./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:25:28,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:25:28,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:25:28,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:25:28,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:25:28,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:25:28,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:25:28,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:25:28,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:25:28,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:25:28,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:25:28,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:25:28,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:25:28,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:25:28,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:25:28,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:25:28,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:25:28,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:25:28,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:25:28,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:25:28,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:25:28,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:25:28,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:25:28,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:25:28,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:25:28,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:25:28,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:25:28,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:25:28,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:25:28,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:25:28,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:25:28,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:25:28,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:25:28,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:25:28,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:25:28,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:25:28,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:25:28,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:25:28,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:25:28,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:25:28,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:25:28,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:25:28,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:25:28,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:25:28,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:25:28,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:25:28,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:25:28,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:25:28,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:25:28,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:25:28,897 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:25:28,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:25:28,897 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:25:28,898 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:25:28,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:25:28,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:25:28,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:25:28,898 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:25:28,899 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:25:28,899 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:25:28,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:25:28,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:25:28,899 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:25:28,899 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:25:28,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:25:28,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:25:28,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:25:28,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:25:28,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:25:28,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:25:28,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:25:28,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:25:28,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:25:28,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:25:28,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:25:28,902 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:25:28,902 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_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-12-13 22:25:29,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:25:29,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:25:29,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:25:29,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:25:29,100 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:25:29,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-12-13 22:25:31,729 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:25:31,848 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:25:31,849 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-12-13 22:25:31,853 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/data/683bbbfec/fc01d99a9cb8429e88790f94993fe4da/FLAGb822b1c4c [2022-12-13 22:25:31,864 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/data/683bbbfec/fc01d99a9cb8429e88790f94993fe4da [2022-12-13 22:25:31,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:25:31,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:25:31,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:25:31,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:25:31,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:25:31,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:25:31" (1/1) ... [2022-12-13 22:25:31,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@946f386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:31, skipping insertion in model container [2022-12-13 22:25:31,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:25:31" (1/1) ... [2022-12-13 22:25:31,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:25:31,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:25:32,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:25:32,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:25:32,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:25:32,005 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:25:32,009 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_083bd451-096f-4691-93b6-a3b9a793ffff/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-12-13 22:25:32,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:25:32,031 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:25:32,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:25:32,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:25:32,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:25:32,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:25:32,051 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_083bd451-096f-4691-93b6-a3b9a793ffff/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-12-13 22:25:32,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:25:32,078 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:25:32,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32 WrapperNode [2022-12-13 22:25:32,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:25:32,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:25:32,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:25:32,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:25:32,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,112 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-12-13 22:25:32,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:25:32,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:25:32,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:25:32,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:25:32,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,132 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:25:32,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:25:32,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:25:32,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:25:32,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (1/1) ... [2022-12-13 22:25:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:25:32,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:32,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:25:32,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:25:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:25:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 22:25:32,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 22:25:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 22:25:32,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 22:25:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:25:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:25:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:25:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 22:25:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 22:25:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:25:32,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:25:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:25:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:25:32,203 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:25:32,286 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:25:32,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:25:32,441 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:25:32,473 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:25:32,473 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 22:25:32,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:25:32 BoogieIcfgContainer [2022-12-13 22:25:32,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:25:32,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:25:32,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:25:32,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:25:32,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:25:31" (1/3) ... [2022-12-13 22:25:32,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739eb3a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:25:32, skipping insertion in model container [2022-12-13 22:25:32,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:25:32" (2/3) ... [2022-12-13 22:25:32,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739eb3a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:25:32, skipping insertion in model container [2022-12-13 22:25:32,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:25:32" (3/3) ... [2022-12-13 22:25:32,482 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-12-13 22:25:32,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:25:32,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 22:25:32,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:25:32,542 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 22:25:32,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 89 transitions, 194 flow [2022-12-13 22:25:32,610 INFO L130 PetriNetUnfolder]: 5/87 cut-off events. [2022-12-13 22:25:32,610 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 22:25:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 5/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-13 22:25:32,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 89 transitions, 194 flow [2022-12-13 22:25:32,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 82 transitions, 176 flow [2022-12-13 22:25:32,622 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:25:32,630 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 82 transitions, 176 flow [2022-12-13 22:25:32,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 82 transitions, 176 flow [2022-12-13 22:25:32,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 82 transitions, 176 flow [2022-12-13 22:25:32,656 INFO L130 PetriNetUnfolder]: 5/82 cut-off events. [2022-12-13 22:25:32,656 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 22:25:32,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 5/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-13 22:25:32,658 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-12-13 22:25:34,775 INFO L134 LiptonReduction]: Checked pairs total: 727 [2022-12-13 22:25:34,775 INFO L136 LiptonReduction]: Total number of compositions: 83 [2022-12-13 22:25:34,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:25:34,790 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;@5cf9b8e9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:25:34,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 22:25:34,791 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 22:25:34,791 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:25:34,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:34,792 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 22:25:34,792 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)] === [2022-12-13 22:25:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 362, now seen corresponding path program 1 times [2022-12-13 22:25:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:34,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045046021] [2022-12-13 22:25:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:34,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045046021] [2022-12-13 22:25:34,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045046021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:34,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:34,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 22:25:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391081828] [2022-12-13 22:25:34,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:34,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 22:25:34,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 22:25:34,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:25:34,890 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2022-12-13 22:25:34,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:34,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2022-12-13 22:25:34,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:34,936 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2022-12-13 22:25:34,936 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 22:25:34,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 500 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2022-12-13 22:25:34,938 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-12-13 22:25:34,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-12-13 22:25:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 22:25:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 22:25:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 180 transitions. [2022-12-13 22:25:34,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2022-12-13 22:25:34,948 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 180 transitions. [2022-12-13 22:25:34,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 180 transitions. [2022-12-13 22:25:34,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:34,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 180 transitions. [2022-12-13 22:25:34,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,955 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,957 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 180 transitions. [2022-12-13 22:25:34,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-12-13 22:25:34,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 22:25:34,960 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-12-13 22:25:34,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-12-13 22:25:34,963 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 22:25:34,964 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-12-13 22:25:34,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:34,964 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 22:25:34,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:25:34,964 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)] === [2022-12-13 22:25:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash 354899, now seen corresponding path program 1 times [2022-12-13 22:25:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:34,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737384287] [2022-12-13 22:25:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737384287] [2022-12-13 22:25:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737384287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:35,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:35,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:25:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855573849] [2022-12-13 22:25:35,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:25:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:25:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:25:35,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 172 [2022-12-13 22:25:35,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:35,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 172 [2022-12-13 22:25:35,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:35,141 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2022-12-13 22:25:35,141 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:25:35,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 444 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2022-12-13 22:25:35,142 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 22:25:35,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-12-13 22:25:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2022-12-13 22:25:35,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46705426356589147 [2022-12-13 22:25:35,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2022-12-13 22:25:35,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2022-12-13 22:25:35,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2022-12-13 22:25:35,148 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) [2022-12-13 22:25:35,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,152 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 241 transitions. [2022-12-13 22:25:35,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-12-13 22:25:35,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:25:35,153 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-12-13 22:25:35,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-12-13 22:25:35,154 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-12-13 22:25:35,154 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-12-13 22:25:35,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:35,155 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 22:25:35,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:25:35,155 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)] === [2022-12-13 22:25:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 354898, now seen corresponding path program 1 times [2022-12-13 22:25:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722277991] [2022-12-13 22:25:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722277991] [2022-12-13 22:25:35,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722277991] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:35,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:35,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:25:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623481494] [2022-12-13 22:25:35,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:35,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:25:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:25:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:25:35,248 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-12-13 22:25:35,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:35,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-12-13 22:25:35,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:35,282 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2022-12-13 22:25:35,282 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:25:35,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 396 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2022-12-13 22:25:35,284 INFO L137 encePairwiseOnDemand]: 169/172 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 22:25:35,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-12-13 22:25:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2022-12-13 22:25:35,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43992248062015504 [2022-12-13 22:25:35,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2022-12-13 22:25:35,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2022-12-13 22:25:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2022-12-13 22:25:35,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,287 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 227 transitions. [2022-12-13 22:25:35,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-12-13 22:25:35,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:35,288 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-12-13 22:25:35,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-12-13 22:25:35,288 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 22:25:35,288 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-12-13 22:25:35,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:35,289 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:25:35,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:25:35,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash 341064037, now seen corresponding path program 1 times [2022-12-13 22:25:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:35,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677492782] [2022-12-13 22:25:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:35,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677492782] [2022-12-13 22:25:35,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677492782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:35,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:35,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:25:35,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015580828] [2022-12-13 22:25:35,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:35,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:35,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:35,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:35,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2022-12-13 22:25:35,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:35,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2022-12-13 22:25:35,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:35,463 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2022-12-13 22:25:35,463 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:25:35,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 286 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2022-12-13 22:25:35,464 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-12-13 22:25:35,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-12-13 22:25:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-12-13 22:25:35,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2022-12-13 22:25:35,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-12-13 22:25:35,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-12-13 22:25:35,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-12-13 22:25:35,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,469 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 231 transitions. [2022-12-13 22:25:35,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-12-13 22:25:35,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:35,470 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-12-13 22:25:35,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-12-13 22:25:35,470 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 22:25:35,470 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-12-13 22:25:35,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:35,471 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:25:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:25:35,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash 341064036, now seen corresponding path program 1 times [2022-12-13 22:25:35,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2358017] [2022-12-13 22:25:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2358017] [2022-12-13 22:25:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2358017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:35,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:35,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:25:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749913710] [2022-12-13 22:25:35,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:35,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:35,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:35,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:35,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:35,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 172 [2022-12-13 22:25:35,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:35,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 172 [2022-12-13 22:25:35,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:35,584 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2022-12-13 22:25:35,584 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:25:35,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 172 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2022-12-13 22:25:35,585 INFO L137 encePairwiseOnDemand]: 170/172 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-12-13 22:25:35,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-12-13 22:25:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2022-12-13 22:25:35,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2022-12-13 22:25:35,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2022-12-13 22:25:35,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2022-12-13 22:25:35,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2022-12-13 22:25:35,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,589 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 212 transitions. [2022-12-13 22:25:35,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-12-13 22:25:35,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:35,590 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-12-13 22:25:35,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-12-13 22:25:35,590 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-12-13 22:25:35,591 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-12-13 22:25:35,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,591 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:35,591 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 22:25:35,591 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)] === [2022-12-13 22:25:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash -910080008, now seen corresponding path program 1 times [2022-12-13 22:25:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085611845] [2022-12-13 22:25:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:35,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085611845] [2022-12-13 22:25:35,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085611845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:35,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:35,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:25:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275392519] [2022-12-13 22:25:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:25:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:25:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:25:35,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-12-13 22:25:35,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:35,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-12-13 22:25:35,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:35,697 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-12-13 22:25:35,697 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:25:35,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 259 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2022-12-13 22:25:35,698 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-12-13 22:25:35,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2022-12-13 22:25:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2022-12-13 22:25:35,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 22:25:35,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2022-12-13 22:25:35,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2022-12-13 22:25:35,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2022-12-13 22:25:35,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,702 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 258 transitions. [2022-12-13 22:25:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2022-12-13 22:25:35,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:35,704 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2022-12-13 22:25:35,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2022-12-13 22:25:35,705 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2022-12-13 22:25:35,705 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2022-12-13 22:25:35,705 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) [2022-12-13 22:25:35,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:35,705 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:35,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 22:25:35,706 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)] === [2022-12-13 22:25:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash -949920867, now seen corresponding path program 1 times [2022-12-13 22:25:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:35,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204490614] [2022-12-13 22:25:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204490614] [2022-12-13 22:25:35,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204490614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:35,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:35,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:25:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284118711] [2022-12-13 22:25:35,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:35,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:35,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:35,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-12-13 22:25:35,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:35,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-12-13 22:25:35,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:35,873 INFO L130 PetriNetUnfolder]: 68/137 cut-off events. [2022-12-13 22:25:35,873 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 22:25:35,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 137 events. 68/137 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 418 event pairs, 24 based on Foata normal form. 2/139 useless extension candidates. Maximal degree in co-relation 320. Up to 74 conditions per place. [2022-12-13 22:25:35,874 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 19 selfloop transitions, 4 changer transitions 17/40 dead transitions. [2022-12-13 22:25:35,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 189 flow [2022-12-13 22:25:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:25:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:25:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2022-12-13 22:25:35,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44670542635658916 [2022-12-13 22:25:35,876 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2022-12-13 22:25:35,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2022-12-13 22:25:35,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:35,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2022-12-13 22:25:35,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,880 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,881 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 6 states and 461 transitions. [2022-12-13 22:25:35,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 189 flow [2022-12-13 22:25:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 40 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:35,882 INFO L231 Difference]: Finished difference. Result has 31 places, 18 transitions, 79 flow [2022-12-13 22:25:35,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=31, PETRI_TRANSITIONS=18} [2022-12-13 22:25:35,883 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-12-13 22:25:35,883 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 18 transitions, 79 flow [2022-12-13 22:25:35,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:35,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:35,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:25:35,884 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)] === [2022-12-13 22:25:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash 255465615, now seen corresponding path program 2 times [2022-12-13 22:25:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680313060] [2022-12-13 22:25:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:35,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680313060] [2022-12-13 22:25:35,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680313060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048802178] [2022-12-13 22:25:35,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:25:35,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:35,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:35,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:25:35,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:25:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:35,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:25:35,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:36,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:36,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048802178] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:36,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:36,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 22:25:36,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265293772] [2022-12-13 22:25:36,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:25:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:25:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:25:36,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:36,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 18 transitions, 79 flow. Second operand has 8 states, 8 states have (on average 71.75) internal successors, (574), 8 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:36,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:36,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:36,197 INFO L130 PetriNetUnfolder]: 56/105 cut-off events. [2022-12-13 22:25:36,197 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-12-13 22:25:36,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 105 events. 56/105 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 271 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 331. Up to 62 conditions per place. [2022-12-13 22:25:36,199 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 28 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2022-12-13 22:25:36,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 194 flow [2022-12-13 22:25:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 378 transitions. [2022-12-13 22:25:36,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2022-12-13 22:25:36,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 378 transitions. [2022-12-13 22:25:36,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 378 transitions. [2022-12-13 22:25:36,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:36,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 378 transitions. [2022-12-13 22:25:36,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,202 INFO L175 Difference]: Start difference. First operand has 31 places, 18 transitions, 79 flow. Second operand 5 states and 378 transitions. [2022-12-13 22:25:36,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 194 flow [2022-12-13 22:25:36,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 178 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-13 22:25:36,204 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 95 flow [2022-12-13 22:25:36,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=95, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2022-12-13 22:25:36,204 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-12-13 22:25:36,205 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 95 flow [2022-12-13 22:25:36,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.75) internal successors, (574), 8 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:36,205 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:36,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:25:36,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:36,406 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)] === [2022-12-13 22:25:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2098381023, now seen corresponding path program 3 times [2022-12-13 22:25:36,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:36,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452302448] [2022-12-13 22:25:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:36,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452302448] [2022-12-13 22:25:36,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452302448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:36,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:36,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:25:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80181183] [2022-12-13 22:25:36,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:36,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 172 [2022-12-13 22:25:36,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:36,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 172 [2022-12-13 22:25:36,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:36,553 INFO L130 PetriNetUnfolder]: 71/136 cut-off events. [2022-12-13 22:25:36,553 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-12-13 22:25:36,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 136 events. 71/136 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 351 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 459. Up to 75 conditions per place. [2022-12-13 22:25:36,555 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 31 selfloop transitions, 6 changer transitions 2/39 dead transitions. [2022-12-13 22:25:36,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 250 flow [2022-12-13 22:25:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 388 transitions. [2022-12-13 22:25:36,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2022-12-13 22:25:36,557 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 388 transitions. [2022-12-13 22:25:36,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 388 transitions. [2022-12-13 22:25:36,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:36,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 388 transitions. [2022-12-13 22:25:36,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.6) internal successors, (388), 5 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,561 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,561 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 95 flow. Second operand 5 states and 388 transitions. [2022-12-13 22:25:36,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 250 flow [2022-12-13 22:25:36,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 238 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:36,563 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 128 flow [2022-12-13 22:25:36,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2022-12-13 22:25:36,564 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2022-12-13 22:25:36,564 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 128 flow [2022-12-13 22:25:36,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:36,565 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 22:25:36,565 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)] === [2022-12-13 22:25:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1273862621, now seen corresponding path program 4 times [2022-12-13 22:25:36,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:36,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863298787] [2022-12-13 22:25:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:36,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863298787] [2022-12-13 22:25:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863298787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:36,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060255098] [2022-12-13 22:25:36,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:25:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:36,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:36,631 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:36,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:25:36,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:25:36,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:36,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:25:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:36,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:36,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060255098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:36,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:36,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-13 22:25:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126120241] [2022-12-13 22:25:36,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:36,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:25:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:25:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:25:36,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:36,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 22 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 72.0) internal successors, (720), 10 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:36,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:36,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:36,903 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2022-12-13 22:25:36,903 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-12-13 22:25:36,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 161 events. 86/161 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 467 event pairs, 10 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 633. Up to 102 conditions per place. [2022-12-13 22:25:36,904 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 38 selfloop transitions, 9 changer transitions 1/48 dead transitions. [2022-12-13 22:25:36,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 329 flow [2022-12-13 22:25:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:25:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:25:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 599 transitions. [2022-12-13 22:25:36,906 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43531976744186046 [2022-12-13 22:25:36,906 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 599 transitions. [2022-12-13 22:25:36,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 599 transitions. [2022-12-13 22:25:36,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:36,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 599 transitions. [2022-12-13 22:25:36,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.875) internal successors, (599), 8 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,909 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,909 INFO L175 Difference]: Start difference. First operand has 37 places, 22 transitions, 128 flow. Second operand 8 states and 599 transitions. [2022-12-13 22:25:36,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 329 flow [2022-12-13 22:25:36,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 312 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:36,911 INFO L231 Difference]: Finished difference. Result has 43 places, 25 transitions, 162 flow [2022-12-13 22:25:36,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=162, PETRI_PLACES=43, PETRI_TRANSITIONS=25} [2022-12-13 22:25:36,912 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-12-13 22:25:36,912 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 25 transitions, 162 flow [2022-12-13 22:25:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 72.0) internal successors, (720), 10 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:36,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:36,912 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:36,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:25:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 22:25:37,113 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)] === [2022-12-13 22:25:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1167013761, now seen corresponding path program 5 times [2022-12-13 22:25:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:37,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237104965] [2022-12-13 22:25:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:37,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:37,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237104965] [2022-12-13 22:25:37,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237104965] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:37,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:37,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:25:37,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305367288] [2022-12-13 22:25:37,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:37,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:37,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:37,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:37,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:37,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-12-13 22:25:37,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 25 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:37,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-12-13 22:25:37,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:37,250 INFO L130 PetriNetUnfolder]: 84/159 cut-off events. [2022-12-13 22:25:37,250 INFO L131 PetriNetUnfolder]: For 468/468 co-relation queries the response was YES. [2022-12-13 22:25:37,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 159 events. 84/159 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 435 event pairs, 25 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 657. Up to 87 conditions per place. [2022-12-13 22:25:37,251 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 26 selfloop transitions, 9 changer transitions 2/37 dead transitions. [2022-12-13 22:25:37,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 291 flow [2022-12-13 22:25:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2022-12-13 22:25:37,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-12-13 22:25:37,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 380 transitions. [2022-12-13 22:25:37,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 380 transitions. [2022-12-13 22:25:37,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:37,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 380 transitions. [2022-12-13 22:25:37,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,257 INFO L175 Difference]: Start difference. First operand has 43 places, 25 transitions, 162 flow. Second operand 5 states and 380 transitions. [2022-12-13 22:25:37,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 291 flow [2022-12-13 22:25:37,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 267 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-12-13 22:25:37,259 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 190 flow [2022-12-13 22:25:37,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2022-12-13 22:25:37,260 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2022-12-13 22:25:37,260 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 190 flow [2022-12-13 22:25:37,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,261 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:37,261 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:37,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 22:25:37,261 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)] === [2022-12-13 22:25:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:37,261 INFO L85 PathProgramCache]: Analyzing trace with hash -180919567, now seen corresponding path program 6 times [2022-12-13 22:25:37,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362226919] [2022-12-13 22:25:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:37,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362226919] [2022-12-13 22:25:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362226919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:37,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:25:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33079045] [2022-12-13 22:25:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:37,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:37,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 172 [2022-12-13 22:25:37,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:37,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 172 [2022-12-13 22:25:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:37,401 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2022-12-13 22:25:37,401 INFO L131 PetriNetUnfolder]: For 567/567 co-relation queries the response was YES. [2022-12-13 22:25:37,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 140 events. 75/140 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 603. Up to 87 conditions per place. [2022-12-13 22:25:37,403 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2022-12-13 22:25:37,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 306 flow [2022-12-13 22:25:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2022-12-13 22:25:37,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2022-12-13 22:25:37,404 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2022-12-13 22:25:37,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2022-12-13 22:25:37,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:37,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2022-12-13 22:25:37,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,406 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,406 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 190 flow. Second operand 5 states and 382 transitions. [2022-12-13 22:25:37,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 306 flow [2022-12-13 22:25:37,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 295 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:37,408 INFO L231 Difference]: Finished difference. Result has 46 places, 26 transitions, 183 flow [2022-12-13 22:25:37,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=46, PETRI_TRANSITIONS=26} [2022-12-13 22:25:37,408 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2022-12-13 22:25:37,408 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 26 transitions, 183 flow [2022-12-13 22:25:37,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:37,409 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:37,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 22:25:37,409 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)] === [2022-12-13 22:25:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 961104226, now seen corresponding path program 1 times [2022-12-13 22:25:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480551264] [2022-12-13 22:25:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480551264] [2022-12-13 22:25:37,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480551264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566350962] [2022-12-13 22:25:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:37,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:37,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:37,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:37,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:25:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 22:25:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:37,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:37,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566350962] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:37,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:37,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-12-13 22:25:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028860542] [2022-12-13 22:25:37,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:37,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-12-13 22:25:37,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 26 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:37,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-12-13 22:25:37,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:37,668 INFO L130 PetriNetUnfolder]: 122/230 cut-off events. [2022-12-13 22:25:37,669 INFO L131 PetriNetUnfolder]: For 726/739 co-relation queries the response was YES. [2022-12-13 22:25:37,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 230 events. 122/230 cut-off events. For 726/739 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 786 event pairs, 16 based on Foata normal form. 18/246 useless extension candidates. Maximal degree in co-relation 955. Up to 113 conditions per place. [2022-12-13 22:25:37,671 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-12-13 22:25:37,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 386 flow [2022-12-13 22:25:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:25:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:25:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2022-12-13 22:25:37,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5043604651162791 [2022-12-13 22:25:37,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2022-12-13 22:25:37,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2022-12-13 22:25:37,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:37,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2022-12-13 22:25:37,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,674 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,674 INFO L175 Difference]: Start difference. First operand has 46 places, 26 transitions, 183 flow. Second operand 4 states and 347 transitions. [2022-12-13 22:25:37,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 386 flow [2022-12-13 22:25:37,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 335 flow, removed 5 selfloop flow, removed 7 redundant places. [2022-12-13 22:25:37,676 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 246 flow [2022-12-13 22:25:37,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2022-12-13 22:25:37,677 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2022-12-13 22:25:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 246 flow [2022-12-13 22:25:37,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:37,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:37,677 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:37,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:25:37,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:25:37,878 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)] === [2022-12-13 22:25:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1529215619, now seen corresponding path program 2 times [2022-12-13 22:25:37,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:37,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077046477] [2022-12-13 22:25:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:37,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077046477] [2022-12-13 22:25:37,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077046477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16536907] [2022-12-13 22:25:37,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:25:37,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:37,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:37,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:37,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:25:38,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:25:38,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:38,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:25:38,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:38,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:38,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16536907] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:38,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:38,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 22:25:38,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398393200] [2022-12-13 22:25:38,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:38,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 22:25:38,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 22:25:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 22:25:38,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:38,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 246 flow. Second operand has 12 states, 12 states have (on average 71.08333333333333) internal successors, (853), 12 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:38,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:38,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:38,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:38,492 INFO L130 PetriNetUnfolder]: 236/464 cut-off events. [2022-12-13 22:25:38,492 INFO L131 PetriNetUnfolder]: For 1045/1045 co-relation queries the response was YES. [2022-12-13 22:25:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 464 events. 236/464 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2013 event pairs, 7 based on Foata normal form. 16/480 useless extension candidates. Maximal degree in co-relation 1862. Up to 157 conditions per place. [2022-12-13 22:25:38,496 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 83 selfloop transitions, 44 changer transitions 6/133 dead transitions. [2022-12-13 22:25:38,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 133 transitions, 1055 flow [2022-12-13 22:25:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:25:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 22:25:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1490 transitions. [2022-12-13 22:25:38,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2022-12-13 22:25:38,500 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1490 transitions. [2022-12-13 22:25:38,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1490 transitions. [2022-12-13 22:25:38,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:38,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1490 transitions. [2022-12-13 22:25:38,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 74.5) internal successors, (1490), 20 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:38,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:38,507 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:38,508 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 246 flow. Second operand 20 states and 1490 transitions. [2022-12-13 22:25:38,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 133 transitions, 1055 flow [2022-12-13 22:25:38,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 133 transitions, 1021 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-12-13 22:25:38,511 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 701 flow [2022-12-13 22:25:38,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=701, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2022-12-13 22:25:38,512 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2022-12-13 22:25:38,512 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 701 flow [2022-12-13 22:25:38,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.08333333333333) internal successors, (853), 12 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:38,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:38,512 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:38,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:25:38,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:38,713 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)] === [2022-12-13 22:25:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 958955913, now seen corresponding path program 3 times [2022-12-13 22:25:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:38,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671219658] [2022-12-13 22:25:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:38,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:38,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:38,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671219658] [2022-12-13 22:25:38,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671219658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:38,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099871673] [2022-12-13 22:25:38,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:25:38,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:38,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:38,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:38,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:25:38,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 22:25:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:38,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:25:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:38,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099871673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:38,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:38,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 22:25:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811543456] [2022-12-13 22:25:38,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 22:25:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 22:25:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:25:38,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:38,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 701 flow. Second operand has 11 states, 11 states have (on average 71.0909090909091) internal successors, (782), 11 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:38,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:38,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:38,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:39,137 INFO L130 PetriNetUnfolder]: 246/505 cut-off events. [2022-12-13 22:25:39,137 INFO L131 PetriNetUnfolder]: For 2065/2065 co-relation queries the response was YES. [2022-12-13 22:25:39,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 505 events. 246/505 cut-off events. For 2065/2065 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2341 event pairs, 13 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 2430. Up to 346 conditions per place. [2022-12-13 22:25:39,142 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 84 selfloop transitions, 19 changer transitions 12/115 dead transitions. [2022-12-13 22:25:39,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 115 transitions, 1248 flow [2022-12-13 22:25:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:25:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 22:25:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 531 transitions. [2022-12-13 22:25:39,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4410299003322259 [2022-12-13 22:25:39,144 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 531 transitions. [2022-12-13 22:25:39,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 531 transitions. [2022-12-13 22:25:39,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:39,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 531 transitions. [2022-12-13 22:25:39,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,147 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,148 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 701 flow. Second operand 7 states and 531 transitions. [2022-12-13 22:25:39,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 115 transitions, 1248 flow [2022-12-13 22:25:39,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 115 transitions, 957 flow, removed 130 selfloop flow, removed 6 redundant places. [2022-12-13 22:25:39,161 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 665 flow [2022-12-13 22:25:39,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2022-12-13 22:25:39,162 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2022-12-13 22:25:39,162 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 665 flow [2022-12-13 22:25:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 71.0909090909091) internal successors, (782), 11 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:39,163 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:39,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:25:39,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:39,364 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)] === [2022-12-13 22:25:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 619714305, now seen corresponding path program 4 times [2022-12-13 22:25:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:39,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293330096] [2022-12-13 22:25:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:39,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293330096] [2022-12-13 22:25:39,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293330096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002219067] [2022-12-13 22:25:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:25:39,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:39,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:39,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:25:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:25:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:25:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:39,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002219067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:39,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:39,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-13 22:25:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421263095] [2022-12-13 22:25:39,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:39,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 22:25:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 22:25:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 22:25:39,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:39,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 665 flow. Second operand has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:39,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:39,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:39,888 INFO L130 PetriNetUnfolder]: 232/475 cut-off events. [2022-12-13 22:25:39,888 INFO L131 PetriNetUnfolder]: For 1605/1605 co-relation queries the response was YES. [2022-12-13 22:25:39,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 475 events. 232/475 cut-off events. For 1605/1605 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2238 event pairs, 9 based on Foata normal form. 34/509 useless extension candidates. Maximal degree in co-relation 1998. Up to 204 conditions per place. [2022-12-13 22:25:39,890 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 76 selfloop transitions, 46 changer transitions 7/129 dead transitions. [2022-12-13 22:25:39,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 1164 flow [2022-12-13 22:25:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 22:25:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 22:25:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1054 transitions. [2022-12-13 22:25:39,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377076411960133 [2022-12-13 22:25:39,892 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1054 transitions. [2022-12-13 22:25:39,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1054 transitions. [2022-12-13 22:25:39,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:39,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1054 transitions. [2022-12-13 22:25:39,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 75.28571428571429) internal successors, (1054), 14 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,897 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 172.0) internal successors, (2580), 15 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,897 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 665 flow. Second operand 14 states and 1054 transitions. [2022-12-13 22:25:39,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 1164 flow [2022-12-13 22:25:39,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1083 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-12-13 22:25:39,905 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 760 flow [2022-12-13 22:25:39,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=760, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2022-12-13 22:25:39,906 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2022-12-13 22:25:39,906 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 760 flow [2022-12-13 22:25:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:39,906 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:39,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:25:40,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 22:25:40,107 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)] === [2022-12-13 22:25:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash -285528467, now seen corresponding path program 5 times [2022-12-13 22:25:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:40,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507044328] [2022-12-13 22:25:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:40,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507044328] [2022-12-13 22:25:40,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507044328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450354602] [2022-12-13 22:25:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:25:40,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:40,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:40,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:25:40,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 22:25:40,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:40,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:25:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:40,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:40,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450354602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:40,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:40,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 22:25:40,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456951745] [2022-12-13 22:25:40,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:25:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:25:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:25:40,346 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:40,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 760 flow. Second operand has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:40,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:40,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:40,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:40,650 INFO L130 PetriNetUnfolder]: 294/606 cut-off events. [2022-12-13 22:25:40,650 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-12-13 22:25:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2657 conditions, 606 events. 294/606 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2985 event pairs, 61 based on Foata normal form. 42/648 useless extension candidates. Maximal degree in co-relation 2632. Up to 320 conditions per place. [2022-12-13 22:25:40,655 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 105 selfloop transitions, 47 changer transitions 3/155 dead transitions. [2022-12-13 22:25:40,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 1540 flow [2022-12-13 22:25:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 22:25:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 22:25:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 988 transitions. [2022-12-13 22:25:40,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-12-13 22:25:40,658 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 988 transitions. [2022-12-13 22:25:40,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 988 transitions. [2022-12-13 22:25:40,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:40,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 988 transitions. [2022-12-13 22:25:40,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:40,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:40,665 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:40,665 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 760 flow. Second operand 13 states and 988 transitions. [2022-12-13 22:25:40,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 1540 flow [2022-12-13 22:25:40,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 155 transitions, 1485 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-12-13 22:25:40,679 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 1168 flow [2022-12-13 22:25:40,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1168, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2022-12-13 22:25:40,679 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2022-12-13 22:25:40,679 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 1168 flow [2022-12-13 22:25:40,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:40,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:40,680 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:40,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:25:40,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 22:25:40,881 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)] === [2022-12-13 22:25:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash 803859203, now seen corresponding path program 6 times [2022-12-13 22:25:40,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:40,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616835249] [2022-12-13 22:25:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616835249] [2022-12-13 22:25:41,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616835249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686780279] [2022-12-13 22:25:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:25:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:41,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:41,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:25:41,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 22:25:41,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:41,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:25:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:41,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:41,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686780279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:41,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:41,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 22:25:41,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932876466] [2022-12-13 22:25:41,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:41,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:25:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:25:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:25:41,221 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:41,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 1168 flow. Second operand has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 13 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:41,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:41,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:41,485 INFO L130 PetriNetUnfolder]: 309/631 cut-off events. [2022-12-13 22:25:41,485 INFO L131 PetriNetUnfolder]: For 4252/4252 co-relation queries the response was YES. [2022-12-13 22:25:41,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 631 events. 309/631 cut-off events. For 4252/4252 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3143 event pairs, 28 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 3284. Up to 177 conditions per place. [2022-12-13 22:25:41,489 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 85 selfloop transitions, 69 changer transitions 8/162 dead transitions. [2022-12-13 22:25:41,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1910 flow [2022-12-13 22:25:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 22:25:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 22:25:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1259 transitions. [2022-12-13 22:25:41,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43057455540355677 [2022-12-13 22:25:41,491 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1259 transitions. [2022-12-13 22:25:41,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1259 transitions. [2022-12-13 22:25:41,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:41,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1259 transitions. [2022-12-13 22:25:41,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 74.05882352941177) internal successors, (1259), 17 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,495 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,495 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 1168 flow. Second operand 17 states and 1259 transitions. [2022-12-13 22:25:41,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1910 flow [2022-12-13 22:25:41,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 162 transitions, 1678 flow, removed 105 selfloop flow, removed 3 redundant places. [2022-12-13 22:25:41,511 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1298 flow [2022-12-13 22:25:41,512 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1298, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2022-12-13 22:25:41,512 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2022-12-13 22:25:41,512 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1298 flow [2022-12-13 22:25:41,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.92307692307692) internal successors, (922), 13 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:41,512 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:41,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:25:41,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 22:25:41,713 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)] === [2022-12-13 22:25:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 616144674, now seen corresponding path program 7 times [2022-12-13 22:25:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:41,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119595899] [2022-12-13 22:25:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:25:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:41,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119595899] [2022-12-13 22:25:41,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119595899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023716051] [2022-12-13 22:25:41,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:25:41,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:41,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:41,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:41,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:25:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 22:25:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:25:41,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:25:41,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023716051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:41,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:41,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-13 22:25:41,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917952075] [2022-12-13 22:25:41,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:41,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:41,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:41,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:41,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:41,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-12-13 22:25:41,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1298 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:41,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-12-13 22:25:41,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:42,110 INFO L130 PetriNetUnfolder]: 525/1068 cut-off events. [2022-12-13 22:25:42,110 INFO L131 PetriNetUnfolder]: For 6834/6844 co-relation queries the response was YES. [2022-12-13 22:25:42,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 1068 events. 525/1068 cut-off events. For 6834/6844 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6188 event pairs, 57 based on Foata normal form. 30/1096 useless extension candidates. Maximal degree in co-relation 5740. Up to 464 conditions per place. [2022-12-13 22:25:42,116 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 124 selfloop transitions, 58 changer transitions 47/236 dead transitions. [2022-12-13 22:25:42,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 236 transitions, 2952 flow [2022-12-13 22:25:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 436 transitions. [2022-12-13 22:25:42,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2022-12-13 22:25:42,118 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 436 transitions. [2022-12-13 22:25:42,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 436 transitions. [2022-12-13 22:25:42,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:42,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 436 transitions. [2022-12-13 22:25:42,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:42,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:42,120 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 172.0) internal successors, (1032), 6 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:42,120 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1298 flow. Second operand 5 states and 436 transitions. [2022-12-13 22:25:42,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 236 transitions, 2952 flow [2022-12-13 22:25:42,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 236 transitions, 2778 flow, removed 68 selfloop flow, removed 3 redundant places. [2022-12-13 22:25:42,144 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1954 flow [2022-12-13 22:25:42,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1954, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2022-12-13 22:25:42,144 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2022-12-13 22:25:42,144 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1954 flow [2022-12-13 22:25:42,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:42,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:42,145 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:42,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:25:42,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:42,345 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)] === [2022-12-13 22:25:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:42,346 INFO L85 PathProgramCache]: Analyzing trace with hash -341189011, now seen corresponding path program 8 times [2022-12-13 22:25:42,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:42,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940710756] [2022-12-13 22:25:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:42,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:42,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940710756] [2022-12-13 22:25:42,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940710756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652700964] [2022-12-13 22:25:42,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:25:42,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:42,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:42,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:25:42,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:25:42,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:42,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:42,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:42,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652700964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:42,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:42,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 22:25:42,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033727123] [2022-12-13 22:25:42,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:42,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:25:42,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:25:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:25:42,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:42,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1954 flow. Second operand has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:42,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:42,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:42,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:43,224 INFO L130 PetriNetUnfolder]: 680/1466 cut-off events. [2022-12-13 22:25:43,224 INFO L131 PetriNetUnfolder]: For 12364/12364 co-relation queries the response was YES. [2022-12-13 22:25:43,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8580 conditions, 1466 events. 680/1466 cut-off events. For 12364/12364 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9562 event pairs, 27 based on Foata normal form. 24/1490 useless extension candidates. Maximal degree in co-relation 8537. Up to 331 conditions per place. [2022-12-13 22:25:43,245 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 152 selfloop transitions, 156 changer transitions 21/329 dead transitions. [2022-12-13 22:25:43,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 329 transitions, 4269 flow [2022-12-13 22:25:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 22:25:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 22:25:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2451 transitions. [2022-12-13 22:25:43,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2022-12-13 22:25:43,247 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2451 transitions. [2022-12-13 22:25:43,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2451 transitions. [2022-12-13 22:25:43,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:43,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2451 transitions. [2022-12-13 22:25:43,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 74.27272727272727) internal successors, (2451), 33 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:43,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 172.0) internal successors, (5848), 34 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:43,255 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 172.0) internal successors, (5848), 34 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:43,255 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1954 flow. Second operand 33 states and 2451 transitions. [2022-12-13 22:25:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 329 transitions, 4269 flow [2022-12-13 22:25:43,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 329 transitions, 4101 flow, removed 62 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:43,292 INFO L231 Difference]: Finished difference. Result has 160 places, 224 transitions, 3493 flow [2022-12-13 22:25:43,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3493, PETRI_PLACES=160, PETRI_TRANSITIONS=224} [2022-12-13 22:25:43,292 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2022-12-13 22:25:43,292 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 224 transitions, 3493 flow [2022-12-13 22:25:43,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:43,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:43,293 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:43,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:25:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:43,494 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)] === [2022-12-13 22:25:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:43,495 INFO L85 PathProgramCache]: Analyzing trace with hash -675507763, now seen corresponding path program 9 times [2022-12-13 22:25:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572869570] [2022-12-13 22:25:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:43,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:43,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572869570] [2022-12-13 22:25:43,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572869570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:43,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041929208] [2022-12-13 22:25:43,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:25:43,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:43,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:43,608 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:43,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:25:43,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:25:43,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:43,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041929208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:43,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:43,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 22:25:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332062155] [2022-12-13 22:25:43,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:43,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 22:25:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 22:25:43,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:25:43,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:43,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 224 transitions, 3493 flow. Second operand has 14 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:43,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:43,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:43,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:44,301 INFO L130 PetriNetUnfolder]: 767/1617 cut-off events. [2022-12-13 22:25:44,301 INFO L131 PetriNetUnfolder]: For 23737/23737 co-relation queries the response was YES. [2022-12-13 22:25:44,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 1617 events. 767/1617 cut-off events. For 23737/23737 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10637 event pairs, 89 based on Foata normal form. 36/1653 useless extension candidates. Maximal degree in co-relation 11104. Up to 1257 conditions per place. [2022-12-13 22:25:44,326 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 239 selfloop transitions, 50 changer transitions 24/313 dead transitions. [2022-12-13 22:25:44,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 313 transitions, 5331 flow [2022-12-13 22:25:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:25:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 22:25:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2022-12-13 22:25:44,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43992248062015504 [2022-12-13 22:25:44,328 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2022-12-13 22:25:44,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2022-12-13 22:25:44,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:44,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2022-12-13 22:25:44,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:44,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:44,332 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:44,332 INFO L175 Difference]: Start difference. First operand has 160 places, 224 transitions, 3493 flow. Second operand 9 states and 681 transitions. [2022-12-13 22:25:44,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 313 transitions, 5331 flow [2022-12-13 22:25:44,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 313 transitions, 4345 flow, removed 418 selfloop flow, removed 12 redundant places. [2022-12-13 22:25:44,481 INFO L231 Difference]: Finished difference. Result has 158 places, 252 transitions, 3406 flow [2022-12-13 22:25:44,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3406, PETRI_PLACES=158, PETRI_TRANSITIONS=252} [2022-12-13 22:25:44,482 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2022-12-13 22:25:44,482 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 252 transitions, 3406 flow [2022-12-13 22:25:44,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:44,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:44,483 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:44,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 22:25:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:44,685 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)] === [2022-12-13 22:25:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1036268893, now seen corresponding path program 10 times [2022-12-13 22:25:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934401961] [2022-12-13 22:25:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:44,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934401961] [2022-12-13 22:25:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934401961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790425079] [2022-12-13 22:25:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:25:44,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:44,788 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:44,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:25:44,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:25:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:44,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:44,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:44,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790425079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:44,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:44,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-13 22:25:44,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025782937] [2022-12-13 22:25:44,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:44,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:25:44,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:25:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:25:44,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:44,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 252 transitions, 3406 flow. Second operand has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:44,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:44,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:44,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:45,530 INFO L130 PetriNetUnfolder]: 726/1512 cut-off events. [2022-12-13 22:25:45,530 INFO L131 PetriNetUnfolder]: For 20231/20231 co-relation queries the response was YES. [2022-12-13 22:25:45,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9688 conditions, 1512 events. 726/1512 cut-off events. For 20231/20231 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9691 event pairs, 47 based on Foata normal form. 82/1594 useless extension candidates. Maximal degree in co-relation 9632. Up to 582 conditions per place. [2022-12-13 22:25:45,539 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 175 selfloop transitions, 143 changer transitions 5/323 dead transitions. [2022-12-13 22:25:45,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 323 transitions, 4564 flow [2022-12-13 22:25:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 22:25:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 22:25:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1649 transitions. [2022-12-13 22:25:45,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4357822410147992 [2022-12-13 22:25:45,541 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1649 transitions. [2022-12-13 22:25:45,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1649 transitions. [2022-12-13 22:25:45,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:45,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1649 transitions. [2022-12-13 22:25:45,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 74.95454545454545) internal successors, (1649), 22 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 172.0) internal successors, (3956), 23 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,546 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 172.0) internal successors, (3956), 23 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,546 INFO L175 Difference]: Start difference. First operand has 158 places, 252 transitions, 3406 flow. Second operand 22 states and 1649 transitions. [2022-12-13 22:25:45,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 323 transitions, 4564 flow [2022-12-13 22:25:45,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 323 transitions, 4437 flow, removed 48 selfloop flow, removed 7 redundant places. [2022-12-13 22:25:45,631 INFO L231 Difference]: Finished difference. Result has 174 places, 248 transitions, 3694 flow [2022-12-13 22:25:45,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3694, PETRI_PLACES=174, PETRI_TRANSITIONS=248} [2022-12-13 22:25:45,631 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2022-12-13 22:25:45,631 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 248 transitions, 3694 flow [2022-12-13 22:25:45,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:45,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:45,632 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:45,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 22:25:45,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:45,833 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)] === [2022-12-13 22:25:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash 767233383, now seen corresponding path program 11 times [2022-12-13 22:25:45,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:45,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806553216] [2022-12-13 22:25:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:45,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:45,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806553216] [2022-12-13 22:25:45,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806553216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758740137] [2022-12-13 22:25:45,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:25:45,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:45,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:45,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:45,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 22:25:45,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 22:25:45,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:45,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:45,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:46,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758740137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:46,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:46,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 22:25:46,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854933948] [2022-12-13 22:25:46,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:46,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 22:25:46,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 22:25:46,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 22:25:46,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:46,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 248 transitions, 3694 flow. Second operand has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:46,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:46,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:46,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:46,944 INFO L130 PetriNetUnfolder]: 1225/2432 cut-off events. [2022-12-13 22:25:46,944 INFO L131 PetriNetUnfolder]: For 32907/32907 co-relation queries the response was YES. [2022-12-13 22:25:46,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16758 conditions, 2432 events. 1225/2432 cut-off events. For 32907/32907 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16708 event pairs, 81 based on Foata normal form. 78/2510 useless extension candidates. Maximal degree in co-relation 16702. Up to 1536 conditions per place. [2022-12-13 22:25:46,959 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 305 selfloop transitions, 194 changer transitions 5/504 dead transitions. [2022-12-13 22:25:46,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 504 transitions, 8194 flow [2022-12-13 22:25:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:25:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 22:25:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1508 transitions. [2022-12-13 22:25:46,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4383720930232558 [2022-12-13 22:25:46,962 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1508 transitions. [2022-12-13 22:25:46,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1508 transitions. [2022-12-13 22:25:46,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:46,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1508 transitions. [2022-12-13 22:25:46,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.4) internal successors, (1508), 20 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:46,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:46,968 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:46,968 INFO L175 Difference]: Start difference. First operand has 174 places, 248 transitions, 3694 flow. Second operand 20 states and 1508 transitions. [2022-12-13 22:25:46,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 504 transitions, 8194 flow [2022-12-13 22:25:47,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 504 transitions, 7883 flow, removed 65 selfloop flow, removed 12 redundant places. [2022-12-13 22:25:47,156 INFO L231 Difference]: Finished difference. Result has 191 places, 412 transitions, 7026 flow [2022-12-13 22:25:47,157 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7026, PETRI_PLACES=191, PETRI_TRANSITIONS=412} [2022-12-13 22:25:47,157 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2022-12-13 22:25:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 412 transitions, 7026 flow [2022-12-13 22:25:47,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:47,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:47,157 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:47,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 22:25:47,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:47,358 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:47,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1381437287, now seen corresponding path program 12 times [2022-12-13 22:25:47,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:47,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365485263] [2022-12-13 22:25:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365485263] [2022-12-13 22:25:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365485263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979614728] [2022-12-13 22:25:47,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:25:47,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:47,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:47,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 22:25:47,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 22:25:47,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:47,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:47,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979614728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:47,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:47,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-12-13 22:25:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177759598] [2022-12-13 22:25:47,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 22:25:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 22:25:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:25:47,681 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:47,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 412 transitions, 7026 flow. Second operand has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:47,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:47,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:47,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:48,593 INFO L130 PetriNetUnfolder]: 1552/3090 cut-off events. [2022-12-13 22:25:48,594 INFO L131 PetriNetUnfolder]: For 59831/59831 co-relation queries the response was YES. [2022-12-13 22:25:48,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23575 conditions, 3090 events. 1552/3090 cut-off events. For 59831/59831 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22205 event pairs, 79 based on Foata normal form. 74/3164 useless extension candidates. Maximal degree in co-relation 23508. Up to 1156 conditions per place. [2022-12-13 22:25:48,618 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 252 selfloop transitions, 356 changer transitions 8/616 dead transitions. [2022-12-13 22:25:48,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 616 transitions, 11074 flow [2022-12-13 22:25:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 22:25:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 22:25:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1575 transitions. [2022-12-13 22:25:48,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2022-12-13 22:25:48,621 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1575 transitions. [2022-12-13 22:25:48,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1575 transitions. [2022-12-13 22:25:48,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:48,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1575 transitions. [2022-12-13 22:25:48,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.0) internal successors, (1575), 21 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:48,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:48,627 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:48,627 INFO L175 Difference]: Start difference. First operand has 191 places, 412 transitions, 7026 flow. Second operand 21 states and 1575 transitions. [2022-12-13 22:25:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 616 transitions, 11074 flow [2022-12-13 22:25:49,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 616 transitions, 10500 flow, removed 271 selfloop flow, removed 4 redundant places. [2022-12-13 22:25:49,012 INFO L231 Difference]: Finished difference. Result has 215 places, 524 transitions, 9763 flow [2022-12-13 22:25:49,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9763, PETRI_PLACES=215, PETRI_TRANSITIONS=524} [2022-12-13 22:25:49,012 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 186 predicate places. [2022-12-13 22:25:49,012 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 524 transitions, 9763 flow [2022-12-13 22:25:49,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:49,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:49,013 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:49,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 22:25:49,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:49,214 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 59132017, now seen corresponding path program 13 times [2022-12-13 22:25:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:49,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606117045] [2022-12-13 22:25:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:49,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:49,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606117045] [2022-12-13 22:25:49,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606117045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210258715] [2022-12-13 22:25:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:25:49,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:49,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:49,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 22:25:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:49,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:49,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210258715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:49,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:49,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 22:25:49,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724234778] [2022-12-13 22:25:49,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:49,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 22:25:49,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 22:25:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-13 22:25:49,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:49,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 524 transitions, 9763 flow. Second operand has 20 states, 20 states have (on average 70.55) internal successors, (1411), 20 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:49,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:49,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:50,800 INFO L130 PetriNetUnfolder]: 1659/3295 cut-off events. [2022-12-13 22:25:50,800 INFO L131 PetriNetUnfolder]: For 85585/85585 co-relation queries the response was YES. [2022-12-13 22:25:50,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26987 conditions, 3295 events. 1659/3295 cut-off events. For 85585/85585 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23755 event pairs, 514 based on Foata normal form. 104/3399 useless extension candidates. Maximal degree in co-relation 26912. Up to 2515 conditions per place. [2022-12-13 22:25:50,835 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 517 selfloop transitions, 133 changer transitions 14/664 dead transitions. [2022-12-13 22:25:50,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 664 transitions, 12953 flow [2022-12-13 22:25:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 22:25:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 22:25:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1590 transitions. [2022-12-13 22:25:50,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44019933554817275 [2022-12-13 22:25:50,837 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1590 transitions. [2022-12-13 22:25:50,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1590 transitions. [2022-12-13 22:25:50,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:50,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1590 transitions. [2022-12-13 22:25:50,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.71428571428571) internal successors, (1590), 21 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:50,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:50,840 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 172.0) internal successors, (3784), 22 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:50,840 INFO L175 Difference]: Start difference. First operand has 215 places, 524 transitions, 9763 flow. Second operand 21 states and 1590 transitions. [2022-12-13 22:25:50,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 664 transitions, 12953 flow [2022-12-13 22:25:51,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 664 transitions, 12590 flow, removed 153 selfloop flow, removed 9 redundant places. [2022-12-13 22:25:51,417 INFO L231 Difference]: Finished difference. Result has 236 places, 575 transitions, 11174 flow [2022-12-13 22:25:51,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=9400, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11174, PETRI_PLACES=236, PETRI_TRANSITIONS=575} [2022-12-13 22:25:51,418 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2022-12-13 22:25:51,418 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 575 transitions, 11174 flow [2022-12-13 22:25:51,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.55) internal successors, (1411), 20 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:51,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:51,418 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:51,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 22:25:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 22:25:51,619 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1421947935, now seen corresponding path program 14 times [2022-12-13 22:25:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:51,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791719666] [2022-12-13 22:25:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:51,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791719666] [2022-12-13 22:25:51,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791719666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112551591] [2022-12-13 22:25:51,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:25:51,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:51,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:51,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 22:25:51,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:25:51,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:51,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:51,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:51,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112551591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:51,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:51,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-13 22:25:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047549977] [2022-12-13 22:25:51,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:51,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 22:25:51,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 22:25:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:25:51,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:51,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 575 transitions, 11174 flow. Second operand has 17 states, 17 states have (on average 70.76470588235294) internal successors, (1203), 17 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:51,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:51,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:53,212 INFO L130 PetriNetUnfolder]: 1694/3346 cut-off events. [2022-12-13 22:25:53,212 INFO L131 PetriNetUnfolder]: For 91366/91366 co-relation queries the response was YES. [2022-12-13 22:25:53,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28333 conditions, 3346 events. 1694/3346 cut-off events. For 91366/91366 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 24030 event pairs, 197 based on Foata normal form. 6/3352 useless extension candidates. Maximal degree in co-relation 28248. Up to 1080 conditions per place. [2022-12-13 22:25:53,237 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 356 selfloop transitions, 306 changer transitions 11/673 dead transitions. [2022-12-13 22:25:53,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 673 transitions, 13678 flow [2022-12-13 22:25:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 22:25:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 22:25:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1915 transitions. [2022-12-13 22:25:53,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4282200357781753 [2022-12-13 22:25:53,239 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1915 transitions. [2022-12-13 22:25:53,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1915 transitions. [2022-12-13 22:25:53,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:53,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1915 transitions. [2022-12-13 22:25:53,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.65384615384616) internal successors, (1915), 26 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:53,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:53,244 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:53,244 INFO L175 Difference]: Start difference. First operand has 236 places, 575 transitions, 11174 flow. Second operand 26 states and 1915 transitions. [2022-12-13 22:25:53,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 673 transitions, 13678 flow [2022-12-13 22:25:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 673 transitions, 12453 flow, removed 608 selfloop flow, removed 3 redundant places. [2022-12-13 22:25:54,064 INFO L231 Difference]: Finished difference. Result has 262 places, 608 transitions, 11368 flow [2022-12-13 22:25:54,065 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11368, PETRI_PLACES=262, PETRI_TRANSITIONS=608} [2022-12-13 22:25:54,065 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 233 predicate places. [2022-12-13 22:25:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 608 transitions, 11368 flow [2022-12-13 22:25:54,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.76470588235294) internal successors, (1203), 17 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:54,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:54,065 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:54,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 22:25:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 22:25:54,267 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 781769926, now seen corresponding path program 15 times [2022-12-13 22:25:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:54,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420685227] [2022-12-13 22:25:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:25:54,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420685227] [2022-12-13 22:25:54,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420685227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901156162] [2022-12-13 22:25:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:25:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:54,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:54,376 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 22:25:54,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:25:54,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 22:25:54,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:25:54,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:25:54,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901156162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:54,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:54,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-13 22:25:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474410215] [2022-12-13 22:25:54,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:25:54,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:25:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:25:54,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-12-13 22:25:54,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 608 transitions, 11368 flow. Second operand has 6 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:54,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:54,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-12-13 22:25:54,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:55,938 INFO L130 PetriNetUnfolder]: 2564/5008 cut-off events. [2022-12-13 22:25:55,938 INFO L131 PetriNetUnfolder]: For 123054/123064 co-relation queries the response was YES. [2022-12-13 22:25:55,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41823 conditions, 5008 events. 2564/5008 cut-off events. For 123054/123064 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 38666 event pairs, 215 based on Foata normal form. 35/5041 useless extension candidates. Maximal degree in co-relation 41733. Up to 2523 conditions per place. [2022-12-13 22:25:55,978 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 549 selfloop transitions, 338 changer transitions 121/1016 dead transitions. [2022-12-13 22:25:55,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1016 transitions, 20551 flow [2022-12-13 22:25:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:25:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:25:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 525 transitions. [2022-12-13 22:25:55,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5087209302325582 [2022-12-13 22:25:55,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 525 transitions. [2022-12-13 22:25:55,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 525 transitions. [2022-12-13 22:25:55,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:55,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 525 transitions. [2022-12-13 22:25:55,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.5) internal successors, (525), 6 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:55,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:55,981 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:55,981 INFO L175 Difference]: Start difference. First operand has 262 places, 608 transitions, 11368 flow. Second operand 6 states and 525 transitions. [2022-12-13 22:25:55,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1016 transitions, 20551 flow [2022-12-13 22:25:57,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1016 transitions, 20003 flow, removed 224 selfloop flow, removed 8 redundant places. [2022-12-13 22:25:57,093 INFO L231 Difference]: Finished difference. Result has 262 places, 812 transitions, 16529 flow [2022-12-13 22:25:57,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=11087, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16529, PETRI_PLACES=262, PETRI_TRANSITIONS=812} [2022-12-13 22:25:57,094 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 233 predicate places. [2022-12-13 22:25:57,094 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 812 transitions, 16529 flow [2022-12-13 22:25:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:57,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:57,095 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:57,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 22:25:57,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 22:25:57,296 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:25:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1622803845, now seen corresponding path program 16 times [2022-12-13 22:25:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:25:57,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849603918] [2022-12-13 22:25:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:57,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:25:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:57,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:25:57,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849603918] [2022-12-13 22:25:57,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849603918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:25:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769170897] [2022-12-13 22:25:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:25:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:25:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:25:57,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:25:57,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 22:25:57,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:25:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:25:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:25:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:57,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:25:57,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769170897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:57,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:25:57,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 22:25:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608519394] [2022-12-13 22:25:57,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 22:25:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:25:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 22:25:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:25:57,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:25:57,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 812 transitions, 16529 flow. Second operand has 17 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:57,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:57,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:25:57,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:59,490 INFO L130 PetriNetUnfolder]: 2851/5623 cut-off events. [2022-12-13 22:25:59,490 INFO L131 PetriNetUnfolder]: For 159758/159758 co-relation queries the response was YES. [2022-12-13 22:25:59,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49917 conditions, 5623 events. 2851/5623 cut-off events. For 159758/159758 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44594 event pairs, 239 based on Foata normal form. 50/5673 useless extension candidates. Maximal degree in co-relation 49823. Up to 4307 conditions per place. [2022-12-13 22:25:59,577 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 838 selfloop transitions, 201 changer transitions 51/1090 dead transitions. [2022-12-13 22:25:59,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1090 transitions, 23949 flow [2022-12-13 22:25:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 22:25:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 22:25:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 836 transitions. [2022-12-13 22:25:59,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2022-12-13 22:25:59,579 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 836 transitions. [2022-12-13 22:25:59,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 836 transitions. [2022-12-13 22:25:59,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:59,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 836 transitions. [2022-12-13 22:25:59,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 76.0) internal successors, (836), 11 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:59,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 172.0) internal successors, (2064), 12 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:59,584 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 172.0) internal successors, (2064), 12 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:59,584 INFO L175 Difference]: Start difference. First operand has 262 places, 812 transitions, 16529 flow. Second operand 11 states and 836 transitions. [2022-12-13 22:25:59,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1090 transitions, 23949 flow [2022-12-13 22:26:01,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1090 transitions, 23451 flow, removed 249 selfloop flow, removed 0 redundant places. [2022-12-13 22:26:01,190 INFO L231 Difference]: Finished difference. Result has 278 places, 946 transitions, 20179 flow [2022-12-13 22:26:01,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=16093, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20179, PETRI_PLACES=278, PETRI_TRANSITIONS=946} [2022-12-13 22:26:01,191 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2022-12-13 22:26:01,191 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 946 transitions, 20179 flow [2022-12-13 22:26:01,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:01,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:01,191 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:01,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 22:26:01,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:01,392 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 257735037, now seen corresponding path program 17 times [2022-12-13 22:26:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:01,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628359342] [2022-12-13 22:26:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:01,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:01,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628359342] [2022-12-13 22:26:01,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628359342] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:01,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413343389] [2022-12-13 22:26:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:26:01,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:01,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:01,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:01,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 22:26:01,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 22:26:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:01,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:01,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413343389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:01,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:01,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-13 22:26:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996324572] [2022-12-13 22:26:01,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 22:26:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 22:26:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-12-13 22:26:01,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:01,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 946 transitions, 20179 flow. Second operand has 19 states, 19 states have (on average 70.63157894736842) internal successors, (1342), 19 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:01,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:01,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:01,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:04,285 INFO L130 PetriNetUnfolder]: 3297/6445 cut-off events. [2022-12-13 22:26:04,285 INFO L131 PetriNetUnfolder]: For 194395/194395 co-relation queries the response was YES. [2022-12-13 22:26:04,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58414 conditions, 6445 events. 3297/6445 cut-off events. For 194395/194395 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 51365 event pairs, 235 based on Foata normal form. 60/6505 useless extension candidates. Maximal degree in co-relation 58313. Up to 4774 conditions per place. [2022-12-13 22:26:04,349 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 887 selfloop transitions, 299 changer transitions 17/1203 dead transitions. [2022-12-13 22:26:04,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1203 transitions, 27293 flow [2022-12-13 22:26:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 22:26:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 22:26:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1280 transitions. [2022-12-13 22:26:04,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377564979480164 [2022-12-13 22:26:04,352 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1280 transitions. [2022-12-13 22:26:04,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1280 transitions. [2022-12-13 22:26:04,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:04,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1280 transitions. [2022-12-13 22:26:04,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 75.29411764705883) internal successors, (1280), 17 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:04,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:04,357 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 172.0) internal successors, (3096), 18 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:04,357 INFO L175 Difference]: Start difference. First operand has 278 places, 946 transitions, 20179 flow. Second operand 17 states and 1280 transitions. [2022-12-13 22:26:04,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1203 transitions, 27293 flow [2022-12-13 22:26:06,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 1203 transitions, 27078 flow, removed 90 selfloop flow, removed 4 redundant places. [2022-12-13 22:26:06,689 INFO L231 Difference]: Finished difference. Result has 295 places, 1070 transitions, 23891 flow [2022-12-13 22:26:06,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=20028, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23891, PETRI_PLACES=295, PETRI_TRANSITIONS=1070} [2022-12-13 22:26:06,690 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 266 predicate places. [2022-12-13 22:26:06,690 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 1070 transitions, 23891 flow [2022-12-13 22:26:06,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.63157894736842) internal successors, (1342), 19 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:06,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:06,690 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:06,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 22:26:06,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 22:26:06,891 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:06,891 INFO L85 PathProgramCache]: Analyzing trace with hash -150259535, now seen corresponding path program 18 times [2022-12-13 22:26:06,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:06,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100569736] [2022-12-13 22:26:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:06,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:06,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:06,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100569736] [2022-12-13 22:26:06,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100569736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:06,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740795050] [2022-12-13 22:26:06,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:26:06,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:06,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:06,976 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:06,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 22:26:07,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 22:26:07,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:07,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:07,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:07,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:07,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740795050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:07,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:07,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-12-13 22:26:07,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284485537] [2022-12-13 22:26:07,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:07,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 22:26:07,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 22:26:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-12-13 22:26:07,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:07,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 1070 transitions, 23891 flow. Second operand has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:07,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:07,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:07,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:10,866 INFO L130 PetriNetUnfolder]: 3791/7482 cut-off events. [2022-12-13 22:26:10,867 INFO L131 PetriNetUnfolder]: For 266385/266385 co-relation queries the response was YES. [2022-12-13 22:26:10,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71824 conditions, 7482 events. 3791/7482 cut-off events. For 266385/266385 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 61867 event pairs, 73 based on Foata normal form. 28/7510 useless extension candidates. Maximal degree in co-relation 71719. Up to 2068 conditions per place. [2022-12-13 22:26:10,944 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 334 selfloop transitions, 1041 changer transitions 45/1420 dead transitions. [2022-12-13 22:26:10,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1420 transitions, 32801 flow [2022-12-13 22:26:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 22:26:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 22:26:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3631 transitions. [2022-12-13 22:26:10,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43082581869957287 [2022-12-13 22:26:10,949 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3631 transitions. [2022-12-13 22:26:10,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3631 transitions. [2022-12-13 22:26:10,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:10,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3631 transitions. [2022-12-13 22:26:10,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 74.10204081632654) internal successors, (3631), 49 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:10,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 172.0) internal successors, (8600), 50 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:10,961 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 172.0) internal successors, (8600), 50 states have internal predecessors, (8600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:10,961 INFO L175 Difference]: Start difference. First operand has 295 places, 1070 transitions, 23891 flow. Second operand 49 states and 3631 transitions. [2022-12-13 22:26:10,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1420 transitions, 32801 flow [2022-12-13 22:26:13,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1420 transitions, 32441 flow, removed 154 selfloop flow, removed 5 redundant places. [2022-12-13 22:26:13,865 INFO L231 Difference]: Finished difference. Result has 347 places, 1252 transitions, 30940 flow [2022-12-13 22:26:13,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=23637, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=884, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=30940, PETRI_PLACES=347, PETRI_TRANSITIONS=1252} [2022-12-13 22:26:13,866 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 318 predicate places. [2022-12-13 22:26:13,866 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1252 transitions, 30940 flow [2022-12-13 22:26:13,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:13,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:13,867 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:13,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 22:26:14,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:14,068 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1959720783, now seen corresponding path program 19 times [2022-12-13 22:26:14,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:14,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213290610] [2022-12-13 22:26:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:14,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:14,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:14,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213290610] [2022-12-13 22:26:14,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213290610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:14,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403976709] [2022-12-13 22:26:14,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:26:14,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:14,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:14,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 22:26:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:14,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:14,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403976709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:14,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:14,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-12-13 22:26:14,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844651017] [2022-12-13 22:26:14,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:14,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 22:26:14,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 22:26:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-12-13 22:26:14,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:14,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1252 transitions, 30940 flow. Second operand has 18 states, 18 states have (on average 70.83333333333333) internal successors, (1275), 18 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:14,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:14,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:14,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:18,399 INFO L130 PetriNetUnfolder]: 4042/7877 cut-off events. [2022-12-13 22:26:18,399 INFO L131 PetriNetUnfolder]: For 367098/367098 co-relation queries the response was YES. [2022-12-13 22:26:18,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81536 conditions, 7877 events. 4042/7877 cut-off events. For 367098/367098 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 65038 event pairs, 201 based on Foata normal form. 206/8083 useless extension candidates. Maximal degree in co-relation 81422. Up to 3462 conditions per place. [2022-12-13 22:26:18,491 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 717 selfloop transitions, 764 changer transitions 16/1497 dead transitions. [2022-12-13 22:26:18,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1497 transitions, 38433 flow [2022-12-13 22:26:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 22:26:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 22:26:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2244 transitions. [2022-12-13 22:26:18,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2022-12-13 22:26:18,495 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2244 transitions. [2022-12-13 22:26:18,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2244 transitions. [2022-12-13 22:26:18,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:18,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2244 transitions. [2022-12-13 22:26:18,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 74.8) internal successors, (2244), 30 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:18,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 172.0) internal successors, (5332), 31 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:18,502 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 172.0) internal successors, (5332), 31 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:18,502 INFO L175 Difference]: Start difference. First operand has 347 places, 1252 transitions, 30940 flow. Second operand 30 states and 2244 transitions. [2022-12-13 22:26:18,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1497 transitions, 38433 flow [2022-12-13 22:26:23,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1497 transitions, 34688 flow, removed 1450 selfloop flow, removed 17 redundant places. [2022-12-13 22:26:23,816 INFO L231 Difference]: Finished difference. Result has 363 places, 1357 transitions, 32872 flow [2022-12-13 22:26:23,816 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=27631, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=657, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=32872, PETRI_PLACES=363, PETRI_TRANSITIONS=1357} [2022-12-13 22:26:23,817 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 334 predicate places. [2022-12-13 22:26:23,817 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1357 transitions, 32872 flow [2022-12-13 22:26:23,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.83333333333333) internal successors, (1275), 18 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:23,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:23,817 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:23,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 22:26:24,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 22:26:24,018 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1893299767, now seen corresponding path program 20 times [2022-12-13 22:26:24,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:24,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536976174] [2022-12-13 22:26:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:24,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536976174] [2022-12-13 22:26:24,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536976174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:24,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615021610] [2022-12-13 22:26:24,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:26:24,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:24,094 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:24,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 22:26:24,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:26:24,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:24,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615021610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:24,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:24,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-12-13 22:26:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174714709] [2022-12-13 22:26:24,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:24,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 22:26:24,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:24,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 22:26:24,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-12-13 22:26:24,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:24,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1357 transitions, 32872 flow. Second operand has 18 states, 18 states have (on average 70.83333333333333) internal successors, (1275), 18 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:24,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:24,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:24,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:28,628 INFO L130 PetriNetUnfolder]: 3995/7788 cut-off events. [2022-12-13 22:26:28,628 INFO L131 PetriNetUnfolder]: For 316900/316900 co-relation queries the response was YES. [2022-12-13 22:26:28,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78907 conditions, 7788 events. 3995/7788 cut-off events. For 316900/316900 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 64140 event pairs, 117 based on Foata normal form. 60/7848 useless extension candidates. Maximal degree in co-relation 78790. Up to 2226 conditions per place. [2022-12-13 22:26:28,703 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 452 selfloop transitions, 1017 changer transitions 1/1470 dead transitions. [2022-12-13 22:26:28,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1470 transitions, 36873 flow [2022-12-13 22:26:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 22:26:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 22:26:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2610 transitions. [2022-12-13 22:26:28,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4335548172757475 [2022-12-13 22:26:28,706 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2610 transitions. [2022-12-13 22:26:28,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2610 transitions. [2022-12-13 22:26:28,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:28,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2610 transitions. [2022-12-13 22:26:28,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 74.57142857142857) internal successors, (2610), 35 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:28,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:28,711 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 172.0) internal successors, (6192), 36 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:28,711 INFO L175 Difference]: Start difference. First operand has 363 places, 1357 transitions, 32872 flow. Second operand 35 states and 2610 transitions. [2022-12-13 22:26:28,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1470 transitions, 36873 flow [2022-12-13 22:26:33,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1470 transitions, 36059 flow, removed 202 selfloop flow, removed 15 redundant places. [2022-12-13 22:26:33,510 INFO L231 Difference]: Finished difference. Result has 383 places, 1358 transitions, 34750 flow [2022-12-13 22:26:33,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=31918, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=34750, PETRI_PLACES=383, PETRI_TRANSITIONS=1358} [2022-12-13 22:26:33,511 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 354 predicate places. [2022-12-13 22:26:33,511 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1358 transitions, 34750 flow [2022-12-13 22:26:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.83333333333333) internal successors, (1275), 18 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:33,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:33,511 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:33,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 22:26:33,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 22:26:33,713 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:33,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1556641785, now seen corresponding path program 21 times [2022-12-13 22:26:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:33,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114370564] [2022-12-13 22:26:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:33,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:33,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114370564] [2022-12-13 22:26:33,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114370564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:33,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24437234] [2022-12-13 22:26:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:26:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:33,793 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:33,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 22:26:33,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 22:26:33,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:33,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:26:33,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24437234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:33,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:33,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-12-13 22:26:33,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663006928] [2022-12-13 22:26:33,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:33,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 22:26:33,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 22:26:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-13 22:26:34,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:34,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1358 transitions, 34750 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:34,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:34,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:34,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:38,801 INFO L130 PetriNetUnfolder]: 4514/8757 cut-off events. [2022-12-13 22:26:38,801 INFO L131 PetriNetUnfolder]: For 369892/369892 co-relation queries the response was YES. [2022-12-13 22:26:38,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91698 conditions, 8757 events. 4514/8757 cut-off events. For 369892/369892 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 73532 event pairs, 309 based on Foata normal form. 66/8823 useless extension candidates. Maximal degree in co-relation 91580. Up to 6363 conditions per place. [2022-12-13 22:26:38,905 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 1187 selfloop transitions, 450 changer transitions 11/1648 dead transitions. [2022-12-13 22:26:38,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1648 transitions, 44395 flow [2022-12-13 22:26:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:26:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 22:26:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1502 transitions. [2022-12-13 22:26:38,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4366279069767442 [2022-12-13 22:26:38,907 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1502 transitions. [2022-12-13 22:26:38,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1502 transitions. [2022-12-13 22:26:38,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:38,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1502 transitions. [2022-12-13 22:26:38,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.1) internal successors, (1502), 20 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:38,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:38,912 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:38,912 INFO L175 Difference]: Start difference. First operand has 383 places, 1358 transitions, 34750 flow. Second operand 20 states and 1502 transitions. [2022-12-13 22:26:38,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1648 transitions, 44395 flow [2022-12-13 22:26:45,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1648 transitions, 43170 flow, removed 95 selfloop flow, removed 24 redundant places. [2022-12-13 22:26:45,075 INFO L231 Difference]: Finished difference. Result has 384 places, 1492 transitions, 39034 flow [2022-12-13 22:26:45,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=33683, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=39034, PETRI_PLACES=384, PETRI_TRANSITIONS=1492} [2022-12-13 22:26:45,076 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 355 predicate places. [2022-12-13 22:26:45,076 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 1492 transitions, 39034 flow [2022-12-13 22:26:45,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:45,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:45,077 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:45,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 22:26:45,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:45,277 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2036529469, now seen corresponding path program 22 times [2022-12-13 22:26:45,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:45,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522539139] [2022-12-13 22:26:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:45,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:45,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:45,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522539139] [2022-12-13 22:26:45,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522539139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872103004] [2022-12-13 22:26:45,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:26:45,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:45,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:45,375 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:45,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 22:26:45,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:26:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:45,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:45,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872103004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:45,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:45,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-12-13 22:26:45,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928280152] [2022-12-13 22:26:45,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:45,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 22:26:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 22:26:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-12-13 22:26:45,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:45,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1492 transitions, 39034 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:45,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:45,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:45,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:50,778 INFO L130 PetriNetUnfolder]: 4900/9503 cut-off events. [2022-12-13 22:26:50,778 INFO L131 PetriNetUnfolder]: For 438495/438495 co-relation queries the response was YES. [2022-12-13 22:26:50,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99854 conditions, 9503 events. 4900/9503 cut-off events. For 438495/438495 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 81021 event pairs, 119 based on Foata normal form. 188/9691 useless extension candidates. Maximal degree in co-relation 99730. Up to 2728 conditions per place. [2022-12-13 22:26:50,870 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 560 selfloop transitions, 1221 changer transitions 20/1801 dead transitions. [2022-12-13 22:26:50,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1801 transitions, 48631 flow [2022-12-13 22:26:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 22:26:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 22:26:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2017 transitions. [2022-12-13 22:26:50,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4343238587424634 [2022-12-13 22:26:50,872 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2017 transitions. [2022-12-13 22:26:50,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2017 transitions. [2022-12-13 22:26:50,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:50,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2017 transitions. [2022-12-13 22:26:50,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 74.70370370370371) internal successors, (2017), 27 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:50,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 172.0) internal successors, (4816), 28 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:50,876 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 172.0) internal successors, (4816), 28 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:50,876 INFO L175 Difference]: Start difference. First operand has 384 places, 1492 transitions, 39034 flow. Second operand 27 states and 2017 transitions. [2022-12-13 22:26:50,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1801 transitions, 48631 flow [2022-12-13 22:26:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1801 transitions, 47479 flow, removed 140 selfloop flow, removed 10 redundant places. [2022-12-13 22:26:57,985 INFO L231 Difference]: Finished difference. Result has 405 places, 1637 transitions, 45999 flow [2022-12-13 22:26:57,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=37937, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=45999, PETRI_PLACES=405, PETRI_TRANSITIONS=1637} [2022-12-13 22:26:57,986 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 376 predicate places. [2022-12-13 22:26:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1637 transitions, 45999 flow [2022-12-13 22:26:57,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:57,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:57,986 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:57,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 22:26:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 22:26:58,187 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:26:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1103767049, now seen corresponding path program 23 times [2022-12-13 22:26:58,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:26:58,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096374711] [2022-12-13 22:26:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:58,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:26:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:58,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:26:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096374711] [2022-12-13 22:26:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096374711] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:26:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617828403] [2022-12-13 22:26:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:26:58,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:26:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:26:58,272 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:26:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 22:26:58,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 22:26:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:26:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:26:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:58,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:26:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617828403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:58,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:26:58,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-12-13 22:26:58,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972535870] [2022-12-13 22:26:58,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:58,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 22:26:58,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:26:58,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 22:26:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-13 22:26:58,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:26:58,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1637 transitions, 45999 flow. Second operand has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:58,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:58,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:26:58,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:27:06,728 INFO L130 PetriNetUnfolder]: 7254/13908 cut-off events. [2022-12-13 22:27:06,728 INFO L131 PetriNetUnfolder]: For 692930/692930 co-relation queries the response was YES. [2022-12-13 22:27:06,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156841 conditions, 13908 events. 7254/13908 cut-off events. For 692930/692930 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 123302 event pairs, 203 based on Foata normal form. 256/14164 useless extension candidates. Maximal degree in co-relation 156714. Up to 4160 conditions per place. [2022-12-13 22:27:06,878 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 797 selfloop transitions, 1776 changer transitions 40/2613 dead transitions. [2022-12-13 22:27:06,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 2613 transitions, 76993 flow [2022-12-13 22:27:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 22:27:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 22:27:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2324 transitions. [2022-12-13 22:27:06,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358589647411853 [2022-12-13 22:27:06,880 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2324 transitions. [2022-12-13 22:27:06,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2324 transitions. [2022-12-13 22:27:06,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:27:06,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2324 transitions. [2022-12-13 22:27:06,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 74.96774193548387) internal successors, (2324), 31 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:06,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:06,885 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 172.0) internal successors, (5504), 32 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:06,885 INFO L175 Difference]: Start difference. First operand has 405 places, 1637 transitions, 45999 flow. Second operand 31 states and 2324 transitions. [2022-12-13 22:27:06,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 2613 transitions, 76993 flow [2022-12-13 22:27:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2613 transitions, 76142 flow, removed 308 selfloop flow, removed 15 redundant places. [2022-12-13 22:27:20,460 INFO L231 Difference]: Finished difference. Result has 432 places, 2388 transitions, 74411 flow [2022-12-13 22:27:20,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=45449, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=74411, PETRI_PLACES=432, PETRI_TRANSITIONS=2388} [2022-12-13 22:27:20,461 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 403 predicate places. [2022-12-13 22:27:20,461 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 2388 transitions, 74411 flow [2022-12-13 22:27:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:20,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:20,462 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:20,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 22:27:20,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 22:27:20,663 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:27:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash -434802557, now seen corresponding path program 24 times [2022-12-13 22:27:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:27:20,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915610137] [2022-12-13 22:27:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:27:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:20,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:27:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915610137] [2022-12-13 22:27:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915610137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:27:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703769442] [2022-12-13 22:27:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:27:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:27:20,748 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:27:20,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 22:27:20,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 22:27:20,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:27:20,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:27:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:20,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:20,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703769442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:20,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:27:20,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2022-12-13 22:27:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108396112] [2022-12-13 22:27:20,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:27:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:27:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:27:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:27:21,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:27:21,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 2388 transitions, 74411 flow. Second operand has 21 states, 21 states have (on average 70.66666666666667) internal successors, (1484), 21 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:21,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:27:21,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:27:21,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:27:32,192 INFO L130 PetriNetUnfolder]: 7488/14408 cut-off events. [2022-12-13 22:27:32,192 INFO L131 PetriNetUnfolder]: For 736528/736528 co-relation queries the response was YES. [2022-12-13 22:27:32,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174391 conditions, 14408 events. 7488/14408 cut-off events. For 736528/736528 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 128651 event pairs, 886 based on Foata normal form. 32/14440 useless extension candidates. Maximal degree in co-relation 174254. Up to 4837 conditions per place. [2022-12-13 22:27:32,378 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 1561 selfloop transitions, 1060 changer transitions 13/2634 dead transitions. [2022-12-13 22:27:32,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 2634 transitions, 83971 flow [2022-12-13 22:27:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 22:27:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 22:27:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2970 transitions. [2022-12-13 22:27:32,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4316860465116279 [2022-12-13 22:27:32,381 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2970 transitions. [2022-12-13 22:27:32,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2970 transitions. [2022-12-13 22:27:32,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:27:32,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2970 transitions. [2022-12-13 22:27:32,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 74.25) internal successors, (2970), 40 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:32,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 172.0) internal successors, (7052), 41 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:32,386 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 172.0) internal successors, (7052), 41 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:32,386 INFO L175 Difference]: Start difference. First operand has 432 places, 2388 transitions, 74411 flow. Second operand 40 states and 2970 transitions. [2022-12-13 22:27:32,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 2634 transitions, 83971 flow [2022-12-13 22:27:50,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 2634 transitions, 82488 flow, removed 636 selfloop flow, removed 12 redundant places. [2022-12-13 22:27:50,705 INFO L231 Difference]: Finished difference. Result has 465 places, 2513 transitions, 78353 flow [2022-12-13 22:27:50,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=72928, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=951, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=78353, PETRI_PLACES=465, PETRI_TRANSITIONS=2513} [2022-12-13 22:27:50,706 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 436 predicate places. [2022-12-13 22:27:50,706 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 2513 transitions, 78353 flow [2022-12-13 22:27:50,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.66666666666667) internal successors, (1484), 21 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:50,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:50,707 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:50,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 22:27:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:50,908 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:27:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2117124507, now seen corresponding path program 25 times [2022-12-13 22:27:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:27:50,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420880903] [2022-12-13 22:27:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:50,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:27:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:27:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420880903] [2022-12-13 22:27:50,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420880903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:27:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836023318] [2022-12-13 22:27:50,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:27:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:27:50,982 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:27:50,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 22:27:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:27:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 22:27:51,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:27:51,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:27:51,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836023318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:51,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:27:51,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2022-12-13 22:27:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558479610] [2022-12-13 22:27:51,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:51,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:27:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:27:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:27:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:27:51,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:27:51,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 2513 transitions, 78353 flow. Second operand has 21 states, 21 states have (on average 70.80952380952381) internal successors, (1487), 21 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:51,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:27:51,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:27:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:28:03,397 INFO L130 PetriNetUnfolder]: 7438/14228 cut-off events. [2022-12-13 22:28:03,397 INFO L131 PetriNetUnfolder]: For 810503/810503 co-relation queries the response was YES. [2022-12-13 22:28:03,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174505 conditions, 14228 events. 7438/14228 cut-off events. For 810503/810503 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 126056 event pairs, 2515 based on Foata normal form. 106/14334 useless extension candidates. Maximal degree in co-relation 174362. Up to 12370 conditions per place. [2022-12-13 22:28:03,569 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 2271 selfloop transitions, 321 changer transitions 20/2612 dead transitions. [2022-12-13 22:28:03,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2612 transitions, 84362 flow [2022-12-13 22:28:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 22:28:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 22:28:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1961 transitions. [2022-12-13 22:28:03,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4385062611806798 [2022-12-13 22:28:03,571 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1961 transitions. [2022-12-13 22:28:03,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1961 transitions. [2022-12-13 22:28:03,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:28:03,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1961 transitions. [2022-12-13 22:28:03,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 75.42307692307692) internal successors, (1961), 26 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:03,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:03,574 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 172.0) internal successors, (4644), 27 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:03,575 INFO L175 Difference]: Start difference. First operand has 465 places, 2513 transitions, 78353 flow. Second operand 26 states and 1961 transitions. [2022-12-13 22:28:03,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2612 transitions, 84362 flow [2022-12-13 22:28:21,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 2612 transitions, 81874 flow, removed 638 selfloop flow, removed 17 redundant places. [2022-12-13 22:28:22,022 INFO L231 Difference]: Finished difference. Result has 474 places, 2512 transitions, 76393 flow [2022-12-13 22:28:22,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=75304, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=76393, PETRI_PLACES=474, PETRI_TRANSITIONS=2512} [2022-12-13 22:28:22,024 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 445 predicate places. [2022-12-13 22:28:22,024 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 2512 transitions, 76393 flow [2022-12-13 22:28:22,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.80952380952381) internal successors, (1487), 21 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:22,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:28:22,024 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:22,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 22:28:22,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:22,225 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:28:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1061549974, now seen corresponding path program 26 times [2022-12-13 22:28:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:28:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270904706] [2022-12-13 22:28:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:28:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:28:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:28:22,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:22,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270904706] [2022-12-13 22:28:22,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270904706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:22,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115421459] [2022-12-13 22:28:22,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:28:22,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:22,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:22,340 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:28:22,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 22:28:22,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:28:22,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:28:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 22:28:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:28:22,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:28:22,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115421459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:28:22,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:28:22,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-13 22:28:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408654526] [2022-12-13 22:28:22,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:22,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:28:22,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:28:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:28:22,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 172 [2022-12-13 22:28:22,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 2512 transitions, 76393 flow. Second operand has 7 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:22,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:28:22,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 172 [2022-12-13 22:28:22,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:28:37,912 INFO L130 PetriNetUnfolder]: 10497/20022 cut-off events. [2022-12-13 22:28:37,913 INFO L131 PetriNetUnfolder]: For 1080067/1080077 co-relation queries the response was YES. [2022-12-13 22:28:38,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243538 conditions, 20022 events. 10497/20022 cut-off events. For 1080067/1080077 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 186507 event pairs, 736 based on Foata normal form. 40/20056 useless extension candidates. Maximal degree in co-relation 243397. Up to 10343 conditions per place. [2022-12-13 22:28:38,178 INFO L137 encePairwiseOnDemand]: 168/172 looper letters, 1987 selfloop transitions, 1615 changer transitions 141/3752 dead transitions. [2022-12-13 22:28:38,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 3752 transitions, 117685 flow [2022-12-13 22:28:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:28:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 22:28:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 614 transitions. [2022-12-13 22:28:38,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5099667774086378 [2022-12-13 22:28:38,179 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 614 transitions. [2022-12-13 22:28:38,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 614 transitions. [2022-12-13 22:28:38,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:28:38,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 614 transitions. [2022-12-13 22:28:38,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:38,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:38,180 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:38,180 INFO L175 Difference]: Start difference. First operand has 474 places, 2512 transitions, 76393 flow. Second operand 7 states and 614 transitions. [2022-12-13 22:28:38,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 3752 transitions, 117685 flow [2022-12-13 22:29:05,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 3752 transitions, 116635 flow, removed 283 selfloop flow, removed 14 redundant places. [2022-12-13 22:29:05,550 INFO L231 Difference]: Finished difference. Result has 470 places, 3406 transitions, 109958 flow [2022-12-13 22:29:05,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=75737, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=109958, PETRI_PLACES=470, PETRI_TRANSITIONS=3406} [2022-12-13 22:29:05,552 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 441 predicate places. [2022-12-13 22:29:05,552 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 3406 transitions, 109958 flow [2022-12-13 22:29:05,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:05,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:05,552 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:05,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 22:29:05,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 22:29:05,753 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:29:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1467460319, now seen corresponding path program 27 times [2022-12-13 22:29:05,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:29:05,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182475836] [2022-12-13 22:29:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:05,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:29:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:05,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:29:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182475836] [2022-12-13 22:29:05,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182475836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:29:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865798757] [2022-12-13 22:29:05,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:29:05,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:29:05,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:29:05,879 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:29:05,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 22:29:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 22:29:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:29:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:29:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:29:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:05,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:29:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:29:06,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865798757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:29:06,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:29:06,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-13 22:29:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863277184] [2022-12-13 22:29:06,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:29:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 22:29:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:29:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 22:29:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-12-13 22:29:06,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:29:06,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 3406 transitions, 109958 flow. Second operand has 20 states, 20 states have (on average 70.6) internal successors, (1412), 20 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:06,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:06,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:29:06,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:30,060 INFO L130 PetriNetUnfolder]: 12341/23484 cut-off events. [2022-12-13 22:29:30,060 INFO L131 PetriNetUnfolder]: For 1341463/1341463 co-relation queries the response was YES. [2022-12-13 22:29:30,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299682 conditions, 23484 events. 12341/23484 cut-off events. For 1341463/1341463 co-relation queries the response was YES. Maximal size of possible extension queue 1789. Compared 222616 event pairs, 1083 based on Foata normal form. 84/23566 useless extension candidates. Maximal degree in co-relation 299537. Up to 19323 conditions per place. [2022-12-13 22:29:30,426 INFO L137 encePairwiseOnDemand]: 167/172 looper letters, 3490 selfloop transitions, 703 changer transitions 75/4268 dead transitions. [2022-12-13 22:29:30,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 4268 transitions, 145169 flow [2022-12-13 22:29:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 22:29:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 22:29:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 986 transitions. [2022-12-13 22:29:30,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409660107334526 [2022-12-13 22:29:30,428 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 986 transitions. [2022-12-13 22:29:30,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 986 transitions. [2022-12-13 22:29:30,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:30,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 986 transitions. [2022-12-13 22:29:30,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 75.84615384615384) internal successors, (986), 13 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:30,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:30,430 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 172.0) internal successors, (2408), 14 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:30,430 INFO L175 Difference]: Start difference. First operand has 470 places, 3406 transitions, 109958 flow. Second operand 13 states and 986 transitions. [2022-12-13 22:29:30,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 4268 transitions, 145169 flow [2022-12-13 22:30:09,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 4268 transitions, 143211 flow, removed 951 selfloop flow, removed 1 redundant places. [2022-12-13 22:30:10,054 INFO L231 Difference]: Finished difference. Result has 488 places, 3954 transitions, 131658 flow [2022-12-13 22:30:10,055 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=108027, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=131658, PETRI_PLACES=488, PETRI_TRANSITIONS=3954} [2022-12-13 22:30:10,055 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 459 predicate places. [2022-12-13 22:30:10,056 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 3954 transitions, 131658 flow [2022-12-13 22:30:10,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.6) internal successors, (1412), 20 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:10,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:10,056 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:10,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 22:30:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 22:30:10,257 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:30:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1867462643, now seen corresponding path program 28 times [2022-12-13 22:30:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:30:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305874332] [2022-12-13 22:30:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:30:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:30:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:30:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:30:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:30:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305874332] [2022-12-13 22:30:10,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305874332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:30:10,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040520852] [2022-12-13 22:30:10,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:30:10,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:30:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:30:10,337 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:30:10,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 22:30:10,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:30:10,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:30:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:30:10,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:30:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:30:10,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040520852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:30:10,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:30:10,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 22:30:10,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878901185] [2022-12-13 22:30:10,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:30:10,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:30:10,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:30:10,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:30:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:30:10,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:30:10,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 3954 transitions, 131658 flow. Second operand has 21 states, 21 states have (on average 70.57142857142857) internal successors, (1482), 21 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:10,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:10,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:30:10,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:43,763 INFO L130 PetriNetUnfolder]: 13722/26238 cut-off events. [2022-12-13 22:30:43,763 INFO L131 PetriNetUnfolder]: For 1648871/1648871 co-relation queries the response was YES. [2022-12-13 22:30:44,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341449 conditions, 26238 events. 13722/26238 cut-off events. For 1648871/1648871 co-relation queries the response was YES. Maximal size of possible extension queue 1974. Compared 253698 event pairs, 143 based on Foata normal form. 42/26278 useless extension candidates. Maximal degree in co-relation 341297. Up to 7976 conditions per place. [2022-12-13 22:30:44,196 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 628 selfloop transitions, 4039 changer transitions 61/4728 dead transitions. [2022-12-13 22:30:44,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 4728 transitions, 160666 flow [2022-12-13 22:30:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 22:30:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 22:30:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5027 transitions. [2022-12-13 22:30:44,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42980506155950754 [2022-12-13 22:30:44,201 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5027 transitions. [2022-12-13 22:30:44,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5027 transitions. [2022-12-13 22:30:44,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:44,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5027 transitions. [2022-12-13 22:30:44,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 73.92647058823529) internal successors, (5027), 68 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:44,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 172.0) internal successors, (11868), 69 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:44,216 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 172.0) internal successors, (11868), 69 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:44,216 INFO L175 Difference]: Start difference. First operand has 488 places, 3954 transitions, 131658 flow. Second operand 68 states and 5027 transitions. [2022-12-13 22:30:44,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 4728 transitions, 160666 flow [2022-12-13 22:31:36,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 4728 transitions, 160277 flow, removed 147 selfloop flow, removed 5 redundant places. [2022-12-13 22:31:36,261 INFO L231 Difference]: Finished difference. Result has 562 places, 4478 transitions, 159936 flow [2022-12-13 22:31:36,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=131343, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=159936, PETRI_PLACES=562, PETRI_TRANSITIONS=4478} [2022-12-13 22:31:36,263 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 533 predicate places. [2022-12-13 22:31:36,263 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 4478 transitions, 159936 flow [2022-12-13 22:31:36,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.57142857142857) internal successors, (1482), 21 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:36,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:31:36,263 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:31:36,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 22:31:36,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 22:31:36,465 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:31:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash 384340773, now seen corresponding path program 29 times [2022-12-13 22:31:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:31:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182045089] [2022-12-13 22:31:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:31:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:31:36,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:31:36,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182045089] [2022-12-13 22:31:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182045089] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:31:36,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124622427] [2022-12-13 22:31:36,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:31:36,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:31:36,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:31:36,592 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:31:36,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 22:31:36,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 22:31:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:31:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:31:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:31:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:31:36,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:31:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:31:36,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124622427] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:31:36,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:31:36,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-12-13 22:31:36,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642881710] [2022-12-13 22:31:36,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:31:36,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 22:31:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:31:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 22:31:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-12-13 22:31:36,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:31:36,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 4478 transitions, 159936 flow. Second operand has 22 states, 22 states have (on average 70.81818181818181) internal successors, (1558), 22 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:36,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:31:36,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:31:36,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:32:15,682 INFO L130 PetriNetUnfolder]: 14170/26866 cut-off events. [2022-12-13 22:32:15,682 INFO L131 PetriNetUnfolder]: For 2009664/2009664 co-relation queries the response was YES. [2022-12-13 22:32:16,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374794 conditions, 26866 events. 14170/26866 cut-off events. For 2009664/2009664 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 257913 event pairs, 1209 based on Foata normal form. 168/27032 useless extension candidates. Maximal degree in co-relation 374630. Up to 21562 conditions per place. [2022-12-13 22:32:16,172 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 3871 selfloop transitions, 970 changer transitions 3/4844 dead transitions. [2022-12-13 22:32:16,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 4844 transitions, 179900 flow [2022-12-13 22:32:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:32:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 22:32:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1500 transitions. [2022-12-13 22:32:16,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2022-12-13 22:32:16,174 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1500 transitions. [2022-12-13 22:32:16,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1500 transitions. [2022-12-13 22:32:16,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:32:16,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1500 transitions. [2022-12-13 22:32:16,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.0) internal successors, (1500), 20 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:16,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:16,177 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 172.0) internal successors, (3612), 21 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:16,177 INFO L175 Difference]: Start difference. First operand has 562 places, 4478 transitions, 159936 flow. Second operand 20 states and 1500 transitions. [2022-12-13 22:32:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 4844 transitions, 179900 flow [2022-12-13 22:33:33,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 4844 transitions, 170976 flow, removed 3359 selfloop flow, removed 19 redundant places. [2022-12-13 22:33:33,385 INFO L231 Difference]: Finished difference. Result has 560 places, 4634 transitions, 160441 flow [2022-12-13 22:33:33,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=151877, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=810, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=160441, PETRI_PLACES=560, PETRI_TRANSITIONS=4634} [2022-12-13 22:33:33,389 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 531 predicate places. [2022-12-13 22:33:33,389 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 4634 transitions, 160441 flow [2022-12-13 22:33:33,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 70.81818181818181) internal successors, (1558), 22 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:33:33,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:33:33,390 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:33:33,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 22:33:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:33:33,591 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:33:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:33:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1034363021, now seen corresponding path program 30 times [2022-12-13 22:33:33,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:33:33,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297806592] [2022-12-13 22:33:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:33:33,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:33:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:33:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:33:33,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:33:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297806592] [2022-12-13 22:33:33,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297806592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:33:33,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842859275] [2022-12-13 22:33:33,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:33:33,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:33:33,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:33:33,714 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:33:33,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 22:33:33,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 22:33:33,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:33:33,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:33:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:33:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:33:33,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:33:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:33:33,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842859275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:33:33,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:33:33,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 22:33:33,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268826632] [2022-12-13 22:33:33,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:33:33,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:33:33,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:33:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:33:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:33:33,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:33:33,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 4634 transitions, 160441 flow. Second operand has 21 states, 21 states have (on average 70.71428571428571) internal successors, (1485), 21 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:33:33,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:33:33,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:33:33,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:34:16,963 INFO L130 PetriNetUnfolder]: 15296/28909 cut-off events. [2022-12-13 22:34:16,963 INFO L131 PetriNetUnfolder]: For 1925615/1925615 co-relation queries the response was YES. [2022-12-13 22:34:17,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393361 conditions, 28909 events. 15296/28909 cut-off events. For 1925615/1925615 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 279485 event pairs, 959 based on Foata normal form. 118/29025 useless extension candidates. Maximal degree in co-relation 393198. Up to 18588 conditions per place. [2022-12-13 22:34:17,494 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 3386 selfloop transitions, 1784 changer transitions 36/5206 dead transitions. [2022-12-13 22:34:17,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 5206 transitions, 188405 flow [2022-12-13 22:34:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 22:34:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 22:34:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2026 transitions. [2022-12-13 22:34:17,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362618432385874 [2022-12-13 22:34:17,496 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2026 transitions. [2022-12-13 22:34:17,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2026 transitions. [2022-12-13 22:34:17,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:34:17,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2026 transitions. [2022-12-13 22:34:17,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 75.03703703703704) internal successors, (2026), 27 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:34:17,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 172.0) internal successors, (4816), 28 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:34:17,500 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 172.0) internal successors, (4816), 28 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:34:17,500 INFO L175 Difference]: Start difference. First operand has 560 places, 4634 transitions, 160441 flow. Second operand 27 states and 2026 transitions. [2022-12-13 22:34:17,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 5206 transitions, 188405 flow [2022-12-13 22:35:35,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 5206 transitions, 186606 flow, removed 585 selfloop flow, removed 7 redundant places. [2022-12-13 22:35:35,785 INFO L231 Difference]: Finished difference. Result has 586 places, 4910 transitions, 176220 flow [2022-12-13 22:35:35,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=158958, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=176220, PETRI_PLACES=586, PETRI_TRANSITIONS=4910} [2022-12-13 22:35:35,787 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 557 predicate places. [2022-12-13 22:35:35,787 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 4910 transitions, 176220 flow [2022-12-13 22:35:35,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.71428571428571) internal successors, (1485), 21 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:35:35,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:35:35,787 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:35:35,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 22:35:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:35:35,989 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:35:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:35:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1441008091, now seen corresponding path program 31 times [2022-12-13 22:35:35,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:35:35,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547486551] [2022-12-13 22:35:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:35:35,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:35:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:35:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:35:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:35:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547486551] [2022-12-13 22:35:36,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547486551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:35:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473003457] [2022-12-13 22:35:36,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:35:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:35:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:35:36,081 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:35:36,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 22:35:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:35:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:35:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:35:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:35:36,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:35:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:35:36,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473003457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:35:36,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:35:36,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 22:35:36,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686706380] [2022-12-13 22:35:36,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:35:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:35:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:35:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:35:36,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:35:36,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:35:36,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 4910 transitions, 176220 flow. Second operand has 21 states, 21 states have (on average 70.71428571428571) internal successors, (1485), 21 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:35:36,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:35:36,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:35:36,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:36:26,376 INFO L130 PetriNetUnfolder]: 16042/30333 cut-off events. [2022-12-13 22:36:26,376 INFO L131 PetriNetUnfolder]: For 2188820/2188820 co-relation queries the response was YES. [2022-12-13 22:36:26,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417588 conditions, 30333 events. 16042/30333 cut-off events. For 2188820/2188820 co-relation queries the response was YES. Maximal size of possible extension queue 2220. Compared 295467 event pairs, 805 based on Foata normal form. 168/30499 useless extension candidates. Maximal degree in co-relation 417418. Up to 15500 conditions per place. [2022-12-13 22:36:26,965 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 2838 selfloop transitions, 2547 changer transitions 63/5448 dead transitions. [2022-12-13 22:36:26,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 5448 transitions, 201002 flow [2022-12-13 22:36:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 22:36:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 22:36:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2911 transitions. [2022-12-13 22:36:26,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43395945140131187 [2022-12-13 22:36:26,968 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2911 transitions. [2022-12-13 22:36:26,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2911 transitions. [2022-12-13 22:36:26,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:36:26,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2911 transitions. [2022-12-13 22:36:26,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 74.64102564102564) internal successors, (2911), 39 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:36:26,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 172.0) internal successors, (6880), 40 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:36:26,973 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 172.0) internal successors, (6880), 40 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:36:26,973 INFO L175 Difference]: Start difference. First operand has 586 places, 4910 transitions, 176220 flow. Second operand 39 states and 2911 transitions. [2022-12-13 22:36:26,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 5448 transitions, 201002 flow [2022-12-13 22:37:57,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 5448 transitions, 200100 flow, removed 381 selfloop flow, removed 9 redundant places. [2022-12-13 22:37:57,929 INFO L231 Difference]: Finished difference. Result has 623 places, 5131 transitions, 191283 flow [2022-12-13 22:37:57,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=175290, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=191283, PETRI_PLACES=623, PETRI_TRANSITIONS=5131} [2022-12-13 22:37:57,932 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 594 predicate places. [2022-12-13 22:37:57,932 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 5131 transitions, 191283 flow [2022-12-13 22:37:57,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.71428571428571) internal successors, (1485), 21 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:37:57,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:37:57,932 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:37:57,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 22:37:58,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:37:58,132 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 22:37:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:37:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash 618043405, now seen corresponding path program 32 times [2022-12-13 22:37:58,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:37:58,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38947698] [2022-12-13 22:37:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:37:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:37:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:37:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:37:58,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:37:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38947698] [2022-12-13 22:37:58,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38947698] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:37:58,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349796788] [2022-12-13 22:37:58,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:37:58,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:37:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:37:58,215 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:37:58,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_083bd451-096f-4691-93b6-a3b9a793ffff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 22:37:58,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:37:58,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:37:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:37:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:37:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:37:58,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:37:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:37:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349796788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:37:58,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:37:58,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 21 [2022-12-13 22:37:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757468124] [2022-12-13 22:37:58,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:37:58,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 22:37:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:37:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 22:37:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-12-13 22:37:58,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 172 [2022-12-13 22:37:58,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 5131 transitions, 191283 flow. Second operand has 21 states, 21 states have (on average 70.71428571428571) internal successors, (1485), 21 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:37:58,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:37:58,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 172 [2022-12-13 22:37:58,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:38:55,675 INFO L130 PetriNetUnfolder]: 16597/31544 cut-off events. [2022-12-13 22:38:55,676 INFO L131 PetriNetUnfolder]: For 2642122/2642122 co-relation queries the response was YES. [2022-12-13 22:38:56,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445518 conditions, 31544 events. 16597/31544 cut-off events. For 2642122/2642122 co-relation queries the response was YES. Maximal size of possible extension queue 2277. Compared 310062 event pairs, 551 based on Foata normal form. 268/31810 useless extension candidates. Maximal degree in co-relation 445340. Up to 9662 conditions per place. [2022-12-13 22:38:56,308 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 1751 selfloop transitions, 3847 changer transitions 18/5616 dead transitions. [2022-12-13 22:38:56,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 5616 transitions, 213297 flow [2022-12-13 22:38:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 22:38:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 22:38:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3579 transitions. [2022-12-13 22:38:56,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4335029069767442 [2022-12-13 22:38:56,313 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3579 transitions. [2022-12-13 22:38:56,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3579 transitions. [2022-12-13 22:38:56,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:38:56,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3579 transitions. [2022-12-13 22:38:56,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 74.5625) internal successors, (3579), 48 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:38:56,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 172.0) internal successors, (8428), 49 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:38:56,324 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 172.0) internal successors, (8428), 49 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:38:56,324 INFO L175 Difference]: Start difference. First operand has 623 places, 5131 transitions, 191283 flow. Second operand 48 states and 3579 transitions. [2022-12-13 22:38:56,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 5616 transitions, 213297 flow