./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/04-mutex_54-pt_rwlock_ww.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/04-mutex_54-pt_rwlock_ww.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 a0d4dc1bad36ea6a944d96610a1da4f49d6f4e54f23122f87b052f14d480b584 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:02:47,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:02:47,989 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:02:47,993 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:02:47,994 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:02:48,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:02:48,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:02:48,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:02:48,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:02:48,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:02:48,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:02:48,023 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:02:48,024 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:02:48,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:02:48,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:02:48,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:02:48,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:02:48,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:02:48,027 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:02:48,028 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:02:48,029 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:02:48,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:02:48,030 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:02:48,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:02:48,031 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:02:48,032 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:02:48,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:02:48,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:02:48,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:02:48,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:48,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:02:48,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:02:48,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:02:48,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:02:48,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:02:48,037 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:02:48,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:02:48,038 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:02:48,038 INFO L153 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_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4dc1bad36ea6a944d96610a1da4f49d6f4e54f23122f87b052f14d480b584 [2023-11-19 08:02:48,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:02:48,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:02:48,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:02:48,379 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:02:48,380 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:02:48,382 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/04-mutex_54-pt_rwlock_ww.i [2023-11-19 08:02:51,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:02:51,823 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:02:51,825 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/sv-benchmarks/c/goblint-regression/04-mutex_54-pt_rwlock_ww.i [2023-11-19 08:02:51,848 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/data/fe22c415d/fc9b12b59c434fb5b84d774df4ceeb0d/FLAG1058f76a1 [2023-11-19 08:02:51,866 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/data/fe22c415d/fc9b12b59c434fb5b84d774df4ceeb0d [2023-11-19 08:02:51,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:02:51,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:02:51,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:51,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:02:51,885 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:02:51,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:51" (1/1) ... [2023-11-19 08:02:51,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348ff283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:51, skipping insertion in model container [2023-11-19 08:02:51,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:51" (1/1) ... [2023-11-19 08:02:51,951 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:02:52,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:52,442 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:02:52,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:52,599 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:02:52,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52 WrapperNode [2023-11-19 08:02:52,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:52,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:52,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:02:52,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:02:52,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,682 INFO L138 Inliner]: procedures = 263, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2023-11-19 08:02:52,682 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:52,683 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:02:52,684 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:02:52,684 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:02:52,694 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,713 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,738 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:02:52,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:02:52,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:02:52,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:02:52,750 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (1/1) ... [2023-11-19 08:02:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:52,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:52,803 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:02:52,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:02:52,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:02:52,857 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockWriteLock [2023-11-19 08:02:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:02:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockUnlock [2023-11-19 08:02:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:02:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:02:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:02:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 08:02:52,873 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 08:02:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:02:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:02:52,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:02:52,875 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:02:53,026 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:02:53,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:02:53,245 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:02:53,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:02:53,255 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 08:02:53,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:53 BoogieIcfgContainer [2023-11-19 08:02:53,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:02:53,262 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:02:53,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:02:53,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:02:53,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:51" (1/3) ... [2023-11-19 08:02:53,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d37bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:53, skipping insertion in model container [2023-11-19 08:02:53,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:52" (2/3) ... [2023-11-19 08:02:53,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d37bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:53, skipping insertion in model container [2023-11-19 08:02:53,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:53" (3/3) ... [2023-11-19 08:02:53,270 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_54-pt_rwlock_ww.i [2023-11-19 08:02:53,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:02:53,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-19 08:02:53,293 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:02:53,343 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 08:02:53,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 63 transitions, 133 flow [2023-11-19 08:02:53,417 INFO L124 PetriNetUnfolderBase]: 0/62 cut-off events. [2023-11-19 08:02:53,417 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:02:53,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 62 events. 0/62 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-19 08:02:53,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 63 transitions, 133 flow [2023-11-19 08:02:53,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 57 transitions, 120 flow [2023-11-19 08:02:53,429 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:02:53,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 57 transitions, 120 flow [2023-11-19 08:02:53,443 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 57 transitions, 120 flow [2023-11-19 08:02:53,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 120 flow [2023-11-19 08:02:53,465 INFO L124 PetriNetUnfolderBase]: 0/57 cut-off events. [2023-11-19 08:02:53,465 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:02:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 57 events. 0/57 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-19 08:02:53,467 INFO L119 LiptonReduction]: Number of co-enabled transitions 286 [2023-11-19 08:02:55,925 INFO L134 LiptonReduction]: Checked pairs total: 327 [2023-11-19 08:02:55,925 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-11-19 08:02:55,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:55,948 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;@5862f217, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:55,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:02:55,949 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:02:55,950 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:02:55,950 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:02:55,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:55,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:02:55,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-19 08:02:55,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash 226, now seen corresponding path program 1 times [2023-11-19 08:02:55,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:55,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875220648] [2023-11-19 08:02:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:55,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:56,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875220648] [2023-11-19 08:02:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875220648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:56,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:02:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043828558] [2023-11-19 08:02:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:56,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:02:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:02:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:56,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 120 [2023-11-19 08:02:56,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 12 transitions, 30 flow. Second operand has 2 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:56,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 120 [2023-11-19 08:02:56,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:56,210 INFO L124 PetriNetUnfolderBase]: 8/26 cut-off events. [2023-11-19 08:02:56,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:02:56,211 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 47 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. [2023-11-19 08:02:56,213 INFO L140 encePairwiseOnDemand]: 118/120 looper letters, 10 selfloop transitions, 0 changer transitions 0/10 dead transitions. [2023-11-19 08:02:56,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 46 flow [2023-11-19 08:02:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:02:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:02:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 134 transitions. [2023-11-19 08:02:56,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2023-11-19 08:02:56,229 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 134 transitions. [2023-11-19 08:02:56,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 134 transitions. [2023-11-19 08:02:56,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:56,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 134 transitions. [2023-11-19 08:02:56,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.0) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,243 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) [2023-11-19 08:02:56,245 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) [2023-11-19 08:02:56,247 INFO L175 Difference]: Start difference. First operand has 16 places, 12 transitions, 30 flow. Second operand 2 states and 134 transitions. [2023-11-19 08:02:56,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 46 flow [2023-11-19 08:02:56,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:02:56,252 INFO L231 Difference]: Finished difference. Result has 13 places, 10 transitions, 22 flow [2023-11-19 08:02:56,254 INFO L264 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} [2023-11-19 08:02:56,259 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -3 predicate places. [2023-11-19 08:02:56,260 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 10 transitions, 22 flow [2023-11-19 08:02:56,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 61.5) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:56,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:02:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:02:56,262 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)] === [2023-11-19 08:02:56,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash 6841424, now seen corresponding path program 1 times [2023-11-19 08:02:56,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:56,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872252918] [2023-11-19 08:02:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:56,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872252918] [2023-11-19 08:02:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872252918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:56,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:56,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:02:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773178583] [2023-11-19 08:02:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:56,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:56,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 120 [2023-11-19 08:02:56,587 INFO L103 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) [2023-11-19 08:02:56,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:56,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 120 [2023-11-19 08:02:56,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:56,613 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-11-19 08:02:56,613 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:02:56,614 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 31 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. [2023-11-19 08:02:56,614 INFO L140 encePairwiseOnDemand]: 117/120 looper letters, 7 selfloop transitions, 2 changer transitions 0/9 dead transitions. [2023-11-19 08:02:56,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 9 transitions, 38 flow [2023-11-19 08:02:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-19 08:02:56,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2023-11-19 08:02:56,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-19 08:02:56,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-19 08:02:56,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:56,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-19 08:02:56,631 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) [2023-11-19 08:02:56,633 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) [2023-11-19 08:02:56,633 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) [2023-11-19 08:02:56,633 INFO L175 Difference]: Start difference. First operand has 13 places, 10 transitions, 22 flow. Second operand 3 states and 175 transitions. [2023-11-19 08:02:56,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 9 transitions, 38 flow [2023-11-19 08:02:56,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:02:56,635 INFO L231 Difference]: Finished difference. Result has 14 places, 9 transitions, 24 flow [2023-11-19 08:02:56,635 INFO L264 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} [2023-11-19 08:02:56,637 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -2 predicate places. [2023-11-19 08:02:56,640 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 9 transitions, 24 flow [2023-11-19 08:02:56,641 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) [2023-11-19 08:02:56,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:56,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:02:56,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:02:56,641 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)] === [2023-11-19 08:02:56,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash 6841423, now seen corresponding path program 1 times [2023-11-19 08:02:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:56,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097541486] [2023-11-19 08:02:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:56,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:56,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:56,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097541486] [2023-11-19 08:02:56,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097541486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:56,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:56,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532067351] [2023-11-19 08:02:56,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:56,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:56,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 120 [2023-11-19 08:02:56,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 9 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:56,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 120 [2023-11-19 08:02:56,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:56,833 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-19 08:02:56,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:02:56,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14 conditions, 4 events. 0/4 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 4/8 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-11-19 08:02:56,834 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 0 selfloop transitions, 0 changer transitions 4/4 dead transitions. [2023-11-19 08:02:56,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 4 transitions, 19 flow [2023-11-19 08:02:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-11-19 08:02:56,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2023-11-19 08:02:56,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-11-19 08:02:56,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-11-19 08:02:56,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:56,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-11-19 08:02:56,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,842 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) [2023-11-19 08:02:56,843 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) [2023-11-19 08:02:56,843 INFO L175 Difference]: Start difference. First operand has 14 places, 9 transitions, 24 flow. Second operand 3 states and 177 transitions. [2023-11-19 08:02:56,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 4 transitions, 19 flow [2023-11-19 08:02:56,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 4 transitions, 18 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:56,844 INFO L231 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2023-11-19 08:02:56,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=10, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=10, PETRI_TRANSITIONS=0} [2023-11-19 08:02:56,846 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, -6 predicate places. [2023-11-19 08:02:56,849 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2023-11-19 08:02:56,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:02:56,852 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-11-19 08:02:56,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-11-19 08:02:56,853 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-19 08:02:56,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-19 08:02:56,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-19 08:02:56,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-11-19 08:02:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:02:56,855 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 08:02:56,861 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-19 08:02:56,861 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 08:02:56,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:02:56 BasicIcfg [2023-11-19 08:02:56,868 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 08:02:56,868 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 08:02:56,869 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 08:02:56,869 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 08:02:56,870 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:53" (3/4) ... [2023-11-19 08:02:56,872 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 08:02:56,876 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-11-19 08:02:56,882 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-19 08:02:56,884 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 08:02:56,884 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 08:02:56,974 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 08:02:56,974 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 08:02:56,974 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 08:02:56,975 INFO L158 Benchmark]: Toolchain (without parser) took 5098.50ms. Allocated memory was 151.0MB in the beginning and 192.9MB in the end (delta: 41.9MB). Free memory was 108.2MB in the beginning and 119.3MB in the end (delta: -11.1MB). Peak memory consumption was 32.6MB. Max. memory is 16.1GB. [2023-11-19 08:02:56,976 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 151.0MB. Free memory is still 92.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:02:56,976 INFO L158 Benchmark]: CACSL2BoogieTranslator took 721.13ms. Allocated memory is still 151.0MB. Free memory was 107.9MB in the beginning and 80.7MB in the end (delta: 27.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-19 08:02:56,976 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.00ms. Allocated memory is still 151.0MB. Free memory was 80.7MB in the beginning and 78.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 08:02:56,977 INFO L158 Benchmark]: Boogie Preprocessor took 57.83ms. Allocated memory is still 151.0MB. Free memory was 78.3MB in the beginning and 77.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 08:02:56,977 INFO L158 Benchmark]: RCFGBuilder took 517.85ms. Allocated memory was 151.0MB in the beginning and 192.9MB in the end (delta: 41.9MB). Free memory was 77.0MB in the beginning and 152.7MB in the end (delta: -75.7MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2023-11-19 08:02:56,978 INFO L158 Benchmark]: TraceAbstraction took 3606.20ms. Allocated memory is still 192.9MB. Free memory was 151.6MB in the beginning and 123.5MB in the end (delta: 28.1MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2023-11-19 08:02:56,978 INFO L158 Benchmark]: Witness Printer took 106.05ms. Allocated memory is still 192.9MB. Free memory was 123.5MB in the beginning and 119.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 08:02:56,981 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 151.0MB. Free memory is still 92.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 721.13ms. Allocated memory is still 151.0MB. Free memory was 107.9MB in the beginning and 80.7MB in the end (delta: 27.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.00ms. Allocated memory is still 151.0MB. Free memory was 80.7MB in the beginning and 78.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.83ms. Allocated memory is still 151.0MB. Free memory was 78.3MB in the beginning and 77.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 517.85ms. Allocated memory was 151.0MB in the beginning and 192.9MB in the end (delta: 41.9MB). Free memory was 77.0MB in the beginning and 152.7MB in the end (delta: -75.7MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * TraceAbstraction took 3606.20ms. Allocated memory is still 192.9MB. Free memory was 151.6MB in the beginning and 123.5MB in the end (delta: 28.1MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. * Witness Printer took 106.05ms. Allocated memory is still 192.9MB. Free memory was 123.5MB in the beginning and 119.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 61 PlacesBefore, 16 PlacesAfterwards, 57 TransitionsBefore, 12 TransitionsAfterwards, 286 CoEnabledTransitionPairs, 5 FixpointIterations, 37 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 57 TotalNumberOfCompositions, 327 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 254, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 161, independent: 150, independent conditional: 0, independent unconditional: 150, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 254, independent: 66, independent conditional: 0, independent unconditional: 66, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 161, unknown conditional: 0, unknown unconditional: 161] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, 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: 927]: 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: 3.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 16 mSDtfsCounter, 68 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 8, 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, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 38 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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! [2023-11-19 08:02:57,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f843634f-de90-40f0-9363-ef23dea77aab/bin/uautomizer-verify-uCwYo4JHxu/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