./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 01:49:05,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:49:05,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:49:05,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:49:05,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:49:05,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:49:05,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:49:05,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:49:05,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:49:05,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:49:05,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:49:05,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:49:05,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:49:05,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:49:05,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:49:05,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:49:05,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:49:05,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:49:05,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:49:05,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:49:05,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:49:05,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:49:05,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:49:05,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:49:05,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:49:05,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:49:05,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:49:05,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:49:05,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:49:05,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:49:05,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:49:05,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:49:05,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:49:05,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:49:05,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:49:05,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:49:05,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:49:05,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:49:05,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:49:05,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:49:05,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:49:05,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 01:49:05,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:49:05,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:49:05,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:49:05,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:49:05,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:49:05,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:49:05,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:49:05,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:49:05,747 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:49:05,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:49:05,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:49:05,748 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 01:49:05,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:49:05,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:49:05,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:49:05,749 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 01:49:05,749 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 01:49:05,749 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 01:49:05,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:49:05,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 01:49:05,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:49:05,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:49:05,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:49:05,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:49:05,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:49:05,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:49:05,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:49:05,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:49:05,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:49:05,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:49:05,752 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:49:05,752 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:49:05,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:49:05,752 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_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2022-11-23 01:49:05,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:49:06,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:49:06,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:49:06,007 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:49:06,007 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:49:06,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2022-11-23 01:49:09,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:49:09,447 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:49:09,448 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2022-11-23 01:49:09,459 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/data/a7b3ee6a1/6d77aaa73d2142eaabaf308ec0d7481b/FLAG225556b51 [2022-11-23 01:49:09,478 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/data/a7b3ee6a1/6d77aaa73d2142eaabaf308ec0d7481b [2022-11-23 01:49:09,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:49:09,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:49:09,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:49:09,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:49:09,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:49:09,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:09" (1/1) ... [2022-11-23 01:49:09,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66554a96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:09, skipping insertion in model container [2022-11-23 01:49:09,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:09" (1/1) ... [2022-11-23 01:49:09,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:49:09,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:49:09,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:49:09,982 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:49:10,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:49:10,096 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:49:10,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10 WrapperNode [2022-11-23 01:49:10,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:49:10,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:49:10,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:49:10,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:49:10,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,174 INFO L138 Inliner]: procedures = 262, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-23 01:49:10,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:49:10,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:49:10,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:49:10,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:49:10,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:49:10,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:49:10,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:49:10,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:49:10,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (1/1) ... [2022-11-23 01:49:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:49:10,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:10,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:49:10,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:49:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 01:49:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 01:49:10,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 01:49:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 01:49:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 01:49:10,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:49:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-23 01:49:10,333 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-23 01:49:10,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:49:10,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:49:10,335 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 01:49:10,472 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:49:10,474 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:49:10,689 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:49:10,695 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:49:10,695 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 01:49:10,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:10 BoogieIcfgContainer [2022-11-23 01:49:10,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:49:10,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:49:10,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:49:10,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:49:10,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:49:09" (1/3) ... [2022-11-23 01:49:10,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbcac40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:10, skipping insertion in model container [2022-11-23 01:49:10,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:10" (2/3) ... [2022-11-23 01:49:10,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbcac40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:49:10, skipping insertion in model container [2022-11-23 01:49:10,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:10" (3/3) ... [2022-11-23 01:49:10,706 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2022-11-23 01:49:10,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:49:10,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-23 01:49:10,731 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 01:49:10,848 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 01:49:10,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 213 flow [2022-11-23 01:49:11,018 INFO L130 PetriNetUnfolder]: 6/103 cut-off events. [2022-11-23 01:49:11,019 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:49:11,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 6/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 215 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-23 01:49:11,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 213 flow [2022-11-23 01:49:11,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 103 transitions, 209 flow [2022-11-23 01:49:11,039 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:49:11,065 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 103 transitions, 209 flow [2022-11-23 01:49:11,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 103 transitions, 209 flow [2022-11-23 01:49:11,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 103 transitions, 209 flow [2022-11-23 01:49:11,112 INFO L130 PetriNetUnfolder]: 6/103 cut-off events. [2022-11-23 01:49:11,112 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:49:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 103 events. 6/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 218 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-23 01:49:11,116 INFO L119 LiptonReduction]: Number of co-enabled transitions 2632 [2022-11-23 01:49:14,161 INFO L134 LiptonReduction]: Checked pairs total: 3775 [2022-11-23 01:49:14,162 INFO L136 LiptonReduction]: Total number of compositions: 109 [2022-11-23 01:49:14,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:49:14,185 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;@6dd49f9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:49:14,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-23 01:49:14,187 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-23 01:49:14,188 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:49:14,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:14,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 01:49:14,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:14,194 INFO L85 PathProgramCache]: Analyzing trace with hash 12911, now seen corresponding path program 1 times [2022-11-23 01:49:14,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:14,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545807754] [2022-11-23 01:49:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:14,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:14,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:14,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545807754] [2022-11-23 01:49:14,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545807754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:14,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:14,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:49:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038659694] [2022-11-23 01:49:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:14,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 01:49:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 01:49:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:49:14,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 213 [2022-11-23 01:49:14,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 73 flow. Second operand has 2 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:14,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 213 [2022-11-23 01:49:14,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:14,568 INFO L130 PetriNetUnfolder]: 122/254 cut-off events. [2022-11-23 01:49:14,568 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:49:14,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 254 events. 122/254 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1074 event pairs, 98 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 490. Up to 245 conditions per place. [2022-11-23 01:49:14,573 INFO L137 encePairwiseOnDemand]: 206/213 looper letters, 27 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2022-11-23 01:49:14,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 113 flow [2022-11-23 01:49:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 01:49:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 01:49:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2022-11-23 01:49:14,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5492957746478874 [2022-11-23 01:49:14,591 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2022-11-23 01:49:14,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2022-11-23 01:49:14,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:14,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2022-11-23 01:49:14,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,610 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,613 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 73 flow. Second operand 2 states and 234 transitions. [2022-11-23 01:49:14,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 113 flow [2022-11-23 01:49:14,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:49:14,619 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 58 flow [2022-11-23 01:49:14,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2022-11-23 01:49:14,628 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2022-11-23 01:49:14,628 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 58 flow [2022-11-23 01:49:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:14,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 01:49:14,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:49:14,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash 384928094, now seen corresponding path program 1 times [2022-11-23 01:49:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:14,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10076433] [2022-11-23 01:49:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:14,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10076433] [2022-11-23 01:49:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10076433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:14,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:14,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:49:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590968304] [2022-11-23 01:49:14,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:14,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:49:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:49:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:49:14,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 213 [2022-11-23 01:49:14,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:14,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 213 [2022-11-23 01:49:14,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:14,897 INFO L130 PetriNetUnfolder]: 122/255 cut-off events. [2022-11-23 01:49:14,897 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:49:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 255 events. 122/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1074 event pairs, 98 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 502. Up to 245 conditions per place. [2022-11-23 01:49:14,899 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 26 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-11-23 01:49:14,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 116 flow [2022-11-23 01:49:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:49:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:49:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-11-23 01:49:14,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49608763693270735 [2022-11-23 01:49:14,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-11-23 01:49:14,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-11-23 01:49:14,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:14,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-11-23 01:49:14,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,907 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 58 flow. Second operand 3 states and 317 transitions. [2022-11-23 01:49:14,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 116 flow [2022-11-23 01:49:14,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 01:49:14,908 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 70 flow [2022-11-23 01:49:14,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2022-11-23 01:49:14,909 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-11-23 01:49:14,910 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 70 flow [2022-11-23 01:49:14,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:14,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:14,910 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 01:49:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 01:49:14,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -939337916, now seen corresponding path program 1 times [2022-11-23 01:49:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:14,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713367820] [2022-11-23 01:49:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:14,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:15,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713367820] [2022-11-23 01:49:15,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713367820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564214091] [2022-11-23 01:49:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:15,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:15,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:15,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:15,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 01:49:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 01:49:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 01:49:15,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:49:15,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564214091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:15,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:49:15,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-23 01:49:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843047743] [2022-11-23 01:49:15,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:49:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:49:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:49:15,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 213 [2022-11-23 01:49:15,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:15,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 213 [2022-11-23 01:49:15,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:15,278 INFO L130 PetriNetUnfolder]: 170/343 cut-off events. [2022-11-23 01:49:15,294 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:49:15,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 343 events. 170/343 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1407 event pairs, 98 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 691. Up to 246 conditions per place. [2022-11-23 01:49:15,297 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-23 01:49:15,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 182 flow [2022-11-23 01:49:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:49:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:49:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2022-11-23 01:49:15,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.514866979655712 [2022-11-23 01:49:15,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2022-11-23 01:49:15,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2022-11-23 01:49:15,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:15,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2022-11-23 01:49:15,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,315 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 70 flow. Second operand 3 states and 329 transitions. [2022-11-23 01:49:15,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 182 flow [2022-11-23 01:49:15,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 178 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 01:49:15,316 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2022-11-23 01:49:15,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2022-11-23 01:49:15,317 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-11-23 01:49:15,317 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2022-11-23 01:49:15,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:15,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 01:49:15,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:15,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash -939337894, now seen corresponding path program 1 times [2022-11-23 01:49:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542253229] [2022-11-23 01:49:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:15,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:15,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:15,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542253229] [2022-11-23 01:49:15,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542253229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069466834] [2022-11-23 01:49:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:15,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:15,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:15,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:15,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 01:49:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 01:49:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:15,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:49:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:15,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069466834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:15,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:49:15,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 01:49:15,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892846378] [2022-11-23 01:49:15,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:15,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 01:49:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 01:49:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 01:49:15,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 213 [2022-11-23 01:49:15,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:15,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 213 [2022-11-23 01:49:15,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:15,942 INFO L130 PetriNetUnfolder]: 170/349 cut-off events. [2022-11-23 01:49:15,942 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-23 01:49:15,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 349 events. 170/349 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1359 event pairs, 140 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 757. Up to 341 conditions per place. [2022-11-23 01:49:15,945 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 27 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2022-11-23 01:49:15,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 158 flow [2022-11-23 01:49:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:49:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 01:49:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 604 transitions. [2022-11-23 01:49:15,955 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4726134585289515 [2022-11-23 01:49:15,955 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 604 transitions. [2022-11-23 01:49:15,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 604 transitions. [2022-11-23 01:49:15,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:15,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 604 transitions. [2022-11-23 01:49:15,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.66666666666667) internal successors, (604), 6 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) [2022-11-23 01:49:15,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,962 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 213.0) internal successors, (1491), 7 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,962 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 6 states and 604 transitions. [2022-11-23 01:49:15,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 158 flow [2022-11-23 01:49:15,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:49:15,964 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 116 flow [2022-11-23 01:49:15,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2022-11-23 01:49:15,965 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2022-11-23 01:49:15,965 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 116 flow [2022-11-23 01:49:15,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:15,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:15,966 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-23 01:49:15,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:16,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:16,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:16,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2009649587, now seen corresponding path program 1 times [2022-11-23 01:49:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932463248] [2022-11-23 01:49:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:16,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932463248] [2022-11-23 01:49:16,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932463248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:16,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614965418] [2022-11-23 01:49:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:16,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:16,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:16,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:16,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 01:49:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:16,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 01:49:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:49:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:49:16,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614965418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:16,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:49:16,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 01:49:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636033227] [2022-11-23 01:49:16,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 01:49:16,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 01:49:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 01:49:16,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 213 [2022-11-23 01:49:16,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 116 flow. Second operand has 13 states, 13 states have (on average 96.3076923076923) internal successors, (1252), 13 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:16,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:16,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 213 [2022-11-23 01:49:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:16,703 INFO L130 PetriNetUnfolder]: 170/356 cut-off events. [2022-11-23 01:49:16,704 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-23 01:49:16,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 356 events. 170/356 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1413 event pairs, 140 based on Foata normal form. 6/243 useless extension candidates. Maximal degree in co-relation 786. Up to 341 conditions per place. [2022-11-23 01:49:16,709 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 27 selfloop transitions, 11 changer transitions 0/39 dead transitions. [2022-11-23 01:49:16,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 39 transitions, 228 flow [2022-11-23 01:49:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 01:49:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 01:49:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1183 transitions. [2022-11-23 01:49:16,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4628325508607199 [2022-11-23 01:49:16,713 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1183 transitions. [2022-11-23 01:49:16,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1183 transitions. [2022-11-23 01:49:16,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:16,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1183 transitions. [2022-11-23 01:49:16,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 98.58333333333333) internal successors, (1183), 12 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:16,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:16,723 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:16,723 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 116 flow. Second operand 12 states and 1183 transitions. [2022-11-23 01:49:16,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 39 transitions, 228 flow [2022-11-23 01:49:16,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 39 transitions, 214 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 01:49:16,729 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 186 flow [2022-11-23 01:49:16,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=186, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2022-11-23 01:49:16,731 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2022-11-23 01:49:16,731 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 186 flow [2022-11-23 01:49:16,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.3076923076923) internal successors, (1252), 13 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:16,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:16,732 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-23 01:49:16,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:16,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:16,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash -18851532, now seen corresponding path program 2 times [2022-11-23 01:49:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21459540] [2022-11-23 01:49:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:16,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:17,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:17,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21459540] [2022-11-23 01:49:17,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21459540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:17,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:17,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:49:17,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886941584] [2022-11-23 01:49:17,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:49:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:49:17,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:49:17,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 213 [2022-11-23 01:49:17,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:17,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 213 [2022-11-23 01:49:17,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:17,316 INFO L130 PetriNetUnfolder]: 146/307 cut-off events. [2022-11-23 01:49:17,316 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-23 01:49:17,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 307 events. 146/307 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1132 event pairs, 105 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 698. Up to 270 conditions per place. [2022-11-23 01:49:17,318 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 41 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2022-11-23 01:49:17,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 284 flow [2022-11-23 01:49:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:49:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:49:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2022-11-23 01:49:17,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5054773082942097 [2022-11-23 01:49:17,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2022-11-23 01:49:17,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2022-11-23 01:49:17,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:17,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2022-11-23 01:49:17,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,323 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 186 flow. Second operand 3 states and 323 transitions. [2022-11-23 01:49:17,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 284 flow [2022-11-23 01:49:17,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 236 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-23 01:49:17,327 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 138 flow [2022-11-23 01:49:17,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2022-11-23 01:49:17,328 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2022-11-23 01:49:17,328 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 138 flow [2022-11-23 01:49:17,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:17,329 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-23 01:49:17,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 01:49:17,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -18851533, now seen corresponding path program 1 times [2022-11-23 01:49:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546051771] [2022-11-23 01:49:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:17,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546051771] [2022-11-23 01:49:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546051771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:17,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:17,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:49:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832902733] [2022-11-23 01:49:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:49:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:49:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:49:17,694 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 213 [2022-11-23 01:49:17,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:17,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 213 [2022-11-23 01:49:17,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:17,807 INFO L130 PetriNetUnfolder]: 130/272 cut-off events. [2022-11-23 01:49:17,808 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-23 01:49:17,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 272 events. 130/272 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 954 event pairs, 77 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 616. Up to 206 conditions per place. [2022-11-23 01:49:17,810 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 43 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2022-11-23 01:49:17,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 248 flow [2022-11-23 01:49:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:49:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:49:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2022-11-23 01:49:17,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47183098591549294 [2022-11-23 01:49:17,813 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2022-11-23 01:49:17,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2022-11-23 01:49:17,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:17,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2022-11-23 01:49:17,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,817 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 138 flow. Second operand 4 states and 402 transitions. [2022-11-23 01:49:17,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 248 flow [2022-11-23 01:49:17,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:49:17,821 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 138 flow [2022-11-23 01:49:17,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2022-11-23 01:49:17,822 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2022-11-23 01:49:17,822 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 138 flow [2022-11-23 01:49:17,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:17,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:17,823 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-23 01:49:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 01:49:17,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash -18851853, now seen corresponding path program 2 times [2022-11-23 01:49:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284451843] [2022-11-23 01:49:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:17,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284451843] [2022-11-23 01:49:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284451843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:18,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:18,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:49:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027861517] [2022-11-23 01:49:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:49:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:49:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:49:18,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2022-11-23 01:49:18,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 36 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:18,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2022-11-23 01:49:18,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:18,267 INFO L130 PetriNetUnfolder]: 210/458 cut-off events. [2022-11-23 01:49:18,267 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2022-11-23 01:49:18,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 458 events. 210/458 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2024 event pairs, 105 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1018. Up to 270 conditions per place. [2022-11-23 01:49:18,270 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 50 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2022-11-23 01:49:18,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 296 flow [2022-11-23 01:49:18,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:49:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:49:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2022-11-23 01:49:18,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4823943661971831 [2022-11-23 01:49:18,273 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2022-11-23 01:49:18,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2022-11-23 01:49:18,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:18,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2022-11-23 01:49:18,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,276 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,277 INFO L175 Difference]: Start difference. First operand has 53 places, 36 transitions, 138 flow. Second operand 4 states and 411 transitions. [2022-11-23 01:49:18,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 296 flow [2022-11-23 01:49:18,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 01:49:18,279 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 148 flow [2022-11-23 01:49:18,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2022-11-23 01:49:18,280 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2022-11-23 01:49:18,280 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 148 flow [2022-11-23 01:49:18,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,281 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:18,281 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:18,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 01:49:18,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:18,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash -584407128, now seen corresponding path program 1 times [2022-11-23 01:49:18,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:18,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537093584] [2022-11-23 01:49:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:18,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:18,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537093584] [2022-11-23 01:49:18,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537093584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:18,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:18,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:49:18,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843016736] [2022-11-23 01:49:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:18,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:49:18,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:49:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:49:18,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 213 [2022-11-23 01:49:18,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:18,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 213 [2022-11-23 01:49:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:18,721 INFO L130 PetriNetUnfolder]: 180/388 cut-off events. [2022-11-23 01:49:18,721 INFO L131 PetriNetUnfolder]: For 165/165 co-relation queries the response was YES. [2022-11-23 01:49:18,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 388 events. 180/388 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1577 event pairs, 13 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 974. Up to 266 conditions per place. [2022-11-23 01:49:18,725 INFO L137 encePairwiseOnDemand]: 204/213 looper letters, 55 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2022-11-23 01:49:18,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 367 flow [2022-11-23 01:49:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 01:49:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 01:49:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 503 transitions. [2022-11-23 01:49:18,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4723004694835681 [2022-11-23 01:49:18,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 503 transitions. [2022-11-23 01:49:18,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 503 transitions. [2022-11-23 01:49:18,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:18,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 503 transitions. [2022-11-23 01:49:18,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,732 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 148 flow. Second operand 5 states and 503 transitions. [2022-11-23 01:49:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 367 flow [2022-11-23 01:49:18,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:49:18,735 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 216 flow [2022-11-23 01:49:18,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2022-11-23 01:49:18,736 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2022-11-23 01:49:18,736 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 216 flow [2022-11-23 01:49:18,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:18,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:18,737 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:18,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 01:49:18,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1726137900, now seen corresponding path program 1 times [2022-11-23 01:49:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424987048] [2022-11-23 01:49:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:18,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:19,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:19,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424987048] [2022-11-23 01:49:19,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424987048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165830642] [2022-11-23 01:49:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:19,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:19,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:19,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 01:49:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 01:49:19,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:19,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:49:19,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 01:49:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:19,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:49:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:19,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165830642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:19,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:49:19,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-23 01:49:19,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771120227] [2022-11-23 01:49:19,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:19,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 01:49:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 01:49:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-23 01:49:20,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 213 [2022-11-23 01:49:20,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 216 flow. Second operand has 15 states, 15 states have (on average 90.0) internal successors, (1350), 15 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:20,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:20,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 213 [2022-11-23 01:49:20,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:21,230 INFO L130 PetriNetUnfolder]: 372/802 cut-off events. [2022-11-23 01:49:21,231 INFO L131 PetriNetUnfolder]: For 461/461 co-relation queries the response was YES. [2022-11-23 01:49:21,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2430 conditions, 802 events. 372/802 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3530 event pairs, 78 based on Foata normal form. 108/887 useless extension candidates. Maximal degree in co-relation 2409. Up to 252 conditions per place. [2022-11-23 01:49:21,237 INFO L137 encePairwiseOnDemand]: 207/213 looper letters, 130 selfloop transitions, 8 changer transitions 0/139 dead transitions. [2022-11-23 01:49:21,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 139 transitions, 872 flow [2022-11-23 01:49:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 01:49:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 01:49:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 814 transitions. [2022-11-23 01:49:21,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47769953051643194 [2022-11-23 01:49:21,241 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 814 transitions. [2022-11-23 01:49:21,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 814 transitions. [2022-11-23 01:49:21,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:21,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 814 transitions. [2022-11-23 01:49:21,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.75) internal successors, (814), 8 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:21,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:21,247 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:21,247 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 216 flow. Second operand 8 states and 814 transitions. [2022-11-23 01:49:21,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 139 transitions, 872 flow [2022-11-23 01:49:21,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 139 transitions, 872 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 01:49:21,252 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 281 flow [2022-11-23 01:49:21,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2022-11-23 01:49:21,253 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2022-11-23 01:49:21,253 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 281 flow [2022-11-23 01:49:21,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.0) internal successors, (1350), 15 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:21,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:21,254 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:21,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 01:49:21,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2018225490, now seen corresponding path program 1 times [2022-11-23 01:49:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591154950] [2022-11-23 01:49:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:21,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:21,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591154950] [2022-11-23 01:49:21,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591154950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:21,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829786756] [2022-11-23 01:49:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:21,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:21,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:21,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:21,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 01:49:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 01:49:21,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:49:22,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 01:49:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:22,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:49:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:22,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829786756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:22,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:49:22,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-23 01:49:22,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33873076] [2022-11-23 01:49:22,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:22,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 01:49:22,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:22,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 01:49:22,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-23 01:49:23,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 213 [2022-11-23 01:49:23,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 281 flow. Second operand has 15 states, 15 states have (on average 89.0) internal successors, (1335), 15 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:23,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:23,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 213 [2022-11-23 01:49:23,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:23,777 INFO L130 PetriNetUnfolder]: 648/1354 cut-off events. [2022-11-23 01:49:23,777 INFO L131 PetriNetUnfolder]: For 2766/2766 co-relation queries the response was YES. [2022-11-23 01:49:23,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 1354 events. 648/1354 cut-off events. For 2766/2766 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6248 event pairs, 220 based on Foata normal form. 138/1469 useless extension candidates. Maximal degree in co-relation 4547. Up to 608 conditions per place. [2022-11-23 01:49:23,788 INFO L137 encePairwiseOnDemand]: 207/213 looper letters, 115 selfloop transitions, 7 changer transitions 0/123 dead transitions. [2022-11-23 01:49:23,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 123 transitions, 1011 flow [2022-11-23 01:49:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 01:49:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 01:49:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-11-23 01:49:23,791 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45598591549295775 [2022-11-23 01:49:23,791 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-11-23 01:49:23,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-11-23 01:49:23,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:23,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-11-23 01:49:23,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:23,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:23,797 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:23,797 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 281 flow. Second operand 8 states and 777 transitions. [2022-11-23 01:49:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 123 transitions, 1011 flow [2022-11-23 01:49:23,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 123 transitions, 960 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-11-23 01:49:23,803 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 322 flow [2022-11-23 01:49:23,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=322, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2022-11-23 01:49:23,804 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2022-11-23 01:49:23,804 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 322 flow [2022-11-23 01:49:23,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 89.0) internal successors, (1335), 15 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:23,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:23,805 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 01:49:23,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:24,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:24,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1660127785, now seen corresponding path program 2 times [2022-11-23 01:49:24,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:24,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281935045] [2022-11-23 01:49:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:24,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281935045] [2022-11-23 01:49:24,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281935045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:24,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477623528] [2022-11-23 01:49:24,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:49:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:24,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:24,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 01:49:24,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:49:24,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:49:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 01:49:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:24,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:49:24,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 01:49:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:25,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:49:25,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477623528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:25,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:49:25,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-23 01:49:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933599885] [2022-11-23 01:49:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 01:49:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 01:49:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-23 01:49:25,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2022-11-23 01:49:25,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 322 flow. Second operand has 9 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:25,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:25,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2022-11-23 01:49:25,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:25,877 INFO L130 PetriNetUnfolder]: 618/1296 cut-off events. [2022-11-23 01:49:25,877 INFO L131 PetriNetUnfolder]: For 2321/2321 co-relation queries the response was YES. [2022-11-23 01:49:25,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4639 conditions, 1296 events. 618/1296 cut-off events. For 2321/2321 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6063 event pairs, 0 based on Foata normal form. 30/1304 useless extension candidates. Maximal degree in co-relation 4609. Up to 320 conditions per place. [2022-11-23 01:49:25,890 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 154 selfloop transitions, 6 changer transitions 0/161 dead transitions. [2022-11-23 01:49:25,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 161 transitions, 1234 flow [2022-11-23 01:49:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 01:49:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 01:49:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 840 transitions. [2022-11-23 01:49:25,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49295774647887325 [2022-11-23 01:49:25,893 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 840 transitions. [2022-11-23 01:49:25,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 840 transitions. [2022-11-23 01:49:25,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:25,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 840 transitions. [2022-11-23 01:49:25,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.0) internal successors, (840), 8 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:25,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:25,899 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:25,900 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 322 flow. Second operand 8 states and 840 transitions. [2022-11-23 01:49:25,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 161 transitions, 1234 flow [2022-11-23 01:49:25,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 161 transitions, 1185 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-23 01:49:25,910 INFO L231 Difference]: Finished difference. Result has 84 places, 50 transitions, 299 flow [2022-11-23 01:49:25,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=299, PETRI_PLACES=84, PETRI_TRANSITIONS=50} [2022-11-23 01:49:25,911 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2022-11-23 01:49:25,911 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 50 transitions, 299 flow [2022-11-23 01:49:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:25,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:25,912 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 01:49:25,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 01:49:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:26,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1112687441, now seen corresponding path program 2 times [2022-11-23 01:49:26,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705422482] [2022-11-23 01:49:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:26,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:26,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705422482] [2022-11-23 01:49:26,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705422482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673584691] [2022-11-23 01:49:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:49:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:26,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:26,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 01:49:26,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:49:26,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:49:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 01:49:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 01:49:27,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 01:49:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:27,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:49:27,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673584691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:27,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:49:27,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-23 01:49:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573218869] [2022-11-23 01:49:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:27,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 01:49:27,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 01:49:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-23 01:49:27,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 213 [2022-11-23 01:49:27,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 50 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 93.44444444444444) internal successors, (841), 9 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:27,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:27,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 213 [2022-11-23 01:49:27,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:27,975 INFO L130 PetriNetUnfolder]: 596/1252 cut-off events. [2022-11-23 01:49:27,976 INFO L131 PetriNetUnfolder]: For 2757/2757 co-relation queries the response was YES. [2022-11-23 01:49:27,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 1252 events. 596/1252 cut-off events. For 2757/2757 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5575 event pairs, 0 based on Foata normal form. 22/1252 useless extension candidates. Maximal degree in co-relation 4448. Up to 502 conditions per place. [2022-11-23 01:49:27,987 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 108 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2022-11-23 01:49:27,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 945 flow [2022-11-23 01:49:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 01:49:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 01:49:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 797 transitions. [2022-11-23 01:49:27,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4677230046948357 [2022-11-23 01:49:27,990 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 797 transitions. [2022-11-23 01:49:27,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 797 transitions. [2022-11-23 01:49:27,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:27,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 797 transitions. [2022-11-23 01:49:27,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:27,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:27,996 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 213.0) internal successors, (1917), 9 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:27,996 INFO L175 Difference]: Start difference. First operand has 84 places, 50 transitions, 299 flow. Second operand 8 states and 797 transitions. [2022-11-23 01:49:27,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 945 flow [2022-11-23 01:49:28,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 887 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-23 01:49:28,003 INFO L231 Difference]: Finished difference. Result has 83 places, 49 transitions, 288 flow [2022-11-23 01:49:28,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=288, PETRI_PLACES=83, PETRI_TRANSITIONS=49} [2022-11-23 01:49:28,005 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2022-11-23 01:49:28,005 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 49 transitions, 288 flow [2022-11-23 01:49:28,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.44444444444444) internal successors, (841), 9 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:28,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:28,006 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:28,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:28,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 01:49:28,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2146578758, now seen corresponding path program 1 times [2022-11-23 01:49:28,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:28,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178828951] [2022-11-23 01:49:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:28,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178828951] [2022-11-23 01:49:28,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178828951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:49:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864269896] [2022-11-23 01:49:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:28,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:49:28,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:49:28,357 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:49:28,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 01:49:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:28,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 01:49:28,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:49:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:28,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:49:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 01:49:28,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864269896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:28,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:49:28,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 01:49:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894302987] [2022-11-23 01:49:28,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:28,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 01:49:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:28,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 01:49:28,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 01:49:28,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 213 [2022-11-23 01:49:28,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 49 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 97.76923076923077) internal successors, (1271), 13 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:28,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:28,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 213 [2022-11-23 01:49:28,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:29,220 INFO L130 PetriNetUnfolder]: 1058/2176 cut-off events. [2022-11-23 01:49:29,220 INFO L131 PetriNetUnfolder]: For 4511/4511 co-relation queries the response was YES. [2022-11-23 01:49:29,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7533 conditions, 2176 events. 1058/2176 cut-off events. For 4511/4511 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9765 event pairs, 125 based on Foata normal form. 132/2286 useless extension candidates. Maximal degree in co-relation 7504. Up to 491 conditions per place. [2022-11-23 01:49:29,241 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 178 selfloop transitions, 12 changer transitions 0/191 dead transitions. [2022-11-23 01:49:29,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 1480 flow [2022-11-23 01:49:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 01:49:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 01:49:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-11-23 01:49:29,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4902190923317684 [2022-11-23 01:49:29,245 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-11-23 01:49:29,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-11-23 01:49:29,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:29,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-11-23 01:49:29,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:29,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:29,254 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 213.0) internal successors, (2769), 13 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:29,254 INFO L175 Difference]: Start difference. First operand has 83 places, 49 transitions, 288 flow. Second operand 12 states and 1253 transitions. [2022-11-23 01:49:29,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 1480 flow [2022-11-23 01:49:29,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 191 transitions, 1469 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-23 01:49:29,263 INFO L231 Difference]: Finished difference. Result has 95 places, 55 transitions, 365 flow [2022-11-23 01:49:29,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=95, PETRI_TRANSITIONS=55} [2022-11-23 01:49:29,264 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2022-11-23 01:49:29,264 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 55 transitions, 365 flow [2022-11-23 01:49:29,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.76923076923077) internal successors, (1271), 13 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:29,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:29,265 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:29,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 01:49:29,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 01:49:29,471 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash -237537152, now seen corresponding path program 2 times [2022-11-23 01:49:29,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:29,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795930145] [2022-11-23 01:49:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-23 01:49:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795930145] [2022-11-23 01:49:29,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795930145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:29,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:29,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:49:29,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393933840] [2022-11-23 01:49:29,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:29,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 01:49:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 01:49:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 01:49:29,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2022-11-23 01:49:29,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 55 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:29,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:29,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2022-11-23 01:49:29,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:30,394 INFO L130 PetriNetUnfolder]: 1036/2107 cut-off events. [2022-11-23 01:49:30,394 INFO L131 PetriNetUnfolder]: For 5187/5187 co-relation queries the response was YES. [2022-11-23 01:49:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7949 conditions, 2107 events. 1036/2107 cut-off events. For 5187/5187 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 9488 event pairs, 945 based on Foata normal form. 0/2107 useless extension candidates. Maximal degree in co-relation 7914. Up to 2026 conditions per place. [2022-11-23 01:49:30,414 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 55 selfloop transitions, 4 changer transitions 2/62 dead transitions. [2022-11-23 01:49:30,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 62 transitions, 533 flow [2022-11-23 01:49:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 01:49:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 01:49:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 396 transitions. [2022-11-23 01:49:30,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4647887323943662 [2022-11-23 01:49:30,416 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 396 transitions. [2022-11-23 01:49:30,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 396 transitions. [2022-11-23 01:49:30,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:30,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 396 transitions. [2022-11-23 01:49:30,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:30,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:30,420 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:30,420 INFO L175 Difference]: Start difference. First operand has 95 places, 55 transitions, 365 flow. Second operand 4 states and 396 transitions. [2022-11-23 01:49:30,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 62 transitions, 533 flow [2022-11-23 01:49:30,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 62 transitions, 496 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-11-23 01:49:30,433 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 314 flow [2022-11-23 01:49:30,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2022-11-23 01:49:30,434 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 56 predicate places. [2022-11-23 01:49:30,434 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 314 flow [2022-11-23 01:49:30,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:30,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:49:30,434 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:30,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 01:49:30,435 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 01:49:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:49:30,435 INFO L85 PathProgramCache]: Analyzing trace with hash 981559513, now seen corresponding path program 1 times [2022-11-23 01:49:30,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:49:30,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281498441] [2022-11-23 01:49:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:49:30,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:49:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:49:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-23 01:49:30,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:30,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281498441] [2022-11-23 01:49:30,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281498441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:49:30,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:49:30,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 01:49:30,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967931049] [2022-11-23 01:49:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:49:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 01:49:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 01:49:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 01:49:30,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 213 [2022-11-23 01:49:30,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:30,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:49:30,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 213 [2022-11-23 01:49:30,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:49:31,381 INFO L130 PetriNetUnfolder]: 992/2008 cut-off events. [2022-11-23 01:49:31,381 INFO L131 PetriNetUnfolder]: For 3933/3933 co-relation queries the response was YES. [2022-11-23 01:49:31,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 2008 events. 992/2008 cut-off events. For 3933/3933 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 9452 event pairs, 45 based on Foata normal form. 10/2018 useless extension candidates. Maximal degree in co-relation 7089. Up to 1709 conditions per place. [2022-11-23 01:49:31,393 INFO L137 encePairwiseOnDemand]: 204/213 looper letters, 0 selfloop transitions, 0 changer transitions 100/100 dead transitions. [2022-11-23 01:49:31,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 798 flow [2022-11-23 01:49:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 01:49:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 01:49:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 637 transitions. [2022-11-23 01:49:31,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4272300469483568 [2022-11-23 01:49:31,396 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 637 transitions. [2022-11-23 01:49:31,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 637 transitions. [2022-11-23 01:49:31,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:49:31,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 637 transitions. [2022-11-23 01:49:31,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.0) internal successors, (637), 7 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:31,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:31,401 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:31,402 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 314 flow. Second operand 7 states and 637 transitions. [2022-11-23 01:49:31,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 798 flow [2022-11-23 01:49:31,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 765 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-11-23 01:49:31,412 INFO L231 Difference]: Finished difference. Result has 87 places, 0 transitions, 0 flow [2022-11-23 01:49:31,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=87, PETRI_TRANSITIONS=0} [2022-11-23 01:49:31,413 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 51 predicate places. [2022-11-23 01:49:31,413 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 0 transitions, 0 flow [2022-11-23 01:49:31,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:49:31,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 20 remaining) [2022-11-23 01:49:31,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-23 01:49:31,416 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-23 01:49:31,417 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-23 01:49:31,417 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-23 01:49:31,417 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-23 01:49:31,417 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-23 01:49:31,417 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-23 01:49:31,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-23 01:49:31,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-23 01:49:31,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (9 of 20 remaining) [2022-11-23 01:49:31,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 20 remaining) [2022-11-23 01:49:31,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2022-11-23 01:49:31,419 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2022-11-23 01:49:31,419 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2022-11-23 01:49:31,419 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2022-11-23 01:49:31,419 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2022-11-23 01:49:31,419 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 20 remaining) [2022-11-23 01:49:31,419 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 20 remaining) [2022-11-23 01:49:31,420 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 20 remaining) [2022-11-23 01:49:31,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 01:49:31,420 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 01:49:31,425 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 01:49:31,425 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 01:49:31,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:49:31 BasicIcfg [2022-11-23 01:49:31,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 01:49:31,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 01:49:31,428 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 01:49:31,428 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 01:49:31,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:49:10" (3/4) ... [2022-11-23 01:49:31,431 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 01:49:31,437 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-11-23 01:49:31,440 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-23 01:49:31,440 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 01:49:31,441 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 01:49:31,470 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/witness.graphml [2022-11-23 01:49:31,471 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 01:49:31,471 INFO L158 Benchmark]: Toolchain (without parser) took 21989.46ms. Allocated memory was 148.9MB in the beginning and 346.0MB in the end (delta: 197.1MB). Free memory was 117.5MB in the beginning and 195.5MB in the end (delta: -78.0MB). Peak memory consumption was 120.8MB. Max. memory is 16.1GB. [2022-11-23 01:49:31,471 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 71.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 01:49:31,472 INFO L158 Benchmark]: CACSL2BoogieTranslator took 615.23ms. Allocated memory is still 148.9MB. Free memory was 117.3MB in the beginning and 89.6MB in the end (delta: 27.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-23 01:49:31,472 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.68ms. Allocated memory is still 148.9MB. Free memory was 89.6MB in the beginning and 87.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 01:49:31,472 INFO L158 Benchmark]: Boogie Preprocessor took 57.44ms. Allocated memory is still 148.9MB. Free memory was 87.2MB in the beginning and 85.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 01:49:31,473 INFO L158 Benchmark]: RCFGBuilder took 464.50ms. Allocated memory is still 148.9MB. Free memory was 85.7MB in the beginning and 70.0MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 01:49:31,473 INFO L158 Benchmark]: TraceAbstraction took 20728.03ms. Allocated memory was 148.9MB in the beginning and 346.0MB in the end (delta: 197.1MB). Free memory was 69.2MB in the beginning and 197.6MB in the end (delta: -128.4MB). Peak memory consumption was 70.5MB. Max. memory is 16.1GB. [2022-11-23 01:49:31,474 INFO L158 Benchmark]: Witness Printer took 42.68ms. Allocated memory is still 346.0MB. Free memory was 197.6MB in the beginning and 195.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 01:49:31,475 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 71.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 615.23ms. Allocated memory is still 148.9MB. Free memory was 117.3MB in the beginning and 89.6MB in the end (delta: 27.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.68ms. Allocated memory is still 148.9MB. Free memory was 89.6MB in the beginning and 87.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.44ms. Allocated memory is still 148.9MB. Free memory was 87.2MB in the beginning and 85.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 464.50ms. Allocated memory is still 148.9MB. Free memory was 85.7MB in the beginning and 70.0MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 20728.03ms. Allocated memory was 148.9MB in the beginning and 346.0MB in the end (delta: 197.1MB). Free memory was 69.2MB in the beginning and 197.6MB in the end (delta: -128.4MB). Peak memory consumption was 70.5MB. Max. memory is 16.1GB. * Witness Printer took 42.68ms. Allocated memory is still 346.0MB. Free memory was 197.6MB in the beginning and 195.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 101 PlacesBefore, 36 PlacesAfterwards, 103 TransitionsBefore, 35 TransitionsAfterwards, 2632 CoEnabledTransitionPairs, 4 FixpointIterations, 26 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 109 TotalNumberOfCompositions, 3775 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2731, independent: 2625, independent conditional: 0, independent unconditional: 2625, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1764, independent: 1726, independent conditional: 0, independent unconditional: 1726, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1764, independent: 1705, independent conditional: 0, independent unconditional: 1705, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 59, independent: 21, independent conditional: 0, independent unconditional: 21, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 222, independent: 75, independent conditional: 0, independent unconditional: 75, dependent: 147, dependent conditional: 0, dependent unconditional: 147, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2731, independent: 899, independent conditional: 0, independent unconditional: 899, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 1764, unknown conditional: 0, unknown unconditional: 1764] , Statistics on independence cache: Total cache size (in pairs): 117, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 127 locations, 20 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20.5s, OverallIterations: 16, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2955 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2400 mSDsluCounter, 471 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 401 mSDsCounter, 179 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5345 IncrementalHoareTripleChecker+Invalid, 5524 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 179 mSolverCounterUnsat, 70 mSDtfsCounter, 5345 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 324 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=14, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 501 NumberOfCodeBlocks, 501 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 560 ConstructedInterpolants, 22 QuantifiedInterpolants, 5924 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1511 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 29 InterpolantComputations, 11 PerfectInterpolantSequences, 1482/1662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 01:49:31,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836f2bef-cf87-4e83-b998-6198452abf7a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE