./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c --- 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-5e519f3 [2022-11-02 20:38:45,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:38:45,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:38:45,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:38:45,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:38:45,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:38:45,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:38:45,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:38:45,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:38:45,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:38:45,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:38:45,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:38:45,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:38:45,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:38:45,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:38:45,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:38:45,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:38:45,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:38:45,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:38:45,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:38:45,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:38:45,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:38:45,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:38:45,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:38:45,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:38:45,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:38:45,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:38:45,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:38:45,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:38:45,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:38:45,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:38:45,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:38:45,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:38:45,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:38:45,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:38:45,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:38:45,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:38:45,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:38:45,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:38:45,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:38:45,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:38:45,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-11-02 20:38:45,953 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:38:45,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:38:45,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:38:45,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:38:45,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:38:45,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:38:45,956 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:38:45,957 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-02 20:38:45,957 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-02 20:38:45,957 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-02 20:38:45,957 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-02 20:38:45,958 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-02 20:38:45,958 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-02 20:38:45,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:38:45,959 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:38:45,959 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:38:45,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:38:45,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:38:45,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:38:45,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-02 20:38:45,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-02 20:38:45,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-02 20:38:45,961 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:38:45,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:38:45,962 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-02 20:38:45,962 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:38:45,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-02 20:38:45,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:38:45,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:38:45,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:38:45,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:38:45,965 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-02 20:38:45,965 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 882715956aab9fc92fb711e54ed51d64e792658e5015ed6151f84b857454f04c [2022-11-02 20:38:46,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:38:46,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:38:46,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:38:46,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:38:46,266 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:38:46,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/memsafety-ext/tree_stack.i [2022-11-02 20:38:46,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/data/c2cb5ec44/2bfc987c1b4c40bda2d8ebf5f6bc4152/FLAG41e907442 [2022-11-02 20:38:46,923 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:38:46,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/sv-benchmarks/c/memsafety-ext/tree_stack.i [2022-11-02 20:38:46,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/data/c2cb5ec44/2bfc987c1b4c40bda2d8ebf5f6bc4152/FLAG41e907442 [2022-11-02 20:38:47,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/data/c2cb5ec44/2bfc987c1b4c40bda2d8ebf5f6bc4152 [2022-11-02 20:38:47,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:38:47,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:38:47,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:38:47,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:38:47,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:38:47,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d2ceea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47, skipping insertion in model container [2022-11-02 20:38:47,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:38:47,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:38:47,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:38:47,667 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:38:47,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:38:47,724 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:38:47,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47 WrapperNode [2022-11-02 20:38:47,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:38:47,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:38:47,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:38:47,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:38:47,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,768 INFO L138 Inliner]: procedures = 123, calls = 44, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 122 [2022-11-02 20:38:47,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:38:47,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:38:47,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:38:47,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:38:47,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:38:47,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:38:47,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:38:47,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:38:47,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (1/1) ... [2022-11-02 20:38:47,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:38:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:38:47,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:38:47,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-02 20:38:47,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:38:47,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:38:47,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:38:47,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:38:47,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:38:47,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:38:47,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:38:47,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:38:48,053 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:38:48,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:38:48,368 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:38:48,374 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:38:48,374 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:38:48,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:38:48 BoogieIcfgContainer [2022-11-02 20:38:48,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:38:48,377 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-02 20:38:48,378 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-02 20:38:48,383 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-02 20:38:48,384 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:38:48,384 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.11 08:38:47" (1/3) ... [2022-11-02 20:38:48,385 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@141c9b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 08:38:48, skipping insertion in model container [2022-11-02 20:38:48,385 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:38:48,386 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:38:47" (2/3) ... [2022-11-02 20:38:48,386 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@141c9b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 08:38:48, skipping insertion in model container [2022-11-02 20:38:48,386 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:38:48,386 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:38:48" (3/3) ... [2022-11-02 20:38:48,388 INFO L332 chiAutomizerObserver]: Analyzing ICFG tree_stack.i [2022-11-02 20:38:48,473 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-02 20:38:48,474 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-02 20:38:48,474 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-02 20:38:48,474 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-02 20:38:48,474 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-02 20:38:48,474 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-02 20:38:48,474 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-02 20:38:48,475 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-02 20:38:48,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:48,502 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2022-11-02 20:38:48,502 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:38:48,503 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:38:48,509 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:38:48,510 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:38:48,511 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-02 20:38:48,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:48,514 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2022-11-02 20:38:48,515 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:38:48,515 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:38:48,515 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:38:48,515 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:38:48,529 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~malloc21#1.base, main_#t~malloc21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~mem23#1.base, main_#t~mem23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~malloc25#1.base, main_#t~malloc25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~mem27#1.base, main_#t~mem27#1.offset, main_#t~malloc28#1.base, main_#t~malloc28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 15#L549-2true [2022-11-02 20:38:48,533 INFO L750 eck$LassoCheckResult]: Loop: 15#L549-2true assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 20#L539-2true assume !true; 13#L538-5true call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 9#L544true assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc13#1.base, main_#t~malloc13#1.offset;call main_#t~mem14#1.base, main_#t~mem14#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem14#1.base, main_#t~mem14#1.offset, 4);havoc main_#t~mem14#1.base, main_#t~mem14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset; 6#L544-2true call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 19#L549true assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 15#L549-2true [2022-11-02 20:38:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-02 20:38:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:48,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028918414] [2022-11-02 20:38:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:48,686 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:48,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2022-11-02 20:38:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:48,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673637460] [2022-11-02 20:38:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:38:48,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:48,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673637460] [2022-11-02 20:38:48,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673637460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:38:48,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:38:48,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:38:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232949063] [2022-11-02 20:38:48,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:38:48,905 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-02 20:38:48,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:38:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:38:48,939 INFO L87 Difference]: Start difference. First operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:48,946 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-11-02 20:38:48,948 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 29 transitions. [2022-11-02 20:38:48,949 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2022-11-02 20:38:48,952 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 17 states and 25 transitions. [2022-11-02 20:38:48,954 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-11-02 20:38:48,954 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2022-11-02 20:38:48,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 25 transitions. [2022-11-02 20:38:48,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:38:48,955 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 25 transitions. [2022-11-02 20:38:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 25 transitions. [2022-11-02 20:38:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-02 20:38:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2022-11-02 20:38:48,981 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 25 transitions. [2022-11-02 20:38:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:38:48,985 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2022-11-02 20:38:48,985 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-02 20:38:48,985 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 25 transitions. [2022-11-02 20:38:48,986 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2022-11-02 20:38:48,986 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:38:48,986 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:38:48,987 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:38:48,987 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:48,987 INFO L748 eck$LassoCheckResult]: Stem: 56#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 57#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~malloc21#1.base, main_#t~malloc21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~mem23#1.base, main_#t~mem23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~malloc25#1.base, main_#t~malloc25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~mem27#1.base, main_#t~mem27#1.offset, main_#t~malloc28#1.base, main_#t~malloc28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 63#L549-2 [2022-11-02 20:38:48,988 INFO L750 eck$LassoCheckResult]: Loop: 63#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 53#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 64#L538-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 50#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 51#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 62#L544 assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_~n~0#1.base, main_~n~0#1.offset, 4);havoc main_#t~malloc13#1.base, main_#t~malloc13#1.offset;call main_#t~mem14#1.base, main_#t~mem14#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem14#1.base, main_#t~mem14#1.offset, 4);havoc main_#t~mem14#1.base, main_#t~mem14#1.offset;call main_#t~mem15#1.base, main_#t~mem15#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);call write~$Pointer$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset; 54#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 55#L549 assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 63#L549-2 [2022-11-02 20:38:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2022-11-02 20:38:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:48,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267365205] [2022-11-02 20:38:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:48,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:49,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:49,022 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2022-11-02 20:38:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:49,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144317918] [2022-11-02 20:38:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:38:49,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144317918] [2022-11-02 20:38:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144317918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:38:49,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:38:49,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:38:49,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177186646] [2022-11-02 20:38:49,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:38:49,687 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-02 20:38:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:49,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:38:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:38:49,689 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. cyclomatic complexity: 10 Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:49,862 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-02 20:38:49,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 35 transitions. [2022-11-02 20:38:49,865 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2022-11-02 20:38:49,872 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 35 transitions. [2022-11-02 20:38:49,872 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2022-11-02 20:38:49,873 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2022-11-02 20:38:49,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2022-11-02 20:38:49,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:38:49,873 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-11-02 20:38:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2022-11-02 20:38:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-11-02 20:38:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-11-02 20:38:49,884 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-11-02 20:38:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:38:49,885 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-11-02 20:38:49,886 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-02 20:38:49,887 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2022-11-02 20:38:49,888 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2022-11-02 20:38:49,888 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:38:49,889 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:38:49,889 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:38:49,889 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:49,890 INFO L748 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 108#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~malloc21#1.base, main_#t~malloc21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~mem23#1.base, main_#t~mem23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~malloc25#1.base, main_#t~malloc25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~mem27#1.base, main_#t~mem27#1.offset, main_#t~malloc28#1.base, main_#t~malloc28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 114#L549-2 [2022-11-02 20:38:49,890 INFO L750 eck$LassoCheckResult]: Loop: 114#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 104#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 115#L538-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 116#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 120#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 113#L544 assume !((main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1);havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1; 105#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 106#L549 assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 114#L549-2 [2022-11-02 20:38:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2022-11-02 20:38:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569805581] [2022-11-02 20:38:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:49,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:49,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2022-11-02 20:38:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737119011] [2022-11-02 20:38:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:49,950 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:49,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2022-11-02 20:38:49,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:49,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892309268] [2022-11-02 20:38:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:38:50,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892309268] [2022-11-02 20:38:50,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892309268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:38:50,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:38:50,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:38:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482059657] [2022-11-02 20:38:50,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:38:50,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:38:50,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:38:50,548 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. cyclomatic complexity: 11 Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:50,754 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-11-02 20:38:50,754 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 46 transitions. [2022-11-02 20:38:50,755 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2022-11-02 20:38:50,756 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 46 transitions. [2022-11-02 20:38:50,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2022-11-02 20:38:50,756 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2022-11-02 20:38:50,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 46 transitions. [2022-11-02 20:38:50,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:38:50,757 INFO L218 hiAutomatonCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-11-02 20:38:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 46 transitions. [2022-11-02 20:38:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-02 20:38:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-11-02 20:38:50,760 INFO L240 hiAutomatonCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-11-02 20:38:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:38:50,764 INFO L428 stractBuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-11-02 20:38:50,764 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-02 20:38:50,764 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 39 transitions. [2022-11-02 20:38:50,765 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2022-11-02 20:38:50,766 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:38:50,766 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:38:50,766 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-02 20:38:50,766 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:50,767 INFO L748 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2); 173#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset, main_#t~nondet8#1, main_#t~mem9#1.base, main_#t~mem9#1.offset, main_#t~mem10#1.base, main_#t~mem10#1.offset, main_#t~mem5#1.base, main_#t~mem5#1.offset, main_#t~mem6#1.base, main_#t~mem6#1.offset, main_#t~short7#1, main_#t~mem11#1.base, main_#t~mem11#1.offset, main_#t~nondet12#1, main_#t~malloc13#1.base, main_#t~malloc13#1.offset, main_#t~mem14#1.base, main_#t~mem14#1.offset, main_#t~mem15#1.base, main_#t~mem15#1.offset, main_#t~mem16#1.base, main_#t~mem16#1.offset, main_#t~nondet17#1, main_#t~malloc18#1.base, main_#t~malloc18#1.offset, main_#t~mem19#1.base, main_#t~mem19#1.offset, main_#t~mem20#1.base, main_#t~mem20#1.offset, main_#t~nondet4#1, main_#t~malloc21#1.base, main_#t~malloc21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~mem23#1.base, main_#t~mem23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~malloc25#1.base, main_#t~malloc25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~mem27#1.base, main_#t~mem27#1.offset, main_#t~malloc28#1.base, main_#t~malloc28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~s~0#1.base, main_~s~0#1.offset, main_~st~0#1.base, main_~st~0#1.offset;call main_#t~malloc3#1.base, main_#t~malloc3#1.offset := #Ultimate.allocOnHeap(8);main_~root~0#1.base, main_~root~0#1.offset := main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_#t~malloc3#1.base, main_#t~malloc3#1.offset;havoc main_~n~0#1.base, main_~n~0#1.offset;call write~$Pointer$(0, 0, main_~root~0#1.base, main_~root~0#1.offset, 4);call write~$Pointer$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 181#L549-2 [2022-11-02 20:38:50,767 INFO L750 eck$LassoCheckResult]: Loop: 181#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 185#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 182#L538-1 assume !main_#t~short7#1; 183#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 194#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 193#L544 assume !((main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1);havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1; 192#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 191#L549 assume !((main_#t~mem16#1.base == 0 && main_#t~mem16#1.offset == 0) && 0 != main_#t~nondet17#1);havoc main_#t~mem16#1.base, main_#t~mem16#1.offset;havoc main_#t~nondet17#1; 181#L549-2 [2022-11-02 20:38:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2022-11-02 20:38:50,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851770355] [2022-11-02 20:38:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:50,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:50,789 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:50,796 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2022-11-02 20:38:50,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843942893] [2022-11-02 20:38:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:50,815 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:50,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2022-11-02 20:38:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:50,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097351670] [2022-11-02 20:38:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:50,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:50,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:38:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:51,591 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:38:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:38:51,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.11 08:38:51 BoogieIcfgContainer [2022-11-02 20:38:51,641 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-02 20:38:51,641 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:38:51,641 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:38:51,642 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:38:51,642 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:38:48" (3/4) ... [2022-11-02 20:38:51,647 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-11-02 20:38:51,687 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 20:38:51,688 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:38:51,694 INFO L158 Benchmark]: Toolchain (without parser) took 4460.31ms. Allocated memory was 115.3MB in the beginning and 155.2MB in the end (delta: 39.8MB). Free memory was 77.3MB in the beginning and 113.0MB in the end (delta: -35.8MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. [2022-11-02 20:38:51,694 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 115.3MB. Free memory was 94.8MB in the beginning and 94.6MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:38:51,695 INFO L158 Benchmark]: CACSL2BoogieTranslator took 491.52ms. Allocated memory is still 115.3MB. Free memory was 77.0MB in the beginning and 84.3MB in the end (delta: -7.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:38:51,695 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.49ms. Allocated memory is still 115.3MB. Free memory was 83.8MB in the beginning and 81.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:38:51,696 INFO L158 Benchmark]: Boogie Preprocessor took 36.44ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 80.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:38:51,698 INFO L158 Benchmark]: RCFGBuilder took 570.63ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 56.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-02 20:38:51,700 INFO L158 Benchmark]: BuchiAutomizer took 3263.49ms. Allocated memory was 115.3MB in the beginning and 155.2MB in the end (delta: 39.8MB). Free memory was 56.0MB in the beginning and 115.1MB in the end (delta: -59.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:38:51,701 INFO L158 Benchmark]: Witness Printer took 46.47ms. Allocated memory is still 155.2MB. Free memory was 115.1MB in the beginning and 113.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:38:51,703 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 115.3MB. Free memory was 94.8MB in the beginning and 94.6MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 491.52ms. Allocated memory is still 115.3MB. Free memory was 77.0MB in the beginning and 84.3MB in the end (delta: -7.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.49ms. Allocated memory is still 115.3MB. Free memory was 83.8MB in the beginning and 81.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.44ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 80.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 570.63ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 56.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * BuchiAutomizer took 3263.49ms. Allocated memory was 115.3MB in the beginning and 155.2MB in the end (delta: 39.8MB). Free memory was 56.0MB in the beginning and 115.1MB in the end (delta: -59.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 46.47ms. Allocated memory is still 155.2MB. Free memory was 115.1MB in the beginning and 113.0MB 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: Constructed decomposition of program Your program was decomposed into 3 terminating modules (3 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.3 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.1s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.5s. Construction of modules took 0.2s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 128 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 60 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 100 IncrementalHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 68 mSDtfsCounter, 100 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 536]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] root->left = ((void *)0) [L535] root->right = ((void *)0) VAL [root={26980:0}] Loop: [L536] COND TRUE __VERIFIER_nondet_int() [L537] n = root [L538] EXPR n->left [L538] n->left && n->right [L538] COND FALSE !(n->left && n->right) [L544] EXPR n->left [L544] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L549] EXPR n->right [L549] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 536]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L533] struct TreeNode* root = malloc(sizeof(*root)), *n; [L534] root->left = ((void *)0) [L535] root->right = ((void *)0) VAL [root={26980:0}] Loop: [L536] COND TRUE __VERIFIER_nondet_int() [L537] n = root [L538] EXPR n->left [L538] n->left && n->right [L538] COND FALSE !(n->left && n->right) [L544] EXPR n->left [L544] COND FALSE !(!n->left && __VERIFIER_nondet_int()) [L549] EXPR n->right [L549] COND FALSE !(!n->right && __VERIFIER_nondet_int()) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2022-11-02 20:38:51,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f05eb3e6-e257-4ac5-b84d-05a4205d46fd/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)