./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/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_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/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_93e82150-539d-45e5-bd2a-755ab625173e/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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:07:39,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:07:39,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:07:39,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:07:39,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:07:39,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:07:39,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:07:39,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:07:39,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:07:39,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:07:39,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:07:39,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:07:39,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:07:39,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:07:39,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:07:39,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:07:39,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:07:39,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:07:39,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:07:39,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:07:39,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:07:39,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:07:39,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:07:39,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:07:39,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:07:39,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:07:39,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:07:39,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:07:39,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:07:39,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:07:39,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:07:39,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:07:39,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:07:39,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:07:39,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:07:39,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:07:39,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:07:39,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:07:39,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:07:39,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:07:39,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:07:39,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:07:39,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:07:39,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:07:39,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:07:39,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:07:39,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:07:39,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:07:39,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:07:39,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:07:39,792 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:07:39,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:07:39,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:07:39,793 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:07:39,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:07:39,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:07:39,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:07:39,794 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:07:39,794 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:07:39,794 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:07:39,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:07:39,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:07:39,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:07:39,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:07:39,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:07:39,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:07:39,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:07:39,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:07:39,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:07:39,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:07:39,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:07:39,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:07:39,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:07:39,797 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:07:39,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:07:39,798 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_93e82150-539d-45e5-bd2a-755ab625173e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-11-25 18:07:40,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:07:40,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:07:40,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:07:40,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:07:40,124 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:07:40,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-25 18:07:43,275 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:07:43,530 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:07:43,531 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-11-25 18:07:43,541 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/data/6827badad/ee884b490a9a469f93d1330849349a71/FLAG94a1fc3ab [2022-11-25 18:07:43,559 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/data/6827badad/ee884b490a9a469f93d1330849349a71 [2022-11-25 18:07:43,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:07:43,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:07:43,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:07:43,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:07:43,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:07:43,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411443fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43, skipping insertion in model container [2022-11-25 18:07:43,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:07:43,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:07:43,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,779 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,780 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,785 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,787 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,795 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,798 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,798 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,803 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,814 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_93e82150-539d-45e5-bd2a-755ab625173e/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-25 18:07:43,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:07:43,829 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:07:43,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,844 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,845 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,845 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,846 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,846 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,847 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,848 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,848 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,849 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,849 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,850 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:07:43,851 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:07:43,856 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_93e82150-539d-45e5-bd2a-755ab625173e/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-11-25 18:07:43,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:07:43,871 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:07:43,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43 WrapperNode [2022-11-25 18:07:43,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:07:43,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:07:43,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:07:43,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:07:43,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,908 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-11-25 18:07:43,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:07:43,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:07:43,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:07:43,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:07:43,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,932 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:07:43,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:07:43,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:07:43,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:07:43,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (1/1) ... [2022-11-25 18:07:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:07:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:43,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:07:43,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:07:44,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:07:44,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:07:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:07:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:07:44,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:07:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:07:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:07:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:07:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:07:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:07:44,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:07:44,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:07:44,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:07:44,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:07:44,028 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:07:44,187 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:07:44,190 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:07:44,506 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:07:44,555 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:07:44,556 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:07:44,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:44 BoogieIcfgContainer [2022-11-25 18:07:44,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:07:44,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:07:44,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:07:44,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:07:44,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:07:43" (1/3) ... [2022-11-25 18:07:44,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5195b63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:44, skipping insertion in model container [2022-11-25 18:07:44,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:43" (2/3) ... [2022-11-25 18:07:44,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5195b63c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:44, skipping insertion in model container [2022-11-25 18:07:44,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:44" (3/3) ... [2022-11-25 18:07:44,568 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-11-25 18:07:44,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:07:44,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 18:07:44,588 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:07:44,675 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:07:44,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 100 transitions, 216 flow [2022-11-25 18:07:44,780 INFO L130 PetriNetUnfolder]: 6/98 cut-off events. [2022-11-25 18:07:44,781 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:07:44,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 98 events. 6/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2022-11-25 18:07:44,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 100 transitions, 216 flow [2022-11-25 18:07:44,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 93 transitions, 198 flow [2022-11-25 18:07:44,796 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:07:44,815 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 93 transitions, 198 flow [2022-11-25 18:07:44,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 93 transitions, 198 flow [2022-11-25 18:07:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 198 flow [2022-11-25 18:07:44,850 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-11-25 18:07:44,850 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:07:44,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2022-11-25 18:07:44,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2022-11-25 18:07:48,805 INFO L134 LiptonReduction]: Checked pairs total: 1032 [2022-11-25 18:07:48,806 INFO L136 LiptonReduction]: Total number of compositions: 93 [2022-11-25 18:07:48,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:07:48,842 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;@190b17d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:07:48,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 18:07:48,845 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:07:48,846 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:07:48,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:48,847 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:07:48,847 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 18:07:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash 395, now seen corresponding path program 1 times [2022-11-25 18:07:48,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:48,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946326643] [2022-11-25 18:07:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:48,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:48,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946326643] [2022-11-25 18:07:48,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946326643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:48,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:48,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:07:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660351656] [2022-11-25 18:07:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:07:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:07:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:07:49,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 193 [2022-11-25 18:07:49,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:49,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 193 [2022-11-25 18:07:49,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:49,145 INFO L130 PetriNetUnfolder]: 96/176 cut-off events. [2022-11-25 18:07:49,146 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:07:49,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 176 events. 96/176 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 715 event pairs, 66 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 273. Up to 172 conditions per place. [2022-11-25 18:07:49,154 INFO L137 encePairwiseOnDemand]: 190/193 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2022-11-25 18:07:49,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 98 flow [2022-11-25 18:07:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:07:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:07:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-11-25 18:07:49,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5155440414507773 [2022-11-25 18:07:49,178 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-11-25 18:07:49,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-11-25 18:07:49,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:49,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-11-25 18:07:49,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,212 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,214 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 199 transitions. [2022-11-25 18:07:49,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 98 flow [2022-11-25 18:07:49,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:07:49,219 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2022-11-25 18:07:49,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2022-11-25 18:07:49,226 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2022-11-25 18:07:49,226 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2022-11-25 18:07:49,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:49,227 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:07:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:07:49,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:07:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash 389269, now seen corresponding path program 1 times [2022-11-25 18:07:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:49,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627055858] [2022-11-25 18:07:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627055858] [2022-11-25 18:07:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627055858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:49,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:49,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:07:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139845260] [2022-11-25 18:07:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:49,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:49,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:49,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:49,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:49,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2022-11-25 18:07:49,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:49,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2022-11-25 18:07:49,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:49,623 INFO L130 PetriNetUnfolder]: 89/162 cut-off events. [2022-11-25 18:07:49,624 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:07:49,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 162 events. 89/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 637 event pairs, 61 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 323. Up to 157 conditions per place. [2022-11-25 18:07:49,626 INFO L137 encePairwiseOnDemand]: 190/193 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2022-11-25 18:07:49,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 82 flow [2022-11-25 18:07:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-25 18:07:49,629 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44905008635578586 [2022-11-25 18:07:49,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-25 18:07:49,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-25 18:07:49,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:49,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-25 18:07:49,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,633 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 260 transitions. [2022-11-25 18:07:49,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 82 flow [2022-11-25 18:07:49,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:07:49,634 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2022-11-25 18:07:49,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-11-25 18:07:49,635 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2022-11-25 18:07:49,635 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2022-11-25 18:07:49,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:49,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:07:49,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:07:49,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:07:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 389268, now seen corresponding path program 1 times [2022-11-25 18:07:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:49,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366535391] [2022-11-25 18:07:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:49,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366535391] [2022-11-25 18:07:49,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366535391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:49,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:49,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:07:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360038156] [2022-11-25 18:07:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:49,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:49,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:49,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 193 [2022-11-25 18:07:49,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:49,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 193 [2022-11-25 18:07:49,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:49,825 INFO L130 PetriNetUnfolder]: 82/148 cut-off events. [2022-11-25 18:07:49,825 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:07:49,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 148 events. 82/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 563 event pairs, 56 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 296. Up to 143 conditions per place. [2022-11-25 18:07:49,827 INFO L137 encePairwiseOnDemand]: 190/193 looper letters, 15 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-25 18:07:49,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 76 flow [2022-11-25 18:07:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-11-25 18:07:49,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44041450777202074 [2022-11-25 18:07:49,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-11-25 18:07:49,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-11-25 18:07:49,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:49,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-11-25 18:07:49,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,833 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 3 states and 255 transitions. [2022-11-25 18:07:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 76 flow [2022-11-25 18:07:49,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:49,835 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 45 flow [2022-11-25 18:07:49,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=45, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2022-11-25 18:07:49,835 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2022-11-25 18:07:49,836 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 45 flow [2022-11-25 18:07:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:49,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:49,836 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:07:49,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:07:49,837 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 18:07:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:49,838 INFO L85 PathProgramCache]: Analyzing trace with hash 374094220, now seen corresponding path program 1 times [2022-11-25 18:07:49,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:49,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057728188] [2022-11-25 18:07:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:49,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:49,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:49,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057728188] [2022-11-25 18:07:49,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057728188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:49,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:49,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:49,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266795023] [2022-11-25 18:07:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:49,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:07:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:07:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:07:50,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2022-11-25 18:07:50,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 45 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:50,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2022-11-25 18:07:50,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:50,068 INFO L130 PetriNetUnfolder]: 62/116 cut-off events. [2022-11-25 18:07:50,069 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:07:50,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 116 events. 62/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 404 event pairs, 42 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 233. Up to 111 conditions per place. [2022-11-25 18:07:50,070 INFO L137 encePairwiseOnDemand]: 191/193 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2022-11-25 18:07:50,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 73 flow [2022-11-25 18:07:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2022-11-25 18:07:50,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4162348877374784 [2022-11-25 18:07:50,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2022-11-25 18:07:50,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2022-11-25 18:07:50,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:50,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2022-11-25 18:07:50,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,076 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 45 flow. Second operand 3 states and 241 transitions. [2022-11-25 18:07:50,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 73 flow [2022-11-25 18:07:50,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:50,077 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 44 flow [2022-11-25 18:07:50,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2022-11-25 18:07:50,078 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2022-11-25 18:07:50,078 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 44 flow [2022-11-25 18:07:50,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:50,079 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:07:50,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:07:50,080 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 18:07:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash 374094219, now seen corresponding path program 1 times [2022-11-25 18:07:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:50,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273139510] [2022-11-25 18:07:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:50,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273139510] [2022-11-25 18:07:50,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273139510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:50,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:50,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:07:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095647337] [2022-11-25 18:07:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:50,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:50,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2022-11-25 18:07:50,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 44 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 18:07:50,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:50,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2022-11-25 18:07:50,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:50,229 INFO L130 PetriNetUnfolder]: 42/84 cut-off events. [2022-11-25 18:07:50,229 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:07:50,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 84 events. 42/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 249 event pairs, 28 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 170. Up to 79 conditions per place. [2022-11-25 18:07:50,230 INFO L137 encePairwiseOnDemand]: 191/193 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 18:07:50,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 70 flow [2022-11-25 18:07:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-11-25 18:07:50,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44041450777202074 [2022-11-25 18:07:50,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-11-25 18:07:50,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-11-25 18:07:50,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:50,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-11-25 18:07:50,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,236 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 44 flow. Second operand 3 states and 255 transitions. [2022-11-25 18:07:50,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 70 flow [2022-11-25 18:07:50,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:50,237 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2022-11-25 18:07:50,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2022-11-25 18:07:50,238 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2022-11-25 18:07:50,239 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2022-11-25 18:07:50,239 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 18:07:50,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:50,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:07:50,240 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 18:07:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash -862450605, now seen corresponding path program 1 times [2022-11-25 18:07:50,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:50,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887788284] [2022-11-25 18:07:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887788284] [2022-11-25 18:07:50,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887788284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:50,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:50,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:07:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929035213] [2022-11-25 18:07:50,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:50,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:07:50,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:07:50,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:07:50,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 193 [2022-11-25 18:07:50,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:50,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 193 [2022-11-25 18:07:50,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:50,601 INFO L130 PetriNetUnfolder]: 109/185 cut-off events. [2022-11-25 18:07:50,601 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:07:50,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 185 events. 109/185 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 571 event pairs, 9 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 380. Up to 126 conditions per place. [2022-11-25 18:07:50,603 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 30 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2022-11-25 18:07:50,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 37 transitions, 158 flow [2022-11-25 18:07:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:07:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:07:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 443 transitions. [2022-11-25 18:07:50,605 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45906735751295336 [2022-11-25 18:07:50,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 443 transitions. [2022-11-25 18:07:50,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 443 transitions. [2022-11-25 18:07:50,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:50,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 443 transitions. [2022-11-25 18:07:50,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,610 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 5 states and 443 transitions. [2022-11-25 18:07:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 37 transitions, 158 flow [2022-11-25 18:07:50,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:50,612 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 87 flow [2022-11-25 18:07:50,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2022-11-25 18:07:50,613 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2022-11-25 18:07:50,613 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 87 flow [2022-11-25 18:07:50,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:50,614 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:50,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:07:50,614 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 18:07:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash 99221851, now seen corresponding path program 1 times [2022-11-25 18:07:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:50,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618645727] [2022-11-25 18:07:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:07:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:50,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618645727] [2022-11-25 18:07:50,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618645727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:50,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:50,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:07:50,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989038951] [2022-11-25 18:07:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:50,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:07:50,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:07:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:07:50,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 193 [2022-11-25 18:07:50,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:50,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:50,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 193 [2022-11-25 18:07:50,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:51,043 INFO L130 PetriNetUnfolder]: 106/191 cut-off events. [2022-11-25 18:07:51,043 INFO L131 PetriNetUnfolder]: For 127/139 co-relation queries the response was YES. [2022-11-25 18:07:51,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 191 events. 106/191 cut-off events. For 127/139 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 683 event pairs, 11 based on Foata normal form. 22/210 useless extension candidates. Maximal degree in co-relation 532. Up to 104 conditions per place. [2022-11-25 18:07:51,045 INFO L137 encePairwiseOnDemand]: 189/193 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2022-11-25 18:07:51,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 197 flow [2022-11-25 18:07:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:07:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:07:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2022-11-25 18:07:51,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46632124352331605 [2022-11-25 18:07:51,048 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2022-11-25 18:07:51,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2022-11-25 18:07:51,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:51,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2022-11-25 18:07:51,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,052 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,052 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 87 flow. Second operand 4 states and 360 transitions. [2022-11-25 18:07:51,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 197 flow [2022-11-25 18:07:51,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:51,054 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 98 flow [2022-11-25 18:07:51,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2022-11-25 18:07:51,055 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-11-25 18:07:51,056 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 98 flow [2022-11-25 18:07:51,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:51,056 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:51,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:07:51,057 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 18:07:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2076231089, now seen corresponding path program 1 times [2022-11-25 18:07:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:51,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361630631] [2022-11-25 18:07:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:51,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361630631] [2022-11-25 18:07:51,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361630631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:51,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:07:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116628370] [2022-11-25 18:07:51,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:51,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:07:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:07:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:07:51,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2022-11-25 18:07:51,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:51,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2022-11-25 18:07:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:51,516 INFO L130 PetriNetUnfolder]: 172/305 cut-off events. [2022-11-25 18:07:51,516 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2022-11-25 18:07:51,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 305 events. 172/305 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1086 event pairs, 30 based on Foata normal form. 4/309 useless extension candidates. Maximal degree in co-relation 925. Up to 120 conditions per place. [2022-11-25 18:07:51,520 INFO L137 encePairwiseOnDemand]: 188/193 looper letters, 42 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2022-11-25 18:07:51,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 309 flow [2022-11-25 18:07:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:07:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:07:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2022-11-25 18:07:51,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46010362694300516 [2022-11-25 18:07:51,522 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2022-11-25 18:07:51,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2022-11-25 18:07:51,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:51,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2022-11-25 18:07:51,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,526 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 98 flow. Second operand 5 states and 444 transitions. [2022-11-25 18:07:51,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 309 flow [2022-11-25 18:07:51,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:51,532 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 177 flow [2022-11-25 18:07:51,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2022-11-25 18:07:51,535 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2022-11-25 18:07:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 177 flow [2022-11-25 18:07:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:51,536 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:51,536 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:07:51,537 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 18:07:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash 281243693, now seen corresponding path program 2 times [2022-11-25 18:07:51,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:51,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275938040] [2022-11-25 18:07:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:51,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:52,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:52,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275938040] [2022-11-25 18:07:52,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275938040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:07:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162286998] [2022-11-25 18:07:52,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:07:52,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:52,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:07:52,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:07:52,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:07:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:07:52,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:07:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:53,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:53,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162286998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:53,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:07:53,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2022-11-25 18:07:53,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517150765] [2022-11-25 18:07:53,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:53,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:07:53,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:07:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:07:54,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 193 [2022-11-25 18:07:54,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 177 flow. Second operand has 17 states, 17 states have (on average 74.41176470588235) internal successors, (1265), 17 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:54,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:54,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 193 [2022-11-25 18:07:54,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:59,984 INFO L130 PetriNetUnfolder]: 610/1088 cut-off events. [2022-11-25 18:07:59,985 INFO L131 PetriNetUnfolder]: For 1681/1681 co-relation queries the response was YES. [2022-11-25 18:07:59,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 1088 events. 610/1088 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5528 event pairs, 8 based on Foata normal form. 11/1099 useless extension candidates. Maximal degree in co-relation 3916. Up to 365 conditions per place. [2022-11-25 18:07:59,993 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 120 selfloop transitions, 125 changer transitions 67/312 dead transitions. [2022-11-25 18:07:59,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 312 transitions, 2197 flow [2022-11-25 18:07:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 18:07:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 18:08:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4092 transitions. [2022-11-25 18:08:00,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4000391045067944 [2022-11-25 18:08:00,005 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4092 transitions. [2022-11-25 18:08:00,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4092 transitions. [2022-11-25 18:08:00,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:00,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4092 transitions. [2022-11-25 18:08:00,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 77.20754716981132) internal successors, (4092), 53 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 193.0) internal successors, (10422), 54 states have internal predecessors, (10422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,034 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 193.0) internal successors, (10422), 54 states have internal predecessors, (10422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,034 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 177 flow. Second operand 53 states and 4092 transitions. [2022-11-25 18:08:00,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 312 transitions, 2197 flow [2022-11-25 18:08:00,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 312 transitions, 2189 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-25 18:08:00,046 INFO L231 Difference]: Finished difference. Result has 118 places, 156 transitions, 1426 flow [2022-11-25 18:08:00,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=1426, PETRI_PLACES=118, PETRI_TRANSITIONS=156} [2022-11-25 18:08:00,047 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 87 predicate places. [2022-11-25 18:08:00,048 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 156 transitions, 1426 flow [2022-11-25 18:08:00,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 74.41176470588235) internal successors, (1265), 17 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:00,049 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:00,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:00,254 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 18:08:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash -522045185, now seen corresponding path program 3 times [2022-11-25 18:08:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:00,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463074779] [2022-11-25 18:08:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:00,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:00,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463074779] [2022-11-25 18:08:00,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463074779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:00,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:08:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294557572] [2022-11-25 18:08:00,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:08:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:08:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:08:00,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2022-11-25 18:08:00,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 156 transitions, 1426 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:00,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2022-11-25 18:08:00,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:00,951 INFO L130 PetriNetUnfolder]: 597/1050 cut-off events. [2022-11-25 18:08:00,951 INFO L131 PetriNetUnfolder]: For 8065/8065 co-relation queries the response was YES. [2022-11-25 18:08:00,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5721 conditions, 1050 events. 597/1050 cut-off events. For 8065/8065 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5144 event pairs, 74 based on Foata normal form. 12/1062 useless extension candidates. Maximal degree in co-relation 5682. Up to 450 conditions per place. [2022-11-25 18:08:00,963 INFO L137 encePairwiseOnDemand]: 188/193 looper letters, 149 selfloop transitions, 97 changer transitions 0/246 dead transitions. [2022-11-25 18:08:00,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 246 transitions, 2676 flow [2022-11-25 18:08:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:08:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:08:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-11-25 18:08:00,967 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4552183567727609 [2022-11-25 18:08:00,967 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-11-25 18:08:00,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-11-25 18:08:00,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:00,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-11-25 18:08:00,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,973 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:00,973 INFO L175 Difference]: Start difference. First operand has 118 places, 156 transitions, 1426 flow. Second operand 7 states and 615 transitions. [2022-11-25 18:08:00,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 246 transitions, 2676 flow [2022-11-25 18:08:01,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 246 transitions, 2367 flow, removed 148 selfloop flow, removed 8 redundant places. [2022-11-25 18:08:01,076 INFO L231 Difference]: Finished difference. Result has 110 places, 195 transitions, 1918 flow [2022-11-25 18:08:01,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1918, PETRI_PLACES=110, PETRI_TRANSITIONS=195} [2022-11-25 18:08:01,078 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 79 predicate places. [2022-11-25 18:08:01,078 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 195 transitions, 1918 flow [2022-11-25 18:08:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:01,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:01,079 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:08:01,080 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 18:08:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 461421431, now seen corresponding path program 4 times [2022-11-25 18:08:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711268031] [2022-11-25 18:08:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:01,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:01,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711268031] [2022-11-25 18:08:01,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711268031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:01,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:01,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:08:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931764159] [2022-11-25 18:08:01,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:01,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:08:01,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:08:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:08:01,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2022-11-25 18:08:01,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 195 transitions, 1918 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:01,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:01,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2022-11-25 18:08:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:01,749 INFO L130 PetriNetUnfolder]: 594/1029 cut-off events. [2022-11-25 18:08:01,749 INFO L131 PetriNetUnfolder]: For 9336/9336 co-relation queries the response was YES. [2022-11-25 18:08:01,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5727 conditions, 1029 events. 594/1029 cut-off events. For 9336/9336 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4952 event pairs, 82 based on Foata normal form. 6/1035 useless extension candidates. Maximal degree in co-relation 5691. Up to 450 conditions per place. [2022-11-25 18:08:01,762 INFO L137 encePairwiseOnDemand]: 188/193 looper letters, 137 selfloop transitions, 95 changer transitions 0/232 dead transitions. [2022-11-25 18:08:01,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 232 transitions, 2563 flow [2022-11-25 18:08:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:08:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:08:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 444 transitions. [2022-11-25 18:08:01,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46010362694300516 [2022-11-25 18:08:01,765 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 444 transitions. [2022-11-25 18:08:01,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 444 transitions. [2022-11-25 18:08:01,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:01,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 444 transitions. [2022-11-25 18:08:01,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.8) internal successors, (444), 5 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:01,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:01,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:01,770 INFO L175 Difference]: Start difference. First operand has 110 places, 195 transitions, 1918 flow. Second operand 5 states and 444 transitions. [2022-11-25 18:08:01,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 232 transitions, 2563 flow [2022-11-25 18:08:01,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 232 transitions, 2358 flow, removed 28 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:01,848 INFO L231 Difference]: Finished difference. Result has 108 places, 193 transitions, 1882 flow [2022-11-25 18:08:01,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1882, PETRI_PLACES=108, PETRI_TRANSITIONS=193} [2022-11-25 18:08:01,849 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2022-11-25 18:08:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 193 transitions, 1882 flow [2022-11-25 18:08:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:01,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:01,850 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 18:08:01,851 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 18:08:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -872491173, now seen corresponding path program 5 times [2022-11-25 18:08:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570064298] [2022-11-25 18:08:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:01,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:08:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570064298] [2022-11-25 18:08:02,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570064298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:02,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:02,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:08:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213138528] [2022-11-25 18:08:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:02,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:08:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:08:02,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:08:02,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 193 [2022-11-25 18:08:02,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 193 transitions, 1882 flow. Second operand has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:02,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:02,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 193 [2022-11-25 18:08:02,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:02,427 INFO L130 PetriNetUnfolder]: 624/1065 cut-off events. [2022-11-25 18:08:02,427 INFO L131 PetriNetUnfolder]: For 8279/8280 co-relation queries the response was YES. [2022-11-25 18:08:02,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5666 conditions, 1065 events. 624/1065 cut-off events. For 8279/8280 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5002 event pairs, 27 based on Foata normal form. 37/1098 useless extension candidates. Maximal degree in co-relation 5632. Up to 669 conditions per place. [2022-11-25 18:08:02,439 INFO L137 encePairwiseOnDemand]: 188/193 looper letters, 194 selfloop transitions, 42 changer transitions 0/242 dead transitions. [2022-11-25 18:08:02,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 242 transitions, 2765 flow [2022-11-25 18:08:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:08:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:08:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 440 transitions. [2022-11-25 18:08:02,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45595854922279794 [2022-11-25 18:08:02,442 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 440 transitions. [2022-11-25 18:08:02,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 440 transitions. [2022-11-25 18:08:02,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:02,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 440 transitions. [2022-11-25 18:08:02,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:02,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:02,446 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:02,447 INFO L175 Difference]: Start difference. First operand has 108 places, 193 transitions, 1882 flow. Second operand 5 states and 440 transitions. [2022-11-25 18:08:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 242 transitions, 2765 flow [2022-11-25 18:08:02,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 242 transitions, 2491 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-11-25 18:08:02,525 INFO L231 Difference]: Finished difference. Result has 107 places, 197 transitions, 1860 flow [2022-11-25 18:08:02,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1860, PETRI_PLACES=107, PETRI_TRANSITIONS=197} [2022-11-25 18:08:02,526 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2022-11-25 18:08:02,526 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 197 transitions, 1860 flow [2022-11-25 18:08:02,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:02,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:02,527 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:08:02,528 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 18:08:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 478634699, now seen corresponding path program 1 times [2022-11-25 18:08:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185869406] [2022-11-25 18:08:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:02,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:03,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:03,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185869406] [2022-11-25 18:08:03,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185869406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:03,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695295719] [2022-11-25 18:08:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:03,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:03,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:03,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:03,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:08:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 18:08:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:04,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695295719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:06,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:08:06,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-11-25 18:08:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508963290] [2022-11-25 18:08:06,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 18:08:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 18:08:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:08:07,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2022-11-25 18:08:07,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 197 transitions, 1860 flow. Second operand has 25 states, 25 states have (on average 73.12) internal successors, (1828), 25 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:07,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:07,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2022-11-25 18:08:07,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:11,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:08:35,608 INFO L130 PetriNetUnfolder]: 1375/2403 cut-off events. [2022-11-25 18:08:35,608 INFO L131 PetriNetUnfolder]: For 17601/17601 co-relation queries the response was YES. [2022-11-25 18:08:35,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12743 conditions, 2403 events. 1375/2403 cut-off events. For 17601/17601 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13739 event pairs, 2 based on Foata normal form. 13/2416 useless extension candidates. Maximal degree in co-relation 12709. Up to 504 conditions per place. [2022-11-25 18:08:35,633 INFO L137 encePairwiseOnDemand]: 183/193 looper letters, 240 selfloop transitions, 325 changer transitions 98/663 dead transitions. [2022-11-25 18:08:35,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 663 transitions, 7179 flow [2022-11-25 18:08:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 18:08:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-25 18:08:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5456 transitions. [2022-11-25 18:08:35,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3926309729418538 [2022-11-25 18:08:35,647 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5456 transitions. [2022-11-25 18:08:35,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5456 transitions. [2022-11-25 18:08:35,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:35,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5456 transitions. [2022-11-25 18:08:35,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 75.77777777777777) internal successors, (5456), 72 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 193.0) internal successors, (14089), 73 states have internal predecessors, (14089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,690 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 193.0) internal successors, (14089), 73 states have internal predecessors, (14089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,691 INFO L175 Difference]: Start difference. First operand has 107 places, 197 transitions, 1860 flow. Second operand 72 states and 5456 transitions. [2022-11-25 18:08:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 663 transitions, 7179 flow [2022-11-25 18:08:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 663 transitions, 7020 flow, removed 43 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:35,788 INFO L231 Difference]: Finished difference. Result has 205 places, 414 transitions, 4924 flow [2022-11-25 18:08:35,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=4924, PETRI_PLACES=205, PETRI_TRANSITIONS=414} [2022-11-25 18:08:35,789 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 174 predicate places. [2022-11-25 18:08:35,789 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 414 transitions, 4924 flow [2022-11-25 18:08:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 73.12) internal successors, (1828), 25 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:35,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:35,791 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:35,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:35,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:08:35,996 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 18:08:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1191470781, now seen corresponding path program 2 times [2022-11-25 18:08:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:35,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449737447] [2022-11-25 18:08:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:36,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:36,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:36,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449737447] [2022-11-25 18:08:36,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449737447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:36,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521530496] [2022-11-25 18:08:36,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:08:36,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:36,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:36,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:36,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:08:36,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:08:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:08:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:36,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:36,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521530496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:36,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:08:36,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-25 18:08:36,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33603277] [2022-11-25 18:08:36,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:36,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:08:36,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:36,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:08:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:08:36,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2022-11-25 18:08:36,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 414 transitions, 4924 flow. Second operand has 7 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:36,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:36,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2022-11-25 18:08:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:37,672 INFO L130 PetriNetUnfolder]: 1830/3143 cut-off events. [2022-11-25 18:08:37,673 INFO L131 PetriNetUnfolder]: For 41733/41740 co-relation queries the response was YES. [2022-11-25 18:08:37,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20434 conditions, 3143 events. 1830/3143 cut-off events. For 41733/41740 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18881 event pairs, 171 based on Foata normal form. 31/3174 useless extension candidates. Maximal degree in co-relation 20372. Up to 725 conditions per place. [2022-11-25 18:08:37,729 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 292 selfloop transitions, 372 changer transitions 0/672 dead transitions. [2022-11-25 18:08:37,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 672 transitions, 9363 flow [2022-11-25 18:08:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:08:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:08:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 898 transitions. [2022-11-25 18:08:37,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46528497409326425 [2022-11-25 18:08:37,732 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 898 transitions. [2022-11-25 18:08:37,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 898 transitions. [2022-11-25 18:08:37,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:37,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 898 transitions. [2022-11-25 18:08:37,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.8) internal successors, (898), 10 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:37,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:37,755 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 193.0) internal successors, (2123), 11 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:37,755 INFO L175 Difference]: Start difference. First operand has 205 places, 414 transitions, 4924 flow. Second operand 10 states and 898 transitions. [2022-11-25 18:08:37,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 672 transitions, 9363 flow [2022-11-25 18:08:38,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 672 transitions, 8458 flow, removed 285 selfloop flow, removed 14 redundant places. [2022-11-25 18:08:38,020 INFO L231 Difference]: Finished difference. Result has 193 places, 566 transitions, 7244 flow [2022-11-25 18:08:38,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7244, PETRI_PLACES=193, PETRI_TRANSITIONS=566} [2022-11-25 18:08:38,021 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 162 predicate places. [2022-11-25 18:08:38,021 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 566 transitions, 7244 flow [2022-11-25 18:08:38,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:38,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:38,022 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:38,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 18:08:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:38,223 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 18:08:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -42631791, now seen corresponding path program 3 times [2022-11-25 18:08:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:08:38,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784069523] [2022-11-25 18:08:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:08:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:08:39,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784069523] [2022-11-25 18:08:39,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784069523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:08:39,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354921784] [2022-11-25 18:08:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:08:39,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:08:39,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:08:39,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:08:39,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:08:39,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:08:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 18:08:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:41,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:43,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354921784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:43,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:08:43,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2022-11-25 18:08:43,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11482144] [2022-11-25 18:08:43,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:43,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 18:08:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:08:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 18:08:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:08:45,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2022-11-25 18:08:45,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 566 transitions, 7244 flow. Second operand has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:45,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:45,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2022-11-25 18:08:45,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:26,373 INFO L130 PetriNetUnfolder]: 2544/4443 cut-off events. [2022-11-25 18:09:26,374 INFO L131 PetriNetUnfolder]: For 55431/55438 co-relation queries the response was YES. [2022-11-25 18:09:26,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29836 conditions, 4443 events. 2544/4443 cut-off events. For 55431/55438 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28493 event pairs, 10 based on Foata normal form. 21/4464 useless extension candidates. Maximal degree in co-relation 29777. Up to 1317 conditions per place. [2022-11-25 18:09:26,427 INFO L137 encePairwiseOnDemand]: 185/193 looper letters, 328 selfloop transitions, 542 changer transitions 112/990 dead transitions. [2022-11-25 18:09:26,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 990 transitions, 13760 flow [2022-11-25 18:09:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 18:09:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-25 18:09:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5121 transitions. [2022-11-25 18:09:26,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41458873056994816 [2022-11-25 18:09:26,446 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5121 transitions. [2022-11-25 18:09:26,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5121 transitions. [2022-11-25 18:09:26,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:26,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5121 transitions. [2022-11-25 18:09:26,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 80.015625) internal successors, (5121), 64 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 193.0) internal successors, (12545), 65 states have internal predecessors, (12545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,481 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 193.0) internal successors, (12545), 65 states have internal predecessors, (12545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,481 INFO L175 Difference]: Start difference. First operand has 193 places, 566 transitions, 7244 flow. Second operand 64 states and 5121 transitions. [2022-11-25 18:09:26,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 990 transitions, 13760 flow [2022-11-25 18:09:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 990 transitions, 13464 flow, removed 148 selfloop flow, removed 0 redundant places. [2022-11-25 18:09:26,937 INFO L231 Difference]: Finished difference. Result has 277 places, 724 transitions, 10391 flow [2022-11-25 18:09:26,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=10391, PETRI_PLACES=277, PETRI_TRANSITIONS=724} [2022-11-25 18:09:26,938 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 246 predicate places. [2022-11-25 18:09:26,938 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 724 transitions, 10391 flow [2022-11-25 18:09:26,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:26,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:26,939 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:26,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:27,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:27,143 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 18:09:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash 652913305, now seen corresponding path program 4 times [2022-11-25 18:09:27,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:09:27,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106579692] [2022-11-25 18:09:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:09:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:09:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:28,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:09:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106579692] [2022-11-25 18:09:28,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106579692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:09:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815296633] [2022-11-25 18:09:28,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:09:28,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:09:28,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:28,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:09:28,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:09:28,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:09:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:09:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:09:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:09:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:29,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:09:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:09:31,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815296633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:09:31,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:09:31,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2022-11-25 18:09:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213839565] [2022-11-25 18:09:31,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:09:31,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:09:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:09:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:09:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:09:33,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2022-11-25 18:09:33,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 724 transitions, 10391 flow. Second operand has 27 states, 27 states have (on average 72.96296296296296) internal successors, (1970), 27 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:33,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:09:33,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2022-11-25 18:09:33,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:53,445 WARN L233 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 111 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:01,353 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 116 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:44,451 INFO L130 PetriNetUnfolder]: 3532/6178 cut-off events. [2022-11-25 18:10:44,451 INFO L131 PetriNetUnfolder]: For 85240/85240 co-relation queries the response was YES. [2022-11-25 18:10:44,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44506 conditions, 6178 events. 3532/6178 cut-off events. For 85240/85240 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 42846 event pairs, 30 based on Foata normal form. 13/6191 useless extension candidates. Maximal degree in co-relation 44425. Up to 1470 conditions per place. [2022-11-25 18:10:44,517 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 331 selfloop transitions, 1054 changer transitions 130/1515 dead transitions. [2022-11-25 18:10:44,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1515 transitions, 23336 flow [2022-11-25 18:10:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-25 18:10:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-25 18:10:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 6874 transitions. [2022-11-25 18:10:44,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39139099242726183 [2022-11-25 18:10:44,538 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 6874 transitions. [2022-11-25 18:10:44,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 6874 transitions. [2022-11-25 18:10:44,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:44,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 6874 transitions. [2022-11-25 18:10:44,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 75.53846153846153) internal successors, (6874), 91 states have internal predecessors, (6874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:44,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 193.0) internal successors, (17756), 92 states have internal predecessors, (17756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:44,591 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 193.0) internal successors, (17756), 92 states have internal predecessors, (17756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:44,591 INFO L175 Difference]: Start difference. First operand has 277 places, 724 transitions, 10391 flow. Second operand 91 states and 6874 transitions. [2022-11-25 18:10:44,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1515 transitions, 23336 flow [2022-11-25 18:10:45,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1515 transitions, 22651 flow, removed 266 selfloop flow, removed 25 redundant places. [2022-11-25 18:10:45,703 INFO L231 Difference]: Finished difference. Result has 358 places, 1251 transitions, 21248 flow [2022-11-25 18:10:45,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=10078, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=21248, PETRI_PLACES=358, PETRI_TRANSITIONS=1251} [2022-11-25 18:10:45,704 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 327 predicate places. [2022-11-25 18:10:45,705 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1251 transitions, 21248 flow [2022-11-25 18:10:45,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 72.96296296296296) internal successors, (1970), 27 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:45,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:45,706 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:45,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 18:10:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:10:45,912 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 18:10:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash -548888733, now seen corresponding path program 5 times [2022-11-25 18:10:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312513443] [2022-11-25 18:10:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:10:47,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:47,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312513443] [2022-11-25 18:10:47,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312513443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:47,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121494125] [2022-11-25 18:10:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:10:47,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:47,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:47,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:10:48,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:10:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:10:48,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 18:10:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:10:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:10:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:10:52,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121494125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:10:52,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:10:52,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2022-11-25 18:10:52,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832803656] [2022-11-25 18:10:52,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:10:52,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:10:52,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:10:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:10:53,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2022-11-25 18:10:53,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1251 transitions, 21248 flow. Second operand has 26 states, 26 states have (on average 73.03846153846153) internal successors, (1899), 26 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:10:53,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:53,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2022-11-25 18:10:53,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:11:03,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:12:14,595 INFO L130 PetriNetUnfolder]: 5149/9100 cut-off events. [2022-11-25 18:12:14,595 INFO L131 PetriNetUnfolder]: For 149012/149012 co-relation queries the response was YES. [2022-11-25 18:12:14,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74190 conditions, 9100 events. 5149/9100 cut-off events. For 149012/149012 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 66823 event pairs, 77 based on Foata normal form. 30/9130 useless extension candidates. Maximal degree in co-relation 74095. Up to 1865 conditions per place. [2022-11-25 18:12:14,709 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 494 selfloop transitions, 1618 changer transitions 195/2307 dead transitions. [2022-11-25 18:12:14,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 2307 transitions, 42194 flow [2022-11-25 18:12:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-25 18:12:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-25 18:12:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7041 transitions. [2022-11-25 18:12:14,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39227812134380746 [2022-11-25 18:12:14,720 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7041 transitions. [2022-11-25 18:12:14,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7041 transitions. [2022-11-25 18:12:14,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:14,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7041 transitions. [2022-11-25 18:12:14,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 75.70967741935483) internal successors, (7041), 93 states have internal predecessors, (7041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:14,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 193.0) internal successors, (18142), 94 states have internal predecessors, (18142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:14,752 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 193.0) internal successors, (18142), 94 states have internal predecessors, (18142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:14,752 INFO L175 Difference]: Start difference. First operand has 358 places, 1251 transitions, 21248 flow. Second operand 93 states and 7041 transitions. [2022-11-25 18:12:14,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 2307 transitions, 42194 flow [2022-11-25 18:12:19,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 2307 transitions, 38867 flow, removed 1595 selfloop flow, removed 23 redundant places. [2022-11-25 18:12:19,465 INFO L231 Difference]: Finished difference. Result has 468 places, 1931 transitions, 37225 flow [2022-11-25 18:12:19,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=20098, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=37225, PETRI_PLACES=468, PETRI_TRANSITIONS=1931} [2022-11-25 18:12:19,467 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 437 predicate places. [2022-11-25 18:12:19,467 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1931 transitions, 37225 flow [2022-11-25 18:12:19,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 73.03846153846153) internal successors, (1899), 26 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:19,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:12:19,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:12:19,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:12:19,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:12:19,700 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 18:12:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:12:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1884658031, now seen corresponding path program 6 times [2022-11-25 18:12:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:12:19,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696516998] [2022-11-25 18:12:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:12:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:12:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:12:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:20,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:12:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696516998] [2022-11-25 18:12:20,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696516998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:12:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588224426] [2022-11-25 18:12:20,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:12:20,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:12:20,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:12:20,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:12:20,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:12:21,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:12:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:12:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:12:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:12:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:22,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:12:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:12:23,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588224426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:12:23,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:12:23,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-25 18:12:23,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631915080] [2022-11-25 18:12:23,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:12:23,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:12:23,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:12:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:12:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:12:25,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2022-11-25 18:12:25,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1931 transitions, 37225 flow. Second operand has 22 states, 22 states have (on average 77.27272727272727) internal successors, (1700), 22 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:25,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:12:25,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2022-11-25 18:12:25,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:12:55,682 INFO L130 PetriNetUnfolder]: 5366/9398 cut-off events. [2022-11-25 18:12:55,683 INFO L131 PetriNetUnfolder]: For 135866/135875 co-relation queries the response was YES. [2022-11-25 18:12:55,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81266 conditions, 9398 events. 5366/9398 cut-off events. For 135866/135875 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 69245 event pairs, 190 based on Foata normal form. 16/9412 useless extension candidates. Maximal degree in co-relation 81124. Up to 4053 conditions per place. [2022-11-25 18:12:55,814 INFO L137 encePairwiseOnDemand]: 185/193 looper letters, 818 selfloop transitions, 1451 changer transitions 93/2372 dead transitions. [2022-11-25 18:12:55,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2372 transitions, 49316 flow [2022-11-25 18:12:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 18:12:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-25 18:12:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3674 transitions. [2022-11-25 18:12:55,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41383194413156116 [2022-11-25 18:12:55,824 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3674 transitions. [2022-11-25 18:12:55,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3674 transitions. [2022-11-25 18:12:55,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:12:55,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3674 transitions. [2022-11-25 18:12:55,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 79.8695652173913) internal successors, (3674), 46 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:55,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 193.0) internal successors, (9071), 47 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:55,840 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 193.0) internal successors, (9071), 47 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:12:55,840 INFO L175 Difference]: Start difference. First operand has 468 places, 1931 transitions, 37225 flow. Second operand 46 states and 3674 transitions. [2022-11-25 18:12:55,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2372 transitions, 49316 flow [2022-11-25 18:13:00,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 2372 transitions, 48289 flow, removed 467 selfloop flow, removed 31 redundant places. [2022-11-25 18:13:00,807 INFO L231 Difference]: Finished difference. Result has 494 places, 2140 transitions, 45260 flow [2022-11-25 18:13:00,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=36362, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=45260, PETRI_PLACES=494, PETRI_TRANSITIONS=2140} [2022-11-25 18:13:00,808 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 463 predicate places. [2022-11-25 18:13:00,809 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 2140 transitions, 45260 flow [2022-11-25 18:13:00,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.27272727272727) internal successors, (1700), 22 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:00,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:13:00,809 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:13:00,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:13:01,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:13:01,010 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 18:13:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:13:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1432890361, now seen corresponding path program 7 times [2022-11-25 18:13:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:13:01,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857895711] [2022-11-25 18:13:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:13:01,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:13:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:13:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:13:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:13:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857895711] [2022-11-25 18:13:02,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857895711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:13:02,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470395685] [2022-11-25 18:13:02,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:13:02,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:13:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:13:02,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:13:02,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:13:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:13:02,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:13:02,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:13:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:13:03,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:13:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:13:05,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470395685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:13:05,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:13:05,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-11-25 18:13:05,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689686637] [2022-11-25 18:13:05,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:13:05,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 18:13:05,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:13:05,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 18:13:05,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-11-25 18:13:07,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2022-11-25 18:13:07,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 2140 transitions, 45260 flow. Second operand has 30 states, 30 states have (on average 76.86666666666666) internal successors, (2306), 30 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:07,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:13:07,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2022-11-25 18:13:07,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:13:43,848 INFO L130 PetriNetUnfolder]: 6084/10674 cut-off events. [2022-11-25 18:13:43,848 INFO L131 PetriNetUnfolder]: For 198325/198333 co-relation queries the response was YES. [2022-11-25 18:13:43,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98162 conditions, 10674 events. 6084/10674 cut-off events. For 198325/198333 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 80619 event pairs, 26 based on Foata normal form. 22/10694 useless extension candidates. Maximal degree in co-relation 98007. Up to 4074 conditions per place. [2022-11-25 18:13:44,013 INFO L137 encePairwiseOnDemand]: 185/193 looper letters, 876 selfloop transitions, 1699 changer transitions 125/2710 dead transitions. [2022-11-25 18:13:44,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 2710 transitions, 60538 flow [2022-11-25 18:13:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-25 18:13:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-25 18:13:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 5504 transitions. [2022-11-25 18:13:44,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41330630021776676 [2022-11-25 18:13:44,021 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 5504 transitions. [2022-11-25 18:13:44,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 5504 transitions. [2022-11-25 18:13:44,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:13:44,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 5504 transitions. [2022-11-25 18:13:44,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 79.76811594202898) internal successors, (5504), 69 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 18:13:44,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 193.0) internal successors, (13510), 70 states have internal predecessors, (13510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:44,043 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 193.0) internal successors, (13510), 70 states have internal predecessors, (13510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:44,043 INFO L175 Difference]: Start difference. First operand has 494 places, 2140 transitions, 45260 flow. Second operand 69 states and 5504 transitions. [2022-11-25 18:13:44,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 2710 transitions, 60538 flow [2022-11-25 18:13:50,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 2710 transitions, 60283 flow, removed 110 selfloop flow, removed 15 redundant places. [2022-11-25 18:13:51,009 INFO L231 Difference]: Finished difference. Result has 565 places, 2407 transitions, 54985 flow [2022-11-25 18:13:51,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=45053, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=54985, PETRI_PLACES=565, PETRI_TRANSITIONS=2407} [2022-11-25 18:13:51,011 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 534 predicate places. [2022-11-25 18:13:51,012 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 2407 transitions, 54985 flow [2022-11-25 18:13:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 76.86666666666666) internal successors, (2306), 30 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:13:51,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:13:51,012 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:13:51,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:13:51,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:13:51,218 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 18:13:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:13:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash 402662799, now seen corresponding path program 8 times [2022-11-25 18:13:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:13:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710769970] [2022-11-25 18:13:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:13:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:13:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:13:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:13:54,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:13:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710769970] [2022-11-25 18:13:54,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710769970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:13:54,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398006313] [2022-11-25 18:13:54,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:13:54,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:13:54,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:13:54,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:13:54,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:13:54,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:13:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:13:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 18:13:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:13:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:13:56,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:14:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:14:02,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398006313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:14:02,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:14:02,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2022-11-25 18:14:02,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99337741] [2022-11-25 18:14:02,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:14:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 18:14:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:14:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 18:14:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=849, Unknown=2, NotChecked=0, Total=1056 [2022-11-25 18:14:06,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:14:07,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 193 [2022-11-25 18:14:07,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 2407 transitions, 54985 flow. Second operand has 33 states, 33 states have (on average 70.78787878787878) internal successors, (2336), 33 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:07,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:14:07,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 193 [2022-11-25 18:14:07,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:14:57,735 INFO L130 PetriNetUnfolder]: 7742/13593 cut-off events. [2022-11-25 18:14:57,735 INFO L131 PetriNetUnfolder]: For 301015/301015 co-relation queries the response was YES. [2022-11-25 18:14:57,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131444 conditions, 13593 events. 7742/13593 cut-off events. For 301015/301015 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 106541 event pairs, 14 based on Foata normal form. 18/13611 useless extension candidates. Maximal degree in co-relation 131270. Up to 3044 conditions per place. [2022-11-25 18:14:58,070 INFO L137 encePairwiseOnDemand]: 183/193 looper letters, 382 selfloop transitions, 3106 changer transitions 147/3635 dead transitions. [2022-11-25 18:14:58,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 3635 transitions, 86500 flow [2022-11-25 18:14:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-25 18:14:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2022-11-25 18:14:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 7599 transitions. [2022-11-25 18:14:58,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.382262689270084 [2022-11-25 18:14:58,081 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 7599 transitions. [2022-11-25 18:14:58,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 7599 transitions. [2022-11-25 18:14:58,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:14:58,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 7599 transitions. [2022-11-25 18:14:58,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 73.77669902912622) internal successors, (7599), 103 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:58,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 193.0) internal successors, (20072), 104 states have internal predecessors, (20072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:58,114 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 193.0) internal successors, (20072), 104 states have internal predecessors, (20072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:14:58,115 INFO L175 Difference]: Start difference. First operand has 565 places, 2407 transitions, 54985 flow. Second operand 103 states and 7599 transitions. [2022-11-25 18:14:58,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 3635 transitions, 86500 flow [2022-11-25 18:15:10,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 629 places, 3635 transitions, 85469 flow, removed 458 selfloop flow, removed 23 redundant places. [2022-11-25 18:15:10,563 INFO L231 Difference]: Finished difference. Result has 666 places, 3295 transitions, 83524 flow [2022-11-25 18:15:10,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=54420, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=83524, PETRI_PLACES=666, PETRI_TRANSITIONS=3295} [2022-11-25 18:15:10,565 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 635 predicate places. [2022-11-25 18:15:10,565 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 3295 transitions, 83524 flow [2022-11-25 18:15:10,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.78787878787878) internal successors, (2336), 33 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:10,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:15:10,566 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:15:10,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:15:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:10,772 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 18:15:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:15:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash 739515263, now seen corresponding path program 9 times [2022-11-25 18:15:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:15:10,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668135258] [2022-11-25 18:15:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:15:10,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:15:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:15:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:15:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668135258] [2022-11-25 18:15:14,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668135258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:15:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709225860] [2022-11-25 18:15:14,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:15:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:15:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:15:14,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:15:14,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:15:14,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:15:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:15:14,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 18:15:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:15:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:15,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:15:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:15:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709225860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:15:17,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:15:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-11-25 18:15:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174384813] [2022-11-25 18:15:17,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:15:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 18:15:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:15:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 18:15:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=620, Unknown=1, NotChecked=0, Total=756 [2022-11-25 18:15:20,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2022-11-25 18:15:20,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 3295 transitions, 83524 flow. Second operand has 28 states, 28 states have (on average 73.10714285714286) internal successors, (2047), 28 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:15:20,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:15:20,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2022-11-25 18:15:20,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:16:11,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 18:16:27,127 INFO L130 PetriNetUnfolder]: 8759/15392 cut-off events. [2022-11-25 18:16:27,127 INFO L131 PetriNetUnfolder]: For 433925/433925 co-relation queries the response was YES. [2022-11-25 18:16:27,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167839 conditions, 15392 events. 8759/15392 cut-off events. For 433925/433925 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 122547 event pairs, 161 based on Foata normal form. 12/15404 useless extension candidates. Maximal degree in co-relation 167641. Up to 6120 conditions per place. [2022-11-25 18:16:27,503 INFO L137 encePairwiseOnDemand]: 185/193 looper letters, 1332 selfloop transitions, 2653 changer transitions 125/4110 dead transitions. [2022-11-25 18:16:27,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 4110 transitions, 109797 flow [2022-11-25 18:16:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 18:16:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-11-25 18:16:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5864 transitions. [2022-11-25 18:16:27,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3945898660924568 [2022-11-25 18:16:27,513 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5864 transitions. [2022-11-25 18:16:27,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5864 transitions. [2022-11-25 18:16:27,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:16:27,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5864 transitions. [2022-11-25 18:16:27,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 76.15584415584415) internal successors, (5864), 77 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:27,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 193.0) internal successors, (15054), 78 states have internal predecessors, (15054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:27,538 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 193.0) internal successors, (15054), 78 states have internal predecessors, (15054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:27,539 INFO L175 Difference]: Start difference. First operand has 666 places, 3295 transitions, 83524 flow. Second operand 77 states and 5864 transitions. [2022-11-25 18:16:27,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 4110 transitions, 109797 flow [2022-11-25 18:16:47,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 4110 transitions, 107234 flow, removed 1161 selfloop flow, removed 21 redundant places. [2022-11-25 18:16:47,585 INFO L231 Difference]: Finished difference. Result has 743 places, 3704 transitions, 99807 flow [2022-11-25 18:16:47,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=81897, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=99807, PETRI_PLACES=743, PETRI_TRANSITIONS=3704} [2022-11-25 18:16:47,588 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 712 predicate places. [2022-11-25 18:16:47,588 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 3704 transitions, 99807 flow [2022-11-25 18:16:47,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 73.10714285714286) internal successors, (2047), 28 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:47,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:16:47,589 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:16:47,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:16:47,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:47,790 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 18:16:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:16:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 235355371, now seen corresponding path program 10 times [2022-11-25 18:16:47,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:16:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859402696] [2022-11-25 18:16:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:16:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:16:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:16:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:16:49,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:16:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859402696] [2022-11-25 18:16:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859402696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:16:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223555885] [2022-11-25 18:16:49,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:16:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:16:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:16:49,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:16:49,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:16:49,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:16:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:16:49,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 18:16:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:16:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:50,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:16:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:16:52,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223555885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:16:52,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:16:52,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 32 [2022-11-25 18:16:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003734238] [2022-11-25 18:16:52,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:16:52,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 18:16:52,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:16:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 18:16:52,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 18:16:54,260 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2022-11-25 18:16:54,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 3704 transitions, 99807 flow. Second operand has 34 states, 34 states have (on average 72.82352941176471) internal successors, (2476), 34 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:16:54,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:16:54,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2022-11-25 18:16:54,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:18:01,592 INFO L130 PetriNetUnfolder]: 10839/18995 cut-off events. [2022-11-25 18:18:01,592 INFO L131 PetriNetUnfolder]: For 550284/550284 co-relation queries the response was YES. [2022-11-25 18:18:02,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211236 conditions, 18995 events. 10839/18995 cut-off events. For 550284/550284 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 155625 event pairs, 28 based on Foata normal form. 19/19014 useless extension candidates. Maximal degree in co-relation 211007. Up to 4366 conditions per place. [2022-11-25 18:18:02,148 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 536 selfloop transitions, 4422 changer transitions 183/5141 dead transitions. [2022-11-25 18:18:02,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 5141 transitions, 141836 flow [2022-11-25 18:18:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-25 18:18:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2022-11-25 18:18:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 8724 transitions. [2022-11-25 18:18:02,158 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3930615003379139 [2022-11-25 18:18:02,159 INFO L72 ComplementDD]: Start complementDD. Operand 115 states and 8724 transitions. [2022-11-25 18:18:02,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 8724 transitions. [2022-11-25 18:18:02,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:18:02,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 115 states and 8724 transitions. [2022-11-25 18:18:02,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 116 states, 115 states have (on average 75.86086956521739) internal successors, (8724), 115 states have internal predecessors, (8724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:02,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 116 states, 116 states have (on average 193.0) internal successors, (22388), 116 states have internal predecessors, (22388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:02,196 INFO L81 ComplementDD]: Finished complementDD. Result has 116 states, 116 states have (on average 193.0) internal successors, (22388), 116 states have internal predecessors, (22388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:02,196 INFO L175 Difference]: Start difference. First operand has 743 places, 3704 transitions, 99807 flow. Second operand 115 states and 8724 transitions. [2022-11-25 18:18:02,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 5141 transitions, 141836 flow [2022-11-25 18:18:31,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 5141 transitions, 140792 flow, removed 468 selfloop flow, removed 27 redundant places. [2022-11-25 18:18:31,671 INFO L231 Difference]: Finished difference. Result has 835 places, 4773 transitions, 139088 flow [2022-11-25 18:18:31,673 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=99179, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=115, PETRI_FLOW=139088, PETRI_PLACES=835, PETRI_TRANSITIONS=4773} [2022-11-25 18:18:31,674 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 804 predicate places. [2022-11-25 18:18:31,674 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 4773 transitions, 139088 flow [2022-11-25 18:18:31,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 72.82352941176471) internal successors, (2476), 34 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:31,674 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:18:31,674 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:18:31,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:18:31,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:18:31,875 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 18:18:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:18:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash -124460147, now seen corresponding path program 11 times [2022-11-25 18:18:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:18:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904960402] [2022-11-25 18:18:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:18:31,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:18:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:18:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:18:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:18:33,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904960402] [2022-11-25 18:18:33,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904960402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:18:33,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716347181] [2022-11-25 18:18:33,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:18:33,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:18:33,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:18:33,589 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:18:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93e82150-539d-45e5-bd2a-755ab625173e/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:18:33,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 18:18:33,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:18:33,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 18:18:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:18:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:18:35,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:18:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:18:39,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716347181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:18:39,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:18:39,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-11-25 18:18:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910688393] [2022-11-25 18:18:39,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:18:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 18:18:39,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:18:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 18:18:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:18:41,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 193 [2022-11-25 18:18:41,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 4773 transitions, 139088 flow. Second operand has 29 states, 29 states have (on average 72.79310344827586) internal successors, (2111), 29 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:18:41,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:18:41,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 193 [2022-11-25 18:18:41,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:22:00,792 INFO L130 PetriNetUnfolder]: 14682/25478 cut-off events. [2022-11-25 18:22:00,792 INFO L131 PetriNetUnfolder]: For 822243/822243 co-relation queries the response was YES. [2022-11-25 18:22:01,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308790 conditions, 25478 events. 14682/25478 cut-off events. For 822243/822243 co-relation queries the response was YES. Maximal size of possible extension queue 1628. Compared 215051 event pairs, 263 based on Foata normal form. 21/25499 useless extension candidates. Maximal degree in co-relation 308557. Up to 5934 conditions per place. [2022-11-25 18:22:01,645 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 1142 selfloop transitions, 5771 changer transitions 297/7210 dead transitions. [2022-11-25 18:22:01,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 945 places, 7210 transitions, 219103 flow [2022-11-25 18:22:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-11-25 18:22:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2022-11-25 18:22:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 9904 transitions. [2022-11-25 18:22:01,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3917256654669145 [2022-11-25 18:22:01,658 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 9904 transitions. [2022-11-25 18:22:01,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 9904 transitions. [2022-11-25 18:22:01,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:01,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 9904 transitions. [2022-11-25 18:22:01,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 75.6030534351145) internal successors, (9904), 131 states have internal predecessors, (9904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:01,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 193.0) internal successors, (25476), 132 states have internal predecessors, (25476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:01,702 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 193.0) internal successors, (25476), 132 states have internal predecessors, (25476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:22:01,702 INFO L175 Difference]: Start difference. First operand has 835 places, 4773 transitions, 139088 flow. Second operand 131 states and 9904 transitions. [2022-11-25 18:22:01,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 945 places, 7210 transitions, 219103 flow