places. [2022-11-25 17:30:18,104 INFO L231 Difference]: Finished difference. Result has 281 places, 908 transitions, 19909 flow [2022-11-25 17:30:18,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=16695, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19909, PETRI_PLACES=281, PETRI_TRANSITIONS=908} [2022-11-25 17:30:18,105 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 252 predicate places. [2022-11-25 17:30:18,105 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 908 transitions, 19909 flow [2022-11-25 17:30:18,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.63157894736842) internal successors, (1342), 19 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:18,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:18,106 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:18,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:18,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:30:18,312 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash 936063221, now seen corresponding path program 18 times [2022-11-25 17:30:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531360350] [2022-11-25 17:30:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:18,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:18,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531360350] [2022-11-25 17:30:18,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531360350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754809583] [2022-11-25 17:30:18,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:30:18,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:18,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:18,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:30:18,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 17:30:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:18,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754809583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:18,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:18,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-11-25 17:30:18,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871990221] [2022-11-25 17:30:18,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:18,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:30:18,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:18,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:30:18,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:30:18,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:18,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 908 transitions, 19909 flow. Second operand has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:18,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:18,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:18,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:22,579 INFO L130 PetriNetUnfolder]: 3293/6530 cut-off events. [2022-11-25 17:30:22,579 INFO L131 PetriNetUnfolder]: For 222819/222819 co-relation queries the response was YES. [2022-11-25 17:30:22,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60754 conditions, 6530 events. 3293/6530 cut-off events. For 222819/222819 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 52872 event pairs, 97 based on Foata normal form. 124/6654 useless extension candidates. Maximal degree in co-relation 60655. Up to 1756 conditions per place. [2022-11-25 17:30:22,664 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 434 selfloop transitions, 751 changer transitions 41/1226 dead transitions. [2022-11-25 17:30:22,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1226 transitions, 27659 flow [2022-11-25 17:30:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:30:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 17:30:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2641 transitions. [2022-11-25 17:30:22,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43870431893687706 [2022-11-25 17:30:22,669 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2641 transitions. [2022-11-25 17:30:22,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2641 transitions. [2022-11-25 17:30:22,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:22,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2641 transitions. [2022-11-25 17:30:22,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 75.45714285714286) internal successors, (2641), 35 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:22,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:22,685 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:22,686 INFO L175 Difference]: Start difference. First operand has 281 places, 908 transitions, 19909 flow. Second operand 35 states and 2641 transitions. [2022-11-25 17:30:22,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1226 transitions, 27659 flow [2022-11-25 17:30:25,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1226 transitions, 27164 flow, removed 222 selfloop flow, removed 5 redundant places. [2022-11-25 17:30:25,383 INFO L231 Difference]: Finished difference. Result has 320 places, 1032 transitions, 25151 flow [2022-11-25 17:30:25,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=19502, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=25151, PETRI_PLACES=320, PETRI_TRANSITIONS=1032} [2022-11-25 17:30:25,386 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 291 predicate places. [2022-11-25 17:30:25,392 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1032 transitions, 25151 flow [2022-11-25 17:30:25,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:25,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:25,393 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:25,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:25,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:25,604 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1796721689, now seen corresponding path program 19 times [2022-11-25 17:30:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:25,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823618655] [2022-11-25 17:30:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:25,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:25,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:25,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823618655] [2022-11-25 17:30:25,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823618655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:25,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209579110] [2022-11-25 17:30:25,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:30:25,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:25,731 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:25,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:30:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:25,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:25,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209579110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:25,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:25,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-11-25 17:30:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479858571] [2022-11-25 17:30:25,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:25,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:30:25,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:30:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:30:26,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:26,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1032 transitions, 25151 flow. Second operand has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:26,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:26,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:26,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:30,486 INFO L130 PetriNetUnfolder]: 3260/6429 cut-off events. [2022-11-25 17:30:30,486 INFO L131 PetriNetUnfolder]: For 244069/244069 co-relation queries the response was YES. [2022-11-25 17:30:30,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64322 conditions, 6429 events. 3260/6429 cut-off events. For 244069/244069 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 51645 event pairs, 75 based on Foata normal form. 16/6445 useless extension candidates. Maximal degree in co-relation 64213. Up to 1764 conditions per place. [2022-11-25 17:30:30,564 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 299 selfloop transitions, 873 changer transitions 44/1216 dead transitions. [2022-11-25 17:30:30,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1216 transitions, 29745 flow [2022-11-25 17:30:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 17:30:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-25 17:30:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3391 transitions. [2022-11-25 17:30:30,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42858948432760363 [2022-11-25 17:30:30,570 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3391 transitions. [2022-11-25 17:30:30,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3391 transitions. [2022-11-25 17:30:30,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:30,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3391 transitions. [2022-11-25 17:30:30,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 73.71739130434783) internal successors, (3391), 46 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:30,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 172.0) internal successors, (8084), 47 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:30,584 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 172.0) internal successors, (8084), 47 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:30,584 INFO L175 Difference]: Start difference. First operand has 320 places, 1032 transitions, 25151 flow. Second operand 46 states and 3391 transitions. [2022-11-25 17:30:30,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1216 transitions, 29745 flow [2022-11-25 17:30:33,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1216 transitions, 27239 flow, removed 875 selfloop flow, removed 21 redundant places. [2022-11-25 17:30:33,682 INFO L231 Difference]: Finished difference. Result has 345 places, 1073 transitions, 25329 flow [2022-11-25 17:30:33,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=22657, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=836, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=25329, PETRI_PLACES=345, PETRI_TRANSITIONS=1073} [2022-11-25 17:30:33,684 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 316 predicate places. [2022-11-25 17:30:33,684 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1073 transitions, 25329 flow [2022-11-25 17:30:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:33,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:33,685 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:33,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:33,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:33,891 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2109771939, now seen corresponding path program 20 times [2022-11-25 17:30:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:33,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807826703] [2022-11-25 17:30:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:34,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:34,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807826703] [2022-11-25 17:30:34,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807826703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:34,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569971955] [2022-11-25 17:30:34,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:30:34,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:34,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:34,054 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:30:34,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:30:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:34,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:34,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569971955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:34,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:34,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-25 17:30:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465328787] [2022-11-25 17:30:34,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:30:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:30:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:30:34,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:34,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1073 transitions, 25329 flow. Second operand has 21 states, 21 states have (on average 70.85714285714286) internal successors, (1488), 21 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:34,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:34,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:39,657 INFO L130 PetriNetUnfolder]: 4238/8149 cut-off events. [2022-11-25 17:30:39,658 INFO L131 PetriNetUnfolder]: For 289063/289063 co-relation queries the response was YES. [2022-11-25 17:30:39,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80979 conditions, 8149 events. 4238/8149 cut-off events. For 289063/289063 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 66631 event pairs, 233 based on Foata normal form. 126/8275 useless extension candidates. Maximal degree in co-relation 80874. Up to 4898 conditions per place. [2022-11-25 17:30:39,790 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 982 selfloop transitions, 606 changer transitions 12/1600 dead transitions. [2022-11-25 17:30:39,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1600 transitions, 39793 flow [2022-11-25 17:30:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:30:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:30:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2105 transitions. [2022-11-25 17:30:39,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4370847176079734 [2022-11-25 17:30:39,796 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2105 transitions. [2022-11-25 17:30:39,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2105 transitions. [2022-11-25 17:30:39,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:39,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2105 transitions. [2022-11-25 17:30:39,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 75.17857142857143) internal successors, (2105), 28 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:39,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 172.0) internal successors, (4988), 29 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:39,805 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 172.0) internal successors, (4988), 29 states have internal predecessors, (4988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:39,805 INFO L175 Difference]: Start difference. First operand has 345 places, 1073 transitions, 25329 flow. Second operand 28 states and 2105 transitions. [2022-11-25 17:30:39,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1600 transitions, 39793 flow [2022-11-25 17:30:44,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1600 transitions, 38399 flow, removed 522 selfloop flow, removed 14 redundant places. [2022-11-25 17:30:44,864 INFO L231 Difference]: Finished difference. Result has 363 places, 1386 transitions, 34465 flow [2022-11-25 17:30:44,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=24365, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=34465, PETRI_PLACES=363, PETRI_TRANSITIONS=1386} [2022-11-25 17:30:44,866 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 334 predicate places. [2022-11-25 17:30:44,866 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1386 transitions, 34465 flow [2022-11-25 17:30:44,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.85714285714286) internal successors, (1488), 21 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:44,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:44,866 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:44,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:45,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:30:45,072 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:30:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:45,072 INFO L85 PathProgramCache]: Analyzing trace with hash -453459985, now seen corresponding path program 21 times [2022-11-25 17:30:45,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:45,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581031080] [2022-11-25 17:30:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:45,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581031080] [2022-11-25 17:30:45,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581031080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733013062] [2022-11-25 17:30:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:30:45,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:45,219 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:45,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:30:45,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:30:45,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:30:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:45,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:45,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733013062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:45,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:45,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-11-25 17:30:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716076349] [2022-11-25 17:30:45,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:45,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:30:45,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:30:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:30:45,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:30:45,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1386 transitions, 34465 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:45,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:45,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:30:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:51,263 INFO L130 PetriNetUnfolder]: 4908/9449 cut-off events. [2022-11-25 17:30:51,263 INFO L131 PetriNetUnfolder]: For 372613/372613 co-relation queries the response was YES. [2022-11-25 17:30:51,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96942 conditions, 9449 events. 4908/9449 cut-off events. For 372613/372613 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 79719 event pairs, 213 based on Foata normal form. 140/9589 useless extension candidates. Maximal degree in co-relation 96830. Up to 4170 conditions per place. [2022-11-25 17:30:51,456 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 834 selfloop transitions, 936 changer transitions 15/1785 dead transitions. [2022-11-25 17:30:51,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1785 transitions, 46355 flow [2022-11-25 17:30:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:30:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:30:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1953 transitions. [2022-11-25 17:30:51,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43671735241502685 [2022-11-25 17:30:51,461 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1953 transitions. [2022-11-25 17:30:51,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1953 transitions. [2022-11-25 17:30:51,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:51,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1953 transitions. [2022-11-25 17:30:51,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 75.11538461538461) internal successors, (1953), 26 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,472 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:30:51,472 INFO L175 Difference]: Start difference. First operand has 363 places, 1386 transitions, 34465 flow. Second operand 26 states and 1953 transitions. [2022-11-25 17:30:51,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1785 transitions, 46355 flow [2022-11-25 17:31:00,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1785 transitions, 45748 flow, removed 283 selfloop flow, removed 5 redundant places. [2022-11-25 17:31:00,115 INFO L231 Difference]: Finished difference. Result has 391 places, 1615 transitions, 43150 flow [2022-11-25 17:31:00,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=33936, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=43150, PETRI_PLACES=391, PETRI_TRANSITIONS=1615} [2022-11-25 17:31:00,117 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 362 predicate places. [2022-11-25 17:31:00,117 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1615 transitions, 43150 flow [2022-11-25 17:31:00,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:00,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:00,118 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:00,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-25 17:31:00,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:00,323 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:31:00,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:00,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1891680367, now seen corresponding path program 22 times [2022-11-25 17:31:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:00,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122606417] [2022-11-25 17:31:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:00,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122606417] [2022-11-25 17:31:00,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122606417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873070834] [2022-11-25 17:31:00,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:31:00,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:00,472 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:00,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:31:00,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:31:00,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:31:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:00,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:00,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873070834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:00,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:31:00,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-11-25 17:31:00,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702422388] [2022-11-25 17:31:00,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:00,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:31:00,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:31:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:31:00,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:31:00,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1615 transitions, 43150 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:00,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:00,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:31:00,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:07,903 INFO L130 PetriNetUnfolder]: 5210/10047 cut-off events. [2022-11-25 17:31:07,903 INFO L131 PetriNetUnfolder]: For 425593/425593 co-relation queries the response was YES. [2022-11-25 17:31:08,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108336 conditions, 10047 events. 5210/10047 cut-off events. For 425593/425593 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 85896 event pairs, 223 based on Foata normal form. 56/10103 useless extension candidates. Maximal degree in co-relation 108216. Up to 5264 conditions per place. [2022-11-25 17:31:08,171 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 902 selfloop transitions, 979 changer transitions 21/1902 dead transitions. [2022-11-25 17:31:08,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1902 transitions, 52836 flow [2022-11-25 17:31:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:31:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:31:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1876 transitions. [2022-11-25 17:31:08,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43627906976744185 [2022-11-25 17:31:08,175 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1876 transitions. [2022-11-25 17:31:08,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1876 transitions. [2022-11-25 17:31:08,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:08,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1876 transitions. [2022-11-25 17:31:08,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.04) internal successors, (1876), 25 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 172.0) internal successors, (4472), 26 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,184 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 172.0) internal successors, (4472), 26 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:08,184 INFO L175 Difference]: Start difference. First operand has 391 places, 1615 transitions, 43150 flow. Second operand 25 states and 1876 transitions. [2022-11-25 17:31:08,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1902 transitions, 52836 flow [2022-11-25 17:31:18,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1902 transitions, 51579 flow, removed 419 selfloop flow, removed 10 redundant places. [2022-11-25 17:31:18,632 INFO L231 Difference]: Finished difference. Result has 412 places, 1739 transitions, 48584 flow [2022-11-25 17:31:18,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=42117, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=48584, PETRI_PLACES=412, PETRI_TRANSITIONS=1739} [2022-11-25 17:31:18,633 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 383 predicate places. [2022-11-25 17:31:18,633 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1739 transitions, 48584 flow [2022-11-25 17:31:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:18,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:18,634 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:18,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-25 17:31:18,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:18,835 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:31:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1252596679, now seen corresponding path program 23 times [2022-11-25 17:31:18,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:18,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043752405] [2022-11-25 17:31:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:18,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:18,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:18,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043752405] [2022-11-25 17:31:18,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043752405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531987428] [2022-11-25 17:31:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:31:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:18,979 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:18,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:31:19,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 17:31:19,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:31:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:19,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:19,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531987428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:19,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:31:19,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-11-25 17:31:19,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091006124] [2022-11-25 17:31:19,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:19,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:31:19,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:31:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:31:19,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:31:19,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1739 transitions, 48584 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:19,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:19,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:31:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:29,881 INFO L130 PetriNetUnfolder]: 5366/10363 cut-off events. [2022-11-25 17:31:29,881 INFO L131 PetriNetUnfolder]: For 516853/516853 co-relation queries the response was YES. [2022-11-25 17:31:30,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114695 conditions, 10363 events. 5366/10363 cut-off events. For 516853/516853 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 89279 event pairs, 129 based on Foata normal form. 160/10523 useless extension candidates. Maximal degree in co-relation 114568. Up to 3030 conditions per place. [2022-11-25 17:31:30,094 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 592 selfloop transitions, 1352 changer transitions 17/1961 dead transitions. [2022-11-25 17:31:30,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1961 transitions, 56376 flow [2022-11-25 17:31:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:31:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:31:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2016 transitions. [2022-11-25 17:31:30,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2022-11-25 17:31:30,098 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2016 transitions. [2022-11-25 17:31:30,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2016 transitions. [2022-11-25 17:31:30,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:30,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2016 transitions. [2022-11-25 17:31:30,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 74.66666666666667) internal successors, (2016), 27 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:30,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 172.0) internal successors, (4816), 28 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:30,107 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 172.0) internal successors, (4816), 28 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:30,107 INFO L175 Difference]: Start difference. First operand has 412 places, 1739 transitions, 48584 flow. Second operand 27 states and 2016 transitions. [2022-11-25 17:31:30,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1961 transitions, 56376 flow [2022-11-25 17:31:40,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1961 transitions, 54889 flow, removed 256 selfloop flow, removed 10 redundant places. [2022-11-25 17:31:40,194 INFO L231 Difference]: Finished difference. Result has 432 places, 1816 transitions, 53724 flow [2022-11-25 17:31:40,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=47092, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=53724, PETRI_PLACES=432, PETRI_TRANSITIONS=1816} [2022-11-25 17:31:40,196 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2022-11-25 17:31:40,196 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1816 transitions, 53724 flow [2022-11-25 17:31:40,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:40,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:40,197 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:40,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:40,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 17:31:40,402 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:31:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash 948975775, now seen corresponding path program 24 times [2022-11-25 17:31:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:40,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003672065] [2022-11-25 17:31:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:40,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:40,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003672065] [2022-11-25 17:31:40,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003672065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:40,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197819018] [2022-11-25 17:31:40,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:31:40,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:40,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:40,537 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:40,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:31:40,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:31:40,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:40,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:31:40,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:40,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:40,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197819018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:40,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:31:40,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-11-25 17:31:40,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320327483] [2022-11-25 17:31:40,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:40,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:31:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:31:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:31:40,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:31:40,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1816 transitions, 53724 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:40,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:40,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:31:40,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:52,504 INFO L130 PetriNetUnfolder]: 7307/13981 cut-off events. [2022-11-25 17:31:52,504 INFO L131 PetriNetUnfolder]: For 744848/744848 co-relation queries the response was YES. [2022-11-25 17:31:52,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163392 conditions, 13981 events. 7307/13981 cut-off events. For 744848/744848 co-relation queries the response was YES. Maximal size of possible extension queue 1167. Compared 124484 event pairs, 189 based on Foata normal form. 242/14223 useless extension candidates. Maximal degree in co-relation 163264. Up to 4190 conditions per place. [2022-11-25 17:31:52,784 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 783 selfloop transitions, 1862 changer transitions 42/2687 dead transitions. [2022-11-25 17:31:52,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2687 transitions, 82518 flow [2022-11-25 17:31:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 17:31:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 17:31:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2324 transitions. [2022-11-25 17:31:52,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358589647411853 [2022-11-25 17:31:52,788 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2324 transitions. [2022-11-25 17:31:52,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2324 transitions. [2022-11-25 17:31:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:52,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2324 transitions. [2022-11-25 17:31:52,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 74.96774193548387) internal successors, (2324), 31 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:52,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:52,801 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:52,801 INFO L175 Difference]: Start difference. First operand has 432 places, 1816 transitions, 53724 flow. Second operand 31 states and 2324 transitions. [2022-11-25 17:31:52,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2687 transitions, 82518 flow [2022-11-25 17:32:09,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 2687 transitions, 81176 flow, removed 385 selfloop flow, removed 19 redundant places. [2022-11-25 17:32:09,236 INFO L231 Difference]: Finished difference. Result has 455 places, 2449 transitions, 79111 flow [2022-11-25 17:32:09,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=52855, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=79111, PETRI_PLACES=455, PETRI_TRANSITIONS=2449} [2022-11-25 17:32:09,237 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 426 predicate places. [2022-11-25 17:32:09,237 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 2449 transitions, 79111 flow [2022-11-25 17:32:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:09,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:09,237 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:09,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-25 17:32:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 17:32:09,438 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 17:32:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1493098387, now seen corresponding path program 25 times [2022-11-25 17:32:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:09,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221833750] [2022-11-25 17:32:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:09,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:09,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221833750] [2022-11-25 17:32:09,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221833750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304066281] [2022-11-25 17:32:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:32:09,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:09,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:09,676 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:09,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a568508a-dcf3-44a1-bede-f2d9d03c7b2d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:32:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:32:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:09,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304066281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:09,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:32:09,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2022-11-25 17:32:09,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795923792] [2022-11-25 17:32:09,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:09,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:32:09,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:09,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:32:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:32:10,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-11-25 17:32:10,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 2449 transitions, 79111 flow. Second operand has 21 states, 21 states have (on average 70.66666666666667) internal successors, (1484), 21 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:10,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:10,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-11-25 17:32:10,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand