./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-2329fc7 [2022-12-13 12:28:37,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:28:37,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:28:37,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:28:37,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:28:37,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:28:37,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:28:37,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:28:37,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:28:37,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:28:37,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:28:37,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:28:37,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:28:37,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:28:37,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:28:37,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:28:37,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:28:37,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:28:37,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:28:37,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:28:37,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:28:37,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:28:37,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:28:37,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:28:37,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:28:37,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:28:37,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:28:37,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:28:37,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:28:37,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:28:37,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:28:37,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:28:37,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:28:37,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:28:37,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:28:37,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:28:37,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:28:37,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:28:37,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:28:37,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:28:37,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:28:37,935 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 12:28:37,955 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:28:37,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:28:37,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:28:37,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:28:37,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:28:37,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:28:37,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:28:37,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:28:37,965 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:28:37,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:28:37,965 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:28:37,965 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:28:37,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:28:37,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:28:37,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:28:37,966 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 12:28:37,966 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 12:28:37,966 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 12:28:37,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:28:37,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 12:28:37,967 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:28:37,967 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:28:37,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:28:37,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:28:37,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:28:37,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:28:37,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:28:37,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:28:37,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:28:37,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:28:37,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:28:37,969 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:28:37,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:28:37,969 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:28:37,969 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_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2022-12-13 12:28:38,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:28:38,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:28:38,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:28:38,186 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:28:38,186 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:28:38,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-12-13 12:28:40,819 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:28:41,014 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:28:41,015 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-12-13 12:28:41,027 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/data/d7a7f53da/e03041c42f4846cfb223848935d1da9f/FLAGbc3d7b313 [2022-12-13 12:28:41,038 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/data/d7a7f53da/e03041c42f4846cfb223848935d1da9f [2022-12-13 12:28:41,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:28:41,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:28:41,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:28:41,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:28:41,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:28:41,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe66289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41, skipping insertion in model container [2022-12-13 12:28:41,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:28:41,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:28:41,345 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_6e34203d-71a4-49b7-8997-cc23f8c6ea12/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-12-13 12:28:41,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:28:41,362 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:28:41,392 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_6e34203d-71a4-49b7-8997-cc23f8c6ea12/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-12-13 12:28:41,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:28:41,423 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:28:41,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41 WrapperNode [2022-12-13 12:28:41,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:28:41,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:28:41,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:28:41,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:28:41,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,462 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2022-12-13 12:28:41,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:28:41,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:28:41,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:28:41,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:28:41,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:28:41,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:28:41,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:28:41,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:28:41,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (1/1) ... [2022-12-13 12:28:41,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:28:41,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:28:41,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:28:41,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e34203d-71a4-49b7-8997-cc23f8c6ea12/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:28:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 12:28:41,553 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 12:28:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:28:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:28:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:28:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:28:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:28:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:28:41,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:28:41,555 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:28:41,655 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:28:41,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:28:41,749 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:28:41,780 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:28:41,780 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 12:28:41,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:28:41 BoogieIcfgContainer [2022-12-13 12:28:41,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:28:41,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:28:41,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:28:41,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:28:41,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:28:41" (1/3) ... [2022-12-13 12:28:41,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43cd0cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:28:41, skipping insertion in model container [2022-12-13 12:28:41,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:28:41" (2/3) ... [2022-12-13 12:28:41,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43cd0cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:28:41, skipping insertion in model container [2022-12-13 12:28:41,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:28:41" (3/3) ... [2022-12-13 12:28:41,789 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2022-12-13 12:28:41,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:28:41,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-13 12:28:41,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:28:41,835 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:28:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 101 flow [2022-12-13 12:28:41,883 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-12-13 12:28:41,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:41,888 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. [2022-12-13 12:28:41,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 101 flow [2022-12-13 12:28:41,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 48 transitions, 101 flow [2022-12-13 12:28:41,894 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:28:41,902 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 48 transitions, 101 flow [2022-12-13 12:28:41,904 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 48 transitions, 101 flow [2022-12-13 12:28:41,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 101 flow [2022-12-13 12:28:41,928 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-12-13 12:28:41,929 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:41,929 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. [2022-12-13 12:28:41,930 INFO L119 LiptonReduction]: Number of co-enabled transitions 456 [2022-12-13 12:28:42,992 INFO L134 LiptonReduction]: Checked pairs total: 427 [2022-12-13 12:28:42,992 INFO L136 LiptonReduction]: Total number of compositions: 50 [2022-12-13 12:28:43,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:28:43,014 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:28:43,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 12:28:43,016 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 12:28:43,016 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:43,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:43,017 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:43,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 12:28:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:43,023 INFO L85 PathProgramCache]: Analyzing trace with hash 8082, now seen corresponding path program 1 times [2022-12-13 12:28:43,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:43,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496056654] [2022-12-13 12:28:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:43,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:43,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496056654] [2022-12-13 12:28:43,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496056654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:43,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:43,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119185530] [2022-12-13 12:28:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:43,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:43,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:43,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2022-12-13 12:28:43,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 27 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) [2022-12-13 12:28:43,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:43,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2022-12-13 12:28:43,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:43,298 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2022-12-13 12:28:43,298 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:43,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2022-12-13 12:28:43,299 INFO L137 encePairwiseOnDemand]: 93/98 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2022-12-13 12:28:43,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2022-12-13 12:28:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2022-12-13 12:28:43,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2022-12-13 12:28:43,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2022-12-13 12:28:43,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2022-12-13 12:28:43,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:43,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2022-12-13 12:28:43,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:43,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:43,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:43,321 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 27 flow. Second operand 3 states and 121 transitions. [2022-12-13 12:28:43,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2022-12-13 12:28:43,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 12:28:43,325 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2022-12-13 12:28:43,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, 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=12, PETRI_TRANSITIONS=7} [2022-12-13 12:28:43,330 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2022-12-13 12:28:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2022-12-13 12:28:43,330 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) [2022-12-13 12:28:43,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:43,330 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:43,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:28:43,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 12:28:43,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash 8081, now seen corresponding path program 1 times [2022-12-13 12:28:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378535060] [2022-12-13 12:28:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:43,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378535060] [2022-12-13 12:28:43,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378535060] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:43,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:43,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060959679] [2022-12-13 12:28:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:43,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 98 [2022-12-13 12:28:43,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 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) [2022-12-13 12:28:43,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:43,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 98 [2022-12-13 12:28:43,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:43,409 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-13 12:28:43,409 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:43,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 22. Up to 10 conditions per place. [2022-12-13 12:28:43,410 INFO L137 encePairwiseOnDemand]: 96/98 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2022-12-13 12:28:43,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2022-12-13 12:28:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2022-12-13 12:28:43,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2022-12-13 12:28:43,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2022-12-13 12:28:43,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2022-12-13 12:28:43,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:43,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2022-12-13 12:28:43,413 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) [2022-12-13 12:28:43,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:43,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:43,414 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 111 transitions. [2022-12-13 12:28:43,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2022-12-13 12:28:43,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:43,415 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2022-12-13 12:28:43,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, 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=12, PETRI_TRANSITIONS=6} [2022-12-13 12:28:43,416 INFO L288 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2022-12-13 12:28:43,416 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2022-12-13 12:28:43,417 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) [2022-12-13 12:28:43,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:43,417 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 12:28:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:28:43,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-12-13 12:28:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:43,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1122544804, now seen corresponding path program 1 times [2022-12-13 12:28:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:43,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229746243] [2022-12-13 12:28:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:43,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:28:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:43,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:28:43,464 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:28:43,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 12:28:43,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2022-12-13 12:28:43,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-12-13 12:28:43,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-12-13 12:28:43,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-12-13 12:28:43,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-12-13 12:28:43,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 12:28:43,469 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 12:28:43,472 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:28:43,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 12:28:43,483 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:28:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2022-12-13 12:28:43,502 INFO L130 PetriNetUnfolder]: 5/95 cut-off events. [2022-12-13 12:28:43,502 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:28:43,503 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 203 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. [2022-12-13 12:28:43,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 134 flow [2022-12-13 12:28:43,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 134 flow [2022-12-13 12:28:43,504 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:28:43,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 134 flow [2022-12-13 12:28:43,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 134 flow [2022-12-13 12:28:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 134 flow [2022-12-13 12:28:43,519 INFO L130 PetriNetUnfolder]: 5/95 cut-off events. [2022-12-13 12:28:43,519 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 12:28:43,520 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 203 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. [2022-12-13 12:28:43,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2022-12-13 12:28:44,310 INFO L134 LiptonReduction]: Checked pairs total: 3669 [2022-12-13 12:28:44,310 INFO L136 LiptonReduction]: Total number of compositions: 48 [2022-12-13 12:28:44,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:28:44,314 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:28:44,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 12:28:44,315 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 12:28:44,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:44,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:44,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:44,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 12:28:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 11992, now seen corresponding path program 1 times [2022-12-13 12:28:44,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:44,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841290485] [2022-12-13 12:28:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841290485] [2022-12-13 12:28:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841290485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:44,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:44,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:44,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508865487] [2022-12-13 12:28:44,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:44,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:44,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:44,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:44,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:44,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 109 [2022-12-13 12:28:44,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 62 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) [2022-12-13 12:28:44,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:44,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 109 [2022-12-13 12:28:44,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:44,429 INFO L130 PetriNetUnfolder]: 86/220 cut-off events. [2022-12-13 12:28:44,430 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-13 12:28:44,430 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 1157 event pairs, 86 based on Foata normal form. 12/178 useless extension candidates. Maximal degree in co-relation 103. Up to 164 conditions per place. [2022-12-13 12:28:44,431 INFO L137 encePairwiseOnDemand]: 104/109 looper letters, 11 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2022-12-13 12:28:44,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 76 flow [2022-12-13 12:28:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 151 transitions. [2022-12-13 12:28:44,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4617737003058104 [2022-12-13 12:28:44,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 151 transitions. [2022-12-13 12:28:44,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 151 transitions. [2022-12-13 12:28:44,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:44,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 151 transitions. [2022-12-13 12:28:44,433 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) [2022-12-13 12:28:44,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:44,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:44,434 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 62 flow. Second operand 3 states and 151 transitions. [2022-12-13 12:28:44,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 76 flow [2022-12-13 12:28:44,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 74 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 12:28:44,435 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 52 flow [2022-12-13 12:28:44,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, 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} [2022-12-13 12:28:44,436 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2022-12-13 12:28:44,436 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 52 flow [2022-12-13 12:28:44,436 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) [2022-12-13 12:28:44,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:44,436 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:44,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:28:44,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 12:28:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash 11990, now seen corresponding path program 1 times [2022-12-13 12:28:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:44,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822727288] [2022-12-13 12:28:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:44,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:44,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:44,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822727288] [2022-12-13 12:28:44,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822727288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:44,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:44,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225930528] [2022-12-13 12:28:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:44,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 109 [2022-12-13 12:28:44,475 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) [2022-12-13 12:28:44,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:44,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 109 [2022-12-13 12:28:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:44,503 INFO L130 PetriNetUnfolder]: 51/145 cut-off events. [2022-12-13 12:28:44,503 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 12:28:44,503 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 685 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. [2022-12-13 12:28:44,504 INFO L137 encePairwiseOnDemand]: 107/109 looper letters, 10 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 12:28:44,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 72 flow [2022-12-13 12:28:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2022-12-13 12:28:44,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43119266055045874 [2022-12-13 12:28:44,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2022-12-13 12:28:44,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2022-12-13 12:28:44,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:44,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2022-12-13 12:28:44,506 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) [2022-12-13 12:28:44,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:44,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:44,507 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 52 flow. Second operand 3 states and 141 transitions. [2022-12-13 12:28:44,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 72 flow [2022-12-13 12:28:44,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 71 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:44,508 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2022-12-13 12:28:44,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, 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} [2022-12-13 12:28:44,508 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2022-12-13 12:28:44,508 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2022-12-13 12:28:44,508 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) [2022-12-13 12:28:44,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:44,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:44,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 12:28:44,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 12:28:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -22413127, now seen corresponding path program 1 times [2022-12-13 12:28:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:44,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623925899] [2022-12-13 12:28:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:44,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623925899] [2022-12-13 12:28:44,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623925899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:44,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:44,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:28:44,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708551817] [2022-12-13 12:28:44,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:44,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:44,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:44,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 109 [2022-12-13 12:28:44,546 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) [2022-12-13 12:28:44,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:44,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 109 [2022-12-13 12:28:44,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:44,587 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2022-12-13 12:28:44,587 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 12:28:44,588 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 1023 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. [2022-12-13 12:28:44,589 INFO L137 encePairwiseOnDemand]: 102/109 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2022-12-13 12:28:44,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 130 flow [2022-12-13 12:28:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2022-12-13 12:28:44,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4709480122324159 [2022-12-13 12:28:44,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2022-12-13 12:28:44,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2022-12-13 12:28:44,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:44,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2022-12-13 12:28:44,592 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) [2022-12-13 12:28:44,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:44,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:44,593 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 51 flow. Second operand 3 states and 154 transitions. [2022-12-13 12:28:44,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 130 flow [2022-12-13 12:28:44,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:44,594 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 90 flow [2022-12-13 12:28:44,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, 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} [2022-12-13 12:28:44,594 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2022-12-13 12:28:44,594 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 90 flow [2022-12-13 12:28:44,594 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) [2022-12-13 12:28:44,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:44,595 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 12:28:44,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 12:28:44,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 12:28:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash -765399073, now seen corresponding path program 1 times [2022-12-13 12:28:44,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:44,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143655413] [2022-12-13 12:28:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:44,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:44,607 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:28:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:44,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:28:44,618 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:28:44,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 12:28:44,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2022-12-13 12:28:44,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 12:28:44,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 12:28:44,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2022-12-13 12:28:44,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 12:28:44,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 12:28:44,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 12:28:44,619 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 12:28:44,620 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:28:44,620 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 12:28:44,633 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:28:44,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 169 flow [2022-12-13 12:28:44,645 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2022-12-13 12:28:44,645 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 12:28:44,646 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 296 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. [2022-12-13 12:28:44,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 169 flow [2022-12-13 12:28:44,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 74 transitions, 169 flow [2022-12-13 12:28:44,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:28:44,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 74 transitions, 169 flow [2022-12-13 12:28:44,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 74 transitions, 169 flow [2022-12-13 12:28:44,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 169 flow [2022-12-13 12:28:44,658 INFO L130 PetriNetUnfolder]: 7/126 cut-off events. [2022-12-13 12:28:44,658 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 12:28:44,658 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 296 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. [2022-12-13 12:28:44,659 INFO L119 LiptonReduction]: Number of co-enabled transitions 2304 [2022-12-13 12:28:45,600 INFO L134 LiptonReduction]: Checked pairs total: 8984 [2022-12-13 12:28:45,600 INFO L136 LiptonReduction]: Total number of compositions: 57 [2022-12-13 12:28:45,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:28:45,603 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:28:45,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 12:28:45,604 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 12:28:45,604 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:45,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:45,604 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:45,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:28:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash 16602, now seen corresponding path program 1 times [2022-12-13 12:28:45,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:45,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585406722] [2022-12-13 12:28:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:45,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:45,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585406722] [2022-12-13 12:28:45,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585406722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:45,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:45,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088333270] [2022-12-13 12:28:45,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:45,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 131 [2022-12-13 12:28:45,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:45,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 131 [2022-12-13 12:28:45,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:45,732 INFO L130 PetriNetUnfolder]: 450/952 cut-off events. [2022-12-13 12:28:45,733 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-12-13 12:28:45,734 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. 171/1002 useless extension candidates. Maximal degree in co-relation 348. Up to 705 conditions per place. [2022-12-13 12:28:45,742 INFO L137 encePairwiseOnDemand]: 124/131 looper letters, 14 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-12-13 12:28:45,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 105 flow [2022-12-13 12:28:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2022-12-13 12:28:45,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45038167938931295 [2022-12-13 12:28:45,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2022-12-13 12:28:45,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2022-12-13 12:28:45,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:45,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2022-12-13 12:28:45,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,746 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 3 states and 177 transitions. [2022-12-13 12:28:45,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 105 flow [2022-12-13 12:28:45,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 99 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 12:28:45,748 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 71 flow [2022-12-13 12:28:45,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, 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} [2022-12-13 12:28:45,748 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2022-12-13 12:28:45,748 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 71 flow [2022-12-13 12:28:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:45,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:45,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 12:28:45,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:28:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 16601, now seen corresponding path program 1 times [2022-12-13 12:28:45,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:45,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128108152] [2022-12-13 12:28:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:45,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128108152] [2022-12-13 12:28:45,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128108152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:45,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:45,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:45,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841838524] [2022-12-13 12:28:45,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:45,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:45,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:45,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 131 [2022-12-13 12:28:45,781 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) [2022-12-13 12:28:45,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:45,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 131 [2022-12-13 12:28:45,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:45,841 INFO L130 PetriNetUnfolder]: 279/633 cut-off events. [2022-12-13 12:28:45,842 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 12:28:45,842 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 4097 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. [2022-12-13 12:28:45,844 INFO L137 encePairwiseOnDemand]: 129/131 looper letters, 13 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-12-13 12:28:45,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 97 flow [2022-12-13 12:28:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2022-12-13 12:28:45,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42748091603053434 [2022-12-13 12:28:45,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2022-12-13 12:28:45,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2022-12-13 12:28:45,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:45,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2022-12-13 12:28:45,847 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) [2022-12-13 12:28:45,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:45,848 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 71 flow. Second operand 3 states and 168 transitions. [2022-12-13 12:28:45,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 97 flow [2022-12-13 12:28:45,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:45,849 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 70 flow [2022-12-13 12:28:45,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, 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} [2022-12-13 12:28:45,849 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2022-12-13 12:28:45,850 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 70 flow [2022-12-13 12:28:45,850 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) [2022-12-13 12:28:45,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:45,850 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:45,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 12:28:45,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:28:45,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1086121986, now seen corresponding path program 1 times [2022-12-13 12:28:45,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:45,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477419657] [2022-12-13 12:28:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:45,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477419657] [2022-12-13 12:28:45,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477419657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:45,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:45,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:28:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472111922] [2022-12-13 12:28:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:45,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 131 [2022-12-13 12:28:45,883 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) [2022-12-13 12:28:45,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:45,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 131 [2022-12-13 12:28:45,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:46,022 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2022-12-13 12:28:46,022 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 12:28:46,024 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 11475 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. [2022-12-13 12:28:46,029 INFO L137 encePairwiseOnDemand]: 121/131 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-12-13 12:28:46,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 180 flow [2022-12-13 12:28:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2022-12-13 12:28:46,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.455470737913486 [2022-12-13 12:28:46,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2022-12-13 12:28:46,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2022-12-13 12:28:46,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:46,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2022-12-13 12:28:46,031 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) [2022-12-13 12:28:46,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:46,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:46,032 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 70 flow. Second operand 3 states and 179 transitions. [2022-12-13 12:28:46,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 180 flow [2022-12-13 12:28:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 179 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:46,033 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 127 flow [2022-12-13 12:28:46,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, 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} [2022-12-13 12:28:46,033 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2022-12-13 12:28:46,033 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 127 flow [2022-12-13 12:28:46,033 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) [2022-12-13 12:28:46,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:46,034 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:46,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 12:28:46,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:28:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash -888131274, now seen corresponding path program 1 times [2022-12-13 12:28:46,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:46,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83728756] [2022-12-13 12:28:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:46,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:28:46,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:46,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83728756] [2022-12-13 12:28:46,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83728756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:46,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:46,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:28:46,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970491441] [2022-12-13 12:28:46,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:46,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:46,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 131 [2022-12-13 12:28:46,090 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) [2022-12-13 12:28:46,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:46,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 131 [2022-12-13 12:28:46,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:46,131 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2022-12-13 12:28:46,131 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-12-13 12:28:46,132 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 1138 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. [2022-12-13 12:28:46,133 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2022-12-13 12:28:46,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 135 flow [2022-12-13 12:28:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2022-12-13 12:28:46,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4707379134860051 [2022-12-13 12:28:46,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2022-12-13 12:28:46,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2022-12-13 12:28:46,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:46,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2022-12-13 12:28:46,135 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) [2022-12-13 12:28:46,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:46,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:46,137 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 127 flow. Second operand 3 states and 185 transitions. [2022-12-13 12:28:46,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 135 flow [2022-12-13 12:28:46,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:28:46,139 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 75 flow [2022-12-13 12:28:46,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, 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} [2022-12-13 12:28:46,140 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2022-12-13 12:28:46,140 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 75 flow [2022-12-13 12:28:46,140 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) [2022-12-13 12:28:46,140 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:46,140 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 12:28:46,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 12:28:46,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 12:28:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2029191772, now seen corresponding path program 1 times [2022-12-13 12:28:46,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:46,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409754883] [2022-12-13 12:28:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:46,153 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:28:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:46,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:28:46,163 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:28:46,163 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-12-13 12:28:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2022-12-13 12:28:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-12-13 12:28:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-12-13 12:28:46,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2022-12-13 12:28:46,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-12-13 12:28:46,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-12-13 12:28:46,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-12-13 12:28:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 12:28:46,164 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 12:28:46,165 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:28:46,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 12:28:46,179 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:28:46,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 87 transitions, 206 flow [2022-12-13 12:28:46,194 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2022-12-13 12:28:46,194 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 12:28:46,195 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 384 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. [2022-12-13 12:28:46,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 87 transitions, 206 flow [2022-12-13 12:28:46,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 87 transitions, 206 flow [2022-12-13 12:28:46,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:28:46,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 87 transitions, 206 flow [2022-12-13 12:28:46,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 87 transitions, 206 flow [2022-12-13 12:28:46,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 87 transitions, 206 flow [2022-12-13 12:28:46,209 INFO L130 PetriNetUnfolder]: 9/157 cut-off events. [2022-12-13 12:28:46,209 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 12:28:46,210 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 384 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. [2022-12-13 12:28:46,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 3696 [2022-12-13 12:28:47,079 INFO L134 LiptonReduction]: Checked pairs total: 15113 [2022-12-13 12:28:47,079 INFO L136 LiptonReduction]: Total number of compositions: 64 [2022-12-13 12:28:47,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:28:47,081 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:28:47,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-13 12:28:47,082 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 12:28:47,082 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:47,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:47,082 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:47,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 12:28:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash 21849, now seen corresponding path program 1 times [2022-12-13 12:28:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:47,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197845088] [2022-12-13 12:28:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:47,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197845088] [2022-12-13 12:28:47,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197845088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:47,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:47,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364105685] [2022-12-13 12:28:47,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:47,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 12:28:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 12:28:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:28:47,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2022-12-13 12:28:47,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 122 flow. Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:47,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2022-12-13 12:28:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:47,556 INFO L130 PetriNetUnfolder]: 3501/6123 cut-off events. [2022-12-13 12:28:47,556 INFO L131 PetriNetUnfolder]: For 1054/1054 co-relation queries the response was YES. [2022-12-13 12:28:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11648 conditions, 6123 events. 3501/6123 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 49318 event pairs, 3501 based on Foata normal form. 1250/6539 useless extension candidates. Maximal degree in co-relation 2395. Up to 4866 conditions per place. [2022-12-13 12:28:47,587 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 20 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2022-12-13 12:28:47,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 144 flow [2022-12-13 12:28:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 12:28:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 12:28:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2022-12-13 12:28:47,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5165562913907285 [2022-12-13 12:28:47,588 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2022-12-13 12:28:47,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2022-12-13 12:28:47,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:47,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2022-12-13 12:28:47,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,590 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,590 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 122 flow. Second operand 2 states and 156 transitions. [2022-12-13 12:28:47,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 144 flow [2022-12-13 12:28:47,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 36 transitions, 132 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 12:28:47,593 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 92 flow [2022-12-13 12:28:47,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2022-12-13 12:28:47,593 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2022-12-13 12:28:47,593 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 92 flow [2022-12-13 12:28:47,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:47,594 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:47,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 12:28:47,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 12:28:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash 21841, now seen corresponding path program 1 times [2022-12-13 12:28:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:47,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641700894] [2022-12-13 12:28:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:47,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641700894] [2022-12-13 12:28:47,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641700894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:47,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:47,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:47,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671877775] [2022-12-13 12:28:47,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:47,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:47,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:47,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 151 [2022-12-13 12:28:47,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 92 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) [2022-12-13 12:28:47,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:47,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 151 [2022-12-13 12:28:47,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:47,971 INFO L130 PetriNetUnfolder]: 2562/4587 cut-off events. [2022-12-13 12:28:47,971 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 12:28:47,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8497 conditions, 4587 events. 2562/4587 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36271 event pairs, 2562 based on Foata normal form. 0/4095 useless extension candidates. Maximal degree in co-relation 8490. Up to 3585 conditions per place. [2022-12-13 12:28:47,990 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 18 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2022-12-13 12:28:47,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 35 transitions, 128 flow [2022-12-13 12:28:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-12-13 12:28:47,992 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.434878587196468 [2022-12-13 12:28:47,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-12-13 12:28:47,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-12-13 12:28:47,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:47,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-12-13 12:28:47,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:47,993 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 92 flow. Second operand 3 states and 197 transitions. [2022-12-13 12:28:47,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 35 transitions, 128 flow [2022-12-13 12:28:47,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 35 transitions, 128 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 12:28:47,995 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 92 flow [2022-12-13 12:28:47,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2022-12-13 12:28:47,995 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2022-12-13 12:28:47,995 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 92 flow [2022-12-13 12:28:47,996 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) [2022-12-13 12:28:47,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:47,996 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:47,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 12:28:47,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 12:28:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash 21839, now seen corresponding path program 1 times [2022-12-13 12:28:47,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:47,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643633455] [2022-12-13 12:28:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:47,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:48,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643633455] [2022-12-13 12:28:48,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643633455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:48,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:48,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790707927] [2022-12-13 12:28:48,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:48,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:48,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:48,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2022-12-13 12:28:48,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 92 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) [2022-12-13 12:28:48,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:48,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2022-12-13 12:28:48,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:48,266 INFO L130 PetriNetUnfolder]: 1623/3051 cut-off events. [2022-12-13 12:28:48,266 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 12:28:48,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5683 conditions, 3051 events. 1623/3051 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23211 event pairs, 1623 based on Foata normal form. 0/2901 useless extension candidates. Maximal degree in co-relation 5675. Up to 2305 conditions per place. [2022-12-13 12:28:48,280 INFO L137 encePairwiseOnDemand]: 149/151 looper letters, 17 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2022-12-13 12:28:48,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 34 transitions, 126 flow [2022-12-13 12:28:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2022-12-13 12:28:48,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.445916114790287 [2022-12-13 12:28:48,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2022-12-13 12:28:48,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2022-12-13 12:28:48,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:48,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2022-12-13 12:28:48,284 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) [2022-12-13 12:28:48,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:48,284 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:48,285 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 92 flow. Second operand 3 states and 202 transitions. [2022-12-13 12:28:48,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 34 transitions, 126 flow [2022-12-13 12:28:48,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:48,286 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 91 flow [2022-12-13 12:28:48,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=91, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2022-12-13 12:28:48,286 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2022-12-13 12:28:48,286 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 91 flow [2022-12-13 12:28:48,286 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) [2022-12-13 12:28:48,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:48,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:48,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 12:28:48,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 12:28:48,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1244294920, now seen corresponding path program 1 times [2022-12-13 12:28:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275363798] [2022-12-13 12:28:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:48,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:48,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275363798] [2022-12-13 12:28:48,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275363798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:48,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:48,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:28:48,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733694372] [2022-12-13 12:28:48,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:48,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:48,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:48,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 151 [2022-12-13 12:28:48,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 91 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) [2022-12-13 12:28:48,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:48,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 151 [2022-12-13 12:28:48,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:49,354 INFO L130 PetriNetUnfolder]: 10745/16935 cut-off events. [2022-12-13 12:28:49,354 INFO L131 PetriNetUnfolder]: For 913/913 co-relation queries the response was YES. [2022-12-13 12:28:49,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33439 conditions, 16935 events. 10745/16935 cut-off events. For 913/913 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 130782 event pairs, 5857 based on Foata normal form. 2212/18634 useless extension candidates. Maximal degree in co-relation 33431. Up to 9097 conditions per place. [2022-12-13 12:28:49,416 INFO L137 encePairwiseOnDemand]: 137/151 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2022-12-13 12:28:49,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 240 flow [2022-12-13 12:28:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2022-12-13 12:28:49,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45916114790286977 [2022-12-13 12:28:49,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2022-12-13 12:28:49,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2022-12-13 12:28:49,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:49,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2022-12-13 12:28:49,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:49,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:49,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:49,420 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 91 flow. Second operand 3 states and 208 transitions. [2022-12-13 12:28:49,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 240 flow [2022-12-13 12:28:49,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:49,422 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 168 flow [2022-12-13 12:28:49,423 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2022-12-13 12:28:49,423 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2022-12-13 12:28:49,423 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 168 flow [2022-12-13 12:28:49,423 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) [2022-12-13 12:28:49,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:49,423 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:49,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 12:28:49,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 12:28:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -657501346, now seen corresponding path program 1 times [2022-12-13 12:28:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111651349] [2022-12-13 12:28:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:49,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:28:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:49,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111651349] [2022-12-13 12:28:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111651349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:49,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:49,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:28:49,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233118493] [2022-12-13 12:28:49,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:49,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:49,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 151 [2022-12-13 12:28:49,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 168 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) [2022-12-13 12:28:49,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:49,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 151 [2022-12-13 12:28:49,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:49,580 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2022-12-13 12:28:49,580 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-12-13 12:28:49,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 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 4228 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 1449. Up to 164 conditions per place. [2022-12-13 12:28:49,583 INFO L137 encePairwiseOnDemand]: 143/151 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2022-12-13 12:28:49,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 175 flow [2022-12-13 12:28:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2022-12-13 12:28:49,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47240618101545256 [2022-12-13 12:28:49,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2022-12-13 12:28:49,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2022-12-13 12:28:49,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:49,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2022-12-13 12:28:49,587 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) [2022-12-13 12:28:49,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:49,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:49,589 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 168 flow. Second operand 3 states and 214 transitions. [2022-12-13 12:28:49,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 175 flow [2022-12-13 12:28:49,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:28:49,593 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 96 flow [2022-12-13 12:28:49,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=43, PETRI_TRANSITIONS=29} [2022-12-13 12:28:49,594 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2022-12-13 12:28:49,594 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 96 flow [2022-12-13 12:28:49,594 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) [2022-12-13 12:28:49,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:49,594 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:49,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 12:28:49,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 12:28:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1848032081, now seen corresponding path program 1 times [2022-12-13 12:28:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250378949] [2022-12-13 12:28:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:49,610 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:28:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:28:49,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:28:49,626 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:28:49,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-12-13 12:28:49,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2022-12-13 12:28:49,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-13 12:28:49,626 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-13 12:28:49,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2022-12-13 12:28:49,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2022-12-13 12:28:49,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2022-12-13 12:28:49,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2022-12-13 12:28:49,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-13 12:28:49,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 12:28:49,627 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-13 12:28:49,628 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:28:49,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 12:28:49,647 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:28:49,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 245 flow [2022-12-13 12:28:49,669 INFO L130 PetriNetUnfolder]: 11/188 cut-off events. [2022-12-13 12:28:49,669 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 12:28:49,670 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 475 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. [2022-12-13 12:28:49,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 100 transitions, 245 flow [2022-12-13 12:28:49,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 245 flow [2022-12-13 12:28:49,672 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:28:49,672 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 245 flow [2022-12-13 12:28:49,672 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 245 flow [2022-12-13 12:28:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 245 flow [2022-12-13 12:28:49,692 INFO L130 PetriNetUnfolder]: 11/188 cut-off events. [2022-12-13 12:28:49,693 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 12:28:49,694 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 475 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. [2022-12-13 12:28:49,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2022-12-13 12:28:50,736 INFO L134 LiptonReduction]: Checked pairs total: 23628 [2022-12-13 12:28:50,737 INFO L136 LiptonReduction]: Total number of compositions: 73 [2022-12-13 12:28:50,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:28:50,738 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:28:50,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 12:28:50,739 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 12:28:50,740 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:28:50,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:50,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:50,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 12:28:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash 27795, now seen corresponding path program 1 times [2022-12-13 12:28:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942574686] [2022-12-13 12:28:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942574686] [2022-12-13 12:28:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942574686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:50,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:50,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723841543] [2022-12-13 12:28:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:50,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 173 [2022-12-13 12:28:50,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 153 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) [2022-12-13 12:28:50,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:50,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 173 [2022-12-13 12:28:50,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:52,283 INFO L130 PetriNetUnfolder]: 13314/21416 cut-off events. [2022-12-13 12:28:52,283 INFO L131 PetriNetUnfolder]: For 6750/6750 co-relation queries the response was YES. [2022-12-13 12:28:52,306 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 181563 event pairs, 13314 based on Foata normal form. 4779/24234 useless extension candidates. Maximal degree in co-relation 8972. Up to 17409 conditions per place. [2022-12-13 12:28:52,372 INFO L137 encePairwiseOnDemand]: 164/173 looper letters, 22 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-12-13 12:28:52,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 173 flow [2022-12-13 12:28:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2022-12-13 12:28:52,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44701348747591524 [2022-12-13 12:28:52,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2022-12-13 12:28:52,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2022-12-13 12:28:52,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:52,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2022-12-13 12:28:52,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:52,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:52,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:52,377 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 153 flow. Second operand 3 states and 232 transitions. [2022-12-13 12:28:52,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 173 flow [2022-12-13 12:28:52,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 153 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-12-13 12:28:52,384 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 109 flow [2022-12-13 12:28:52,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, 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} [2022-12-13 12:28:52,385 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2022-12-13 12:28:52,385 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 109 flow [2022-12-13 12:28:52,385 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) [2022-12-13 12:28:52,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:52,385 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:28:52,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 12:28:52,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 12:28:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 27797, now seen corresponding path program 1 times [2022-12-13 12:28:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:52,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276137481] [2022-12-13 12:28:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276137481] [2022-12-13 12:28:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276137481] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:52,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:52,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:28:52,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676450966] [2022-12-13 12:28:52,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:52,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:52,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:52,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 173 [2022-12-13 12:28:52,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 109 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) [2022-12-13 12:28:52,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:52,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 173 [2022-12-13 12:28:52,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:53,754 INFO L130 PetriNetUnfolder]: 8535/14249 cut-off events. [2022-12-13 12:28:53,754 INFO L131 PetriNetUnfolder]: For 850/850 co-relation queries the response was YES. [2022-12-13 12:28:53,769 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 119138 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. [2022-12-13 12:28:53,807 INFO L137 encePairwiseOnDemand]: 171/173 looper letters, 21 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 12:28:53,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 40 transitions, 151 flow [2022-12-13 12:28:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:28:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:28:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2022-12-13 12:28:53,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44315992292870904 [2022-12-13 12:28:53,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2022-12-13 12:28:53,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2022-12-13 12:28:53,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:28:53,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2022-12-13 12:28:53,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:53,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:53,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:28:53,810 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 109 flow. Second operand 3 states and 230 transitions. [2022-12-13 12:28:53,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 40 transitions, 151 flow [2022-12-13 12:28:53,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 40 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:28:53,812 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 108 flow [2022-12-13 12:28:53,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, 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} [2022-12-13 12:28:53,812 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2022-12-13 12:28:53,812 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 108 flow [2022-12-13 12:28:53,813 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) [2022-12-13 12:28:53,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:53,813 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:53,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 12:28:53,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 12:28:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1934810040, now seen corresponding path program 1 times [2022-12-13 12:28:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:53,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954783577] [2022-12-13 12:28:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954783577] [2022-12-13 12:28:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954783577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:28:53,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:28:53,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:28:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059341358] [2022-12-13 12:28:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:28:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:28:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:28:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:28:53,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 173 [2022-12-13 12:28:53,851 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) [2022-12-13 12:28:53,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:53,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 173 [2022-12-13 12:28:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:01,201 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2022-12-13 12:29:01,201 INFO L131 PetriNetUnfolder]: For 5676/5676 co-relation queries the response was YES. [2022-12-13 12:29:01,417 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 971260 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. [2022-12-13 12:29:01,777 INFO L137 encePairwiseOnDemand]: 157/173 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2022-12-13 12:29:01,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 292 flow [2022-12-13 12:29:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:29:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:29:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-12-13 12:29:01,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4489402697495183 [2022-12-13 12:29:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-12-13 12:29:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-12-13 12:29:01,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-12-13 12:29:01,781 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) [2022-12-13 12:29:01,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:01,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:01,783 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 108 flow. Second operand 3 states and 233 transitions. [2022-12-13 12:29:01,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 292 flow [2022-12-13 12:29:01,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:29:01,797 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 201 flow [2022-12-13 12:29:01,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, 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} [2022-12-13 12:29:01,797 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2022-12-13 12:29:01,798 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 201 flow [2022-12-13 12:29:01,798 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) [2022-12-13 12:29:01,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:01,798 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 12:29:01,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 12:29:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash -275893607, now seen corresponding path program 1 times [2022-12-13 12:29:01,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:29:01,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785046561] [2022-12-13 12:29:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:29:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:29:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:29:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785046561] [2022-12-13 12:29:01,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785046561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:29:01,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:29:01,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:29:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573921273] [2022-12-13 12:29:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:29:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:29:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:29:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:29:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:29:01,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2022-12-13 12:29:01,845 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) [2022-12-13 12:29:01,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:01,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2022-12-13 12:29:01,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:01,957 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2022-12-13 12:29:01,957 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-12-13 12:29:01,959 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 13544 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. [2022-12-13 12:29:01,961 INFO L137 encePairwiseOnDemand]: 163/173 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2022-12-13 12:29:01,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 215 flow [2022-12-13 12:29:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:29:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:29:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2022-12-13 12:29:01,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4682080924855491 [2022-12-13 12:29:01,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2022-12-13 12:29:01,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2022-12-13 12:29:01,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:01,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2022-12-13 12:29:01,964 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) [2022-12-13 12:29:01,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:01,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:01,964 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 201 flow. Second operand 3 states and 243 transitions. [2022-12-13 12:29:01,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 215 flow [2022-12-13 12:29:01,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:29:01,968 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 117 flow [2022-12-13 12:29:01,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, 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} [2022-12-13 12:29:01,969 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, -10 predicate places. [2022-12-13 12:29:01,969 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 117 flow [2022-12-13 12:29:01,969 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) [2022-12-13 12:29:01,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:01,969 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:01,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 12:29:01,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-12-13 12:29:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1488527291, now seen corresponding path program 1 times [2022-12-13 12:29:01,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:29:01,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591502186] [2022-12-13 12:29:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:01,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:29:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:29:01,978 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:29:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:29:01,986 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:29:01,986 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-12-13 12:29:01,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-12-13 12:29:01,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-12-13 12:29:01,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-12-13 12:29:01,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 12:29:01,988 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 12:29:01,988 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:29:01,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-12-13 12:29:02,002 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:29:02,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 113 transitions, 286 flow [2022-12-13 12:29:02,015 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2022-12-13 12:29:02,016 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 12:29:02,016 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 563 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. [2022-12-13 12:29:02,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 113 transitions, 286 flow [2022-12-13 12:29:02,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 113 transitions, 286 flow [2022-12-13 12:29:02,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:29:02,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 113 transitions, 286 flow [2022-12-13 12:29:02,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 113 transitions, 286 flow [2022-12-13 12:29:02,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 113 transitions, 286 flow [2022-12-13 12:29:02,030 INFO L130 PetriNetUnfolder]: 13/219 cut-off events. [2022-12-13 12:29:02,030 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 12:29:02,031 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 563 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. [2022-12-13 12:29:02,034 INFO L119 LiptonReduction]: Number of co-enabled transitions 7416 [2022-12-13 12:29:03,119 INFO L134 LiptonReduction]: Checked pairs total: 32088 [2022-12-13 12:29:03,119 INFO L136 LiptonReduction]: Total number of compositions: 78 [2022-12-13 12:29:03,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:29:03,121 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:29:03,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-13 12:29:03,122 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 12:29:03,122 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:29:03,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:03,122 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:29:03,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 12:29:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash 34318, now seen corresponding path program 1 times [2022-12-13 12:29:03,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:29:03,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146552322] [2022-12-13 12:29:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:29:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:29:03,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146552322] [2022-12-13 12:29:03,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146552322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:29:03,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:29:03,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:29:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980962080] [2022-12-13 12:29:03,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:29:03,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:29:03,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:29:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:29:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:29:03,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 191 [2022-12-13 12:29:03,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:03,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:03,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 191 [2022-12-13 12:29:03,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:11,553 INFO L130 PetriNetUnfolder]: 79106/112488 cut-off events. [2022-12-13 12:29:11,553 INFO L131 PetriNetUnfolder]: For 39518/39518 co-relation queries the response was YES. [2022-12-13 12:29:11,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226303 conditions, 112488 events. 79106/112488 cut-off events. For 39518/39518 co-relation queries the response was YES. Maximal size of possible extension queue 5916. Compared 937614 event pairs, 79106 based on Foata normal form. 23339/122922 useless extension candidates. Maximal degree in co-relation 49276. Up to 98561 conditions per place. [2022-12-13 12:29:12,217 INFO L137 encePairwiseOnDemand]: 182/191 looper letters, 27 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 12:29:12,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2022-12-13 12:29:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:29:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:29:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2022-12-13 12:29:12,220 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4607329842931937 [2022-12-13 12:29:12,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2022-12-13 12:29:12,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2022-12-13 12:29:12,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:12,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2022-12-13 12:29:12,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,224 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 182 flow. Second operand 3 states and 264 transitions. [2022-12-13 12:29:12,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2022-12-13 12:29:12,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 186 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-12-13 12:29:12,277 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 132 flow [2022-12-13 12:29:12,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2022-12-13 12:29:12,278 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2022-12-13 12:29:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 132 flow [2022-12-13 12:29:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:12,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:12,278 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:29:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 12:29:12,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 12:29:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 34317, now seen corresponding path program 1 times [2022-12-13 12:29:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:29:12,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569890726] [2022-12-13 12:29:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:29:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:12,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:29:12,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569890726] [2022-12-13 12:29:12,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569890726] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:29:12,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:29:12,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:29:12,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905137776] [2022-12-13 12:29:12,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:29:12,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:29:12,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:29:12,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:29:12,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:29:12,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 191 [2022-12-13 12:29:12,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 132 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) [2022-12-13 12:29:12,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:12,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 191 [2022-12-13 12:29:12,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:29:17,629 INFO L130 PetriNetUnfolder]: 51031/74537 cut-off events. [2022-12-13 12:29:17,629 INFO L131 PetriNetUnfolder]: For 3410/3410 co-relation queries the response was YES. [2022-12-13 12:29:17,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143666 conditions, 74537 events. 51031/74537 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 3970. Compared 619050 event pairs, 51031 based on Foata normal form. 0/69461 useless extension candidates. Maximal degree in co-relation 143654. Up to 64001 conditions per place. [2022-12-13 12:29:18,087 INFO L137 encePairwiseOnDemand]: 189/191 looper letters, 26 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2022-12-13 12:29:18,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 184 flow [2022-12-13 12:29:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:29:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:29:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2022-12-13 12:29:18,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44153577661431065 [2022-12-13 12:29:18,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2022-12-13 12:29:18,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2022-12-13 12:29:18,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:18,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2022-12-13 12:29:18,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:18,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:18,090 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:18,090 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 132 flow. Second operand 3 states and 253 transitions. [2022-12-13 12:29:18,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 184 flow [2022-12-13 12:29:18,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 49 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:29:18,103 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 131 flow [2022-12-13 12:29:18,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2022-12-13 12:29:18,104 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2022-12-13 12:29:18,104 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 131 flow [2022-12-13 12:29:18,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-12-13 12:29:18,104 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:18,104 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:18,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 12:29:18,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 12:29:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash -107245795, now seen corresponding path program 1 times [2022-12-13 12:29:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:29:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793283560] [2022-12-13 12:29:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:29:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:18,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:29:18,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793283560] [2022-12-13 12:29:18,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793283560] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:29:18,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:29:18,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:29:18,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177459872] [2022-12-13 12:29:18,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:29:18,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:29:18,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:29:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:29:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:29:18,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 191 [2022-12-13 12:29:18,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:18,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:29:18,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 191 [2022-12-13 12:29:18,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:48,186 INFO L130 PetriNetUnfolder]: 1011583/1331415 cut-off events. [2022-12-13 12:30:48,187 INFO L131 PetriNetUnfolder]: For 49289/49289 co-relation queries the response was YES. [2022-12-13 12:30:51,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2668514 conditions, 1331415 events. 1011583/1331415 cut-off events. For 49289/49289 co-relation queries the response was YES. Maximal size of possible extension queue 54254. Compared 11083017 event pairs, 548769 based on Foata normal form. 135242/1413507 useless extension candidates. Maximal degree in co-relation 2668501. Up to 691385 conditions per place. [2022-12-13 12:30:56,483 INFO L137 encePairwiseOnDemand]: 170/191 looper letters, 59 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2022-12-13 12:30:56,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 362 flow [2022-12-13 12:30:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:30:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:30:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2022-12-13 12:30:56,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4642233856893543 [2022-12-13 12:30:56,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2022-12-13 12:30:56,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2022-12-13 12:30:56,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:56,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2022-12-13 12:30:56,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:56,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:56,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:56,486 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 131 flow. Second operand 3 states and 266 transitions. [2022-12-13 12:30:56,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 362 flow [2022-12-13 12:30:58,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:30:58,229 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 246 flow [2022-12-13 12:30:58,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-12-13 12:30:58,229 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2022-12-13 12:30:58,229 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 246 flow [2022-12-13 12:30:58,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:58,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:58,230 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:58,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 12:30:58,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 12:30:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1653601369, now seen corresponding path program 1 times [2022-12-13 12:30:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:30:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479142936] [2022-12-13 12:30:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:30:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:30:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:30:58,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:30:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479142936] [2022-12-13 12:30:58,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479142936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:30:58,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:30:58,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:30:58,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762722562] [2022-12-13 12:30:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:30:58,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:30:58,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:30:58,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:30:58,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:30:58,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 191 [2022-12-13 12:30:58,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:58,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:58,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 191 [2022-12-13 12:30:58,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:58,590 INFO L130 PetriNetUnfolder]: 1061/4041 cut-off events. [2022-12-13 12:30:58,590 INFO L131 PetriNetUnfolder]: For 1153/1153 co-relation queries the response was YES. [2022-12-13 12:30:58,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 4041 events. 1061/4041 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 39645 event pairs, 579 based on Foata normal form. 1564/5476 useless extension candidates. Maximal degree in co-relation 9235. Up to 1188 conditions per place. [2022-12-13 12:30:58,603 INFO L137 encePairwiseOnDemand]: 179/191 looper letters, 15 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2022-12-13 12:30:58,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 47 transitions, 257 flow [2022-12-13 12:30:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:30:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:30:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2022-12-13 12:30:58,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47643979057591623 [2022-12-13 12:30:58,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2022-12-13 12:30:58,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2022-12-13 12:30:58,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:58,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2022-12-13 12:30:58,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:58,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:58,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:58,605 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 246 flow. Second operand 3 states and 273 transitions. [2022-12-13 12:30:58,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 47 transitions, 257 flow [2022-12-13 12:30:58,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 205 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:30:58,614 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 138 flow [2022-12-13 12:30:58,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=191, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2022-12-13 12:30:58,614 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2022-12-13 12:30:58,614 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 138 flow [2022-12-13 12:30:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:58,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:58,614 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:58,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 12:30:58,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 12:30:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1556452237, now seen corresponding path program 1 times [2022-12-13 12:30:58,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:30:58,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059615443] [2022-12-13 12:30:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:58,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:30:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:30:58,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 12:30:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 12:30:58,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 12:30:58,634 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 12:30:58,634 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2022-12-13 12:30:58,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2022-12-13 12:30:58,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-12-13 12:30:58,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-12-13 12:30:58,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2022-12-13 12:30:58,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2022-12-13 12:30:58,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2022-12-13 12:30:58,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2022-12-13 12:30:58,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2022-12-13 12:30:58,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2022-12-13 12:30:58,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-12-13 12:30:58,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 12:30:58,636 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 12:30:58,636 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 12:30:58,636 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-12-13 12:30:58,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 12:30:58,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 126 transitions, 329 flow [2022-12-13 12:30:58,681 INFO L130 PetriNetUnfolder]: 15/250 cut-off events. [2022-12-13 12:30:58,681 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 12:30:58,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 250 events. 15/250 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 663 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 245. Up to 16 conditions per place. [2022-12-13 12:30:58,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 126 transitions, 329 flow [2022-12-13 12:30:58,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 126 transitions, 329 flow [2022-12-13 12:30:58,684 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:30:58,684 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 126 transitions, 329 flow [2022-12-13 12:30:58,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 126 transitions, 329 flow [2022-12-13 12:30:58,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 126 transitions, 329 flow [2022-12-13 12:30:58,707 INFO L130 PetriNetUnfolder]: 15/250 cut-off events. [2022-12-13 12:30:58,707 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 12:30:58,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 250 events. 15/250 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 663 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 245. Up to 16 conditions per place. [2022-12-13 12:30:58,713 INFO L119 LiptonReduction]: Number of co-enabled transitions 9744 [2022-12-13 12:30:59,881 INFO L134 LiptonReduction]: Checked pairs total: 43156 [2022-12-13 12:30:59,881 INFO L136 LiptonReduction]: Total number of compositions: 88 [2022-12-13 12:30:59,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:30:59,883 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;@22840096, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:30:59,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 12:30:59,883 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-12-13 12:30:59,883 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:30:59,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:59,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:30:59,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 12:30:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash 41581, now seen corresponding path program 1 times [2022-12-13 12:30:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:30:59,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64502871] [2022-12-13 12:30:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:30:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:30:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:30:59,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64502871] [2022-12-13 12:30:59,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64502871] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:30:59,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:30:59,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:30:59,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625644194] [2022-12-13 12:30:59,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:30:59,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:30:59,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:30:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:30:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:30:59,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 214 [2022-12-13 12:30:59,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:59,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:59,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 214 [2022-12-13 12:30:59,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand