./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/04-mutex_04-munge_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/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_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/04-mutex_04-munge_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/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_4de2ae5a-e3d9-4e07-97ce-397d79e48148/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 09d5acb2f81ee0994352651dad5f891cf0af6948836360f3240d2ea1a246e8a6 --- 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 01:56:39,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:56:39,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:56:39,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:56:39,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:56:39,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:56:39,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:56:39,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:56:39,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:56:39,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:56:39,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:56:39,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:56:39,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:56:39,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:56:39,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:56:39,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:56:39,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:56:39,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:56:39,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:56:39,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:56:39,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:56:39,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:56:39,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:56:39,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:56:39,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:56:39,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:56:39,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:56:39,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:56:39,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:56:39,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:56:39,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:56:39,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:56:39,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:56:39,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:56:39,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:56:39,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:56:39,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:56:39,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:56:39,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:56:39,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:56:39,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:56:39,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 01:56:39,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:56:39,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:56:39,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:56:39,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:56:39,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:56:39,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:56:39,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:56:39,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:56:39,568 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:56:39,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:56:39,569 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:56:39,569 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 01:56:39,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:56:39,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:56:39,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:56:39,570 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 01:56:39,571 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 01:56:39,571 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 01:56:39,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:56:39,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 01:56:39,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:56:39,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:56:39,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:56:39,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:56:39,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:56:39,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:56:39,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:56:39,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:56:39,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:56:39,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:56:39,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:56:39,575 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:56:39,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:56:39,576 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_4de2ae5a-e3d9-4e07-97ce-397d79e48148/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d5acb2f81ee0994352651dad5f891cf0af6948836360f3240d2ea1a246e8a6 [2022-11-23 01:56:39,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:56:39,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:56:39,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:56:39,993 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:56:39,993 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:56:39,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/goblint-regression/04-mutex_04-munge_nr.i [2022-11-23 01:56:43,247 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:56:43,542 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:56:43,542 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/sv-benchmarks/c/goblint-regression/04-mutex_04-munge_nr.i [2022-11-23 01:56:43,562 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/data/9ab04d6ee/967abf9095904c1d8d70084d24bae422/FLAG49c832698 [2022-11-23 01:56:43,581 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/data/9ab04d6ee/967abf9095904c1d8d70084d24bae422 [2022-11-23 01:56:43,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:56:43,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:56:43,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:56:43,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:56:43,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:56:43,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:43" (1/1) ... [2022-11-23 01:56:43,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df22449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43, skipping insertion in model container [2022-11-23 01:56:43,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:43" (1/1) ... [2022-11-23 01:56:43,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:56:43,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:56:44,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:56:44,459 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:56:44,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:56:44,685 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:56:44,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44 WrapperNode [2022-11-23 01:56:44,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:56:44,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:56:44,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:56:44,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:56:44,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,777 INFO L138 Inliner]: procedures = 263, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2022-11-23 01:56:44,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:56:44,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:56:44,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:56:44,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:56:44,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,815 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:56:44,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:56:44,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:56:44,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:56:44,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (1/1) ... [2022-11-23 01:56:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:56:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:56:44,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:56:44,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:56:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 01:56:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 01:56:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 01:56:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 01:56:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 01:56:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:56:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-23 01:56:44,946 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-23 01:56:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 01:56:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:56:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:56:44,949 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 01:56:45,188 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:56:45,191 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:56:45,370 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:56:45,378 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:56:45,378 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 01:56:45,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:45 BoogieIcfgContainer [2022-11-23 01:56:45,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:56:45,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:56:45,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:56:45,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:56:45,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:43" (1/3) ... [2022-11-23 01:56:45,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7741543d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:45, skipping insertion in model container [2022-11-23 01:56:45,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:44" (2/3) ... [2022-11-23 01:56:45,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7741543d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:45, skipping insertion in model container [2022-11-23 01:56:45,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:45" (3/3) ... [2022-11-23 01:56:45,402 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_04-munge_nr.i [2022-11-23 01:56:45,428 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:56:45,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-23 01:56:45,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 01:56:45,507 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-23 01:56:45,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 62 transitions, 132 flow [2022-11-23 01:56:45,611 INFO L130 PetriNetUnfolder]: 0/61 cut-off events. [2022-11-23 01:56:45,612 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 01:56:45,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 61 events. 0/61 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-23 01:56:45,620 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 62 transitions, 132 flow [2022-11-23 01:56:45,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 118 flow [2022-11-23 01:56:45,630 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 01:56:45,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 56 transitions, 118 flow [2022-11-23 01:56:45,686 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 56 transitions, 118 flow [2022-11-23 01:56:45,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 118 flow [2022-11-23 01:56:45,717 INFO L130 PetriNetUnfolder]: 0/56 cut-off events. [2022-11-23 01:56:45,731 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 01:56:45,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 56 events. 0/56 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-23 01:56:45,733 INFO L119 LiptonReduction]: Number of co-enabled transitions 336 [2022-11-23 01:56:48,785 INFO L134 LiptonReduction]: Checked pairs total: 423 [2022-11-23 01:56:48,785 INFO L136 LiptonReduction]: Total number of compositions: 58 [2022-11-23 01:56:48,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:56:48,819 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;@7a6389a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:56:48,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 01:56:48,821 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-23 01:56:48,822 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:56:48,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:56:48,823 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-23 01:56:48,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 01:56:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash 227, now seen corresponding path program 1 times [2022-11-23 01:56:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:48,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065272765] [2022-11-23 01:56:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:49,004 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 01:56:49,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065272765] [2022-11-23 01:56:49,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065272765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:56:49,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:56:49,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 01:56:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708129922] [2022-11-23 01:56:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:56:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 01:56:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 01:56:49,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:56:49,062 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 120 [2022-11-23 01:56:49,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions, 30 flow. Second operand has 2 states, 2 states have (on average 60.5) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:49,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:56:49,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 120 [2022-11-23 01:56:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:56:49,132 INFO L130 PetriNetUnfolder]: 8/26 cut-off events. [2022-11-23 01:56:49,133 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 01:56:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 26 events. 8/26 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 51 event pairs, 8 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 44. Up to 27 conditions per place. [2022-11-23 01:56:49,137 INFO L137 encePairwiseOnDemand]: 118/120 looper letters, 10 selfloop transitions, 0 changer transitions 0/10 dead transitions. [2022-11-23 01:56:49,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 46 flow [2022-11-23 01:56:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 01:56:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 01:56:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2022-11-23 01:56:49,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.55 [2022-11-23 01:56:49,157 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 132 transitions. [2022-11-23 01:56:49,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 132 transitions. [2022-11-23 01:56:49,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:56:49,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 132 transitions. [2022-11-23 01:56:49,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:49,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:49,183 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:49,185 INFO L175 Difference]: Start difference. First operand has 16 places, 12 transitions, 30 flow. Second operand 2 states and 132 transitions. [2022-11-23 01:56:49,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 46 flow [2022-11-23 01:56:49,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:56:49,194 INFO L231 Difference]: Finished difference. Result has 13 places, 10 transitions, 22 flow [2022-11-23 01:56:49,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=22, PETRI_PLACES=13, PETRI_TRANSITIONS=10} [2022-11-23 01:56:49,202 INFO L288 CegarLoopForPetriNet]: 16 programPoint places, -3 predicate places. [2022-11-23 01:56:49,202 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 10 transitions, 22 flow [2022-11-23 01:56:49,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 60.5) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:49,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:56:49,203 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 01:56:49,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:56:49,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 01:56:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:49,205 INFO L85 PathProgramCache]: Analyzing trace with hash 6961762, now seen corresponding path program 1 times [2022-11-23 01:56:49,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297118601] [2022-11-23 01:56:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:49,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:49,513 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 01:56:49,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297118601] [2022-11-23 01:56:49,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297118601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:56:49,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:56:49,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:56:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786958906] [2022-11-23 01:56:49,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:56:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:56:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:56:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:56:49,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 120 [2022-11-23 01:56:49,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 22 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 01:56:49,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:56:49,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 120 [2022-11-23 01:56:49,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:56:49,591 INFO L130 PetriNetUnfolder]: 6/21 cut-off events. [2022-11-23 01:56:49,591 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:56:49,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 21 events. 6/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 30 event pairs, 6 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 43. Up to 20 conditions per place. [2022-11-23 01:56:49,592 INFO L137 encePairwiseOnDemand]: 117/120 looper letters, 7 selfloop transitions, 2 changer transitions 0/9 dead transitions. [2022-11-23 01:56:49,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 9 transitions, 38 flow [2022-11-23 01:56:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:56:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:56:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2022-11-23 01:56:49,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2022-11-23 01:56:49,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2022-11-23 01:56:49,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2022-11-23 01:56:49,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:56:49,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2022-11-23 01:56:49,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:49,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:49,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:49,609 INFO L175 Difference]: Start difference. First operand has 13 places, 10 transitions, 22 flow. Second operand 3 states and 175 transitions. [2022-11-23 01:56:49,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 9 transitions, 38 flow [2022-11-23 01:56:49,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 01:56:49,610 INFO L231 Difference]: Finished difference. Result has 14 places, 9 transitions, 24 flow [2022-11-23 01:56:49,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2022-11-23 01:56:49,615 INFO L288 CegarLoopForPetriNet]: 16 programPoint places, -2 predicate places. [2022-11-23 01:56:49,616 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 24 flow [2022-11-23 01:56:49,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 01:56:49,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:56:49,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-23 01:56:49,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 01:56:49,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 01:56:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash 6961761, now seen corresponding path program 1 times [2022-11-23 01:56:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:49,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46755589] [2022-11-23 01:56:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:49,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:49,738 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 01:56:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46755589] [2022-11-23 01:56:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46755589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:56:49,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:56:49,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:56:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349475533] [2022-11-23 01:56:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:56:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:56:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:56:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:56:49,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 120 [2022-11-23 01:56:49,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 01:56:49,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:56:49,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 120 [2022-11-23 01:56:49,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:56:49,810 INFO L130 PetriNetUnfolder]: 4/16 cut-off events. [2022-11-23 01:56:49,810 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:56:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 35. Up to 15 conditions per place. [2022-11-23 01:56:49,811 INFO L137 encePairwiseOnDemand]: 117/120 looper letters, 6 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2022-11-23 01:56:49,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 38 flow [2022-11-23 01:56:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:56:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:56:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2022-11-23 01:56:49,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-11-23 01:56:49,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2022-11-23 01:56:49,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2022-11-23 01:56:49,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:56:49,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2022-11-23 01:56:49,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 01:56:49,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:49,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:49,817 INFO L175 Difference]: Start difference. First operand has 14 places, 9 transitions, 24 flow. Second operand 3 states and 165 transitions. [2022-11-23 01:56:49,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 38 flow [2022-11-23 01:56:49,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:56:49,818 INFO L231 Difference]: Finished difference. Result has 13 places, 8 transitions, 22 flow [2022-11-23 01:56:49,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=22, PETRI_PLACES=13, PETRI_TRANSITIONS=8} [2022-11-23 01:56:49,819 INFO L288 CegarLoopForPetriNet]: 16 programPoint places, -3 predicate places. [2022-11-23 01:56:49,820 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 8 transitions, 22 flow [2022-11-23 01:56:49,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 01:56:49,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:56:49,820 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:56:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 01:56:49,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 01:56:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -194533777, now seen corresponding path program 1 times [2022-11-23 01:56:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:49,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185656519] [2022-11-23 01:56:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:50,074 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 01:56:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:50,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185656519] [2022-11-23 01:56:50,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185656519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:56:50,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:56:50,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 01:56:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944735043] [2022-11-23 01:56:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:56:50,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:56:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:56:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:56:50,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 120 [2022-11-23 01:56:50,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 8 transitions, 22 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 01:56:50,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:56:50,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 120 [2022-11-23 01:56:50,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:56:50,194 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-23 01:56:50,194 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 01:56:50,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 2 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 35. Up to 14 conditions per place. [2022-11-23 01:56:50,195 INFO L137 encePairwiseOnDemand]: 116/120 looper letters, 7 selfloop transitions, 3 changer transitions 0/10 dead transitions. [2022-11-23 01:56:50,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 46 flow [2022-11-23 01:56:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:56:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:56:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2022-11-23 01:56:50,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2022-11-23 01:56:50,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2022-11-23 01:56:50,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2022-11-23 01:56:50,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:56:50,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2022-11-23 01:56:50,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 01:56:50,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:50,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:50,210 INFO L175 Difference]: Start difference. First operand has 13 places, 8 transitions, 22 flow. Second operand 3 states and 173 transitions. [2022-11-23 01:56:50,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 46 flow [2022-11-23 01:56:50,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 01:56:50,218 INFO L231 Difference]: Finished difference. Result has 14 places, 10 transitions, 37 flow [2022-11-23 01:56:50,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=14, PETRI_TRANSITIONS=10} [2022-11-23 01:56:50,219 INFO L288 CegarLoopForPetriNet]: 16 programPoint places, -2 predicate places. [2022-11-23 01:56:50,220 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 10 transitions, 37 flow [2022-11-23 01:56:50,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 01:56:50,220 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 01:56:50,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:56:50,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 01:56:50,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-11-23 01:56:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:50,222 INFO L85 PathProgramCache]: Analyzing trace with hash -195427507, now seen corresponding path program 2 times [2022-11-23 01:56:50,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:50,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422637886] [2022-11-23 01:56:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:50,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:50,386 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 01:56:50,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:50,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422637886] [2022-11-23 01:56:50,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422637886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:56:50,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:56:50,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 01:56:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961152246] [2022-11-23 01:56:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:56:50,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 01:56:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 01:56:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 01:56:50,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 120 [2022-11-23 01:56:50,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 10 transitions, 37 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 01:56:50,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 01:56:50,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 120 [2022-11-23 01:56:50,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 01:56:50,471 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2022-11-23 01:56:50,473 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 01:56:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 15 events. 3/15 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 2 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 47. Up to 15 conditions per place. [2022-11-23 01:56:50,474 INFO L137 encePairwiseOnDemand]: 118/120 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2022-11-23 01:56:50,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 9 transitions, 53 flow [2022-11-23 01:56:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 01:56:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 01:56:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2022-11-23 01:56:50,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2022-11-23 01:56:50,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2022-11-23 01:56:50,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2022-11-23 01:56:50,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 01:56:50,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2022-11-23 01:56:50,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 01:56:50,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:50,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states 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 01:56:50,484 INFO L175 Difference]: Start difference. First operand has 14 places, 10 transitions, 37 flow. Second operand 3 states and 176 transitions. [2022-11-23 01:56:50,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 9 transitions, 53 flow [2022-11-23 01:56:50,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 9 transitions, 50 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 01:56:50,485 INFO L231 Difference]: Finished difference. Result has 14 places, 0 transitions, 0 flow [2022-11-23 01:56:50,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=14, PETRI_TRANSITIONS=0} [2022-11-23 01:56:50,488 INFO L288 CegarLoopForPetriNet]: 16 programPoint places, -2 predicate places. [2022-11-23 01:56:50,490 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 0 transitions, 0 flow [2022-11-23 01:56:50,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 01:56:50,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2022-11-23 01:56:50,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2022-11-23 01:56:50,495 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2022-11-23 01:56:50,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2022-11-23 01:56:50,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2022-11-23 01:56:50,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2022-11-23 01:56:50,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 01:56:50,498 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-23 01:56:50,503 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 01:56:50,504 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 01:56:50,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:56:50 BasicIcfg [2022-11-23 01:56:50,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 01:56:50,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 01:56:50,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 01:56:50,517 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 01:56:50,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:45" (3/4) ... [2022-11-23 01:56:50,522 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 01:56:50,530 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2022-11-23 01:56:50,538 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-23 01:56:50,538 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 01:56:50,539 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 01:56:50,597 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/bin/uautomizer-QkZJyEgLgS/witness.graphml [2022-11-23 01:56:50,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 01:56:50,603 INFO L158 Benchmark]: Toolchain (without parser) took 7015.14ms. Allocated memory was 125.8MB in the beginning and 211.8MB in the end (delta: 86.0MB). Free memory was 62.3MB in the beginning and 146.2MB in the end (delta: -83.9MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2022-11-23 01:56:50,603 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 125.8MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 01:56:50,607 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1099.86ms. Allocated memory was 125.8MB in the beginning and 176.2MB in the end (delta: 50.3MB). Free memory was 62.1MB in the beginning and 135.4MB in the end (delta: -73.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-23 01:56:50,608 INFO L158 Benchmark]: Boogie Procedure Inliner took 88.76ms. Allocated memory is still 176.2MB. Free memory was 135.4MB in the beginning and 133.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 01:56:50,608 INFO L158 Benchmark]: Boogie Preprocessor took 56.22ms. Allocated memory is still 176.2MB. Free memory was 133.1MB in the beginning and 132.2MB in the end (delta: 912.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 01:56:50,609 INFO L158 Benchmark]: RCFGBuilder took 545.53ms. Allocated memory is still 176.2MB. Free memory was 132.1MB in the beginning and 118.6MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 01:56:50,609 INFO L158 Benchmark]: TraceAbstraction took 5128.36ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 117.7MB in the beginning and 148.3MB in the end (delta: -30.7MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-11-23 01:56:50,610 INFO L158 Benchmark]: Witness Printer took 83.71ms. Allocated memory is still 211.8MB. Free memory was 148.3MB in the beginning and 146.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 01:56:50,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 125.8MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1099.86ms. Allocated memory was 125.8MB in the beginning and 176.2MB in the end (delta: 50.3MB). Free memory was 62.1MB in the beginning and 135.4MB in the end (delta: -73.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 88.76ms. Allocated memory is still 176.2MB. Free memory was 135.4MB in the beginning and 133.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.22ms. Allocated memory is still 176.2MB. Free memory was 133.1MB in the beginning and 132.2MB in the end (delta: 912.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 545.53ms. Allocated memory is still 176.2MB. Free memory was 132.1MB in the beginning and 118.6MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5128.36ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 117.7MB in the beginning and 148.3MB in the end (delta: -30.7MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Witness Printer took 83.71ms. Allocated memory is still 211.8MB. Free memory was 148.3MB in the beginning and 146.2MB 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, 60 PlacesBefore, 16 PlacesAfterwards, 56 TransitionsBefore, 12 TransitionsAfterwards, 336 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 423 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 371, independent: 327, independent conditional: 0, independent unconditional: 327, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 243, independent: 229, independent conditional: 0, independent unconditional: 229, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 243, independent: 219, independent conditional: 0, independent unconditional: 219, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, independent: 10, independent conditional: 0, independent unconditional: 10, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 206, independent: 83, independent conditional: 0, independent unconditional: 83, dependent: 123, dependent conditional: 0, dependent unconditional: 123, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 371, independent: 98, independent conditional: 0, independent unconditional: 98, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 243, unknown conditional: 0, unknown unconditional: 243] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 7, Positive conditional cache size: 0, Positive unconditional cache size: 7, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, 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: 928]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 77 locations, 6 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: 4.9s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 140 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 152 IncrementalHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 16 mSDtfsCounter, 152 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 14, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 01:56:50,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de2ae5a-e3d9-4e07-97ce-397d79e48148/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