./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt --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 a0142cb115f7d1e16772bca3adcba9f1aba5ac12 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:46:26,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:46:26,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:46:26,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:46:26,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:46:26,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:46:26,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:46:26,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:46:26,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:46:26,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:46:26,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:46:26,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:46:26,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:46:26,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:46:26,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:46:26,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:46:26,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:46:26,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:46:26,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:46:26,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:46:26,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:46:26,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:46:26,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:46:26,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:46:27,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:46:27,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:46:27,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:46:27,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:46:27,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:46:27,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:46:27,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:46:27,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:46:27,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:46:27,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:46:27,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:46:27,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:46:27,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:46:27,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:46:27,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:46:27,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:46:27,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:46:27,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-13 00:46:27,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:46:27,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:46:27,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:46:27,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:46:27,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:46:27,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:46:27,092 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:46:27,093 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 00:46:27,093 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 00:46:27,093 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 00:46:27,094 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 00:46:27,095 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 00:46:27,095 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 00:46:27,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:46:27,096 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:46:27,096 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:46:27,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:46:27,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:46:27,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:46:27,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 00:46:27,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 00:46:27,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 00:46:27,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:46:27,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:46:27,099 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 00:46:27,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:46:27,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 00:46:27,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:46:27,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:46:27,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:46:27,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:46:27,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:46:27,105 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 00:46:27,105 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_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0142cb115f7d1e16772bca3adcba9f1aba5ac12 [2021-10-13 00:46:27,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:46:27,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:46:27,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:46:27,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:46:27,576 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:46:27,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/memsafety-ext/tree_stack.i [2021-10-13 00:46:27,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/data/870454115/a2c88ae9b26e44b0b4158f782e6ccc1b/FLAG85ea4431c [2021-10-13 00:46:28,296 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:46:28,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/sv-benchmarks/c/memsafety-ext/tree_stack.i [2021-10-13 00:46:28,314 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/data/870454115/a2c88ae9b26e44b0b4158f782e6ccc1b/FLAG85ea4431c [2021-10-13 00:46:28,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/data/870454115/a2c88ae9b26e44b0b4158f782e6ccc1b [2021-10-13 00:46:28,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:46:28,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:46:28,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:46:28,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:46:28,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:46:28,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:46:28" (1/1) ... [2021-10-13 00:46:28,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b355fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:28, skipping insertion in model container [2021-10-13 00:46:28,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:46:28" (1/1) ... [2021-10-13 00:46:28,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:46:28,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:46:29,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:46:29,191 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:46:29,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:46:29,285 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:46:29,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29 WrapperNode [2021-10-13 00:46:29,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:46:29,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:46:29,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:46:29,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:46:29,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:46:29,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:46:29,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:46:29,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:46:29,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:46:29,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:46:29,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:46:29,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:46:29,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (1/1) ... [2021-10-13 00:46:29,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:46:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:46:29,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:46:29,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 00:46:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:46:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:46:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:46:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:46:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:46:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:46:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:46:29,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:46:30,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:46:30,242 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 00:46:30,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:46:30 BoogieIcfgContainer [2021-10-13 00:46:30,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:46:30,246 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 00:46:30,246 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 00:46:30,254 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 00:46:30,255 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:46:30,255 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 12:46:28" (1/3) ... [2021-10-13 00:46:30,264 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3fb49597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:46:30, skipping insertion in model container [2021-10-13 00:46:30,265 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:46:30,265 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:46:29" (2/3) ... [2021-10-13 00:46:30,265 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3fb49597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:46:30, skipping insertion in model container [2021-10-13 00:46:30,265 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:46:30,266 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:46:30" (3/3) ... [2021-10-13 00:46:30,267 INFO L389 chiAutomizerObserver]: Analyzing ICFG tree_stack.i [2021-10-13 00:46:30,323 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 00:46:30,323 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 00:46:30,323 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 00:46:30,323 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 00:46:30,324 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 00:46:30,324 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 00:46:30,324 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 00:46:30,324 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 00:46:30,342 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) [2021-10-13 00:46:30,371 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-10-13 00:46:30,373 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:46:30,373 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:46:30,381 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-13 00:46:30,381 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:46:30,381 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 00:46:30,382 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) [2021-10-13 00:46:30,384 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-10-13 00:46:30,385 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:46:30,385 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:46:30,388 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-13 00:46:30,388 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:46:30,397 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 12#L-1true havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 16#L549-2true [2021-10-13 00:46:30,397 INFO L793 eck$LassoCheckResult]: Loop: 16#L549-2true assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 21#L539-2true assume !true; 14#L538-5true call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 10#L544true assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc15.base, main_#t~malloc15.offset, main_~n~0.base, main_~n~0.offset, 4);havoc main_#t~malloc15.base, main_#t~malloc15.offset;call main_#t~mem16.base, main_#t~mem16.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem16.base, main_#t~mem16.offset, 4);havoc main_#t~mem16.base, main_#t~mem16.offset;call main_#t~mem17.base, main_#t~mem17.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset; 7#L544-2true call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 20#L549true assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 16#L549-2true [2021-10-13 00:46:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-10-13 00:46:30,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:30,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409501688] [2021-10-13 00:46:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:30,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:30,633 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:30,732 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2021-10-13 00:46:30,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:30,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734843285] [2021-10-13 00:46:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:30,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:30,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:30,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734843285] [2021-10-13 00:46:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734843285] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:30,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:30,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:46:30,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177920767] [2021-10-13 00:46:30,846 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:46:30,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:46:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:46:30,872 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) [2021-10-13 00:46:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:30,882 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-10-13 00:46:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:46:30,885 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 29 transitions. [2021-10-13 00:46:30,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-10-13 00:46:30,898 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 17 states and 25 transitions. [2021-10-13 00:46:30,900 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-13 00:46:30,901 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-10-13 00:46:30,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 25 transitions. [2021-10-13 00:46:30,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:46:30,903 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-10-13 00:46:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 25 transitions. [2021-10-13 00:46:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 00:46:30,934 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) [2021-10-13 00:46:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2021-10-13 00:46:30,938 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-10-13 00:46:30,939 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-10-13 00:46:30,939 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 00:46:30,939 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 25 transitions. [2021-10-13 00:46:30,943 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2021-10-13 00:46:30,943 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:46:30,944 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:46:30,945 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-13 00:46:30,945 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:46:30,945 INFO L791 eck$LassoCheckResult]: Stem: 56#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 57#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 63#L549-2 [2021-10-13 00:46:30,946 INFO L793 eck$LassoCheckResult]: Loop: 63#L549-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 53#L539-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 64#L538-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 50#L538-3 assume !main_#t~short9;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~short9; 51#L538-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 62#L544 assume (main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14;havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14;call main_#t~malloc15.base, main_#t~malloc15.offset := #Ultimate.allocOnHeap(8);call write~$Pointer$(main_#t~malloc15.base, main_#t~malloc15.offset, main_~n~0.base, main_~n~0.offset, 4);havoc main_#t~malloc15.base, main_#t~malloc15.offset;call main_#t~mem16.base, main_#t~mem16.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem16.base, main_#t~mem16.offset, 4);havoc main_#t~mem16.base, main_#t~mem16.offset;call main_#t~mem17.base, main_#t~mem17.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);call write~$Pointer$(0, 0, main_#t~mem17.base, 4 + main_#t~mem17.offset, 4);havoc main_#t~mem17.base, main_#t~mem17.offset; 54#L544-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 55#L549 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 63#L549-2 [2021-10-13 00:46:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:30,948 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-10-13 00:46:30,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:30,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707512307] [2021-10-13 00:46:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:30,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:31,004 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:31,062 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:31,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:31,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2021-10-13 00:46:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:31,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669949794] [2021-10-13 00:46:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:31,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:31,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:31,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669949794] [2021-10-13 00:46:31,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669949794] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:31,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:31,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:46:31,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887047442] [2021-10-13 00:46:31,357 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:46:31,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:46:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:31,359 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) [2021-10-13 00:46:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:31,503 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-10-13 00:46:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:46:31,504 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 35 transitions. [2021-10-13 00:46:31,506 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-10-13 00:46:31,509 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 35 transitions. [2021-10-13 00:46:31,509 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2021-10-13 00:46:31,509 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2021-10-13 00:46:31,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2021-10-13 00:46:31,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:46:31,510 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-10-13 00:46:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2021-10-13 00:46:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-10-13 00:46:31,513 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) [2021-10-13 00:46:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2021-10-13 00:46:31,514 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2021-10-13 00:46:31,515 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2021-10-13 00:46:31,515 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 00:46:31,515 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2021-10-13 00:46:31,516 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2021-10-13 00:46:31,516 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:46:31,516 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:46:31,517 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-13 00:46:31,517 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:46:31,517 INFO L791 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 108#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 114#L549-2 [2021-10-13 00:46:31,517 INFO L793 eck$LassoCheckResult]: Loop: 114#L549-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 104#L539-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 115#L538-1 assume main_#t~short9;call main_#t~mem8.base, main_#t~mem8.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4);main_#t~short9 := main_#t~mem8.base != 0 || main_#t~mem8.offset != 0; 116#L538-3 assume !main_#t~short9;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~short9; 120#L538-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 113#L544 assume !((main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14);havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14; 105#L544-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 106#L549 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 114#L549-2 [2021-10-13 00:46:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-10-13 00:46:31,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:31,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148875968] [2021-10-13 00:46:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:31,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:31,537 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:31,557 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2021-10-13 00:46:31,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:31,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283981471] [2021-10-13 00:46:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:31,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:31,571 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:31,585 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2021-10-13 00:46:31,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:31,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204761038] [2021-10-13 00:46:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:31,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:46:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:46:31,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:46:31,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204761038] [2021-10-13 00:46:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204761038] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:46:31,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:46:31,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 00:46:31,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357348497] [2021-10-13 00:46:32,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:46:32,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:46:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:46:32,125 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) [2021-10-13 00:46:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:46:32,394 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2021-10-13 00:46:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:46:32,396 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 46 transitions. [2021-10-13 00:46:32,398 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2021-10-13 00:46:32,399 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 46 transitions. [2021-10-13 00:46:32,399 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-13 00:46:32,400 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2021-10-13 00:46:32,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 46 transitions. [2021-10-13 00:46:32,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:46:32,400 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 46 transitions. [2021-10-13 00:46:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 46 transitions. [2021-10-13 00:46:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-13 00:46:32,409 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) [2021-10-13 00:46:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-10-13 00:46:32,413 INFO L704 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-10-13 00:46:32,413 INFO L587 BuchiCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-10-13 00:46:32,413 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 00:46:32,413 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 39 transitions. [2021-10-13 00:46:32,416 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 25 [2021-10-13 00:46:32,417 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:46:32,417 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:46:32,418 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-13 00:46:32,418 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:46:32,418 INFO L791 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(13); 173#L-1 havoc main_#res;havoc main_#t~malloc5.base, main_#t~malloc5.offset, main_#t~nondet10, main_#t~mem11.base, main_#t~mem11.offset, main_#t~mem12.base, main_#t~mem12.offset, main_#t~mem7.base, main_#t~mem7.offset, main_#t~mem8.base, main_#t~mem8.offset, main_#t~short9, main_#t~mem13.base, main_#t~mem13.offset, main_#t~nondet14, main_#t~malloc15.base, main_#t~malloc15.offset, main_#t~mem16.base, main_#t~mem16.offset, main_#t~mem17.base, main_#t~mem17.offset, main_#t~mem18.base, main_#t~mem18.offset, main_#t~nondet19, main_#t~malloc20.base, main_#t~malloc20.offset, main_#t~mem21.base, main_#t~mem21.offset, main_#t~mem22.base, main_#t~mem22.offset, main_#t~nondet6, main_#t~malloc23.base, main_#t~malloc23.offset, main_#t~mem24.base, main_#t~mem24.offset, main_#t~mem25.base, main_#t~mem25.offset, main_#t~mem26.base, main_#t~mem26.offset, main_#t~malloc27.base, main_#t~malloc27.offset, main_#t~mem28.base, main_#t~mem28.offset, main_#t~mem29.base, main_#t~mem29.offset, main_#t~malloc30.base, main_#t~malloc30.offset, main_#t~mem31.base, main_#t~mem31.offset, main_~root~0.base, main_~root~0.offset, main_~n~0.base, main_~n~0.offset, main_~s~0.base, main_~s~0.offset, main_~st~0.base, main_~st~0.offset;call main_#t~malloc5.base, main_#t~malloc5.offset := #Ultimate.allocOnHeap(8);main_~root~0.base, main_~root~0.offset := main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_#t~malloc5.base, main_#t~malloc5.offset;havoc main_~n~0.base, main_~n~0.offset;call write~$Pointer$(0, 0, main_~root~0.base, main_~root~0.offset, 4);call write~$Pointer$(0, 0, main_~root~0.base, 4 + main_~root~0.offset, 4); 181#L549-2 [2021-10-13 00:46:32,419 INFO L793 eck$LassoCheckResult]: Loop: 181#L549-2 assume !!(0 != main_#t~nondet6);havoc main_#t~nondet6;main_~n~0.base, main_~n~0.offset := main_~root~0.base, main_~root~0.offset; 185#L539-2 call main_#t~mem7.base, main_#t~mem7.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4);main_#t~short9 := main_#t~mem7.base != 0 || main_#t~mem7.offset != 0; 182#L538-1 assume !main_#t~short9; 183#L538-3 assume !main_#t~short9;havoc main_#t~mem7.base, main_#t~mem7.offset;havoc main_#t~mem8.base, main_#t~mem8.offset;havoc main_#t~short9; 194#L538-5 call main_#t~mem13.base, main_#t~mem13.offset := read~$Pointer$(main_~n~0.base, main_~n~0.offset, 4); 193#L544 assume !((main_#t~mem13.base == 0 && main_#t~mem13.offset == 0) && 0 != main_#t~nondet14);havoc main_#t~mem13.base, main_#t~mem13.offset;havoc main_#t~nondet14; 192#L544-2 call main_#t~mem18.base, main_#t~mem18.offset := read~$Pointer$(main_~n~0.base, 4 + main_~n~0.offset, 4); 191#L549 assume !((main_#t~mem18.base == 0 && main_#t~mem18.offset == 0) && 0 != main_#t~nondet19);havoc main_#t~mem18.base, main_#t~mem18.offset;havoc main_#t~nondet19; 181#L549-2 [2021-10-13 00:46:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-10-13 00:46:32,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:32,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753572921] [2021-10-13 00:46:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:32,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:32,448 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:32,488 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2021-10-13 00:46:32,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:32,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59345674] [2021-10-13 00:46:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:32,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:32,516 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:32,536 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:46:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2021-10-13 00:46:32,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:46:32,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404034534] [2021-10-13 00:46:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:46:32,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:46:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:32,566 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:46:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:46:32,609 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:46:33,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 12:46:33 BoogieIcfgContainer [2021-10-13 00:46:33,695 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 00:46:33,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:46:33,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:46:33,696 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:46:33,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:46:30" (3/4) ... [2021-10-13 00:46:33,700 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-13 00:46:33,770 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:46:33,771 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:46:33,772 INFO L168 Benchmark]: Toolchain (without parser) took 5197.30 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 54.4 MB in the beginning and 86.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:33,783 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 92.3 MB. Free memory is still 71.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:46:33,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.71 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 54.2 MB in the beginning and 102.7 MB in the end (delta: -48.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:33,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.08 ms. Allocated memory is still 134.2 MB. Free memory was 102.7 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:33,786 INFO L168 Benchmark]: Boogie Preprocessor took 57.44 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 99.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:46:33,787 INFO L168 Benchmark]: RCFGBuilder took 801.30 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 79.6 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:33,788 INFO L168 Benchmark]: BuchiAutomizer took 3449.21 ms. Allocated memory is still 134.2 MB. Free memory was 79.6 MB in the beginning and 88.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:33,788 INFO L168 Benchmark]: Witness Printer took 75.39 ms. Allocated memory is still 134.2 MB. Free memory was 88.4 MB in the beginning and 86.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:46:33,793 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 92.3 MB. Free memory is still 71.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 706.71 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 54.2 MB in the beginning and 102.7 MB in the end (delta: -48.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 97.08 ms. Allocated memory is still 134.2 MB. Free memory was 102.7 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.44 ms. Allocated memory is still 134.2 MB. Free memory was 100.6 MB in the beginning and 99.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 801.30 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 79.6 MB in the end (delta: 19.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3449.21 ms. Allocated memory is still 134.2 MB. Free memory was 79.6 MB in the beginning and 88.4 MB in the end (delta: -8.8 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. * Witness Printer took 75.39 ms. Allocated memory is still 134.2 MB. Free memory was 88.4 MB in the beginning and 86.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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 3.3s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 2.6s. Construction of modules took 0.2s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 0. Minimization of det autom 3. Minimization of nondet autom 0. Automata minimization 34.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 3. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 68 SDtfs, 29 SDslu, 60 SDs, 0 SdLazy, 100 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 281.8ms Time 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 - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 536]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {NULL=5609} State at position 1 is {s=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6a4a4e9d=0, NULL=5610, NULL=5609, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6112c6d5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3d7c852f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@279902c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5ebc10c7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@307ebab6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5be9433=0, root=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@699170b1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3da66156=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3d7c852f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e791cfc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@615f3a8f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@156bb141=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6b3913e1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3da66156=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@561f38f7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@233b0a59=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@561f38f7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5ebc10c7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@699170b1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@5be9433=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6112c6d5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@707608b2=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2e0c6c88=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7de89f0a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@233b0a59=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@684dd491=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6209f63d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@31520e1a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@279902c8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3abd9af7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7678666d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@707608b2=0, n=-1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7678666d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@131555fd=22, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@31e90054=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@6a4a4e9d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@615f3a8f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@307ebab6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@7de89f0a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@31520e1a=0, root=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTBinaryExpression@66c138c3=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@3abd9af7=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@330eabab=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6209f63d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@31e90054=0, s=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@684dd491=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@330eabab=0, s=0, NULL=5611, n=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFieldReference@2e0c6c88=0} - 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) 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! [2021-10-13 00:46:33,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efbc526f-9fae-4937-b0a4-46bb27602115/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...