./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS --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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- 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-4e7fbc6 [2022-11-23 03:56:04,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:56:04,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:56:04,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:56:04,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:56:04,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:56:04,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:56:04,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:56:04,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:56:04,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:56:04,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:56:04,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:56:04,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:56:04,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:56:04,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:56:04,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:56:04,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:56:04,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:56:04,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:56:04,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:56:04,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:56:04,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:56:04,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:56:04,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:56:04,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:56:04,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:56:04,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:56:04,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:56:04,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:56:04,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:56:04,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:56:04,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:56:04,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:56:04,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:56:04,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:56:04,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:56:04,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:56:04,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:56:04,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:56:04,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:56:04,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:56:04,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:56:04,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:56:04,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:56:04,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:56:04,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:56:04,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:56:04,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:56:04,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:56:04,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:56:04,887 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:56:04,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:56:04,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:56:04,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:56:04,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:56:04,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:56:04,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:56:04,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:56:04,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:56:04,890 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:56:04,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:56:04,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:56:04,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:56:04,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:56:04,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:56:04,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:56:04,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:56:04,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:56:04,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:56:04,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:56:04,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:56:04,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:56:04,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:56:04,894 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:56:04,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:56:04,895 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_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2022-11-23 03:56:05,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:56:05,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:56:05,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:56:05,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:56:05,287 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:56:05,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-11-23 03:56:08,944 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:56:09,295 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:56:09,303 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-11-23 03:56:09,318 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/data/ed81c9d9b/de7834f655464ab5b930b6483414650c/FLAG68db3b7c5 [2022-11-23 03:56:09,336 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/data/ed81c9d9b/de7834f655464ab5b930b6483414650c [2022-11-23 03:56:09,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:56:09,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:56:09,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:56:09,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:56:09,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:56:09,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:09" (1/1) ... [2022-11-23 03:56:09,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12378d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:09, skipping insertion in model container [2022-11-23 03:56:09,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:09" (1/1) ... [2022-11-23 03:56:09,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:56:09,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:56:09,840 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_53328bbd-5709-4ead-be9f-f8dc367e5164/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-11-23 03:56:09,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:56:09,873 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:56:09,937 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_53328bbd-5709-4ead-be9f-f8dc367e5164/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-11-23 03:56:09,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:56:10,003 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:56:10,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10 WrapperNode [2022-11-23 03:56:10,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:56:10,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:56:10,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:56:10,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:56:10,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,089 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2022-11-23 03:56:10,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:56:10,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:56:10,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:56:10,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:56:10,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:56:10,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:56:10,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:56:10,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:56:10,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (1/1) ... [2022-11-23 03:56:10,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:56:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:56:10,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:56:10,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:56:10,224 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 03:56:10,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 03:56:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:56:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:56:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:56:10,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:56:10,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:56:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:56:10,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:56:10,234 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:56:10,449 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:56:10,472 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:56:10,736 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:56:10,798 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:56:10,799 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 03:56:10,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:56:10 BoogieIcfgContainer [2022-11-23 03:56:10,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:56:10,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:56:10,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:56:10,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:56:10,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:56:09" (1/3) ... [2022-11-23 03:56:10,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7804dd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:56:10, skipping insertion in model container [2022-11-23 03:56:10,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:10" (2/3) ... [2022-11-23 03:56:10,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7804dd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:56:10, skipping insertion in model container [2022-11-23 03:56:10,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:56:10" (3/3) ... [2022-11-23 03:56:10,814 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2022-11-23 03:56:10,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:56:10,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-23 03:56:10,841 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:56:10,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:56:11,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 101 flow [2022-11-23 03:56:11,072 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-23 03:56:11,073 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:11,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 3/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 112 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2022-11-23 03:56:11,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 101 flow [2022-11-23 03:56:11,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 48 transitions, 101 flow [2022-11-23 03:56:11,104 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:56:11,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 48 transitions, 101 flow [2022-11-23 03:56:11,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 48 transitions, 101 flow [2022-11-23 03:56:11,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 101 flow [2022-11-23 03:56:11,190 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-23 03:56:11,190 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:11,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 3/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 112 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2022-11-23 03:56:11,195 INFO L119 LiptonReduction]: Number of co-enabled transitions 456 [2022-11-23 03:56:13,451 INFO L134 LiptonReduction]: Checked pairs total: 441 [2022-11-23 03:56:13,451 INFO L136 LiptonReduction]: Total number of compositions: 51 [2022-11-23 03:56:13,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:56:13,494 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;@135eddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:56:13,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 03:56:13,496 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 03:56:13,497 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:13,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:13,498 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:13,499 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 03:56:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 8117, now seen corresponding path program 1 times [2022-11-23 03:56:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394507375] [2022-11-23 03:56:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:13,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:13,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394507375] [2022-11-23 03:56:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394507375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:13,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:13,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948127190] [2022-11-23 03:56:13,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:56:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:56:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:56:13,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 99 [2022-11-23 03:56:13,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 flow. Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:13,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:13,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 99 [2022-11-23 03:56:13,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:13,826 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2022-11-23 03:56:13,826 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 20 events. 4/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 41 event pairs, 4 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 26. Up to 19 conditions per place. [2022-11-23 03:56:13,828 INFO L137 encePairwiseOnDemand]: 96/99 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2022-11-23 03:56:13,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 8 transitions, 35 flow [2022-11-23 03:56:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:56:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 03:56:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2022-11-23 03:56:13,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2022-11-23 03:56:13,845 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 92 transitions. [2022-11-23 03:56:13,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 92 transitions. [2022-11-23 03:56:13,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:13,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 92 transitions. [2022-11-23 03:56:13,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:13,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:13,859 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:13,862 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 2 states and 92 transitions. [2022-11-23 03:56:13,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 8 transitions, 35 flow [2022-11-23 03:56:13,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:56:13,867 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 21 flow [2022-11-23 03:56:13,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2022-11-23 03:56:13,874 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2022-11-23 03:56:13,875 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 21 flow [2022-11-23 03:56:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:13,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:13,876 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:13,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:56:13,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 03:56:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash 8114, now seen corresponding path program 1 times [2022-11-23 03:56:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071557194] [2022-11-23 03:56:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071557194] [2022-11-23 03:56:14,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071557194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:14,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:14,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181917534] [2022-11-23 03:56:14,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:14,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 99 [2022-11-23 03:56:14,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:14,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 99 [2022-11-23 03:56:14,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:14,067 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-23 03:56:14,067 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:14,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 3 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 34. Up to 14 conditions per place. [2022-11-23 03:56:14,068 INFO L137 encePairwiseOnDemand]: 97/99 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2022-11-23 03:56:14,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 7 transitions, 31 flow [2022-11-23 03:56:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2022-11-23 03:56:14,071 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39730639730639733 [2022-11-23 03:56:14,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 118 transitions. [2022-11-23 03:56:14,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 118 transitions. [2022-11-23 03:56:14,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:14,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 118 transitions. [2022-11-23 03:56:14,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,075 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 21 flow. Second operand 3 states and 118 transitions. [2022-11-23 03:56:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 7 transitions, 31 flow [2022-11-23 03:56:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:56:14,077 INFO L231 Difference]: Finished difference. Result has 13 places, 7 transitions, 21 flow [2022-11-23 03:56:14,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2022-11-23 03:56:14,078 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2022-11-23 03:56:14,078 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 21 flow [2022-11-23 03:56:14,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:14,079 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:14,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:56:14,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 03:56:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash 8113, now seen corresponding path program 1 times [2022-11-23 03:56:14,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:14,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700447092] [2022-11-23 03:56:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:14,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:14,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:14,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700447092] [2022-11-23 03:56:14,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700447092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:14,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:14,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391214966] [2022-11-23 03:56:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:14,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:14,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:14,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 99 [2022-11-23 03:56:14,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:14,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 99 [2022-11-23 03:56:14,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:14,190 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2022-11-23 03:56:14,190 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:14,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 27. Up to 10 conditions per place. [2022-11-23 03:56:14,193 INFO L137 encePairwiseOnDemand]: 97/99 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2022-11-23 03:56:14,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 6 transitions, 29 flow [2022-11-23 03:56:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2022-11-23 03:56:14,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2022-11-23 03:56:14,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2022-11-23 03:56:14,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2022-11-23 03:56:14,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:14,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2022-11-23 03:56:14,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,201 INFO L175 Difference]: Start difference. First operand has 13 places, 7 transitions, 21 flow. Second operand 3 states and 111 transitions. [2022-11-23 03:56:14,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 6 transitions, 29 flow [2022-11-23 03:56:14,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:14,202 INFO L231 Difference]: Finished difference. Result has 13 places, 6 transitions, 20 flow [2022-11-23 03:56:14,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2022-11-23 03:56:14,203 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -1 predicate places. [2022-11-23 03:56:14,204 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 20 flow [2022-11-23 03:56:14,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:14,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:14,204 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 03:56:14,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:56:14,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 03:56:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1090221445, now seen corresponding path program 1 times [2022-11-23 03:56:14,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:14,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312432260] [2022-11-23 03:56:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:14,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:56:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:14,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:56:14,313 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:56:14,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-23 03:56:14,319 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-11-23 03:56:14,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2022-11-23 03:56:14,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-11-23 03:56:14,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2022-11-23 03:56:14,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-11-23 03:56:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:56:14,323 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 03:56:14,328 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:56:14,328 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 03:56:14,359 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:56:14,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2022-11-23 03:56:14,388 INFO L130 PetriNetUnfolder]: 5/95 cut-off events. [2022-11-23 03:56:14,388 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:56:14,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 95 events. 5/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 207 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 65. Up to 6 conditions per place. [2022-11-23 03:56:14,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 134 flow [2022-11-23 03:56:14,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 134 flow [2022-11-23 03:56:14,404 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:56:14,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 134 flow [2022-11-23 03:56:14,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 134 flow [2022-11-23 03:56:14,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2022-11-23 03:56:14,438 INFO L130 PetriNetUnfolder]: 5/95 cut-off events. [2022-11-23 03:56:14,439 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:56:14,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 95 events. 5/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 207 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 65. Up to 6 conditions per place. [2022-11-23 03:56:14,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2022-11-23 03:56:16,155 INFO L134 LiptonReduction]: Checked pairs total: 3409 [2022-11-23 03:56:16,155 INFO L136 LiptonReduction]: Total number of compositions: 51 [2022-11-23 03:56:16,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:56:16,162 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;@135eddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:56:16,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-23 03:56:16,171 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 03:56:16,172 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:16,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:16,178 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:16,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-23 03:56:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 12084, now seen corresponding path program 1 times [2022-11-23 03:56:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070212114] [2022-11-23 03:56:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:16,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:16,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070212114] [2022-11-23 03:56:16,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070212114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:16,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:16,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:16,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322866990] [2022-11-23 03:56:16,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:16,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:16,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:16,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:16,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 112 [2022-11-23 03:56:16,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:16,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 112 [2022-11-23 03:56:16,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:16,384 INFO L130 PetriNetUnfolder]: 86/220 cut-off events. [2022-11-23 03:56:16,384 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-23 03:56:16,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 220 events. 86/220 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1188 event pairs, 86 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 103. Up to 164 conditions per place. [2022-11-23 03:56:16,387 INFO L137 encePairwiseOnDemand]: 107/112 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2022-11-23 03:56:16,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 76 flow [2022-11-23 03:56:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2022-11-23 03:56:16,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2022-11-23 03:56:16,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2022-11-23 03:56:16,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2022-11-23 03:56:16,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:16,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2022-11-23 03:56:16,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,393 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 60 flow. Second operand 3 states and 151 transitions. [2022-11-23 03:56:16,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 76 flow [2022-11-23 03:56:16,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 74 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-23 03:56:16,395 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 52 flow [2022-11-23 03:56:16,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-11-23 03:56:16,396 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2022-11-23 03:56:16,397 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 52 flow [2022-11-23 03:56:16,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:16,397 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:16,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:56:16,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-23 03:56:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash 12085, now seen corresponding path program 1 times [2022-11-23 03:56:16,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:16,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441691371] [2022-11-23 03:56:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441691371] [2022-11-23 03:56:16,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441691371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:16,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:16,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905547291] [2022-11-23 03:56:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:16,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:16,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 112 [2022-11-23 03:56:16,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:16,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 112 [2022-11-23 03:56:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:16,527 INFO L130 PetriNetUnfolder]: 51/145 cut-off events. [2022-11-23 03:56:16,528 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-23 03:56:16,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 145 events. 51/145 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 673 event pairs, 51 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 267. Up to 103 conditions per place. [2022-11-23 03:56:16,533 INFO L137 encePairwiseOnDemand]: 110/112 looper letters, 10 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-23 03:56:16,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 72 flow [2022-11-23 03:56:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2022-11-23 03:56:16,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2022-11-23 03:56:16,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2022-11-23 03:56:16,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2022-11-23 03:56:16,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:16,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2022-11-23 03:56:16,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,545 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 3 states and 141 transitions. [2022-11-23 03:56:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 72 flow [2022-11-23 03:56:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:16,547 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2022-11-23 03:56:16,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2022-11-23 03:56:16,552 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2022-11-23 03:56:16,552 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2022-11-23 03:56:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:16,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:56:16,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-23 03:56:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1682663391, now seen corresponding path program 1 times [2022-11-23 03:56:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:16,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932773256] [2022-11-23 03:56:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:16,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:16,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932773256] [2022-11-23 03:56:16,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932773256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:16,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:16,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:56:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407552255] [2022-11-23 03:56:16,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:16,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:16,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 112 [2022-11-23 03:56:16,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:16,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 112 [2022-11-23 03:56:16,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:16,747 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2022-11-23 03:56:16,748 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 03:56:16,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 220 events. 97/220 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1032 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 436. Up to 143 conditions per place. [2022-11-23 03:56:16,750 INFO L137 encePairwiseOnDemand]: 105/112 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2022-11-23 03:56:16,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 130 flow [2022-11-23 03:56:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2022-11-23 03:56:16,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-11-23 03:56:16,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2022-11-23 03:56:16,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2022-11-23 03:56:16,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:16,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2022-11-23 03:56:16,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,756 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 51 flow. Second operand 3 states and 154 transitions. [2022-11-23 03:56:16,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 130 flow [2022-11-23 03:56:16,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:16,758 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 90 flow [2022-11-23 03:56:16,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2022-11-23 03:56:16,759 INFO L288 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2022-11-23 03:56:16,759 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 90 flow [2022-11-23 03:56:16,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:16,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:16,760 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 03:56:16,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:56:16,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-23 03:56:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:16,761 INFO L85 PathProgramCache]: Analyzing trace with hash -869587704, now seen corresponding path program 1 times [2022-11-23 03:56:16,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:16,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479087075] [2022-11-23 03:56:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:16,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:16,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:56:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:16,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:56:16,789 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:56:16,789 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-23 03:56:16,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-11-23 03:56:16,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2022-11-23 03:56:16,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-23 03:56:16,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-23 03:56:16,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-23 03:56:16,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-23 03:56:16,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:56:16,791 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 03:56:16,792 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:56:16,792 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 03:56:16,810 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:56:16,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 169 flow [2022-11-23 03:56:16,830 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2022-11-23 03:56:16,830 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 03:56:16,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 126 events. 7/126 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 99. Up to 8 conditions per place. [2022-11-23 03:56:16,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 169 flow [2022-11-23 03:56:16,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 74 transitions, 169 flow [2022-11-23 03:56:16,833 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:56:16,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 74 transitions, 169 flow [2022-11-23 03:56:16,834 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 74 transitions, 169 flow [2022-11-23 03:56:16,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 169 flow [2022-11-23 03:56:16,850 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2022-11-23 03:56:16,851 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 03:56:16,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 126 events. 7/126 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 99. Up to 8 conditions per place. [2022-11-23 03:56:16,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 2304 [2022-11-23 03:56:18,828 INFO L134 LiptonReduction]: Checked pairs total: 7726 [2022-11-23 03:56:18,829 INFO L136 LiptonReduction]: Total number of compositions: 66 [2022-11-23 03:56:18,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:56:18,832 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;@135eddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:56:18,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-23 03:56:18,833 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 03:56:18,833 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:18,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:18,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:18,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:56:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 16971, now seen corresponding path program 1 times [2022-11-23 03:56:18,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:18,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041714222] [2022-11-23 03:56:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:18,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:18,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:18,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041714222] [2022-11-23 03:56:18,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041714222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:18,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:18,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592842915] [2022-11-23 03:56:18,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:18,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 140 [2022-11-23 03:56:18,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:18,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:18,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 140 [2022-11-23 03:56:18,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:19,084 INFO L130 PetriNetUnfolder]: 450/952 cut-off events. [2022-11-23 03:56:19,084 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-11-23 03:56:19,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 952 events. 450/952 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6607 event pairs, 450 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 348. Up to 705 conditions per place. [2022-11-23 03:56:19,094 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-11-23 03:56:19,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 105 flow [2022-11-23 03:56:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2022-11-23 03:56:19,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2022-11-23 03:56:19,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2022-11-23 03:56:19,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2022-11-23 03:56:19,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:19,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2022-11-23 03:56:19,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,101 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 87 flow. Second operand 3 states and 180 transitions. [2022-11-23 03:56:19,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 105 flow [2022-11-23 03:56:19,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 99 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-23 03:56:19,105 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 71 flow [2022-11-23 03:56:19,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2022-11-23 03:56:19,107 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2022-11-23 03:56:19,108 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 71 flow [2022-11-23 03:56:19,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:19,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 03:56:19,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:56:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash 16970, now seen corresponding path program 1 times [2022-11-23 03:56:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:19,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211152411] [2022-11-23 03:56:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:19,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:19,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211152411] [2022-11-23 03:56:19,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211152411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:19,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:19,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714181736] [2022-11-23 03:56:19,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:19,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:19,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:19,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 140 [2022-11-23 03:56:19,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:19,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 140 [2022-11-23 03:56:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:19,292 INFO L130 PetriNetUnfolder]: 279/633 cut-off events. [2022-11-23 03:56:19,293 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-23 03:56:19,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 633 events. 279/633 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4081 event pairs, 279 based on Foata normal form. 0/597 useless extension candidates. Maximal degree in co-relation 1158. Up to 449 conditions per place. [2022-11-23 03:56:19,299 INFO L137 encePairwiseOnDemand]: 138/140 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-23 03:56:19,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 97 flow [2022-11-23 03:56:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2022-11-23 03:56:19,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-11-23 03:56:19,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2022-11-23 03:56:19,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2022-11-23 03:56:19,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:19,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2022-11-23 03:56:19,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,303 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 71 flow. Second operand 3 states and 168 transitions. [2022-11-23 03:56:19,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 97 flow [2022-11-23 03:56:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:19,305 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 70 flow [2022-11-23 03:56:19,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2022-11-23 03:56:19,306 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2022-11-23 03:56:19,306 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 70 flow [2022-11-23 03:56:19,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:19,306 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:19,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 03:56:19,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:56:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 891827987, now seen corresponding path program 1 times [2022-11-23 03:56:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:19,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684304505] [2022-11-23 03:56:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:19,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684304505] [2022-11-23 03:56:19,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684304505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:19,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:19,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:56:19,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495993836] [2022-11-23 03:56:19,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:19,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:19,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:19,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 140 [2022-11-23 03:56:19,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:19,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 140 [2022-11-23 03:56:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:19,656 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2022-11-23 03:56:19,656 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-23 03:56:19,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1762 events. 966/1762 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11534 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 3456. Up to 993 conditions per place. [2022-11-23 03:56:19,673 INFO L137 encePairwiseOnDemand]: 130/140 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-11-23 03:56:19,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 180 flow [2022-11-23 03:56:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2022-11-23 03:56:19,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2022-11-23 03:56:19,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2022-11-23 03:56:19,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2022-11-23 03:56:19,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:19,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2022-11-23 03:56:19,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,679 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 70 flow. Second operand 3 states and 179 transitions. [2022-11-23 03:56:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 180 flow [2022-11-23 03:56:19,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:19,681 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 127 flow [2022-11-23 03:56:19,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-11-23 03:56:19,682 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2022-11-23 03:56:19,683 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 127 flow [2022-11-23 03:56:19,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:19,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:19,684 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:19,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 03:56:19,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:56:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:19,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1547317452, now seen corresponding path program 1 times [2022-11-23 03:56:19,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:19,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938424081] [2022-11-23 03:56:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:19,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:19,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938424081] [2022-11-23 03:56:19,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938424081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:56:19,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829527094] [2022-11-23 03:56:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:19,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:56:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:56:19,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:56:19,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:56:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:19,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:56:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:56:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:56:20,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:56:20,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829527094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:20,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:56:20,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-23 03:56:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906519917] [2022-11-23 03:56:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:56:20,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 140 [2022-11-23 03:56:20,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:20,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:20,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 140 [2022-11-23 03:56:20,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:20,186 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2022-11-23 03:56:20,186 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-11-23 03:56:20,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1152 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 519. Up to 58 conditions per place. [2022-11-23 03:56:20,189 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2022-11-23 03:56:20,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 135 flow [2022-11-23 03:56:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2022-11-23 03:56:20,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2022-11-23 03:56:20,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2022-11-23 03:56:20,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2022-11-23 03:56:20,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:20,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2022-11-23 03:56:20,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:20,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:20,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:20,194 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 127 flow. Second operand 3 states and 185 transitions. [2022-11-23 03:56:20,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 135 flow [2022-11-23 03:56:20,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:56:20,198 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 75 flow [2022-11-23 03:56:20,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2022-11-23 03:56:20,199 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2022-11-23 03:56:20,199 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 75 flow [2022-11-23 03:56:20,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:20,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:20,200 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 03:56:20,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 03:56:20,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53328bbd-5709-4ead-be9f-f8dc367e5164/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:56:20,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-23 03:56:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash 410441860, now seen corresponding path program 1 times [2022-11-23 03:56:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:20,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421885212] [2022-11-23 03:56:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:20,428 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:56:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:20,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:56:20,446 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:56:20,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-23 03:56:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2022-11-23 03:56:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2022-11-23 03:56:20,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-23 03:56:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-23 03:56:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-11-23 03:56:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-11-23 03:56:20,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-23 03:56:20,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 03:56:20,449 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-23 03:56:20,450 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:56:20,450 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-23 03:56:20,479 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:56:20,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 87 transitions, 206 flow [2022-11-23 03:56:20,506 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2022-11-23 03:56:20,506 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 03:56:20,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 157 events. 9/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 134. Up to 10 conditions per place. [2022-11-23 03:56:20,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 87 transitions, 206 flow [2022-11-23 03:56:20,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 87 transitions, 206 flow [2022-11-23 03:56:20,510 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:56:20,510 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 87 transitions, 206 flow [2022-11-23 03:56:20,510 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 87 transitions, 206 flow [2022-11-23 03:56:20,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 87 transitions, 206 flow [2022-11-23 03:56:20,533 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2022-11-23 03:56:20,534 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 03:56:20,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 157 events. 9/157 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 134. Up to 10 conditions per place. [2022-11-23 03:56:20,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 3696 [2022-11-23 03:56:23,093 INFO L134 LiptonReduction]: Checked pairs total: 16132 [2022-11-23 03:56:23,094 INFO L136 LiptonReduction]: Total number of compositions: 77 [2022-11-23 03:56:23,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:56:23,096 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;@135eddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:56:23,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-23 03:56:23,098 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 03:56:23,098 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:23,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:23,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:23,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 03:56:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 22505, now seen corresponding path program 1 times [2022-11-23 03:56:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843968540] [2022-11-23 03:56:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:23,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843968540] [2022-11-23 03:56:23,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843968540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:23,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:23,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087833350] [2022-11-23 03:56:23,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:23,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:23,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:23,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 164 [2022-11-23 03:56:23,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:23,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:23,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 164 [2022-11-23 03:56:23,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:23,876 INFO L130 PetriNetUnfolder]: 2562/4584 cut-off events. [2022-11-23 03:56:23,876 INFO L131 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2022-11-23 03:56:23,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8829 conditions, 4584 events. 2562/4584 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36127 event pairs, 2562 based on Foata normal form. 0/4095 useless extension candidates. Maximal degree in co-relation 1820. Up to 3585 conditions per place. [2022-11-23 03:56:23,920 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 18 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-11-23 03:56:23,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 138 flow [2022-11-23 03:56:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2022-11-23 03:56:23,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2022-11-23 03:56:23,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2022-11-23 03:56:23,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2022-11-23 03:56:23,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:23,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2022-11-23 03:56:23,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:23,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:23,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:23,926 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 114 flow. Second operand 3 states and 203 transitions. [2022-11-23 03:56:23,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 138 flow [2022-11-23 03:56:23,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 34 transitions, 126 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-23 03:56:23,932 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 90 flow [2022-11-23 03:56:23,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2022-11-23 03:56:23,933 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2022-11-23 03:56:23,933 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 90 flow [2022-11-23 03:56:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:23,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:23,934 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 03:56:23,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 03:56:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 22507, now seen corresponding path program 1 times [2022-11-23 03:56:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490855863] [2022-11-23 03:56:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:24,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490855863] [2022-11-23 03:56:24,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490855863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:24,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:24,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222168538] [2022-11-23 03:56:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:24,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:24,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 164 [2022-11-23 03:56:24,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:24,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:24,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 164 [2022-11-23 03:56:24,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:24,605 INFO L130 PetriNetUnfolder]: 1623/3049 cut-off events. [2022-11-23 03:56:24,605 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-23 03:56:24,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 3049 events. 1623/3049 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23152 event pairs, 1623 based on Foata normal form. 0/2901 useless extension candidates. Maximal degree in co-relation 5670. Up to 2305 conditions per place. [2022-11-23 03:56:24,646 INFO L137 encePairwiseOnDemand]: 162/164 looper letters, 17 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2022-11-23 03:56:24,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 33 transitions, 124 flow [2022-11-23 03:56:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2022-11-23 03:56:24,649 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2022-11-23 03:56:24,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2022-11-23 03:56:24,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2022-11-23 03:56:24,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:24,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2022-11-23 03:56:24,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:24,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:24,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:24,656 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 90 flow. Second operand 3 states and 202 transitions. [2022-11-23 03:56:24,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 33 transitions, 124 flow [2022-11-23 03:56:24,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:24,658 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 89 flow [2022-11-23 03:56:24,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-11-23 03:56:24,659 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2022-11-23 03:56:24,660 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 89 flow [2022-11-23 03:56:24,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:24,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:24,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:24,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 03:56:24,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 03:56:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash 654571235, now seen corresponding path program 1 times [2022-11-23 03:56:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:24,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792307662] [2022-11-23 03:56:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:24,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:24,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:24,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792307662] [2022-11-23 03:56:24,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792307662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:24,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:24,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:56:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498286030] [2022-11-23 03:56:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:24,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:24,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 164 [2022-11-23 03:56:24,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:24,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:24,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 164 [2022-11-23 03:56:24,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:26,925 INFO L130 PetriNetUnfolder]: 9634/15076 cut-off events. [2022-11-23 03:56:26,926 INFO L131 PetriNetUnfolder]: For 815/815 co-relation queries the response was YES. [2022-11-23 03:56:26,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29792 conditions, 15076 events. 9634/15076 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 113236 event pairs, 5177 based on Foata normal form. 1970/16770 useless extension candidates. Maximal degree in co-relation 29781. Up to 8161 conditions per place. [2022-11-23 03:56:27,041 INFO L137 encePairwiseOnDemand]: 151/164 looper letters, 37 selfloop transitions, 9 changer transitions 0/53 dead transitions. [2022-11-23 03:56:27,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 236 flow [2022-11-23 03:56:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2022-11-23 03:56:27,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2022-11-23 03:56:27,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2022-11-23 03:56:27,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2022-11-23 03:56:27,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:27,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2022-11-23 03:56:27,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,050 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 89 flow. Second operand 3 states and 206 transitions. [2022-11-23 03:56:27,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 236 flow [2022-11-23 03:56:27,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:27,055 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2022-11-23 03:56:27,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2022-11-23 03:56:27,058 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2022-11-23 03:56:27,058 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2022-11-23 03:56:27,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:27,059 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 03:56:27,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 03:56:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2011749225, now seen corresponding path program 1 times [2022-11-23 03:56:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:27,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365660066] [2022-11-23 03:56:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:56:27,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:27,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365660066] [2022-11-23 03:56:27,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365660066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:27,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:27,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:56:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093226092] [2022-11-23 03:56:27,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:27,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:27,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:27,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 164 [2022-11-23 03:56:27,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:27,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 164 [2022-11-23 03:56:27,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:27,266 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2022-11-23 03:56:27,267 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-11-23 03:56:27,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4231 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 1443. Up to 164 conditions per place. [2022-11-23 03:56:27,273 INFO L137 encePairwiseOnDemand]: 156/164 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2022-11-23 03:56:27,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 33 transitions, 175 flow [2022-11-23 03:56:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2022-11-23 03:56:27,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2022-11-23 03:56:27,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2022-11-23 03:56:27,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2022-11-23 03:56:27,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:27,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2022-11-23 03:56:27,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,279 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 3 states and 214 transitions. [2022-11-23 03:56:27,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 33 transitions, 175 flow [2022-11-23 03:56:27,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:56:27,284 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 96 flow [2022-11-23 03:56:27,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2022-11-23 03:56:27,286 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2022-11-23 03:56:27,286 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 96 flow [2022-11-23 03:56:27,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:27,286 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:27,287 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:27,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 03:56:27,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-23 03:56:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1192403802, now seen corresponding path program 1 times [2022-11-23 03:56:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:27,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877840571] [2022-11-23 03:56:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:27,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:27,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:56:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:27,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:56:27,335 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:56:27,336 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-23 03:56:27,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2022-11-23 03:56:27,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 9 remaining) [2022-11-23 03:56:27,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-23 03:56:27,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-23 03:56:27,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2022-11-23 03:56:27,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2022-11-23 03:56:27,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2022-11-23 03:56:27,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-23 03:56:27,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 03:56:27,338 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-23 03:56:27,339 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:56:27,339 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-23 03:56:27,362 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:56:27,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 245 flow [2022-11-23 03:56:27,389 INFO L130 PetriNetUnfolder]: 11/188 cut-off events. [2022-11-23 03:56:27,389 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 03:56:27,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 188 events. 11/188 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 474 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 170. Up to 12 conditions per place. [2022-11-23 03:56:27,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 100 transitions, 245 flow [2022-11-23 03:56:27,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 245 flow [2022-11-23 03:56:27,392 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:56:27,392 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 245 flow [2022-11-23 03:56:27,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 245 flow [2022-11-23 03:56:27,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 245 flow [2022-11-23 03:56:27,416 INFO L130 PetriNetUnfolder]: 11/188 cut-off events. [2022-11-23 03:56:27,416 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-23 03:56:27,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 188 events. 11/188 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 474 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 170. Up to 12 conditions per place. [2022-11-23 03:56:27,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2022-11-23 03:56:30,167 INFO L134 LiptonReduction]: Checked pairs total: 19991 [2022-11-23 03:56:30,168 INFO L136 LiptonReduction]: Total number of compositions: 88 [2022-11-23 03:56:30,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:56:30,172 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;@135eddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:56:30,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-23 03:56:30,174 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 03:56:30,174 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:30,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:30,174 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:30,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-23 03:56:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:30,175 INFO L85 PathProgramCache]: Analyzing trace with hash 28937, now seen corresponding path program 1 times [2022-11-23 03:56:30,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:30,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959778674] [2022-11-23 03:56:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:30,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959778674] [2022-11-23 03:56:30,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959778674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:30,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:30,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:30,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162127436] [2022-11-23 03:56:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:30,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 188 [2022-11-23 03:56:30,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:30,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:30,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 188 [2022-11-23 03:56:30,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:33,849 INFO L130 PetriNetUnfolder]: 13314/21416 cut-off events. [2022-11-23 03:56:33,849 INFO L131 PetriNetUnfolder]: For 6750/6750 co-relation queries the response was YES. [2022-11-23 03:56:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42046 conditions, 21416 events. 13314/21416 cut-off events. For 6750/6750 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 181591 event pairs, 13314 based on Foata normal form. 0/19455 useless extension candidates. Maximal degree in co-relation 8972. Up to 17409 conditions per place. [2022-11-23 03:56:34,043 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 22 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-11-23 03:56:34,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 173 flow [2022-11-23 03:56:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2022-11-23 03:56:34,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4219858156028369 [2022-11-23 03:56:34,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2022-11-23 03:56:34,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2022-11-23 03:56:34,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:34,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2022-11-23 03:56:34,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:34,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:34,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:34,053 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 143 flow. Second operand 3 states and 238 transitions. [2022-11-23 03:56:34,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 173 flow [2022-11-23 03:56:34,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 153 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-23 03:56:34,062 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 109 flow [2022-11-23 03:56:34,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2022-11-23 03:56:34,064 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2022-11-23 03:56:34,064 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 109 flow [2022-11-23 03:56:34,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:34,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:34,065 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:34,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 03:56:34,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-23 03:56:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash 28938, now seen corresponding path program 1 times [2022-11-23 03:56:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:34,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973131245] [2022-11-23 03:56:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:34,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973131245] [2022-11-23 03:56:34,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973131245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:34,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:34,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572830944] [2022-11-23 03:56:34,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:34,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:34,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:34,120 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 188 [2022-11-23 03:56:34,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:34,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:34,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 188 [2022-11-23 03:56:34,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:36,101 INFO L130 PetriNetUnfolder]: 8535/14249 cut-off events. [2022-11-23 03:56:36,101 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2022-11-23 03:56:36,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26801 conditions, 14249 events. 8535/14249 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 119089 event pairs, 8535 based on Foata normal form. 0/13653 useless extension candidates. Maximal degree in co-relation 26790. Up to 11265 conditions per place. [2022-11-23 03:56:36,218 INFO L137 encePairwiseOnDemand]: 186/188 looper letters, 21 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-23 03:56:36,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 151 flow [2022-11-23 03:56:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2022-11-23 03:56:36,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3971631205673759 [2022-11-23 03:56:36,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2022-11-23 03:56:36,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2022-11-23 03:56:36,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:36,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2022-11-23 03:56:36,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:36,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:36,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:36,226 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 109 flow. Second operand 3 states and 224 transitions. [2022-11-23 03:56:36,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 151 flow [2022-11-23 03:56:36,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:36,229 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 108 flow [2022-11-23 03:56:36,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2022-11-23 03:56:36,231 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2022-11-23 03:56:36,232 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 108 flow [2022-11-23 03:56:36,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:36,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:36,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 03:56:36,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-23 03:56:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 323628806, now seen corresponding path program 1 times [2022-11-23 03:56:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:36,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862321165] [2022-11-23 03:56:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:36,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862321165] [2022-11-23 03:56:36,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862321165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:36,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:36,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:56:36,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275618290] [2022-11-23 03:56:36,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:36,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:36,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:36,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:36,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 188 [2022-11-23 03:56:36,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:36,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:36,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 188 [2022-11-23 03:56:36,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:49,069 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2022-11-23 03:56:49,069 INFO L131 PetriNetUnfolder]: For 5676/5676 co-relation queries the response was YES. [2022-11-23 03:56:49,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238434 conditions, 120198 events. 84206/120198 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 967703 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 238422. Up to 62881 conditions per place. [2022-11-23 03:56:49,945 INFO L137 encePairwiseOnDemand]: 172/188 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2022-11-23 03:56:49,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 292 flow [2022-11-23 03:56:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-11-23 03:56:49,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2022-11-23 03:56:49,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-11-23 03:56:49,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-11-23 03:56:49,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:49,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-11-23 03:56:49,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:49,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:49,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:49,952 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 108 flow. Second operand 3 states and 233 transitions. [2022-11-23 03:56:49,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 292 flow [2022-11-23 03:56:49,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:56:49,984 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 201 flow [2022-11-23 03:56:49,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2022-11-23 03:56:49,985 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2022-11-23 03:56:49,986 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 201 flow [2022-11-23 03:56:49,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:49,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:49,986 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:49,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 03:56:49,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-23 03:56:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 540537442, now seen corresponding path program 1 times [2022-11-23 03:56:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095789217] [2022-11-23 03:56:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:56:50,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:50,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095789217] [2022-11-23 03:56:50,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095789217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:50,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:50,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:56:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291868043] [2022-11-23 03:56:50,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:56:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:56:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:56:50,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 188 [2022-11-23 03:56:50,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:50,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:50,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 188 [2022-11-23 03:56:50,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:56:50,272 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2022-11-23 03:56:50,272 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-23 03:56:50,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13511 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 3715. Up to 436 conditions per place. [2022-11-23 03:56:50,278 INFO L137 encePairwiseOnDemand]: 178/188 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2022-11-23 03:56:50,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 215 flow [2022-11-23 03:56:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:56:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:56:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-11-23 03:56:50,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308510638297872 [2022-11-23 03:56:50,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-11-23 03:56:50,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-11-23 03:56:50,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:56:50,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-11-23 03:56:50,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:50,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:50,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:50,287 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 201 flow. Second operand 3 states and 243 transitions. [2022-11-23 03:56:50,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 215 flow [2022-11-23 03:56:50,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:56:50,296 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 117 flow [2022-11-23 03:56:50,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2022-11-23 03:56:50,296 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2022-11-23 03:56:50,297 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 117 flow [2022-11-23 03:56:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:50,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:50,297 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:56:50,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 03:56:50,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-23 03:56:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:50,299 INFO L85 PathProgramCache]: Analyzing trace with hash -824798877, now seen corresponding path program 1 times [2022-11-23 03:56:50,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:50,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088196692] [2022-11-23 03:56:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:50,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:50,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 03:56:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 03:56:50,616 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 03:56:50,617 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 03:56:50,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-23 03:56:50,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2022-11-23 03:56:50,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2022-11-23 03:56:50,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-11-23 03:56:50,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-11-23 03:56:50,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2022-11-23 03:56:50,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-11-23 03:56:50,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-11-23 03:56:50,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-11-23 03:56:50,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-23 03:56:50,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 03:56:50,620 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-23 03:56:50,621 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 03:56:50,621 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-23 03:56:50,661 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 03:56:50,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 113 transitions, 286 flow [2022-11-23 03:56:50,692 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2022-11-23 03:56:50,693 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-23 03:56:50,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 219 events. 13/219 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 568 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 207. Up to 14 conditions per place. [2022-11-23 03:56:50,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 113 transitions, 286 flow [2022-11-23 03:56:50,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 113 transitions, 286 flow [2022-11-23 03:56:50,696 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:56:50,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 113 transitions, 286 flow [2022-11-23 03:56:50,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 113 transitions, 286 flow [2022-11-23 03:56:50,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 113 transitions, 286 flow [2022-11-23 03:56:50,722 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2022-11-23 03:56:50,722 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-23 03:56:50,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 219 events. 13/219 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 568 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 207. Up to 14 conditions per place. [2022-11-23 03:56:50,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 7416 [2022-11-23 03:56:53,693 INFO L134 LiptonReduction]: Checked pairs total: 35196 [2022-11-23 03:56:53,693 INFO L136 LiptonReduction]: Total number of compositions: 95 [2022-11-23 03:56:53,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:56:53,697 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;@135eddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:56:53,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-23 03:56:53,698 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 03:56:53,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:56:53,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:56:53,699 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:56:53,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 03:56:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:56:53,699 INFO L85 PathProgramCache]: Analyzing trace with hash 35947, now seen corresponding path program 1 times [2022-11-23 03:56:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:56:53,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120775815] [2022-11-23 03:56:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:56:53,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:56:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:56:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:56:53,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:56:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120775815] [2022-11-23 03:56:53,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120775815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:56:53,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:56:53,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:56:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007765481] [2022-11-23 03:56:53,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:56:53,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:56:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:56:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:56:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:56:53,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 208 [2022-11-23 03:56:53,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 172 flow. Second operand has 2 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:56:53,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:56:53,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 208 [2022-11-23 03:56:53,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:57:11,001 INFO L130 PetriNetUnfolder]: 107181/149159 cut-off events. [2022-11-23 03:57:11,001 INFO L131 PetriNetUnfolder]: For 39518/39518 co-relation queries the response was YES. [2022-11-23 03:57:11,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297534 conditions, 149159 events. 107181/149159 cut-off events. For 39518/39518 co-relation queries the response was YES. Maximal size of possible extension queue 7811. Compared 1235774 event pairs, 107181 based on Foata normal form. 0/129705 useless extension candidates. Maximal degree in co-relation 64651. Up to 133122 conditions per place. [2022-11-23 03:57:12,513 INFO L137 encePairwiseOnDemand]: 201/208 looper letters, 29 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2022-11-23 03:57:12,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 216 flow [2022-11-23 03:57:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:57:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 03:57:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 198 transitions. [2022-11-23 03:57:12,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2022-11-23 03:57:12,516 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 198 transitions. [2022-11-23 03:57:12,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 198 transitions. [2022-11-23 03:57:12,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:57:12,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 198 transitions. [2022-11-23 03:57:12,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:12,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:12,527 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:12,527 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 172 flow. Second operand 2 states and 198 transitions. [2022-11-23 03:57:12,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 216 flow [2022-11-23 03:57:12,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 49 transitions, 186 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-23 03:57:12,593 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 128 flow [2022-11-23 03:57:12,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2022-11-23 03:57:12,594 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2022-11-23 03:57:12,594 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 128 flow [2022-11-23 03:57:12,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:57:12,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:57:12,595 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:57:12,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 03:57:12,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-23 03:57:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:57:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash 35946, now seen corresponding path program 1 times [2022-11-23 03:57:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:57:12,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694963537] [2022-11-23 03:57:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:57:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:57:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:57:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:57:12,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:57:12,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694963537] [2022-11-23 03:57:12,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694963537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:57:12,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:57:12,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:57:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842732494] [2022-11-23 03:57:12,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:57:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:57:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:57:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:57:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:57:12,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 208 [2022-11-23 03:57:12,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 128 flow. Second operand has 3 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) [2022-11-23 03:57:12,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:57:12,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 208 [2022-11-23 03:57:12,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand