./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b5237d83 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_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a --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 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 --- 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-b5237d8 [2022-11-21 16:39:51,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:39:51,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:39:51,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:39:51,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:39:51,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:39:51,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:39:51,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:39:51,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:39:51,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:39:51,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:39:51,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:39:51,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:39:51,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:39:51,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:39:51,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:39:51,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:39:51,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:39:51,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:39:51,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:39:51,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:39:51,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:39:51,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:39:51,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:39:51,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:39:51,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:39:51,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:39:51,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:39:51,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:39:51,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:39:51,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:39:51,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:39:51,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:39:51,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:39:51,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:39:51,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:39:51,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:39:51,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:39:51,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:39:51,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:39:51,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:39:51,555 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-11-21 16:39:51,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:39:51,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:39:51,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:39:51,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:39:51,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:39:51,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:39:51,599 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:39:51,599 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-21 16:39:51,599 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-21 16:39:51,599 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-21 16:39:51,601 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-21 16:39:51,601 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-21 16:39:51,601 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-21 16:39:51,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:39:51,602 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:39:51,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:39:51,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:39:51,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:39:51,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:39:51,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-21 16:39:51,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-21 16:39:51,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-21 16:39:51,603 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:39:51,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:39:51,604 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-21 16:39:51,604 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:39:51,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-21 16:39:51,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:39:51,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:39:51,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:39:51,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:39:51,607 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-21 16:39:51,608 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_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 [2022-11-21 16:39:51,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:39:51,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:39:51,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:39:51,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:39:51,965 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:39:51,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/memsafety-ext/tree_dsw.i [2022-11-21 16:39:55,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:39:55,392 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:39:55,393 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/sv-benchmarks/c/memsafety-ext/tree_dsw.i [2022-11-21 16:39:55,405 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/data/cb240aa7a/b2c9d8569f304855acad8bb814f52794/FLAGf5aef93ec [2022-11-21 16:39:55,419 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/data/cb240aa7a/b2c9d8569f304855acad8bb814f52794 [2022-11-21 16:39:55,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:39:55,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:39:55,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:39:55,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:39:55,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:39:55,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:55,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55, skipping insertion in model container [2022-11-21 16:39:55,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:55,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:39:55,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:39:55,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:39:55,781 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:39:55,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:39:55,901 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:39:55,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55 WrapperNode [2022-11-21 16:39:55,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:39:55,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:39:55,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:39:55,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:39:55,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:55,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:55,976 INFO L138 Inliner]: procedures = 124, calls = 52, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 148 [2022-11-21 16:39:55,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:39:55,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:39:55,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:39:55,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:39:55,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:55,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:39:56,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:39:56,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:39:56,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:39:56,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (1/1) ... [2022-11-21 16:39:56,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-21 16:39:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:39:56,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-21 16:39:56,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-21 16:39:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:39:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:39:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:39:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:39:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:39:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:39:56,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:39:56,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:39:56,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:39:56,255 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:39:56,261 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:39:56,787 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:39:56,794 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:39:56,794 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:39:56,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:39:56 BoogieIcfgContainer [2022-11-21 16:39:56,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:39:56,803 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-21 16:39:56,804 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-21 16:39:56,808 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-21 16:39:56,815 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-21 16:39:56,815 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.11 04:39:55" (1/3) ... [2022-11-21 16:39:56,816 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2dd3f773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.11 04:39:56, skipping insertion in model container [2022-11-21 16:39:56,816 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-21 16:39:56,816 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:39:55" (2/3) ... [2022-11-21 16:39:56,817 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2dd3f773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.11 04:39:56, skipping insertion in model container [2022-11-21 16:39:56,817 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-21 16:39:56,817 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:39:56" (3/3) ... [2022-11-21 16:39:56,819 INFO L332 chiAutomizerObserver]: Analyzing ICFG tree_dsw.i [2022-11-21 16:39:56,883 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-21 16:39:56,883 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-21 16:39:56,883 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-21 16:39:56,883 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-21 16:39:56,884 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-21 16:39:56,884 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-21 16:39:56,884 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-21 16:39:56,884 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-21 16:39:56,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-21 16:39:56,909 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2022-11-21 16:39:56,910 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 16:39:56,910 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 16:39:56,917 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 16:39:56,918 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:39:56,918 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-21 16:39:56,918 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-21 16:39:56,924 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2022-11-21 16:39:56,924 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 16:39:56,925 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 16:39:56,925 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 16:39:56,925 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:39:56,934 INFO L748 eck$LassoCheckResult]: Stem: 14#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(11, 2); 7#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~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~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$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 20#L549-2true [2022-11-21 16:39:56,935 INFO L750 eck$LassoCheckResult]: Loop: 20#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; 11#L539-2true assume !true; 17#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); 6#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; 4#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); 10#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; 20#L549-2true [2022-11-21 16:39:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2022-11-21 16:39:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:56,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869948048] [2022-11-21 16:39:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:56,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:57,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:57,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:39:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1235889697, now seen corresponding path program 1 times [2022-11-21 16:39:57,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:57,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178334801] [2022-11-21 16:39:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:57,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:57,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178334801] [2022-11-21 16:39:57,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178334801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:57,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:57,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:39:57,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030806221] [2022-11-21 16:39:57,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:57,431 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-21 16:39:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:39:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:39:57,492 INFO L87 Difference]: Start difference. First operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-21 16:39:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:57,503 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2022-11-21 16:39:57,504 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 36 transitions. [2022-11-21 16:39:57,507 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2022-11-21 16:39:57,511 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 21 states and 32 transitions. [2022-11-21 16:39:57,512 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2022-11-21 16:39:57,513 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2022-11-21 16:39:57,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 32 transitions. [2022-11-21 16:39:57,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:39:57,516 INFO L218 hiAutomatonCegarLoop]: Abstraction has 21 states and 32 transitions. [2022-11-21 16:39:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 32 transitions. [2022-11-21 16:39:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-21 16:39:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.5238095238095237) 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) [2022-11-21 16:39:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2022-11-21 16:39:57,546 INFO L240 hiAutomatonCegarLoop]: Abstraction has 21 states and 32 transitions. [2022-11-21 16:39:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:39:57,557 INFO L428 stractBuchiCegarLoop]: Abstraction has 21 states and 32 transitions. [2022-11-21 16:39:57,557 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-21 16:39:57,557 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 32 transitions. [2022-11-21 16:39:57,560 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 16 [2022-11-21 16:39:57,561 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 16:39:57,561 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 16:39:57,562 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 16:39:57,562 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:57,562 INFO L748 eck$LassoCheckResult]: Stem: 64#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(11, 2); 65#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~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~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); 70#L549-2 [2022-11-21 16:39:57,563 INFO L750 eck$LassoCheckResult]: Loop: 70#L549-2 assume !!(0 != main_#t~nondet4#1);havoc main_#t~nondet4#1;main_~n~0#1.base, main_~n~0#1.offset := main_~root~0#1.base, main_~root~0#1.offset; 63#L539-2 call main_#t~mem5#1.base, main_#t~mem5#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem5#1.base != 0 || main_#t~mem5#1.offset != 0; 71#L538-1 assume main_#t~short7#1;call main_#t~mem6#1.base, main_#t~mem6#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4);main_#t~short7#1 := main_#t~mem6#1.base != 0 || main_#t~mem6#1.offset != 0; 58#L538-3 assume !main_#t~short7#1;havoc main_#t~mem5#1.base, main_#t~mem5#1.offset;havoc main_#t~mem6#1.base, main_#t~mem6#1.offset;havoc main_#t~short7#1; 59#L538-5 call main_#t~mem11#1.base, main_#t~mem11#1.offset := read~$Pointer$(main_~n~0#1.base, main_~n~0#1.offset, 4); 69#L544 assume (main_#t~mem11#1.base == 0 && main_#t~mem11#1.offset == 0) && 0 != main_#t~nondet12#1;havoc main_#t~mem11#1.base, main_#t~mem11#1.offset;havoc main_#t~nondet12#1;call main_#t~malloc13#1.base, main_#t~malloc13#1.offset := #Ultimate.allocOnHeap(8);call write~$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$(0, 0, main_#t~mem15#1.base, 4 + main_#t~mem15#1.offset, 4);havoc main_#t~mem15#1.base, main_#t~mem15#1.offset; 66#L544-2 call main_#t~mem16#1.base, main_#t~mem16#1.offset := read~$Pointer$(main_~n~0#1.base, 4 + main_~n~0#1.offset, 4); 67#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; 70#L549-2 [2022-11-21 16:39:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2022-11-21 16:39:57,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:57,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805230049] [2022-11-21 16:39:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:57,615 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:57,638 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:39:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2066931060, now seen corresponding path program 1 times [2022-11-21 16:39:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:57,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974912732] [2022-11-21 16:39:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:57,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:58,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974912732] [2022-11-21 16:39:58,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974912732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:58,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:58,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:39:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105921202] [2022-11-21 16:39:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:58,190 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-21 16:39:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:39:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:39:58,192 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. cyclomatic complexity: 14 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) [2022-11-21 16:39:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:58,391 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2022-11-21 16:39:58,391 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 42 transitions. [2022-11-21 16:39:58,392 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2022-11-21 16:39:58,394 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 42 transitions. [2022-11-21 16:39:58,394 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2022-11-21 16:39:58,394 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2022-11-21 16:39:58,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 42 transitions. [2022-11-21 16:39:58,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:39:58,394 INFO L218 hiAutomatonCegarLoop]: Abstraction has 28 states and 42 transitions. [2022-11-21 16:39:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 42 transitions. [2022-11-21 16:39:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-11-21 16:39:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 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) [2022-11-21 16:39:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 36 transitions. [2022-11-21 16:39:58,398 INFO L240 hiAutomatonCegarLoop]: Abstraction has 24 states and 36 transitions. [2022-11-21 16:39:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:39:58,402 INFO L428 stractBuchiCegarLoop]: Abstraction has 24 states and 36 transitions. [2022-11-21 16:39:58,402 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-21 16:39:58,402 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 36 transitions. [2022-11-21 16:39:58,404 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 19 [2022-11-21 16:39:58,405 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 16:39:58,405 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 16:39:58,405 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 16:39:58,405 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:58,406 INFO L748 eck$LassoCheckResult]: Stem: 123#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(11, 2); 124#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~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~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$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 129#L549-2 [2022-11-21 16:39:58,406 INFO L750 eck$LassoCheckResult]: Loop: 129#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; 122#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; 130#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; 131#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; 140#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); 128#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; 125#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); 126#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; 129#L549-2 [2022-11-21 16:39:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2022-11-21 16:39:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:58,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890612783] [2022-11-21 16:39:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:58,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:58,429 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:58,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:39:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2066932982, now seen corresponding path program 1 times [2022-11-21 16:39:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:58,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099257048] [2022-11-21 16:39:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:58,460 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:58,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:39:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1537472840, now seen corresponding path program 1 times [2022-11-21 16:39:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473416473] [2022-11-21 16:39:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:58,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:39:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:39:58,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:39:58,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473416473] [2022-11-21 16:39:58,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473416473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:39:58,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:39:58,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:39:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096712756] [2022-11-21 16:39:58,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:39:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:39:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:39:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:39:58,998 INFO L87 Difference]: Start difference. First operand 24 states and 36 transitions. cyclomatic complexity: 15 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) [2022-11-21 16:39:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:39:59,222 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2022-11-21 16:39:59,222 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 58 transitions. [2022-11-21 16:39:59,223 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 27 [2022-11-21 16:39:59,223 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 40 states and 58 transitions. [2022-11-21 16:39:59,223 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2022-11-21 16:39:59,224 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2022-11-21 16:39:59,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 58 transitions. [2022-11-21 16:39:59,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:39:59,224 INFO L218 hiAutomatonCegarLoop]: Abstraction has 40 states and 58 transitions. [2022-11-21 16:39:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states and 58 transitions. [2022-11-21 16:39:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-21 16:39:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 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) [2022-11-21 16:39:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-11-21 16:39:59,228 INFO L240 hiAutomatonCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-11-21 16:39:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:39:59,229 INFO L428 stractBuchiCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-11-21 16:39:59,229 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-21 16:39:59,230 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 32 states and 46 transitions. [2022-11-21 16:39:59,230 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 27 [2022-11-21 16:39:59,231 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-21 16:39:59,231 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-21 16:39:59,231 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2022-11-21 16:39:59,231 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:39:59,231 INFO L748 eck$LassoCheckResult]: Stem: 201#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(11, 2); 202#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~mem21#1.base, main_#t~mem21#1.offset, main_#t~mem22#1.base, main_#t~mem22#1.offset, main_#t~malloc23#1.base, main_#t~malloc23#1.offset, main_#t~mem24#1.base, main_#t~mem24#1.offset, main_#t~mem25#1.base, main_#t~mem25#1.offset, main_#t~mem26#1.base, main_#t~mem26#1.offset, main_#t~malloc27#1.base, main_#t~malloc27#1.offset, main_#t~mem28#1.base, main_#t~mem28#1.offset, main_#t~mem29#1.base, main_#t~mem29#1.offset, main_#t~malloc30#1.base, main_#t~malloc30#1.offset, main_#t~mem31#1.base, main_#t~mem31#1.offset, main_~root~0#1.base, main_~root~0#1.offset, main_~n~0#1.base, main_~n~0#1.offset, main_~#sentinel~0#1.base, main_~#sentinel~0#1.offset, main_~pred~0#1.base, main_~pred~0#1.offset, main_~succ~0#1.base, main_~succ~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$(0, 0, main_~root~0#1.base, 4 + main_~root~0#1.offset, 4); 208#L549-2 [2022-11-21 16:39:59,232 INFO L750 eck$LassoCheckResult]: Loop: 208#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; 217#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; 209#L538-1 assume !main_#t~short7#1; 210#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; 226#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); 224#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; 203#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); 204#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; 208#L549-2 [2022-11-21 16:39:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2022-11-21 16:39:59,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241454276] [2022-11-21 16:39:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:59,242 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:59,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:39:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2124191284, now seen corresponding path program 1 times [2022-11-21 16:39:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:59,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096473217] [2022-11-21 16:39:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:59,258 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:59,267 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:39:59,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:39:59,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1480214538, now seen corresponding path program 1 times [2022-11-21 16:39:59,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:39:59,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892603007] [2022-11-21 16:39:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:39:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:39:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:59,290 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:39:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:39:59,311 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:40:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:40:00,050 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:40:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:40:00,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.11 04:40:00 BoogieIcfgContainer [2022-11-21 16:40:00,108 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-21 16:40:00,108 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 16:40:00,108 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 16:40:00,108 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 16:40:00,109 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:39:56" (3/4) ... [2022-11-21 16:40:00,111 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-11-21 16:40:00,149 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 16:40:00,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 16:40:00,155 INFO L158 Benchmark]: Toolchain (without parser) took 4727.33ms. Allocated memory was 155.2MB in the beginning and 213.9MB in the end (delta: 58.7MB). Free memory was 121.0MB in the beginning and 92.7MB in the end (delta: 28.3MB). Peak memory consumption was 89.4MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,156 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 155.2MB. Free memory is still 127.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:40:00,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 479.97ms. Allocated memory is still 155.2MB. Free memory was 120.6MB in the beginning and 103.0MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,157 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.57ms. Allocated memory is still 155.2MB. Free memory was 103.0MB in the beginning and 100.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,158 INFO L158 Benchmark]: Boogie Preprocessor took 67.82ms. Allocated memory is still 155.2MB. Free memory was 100.9MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,162 INFO L158 Benchmark]: RCFGBuilder took 756.80ms. Allocated memory is still 155.2MB. Free memory was 98.9MB in the beginning and 72.6MB in the end (delta: 26.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,163 INFO L158 Benchmark]: BuchiAutomizer took 3304.30ms. Allocated memory was 155.2MB in the beginning and 213.9MB in the end (delta: 58.7MB). Free memory was 72.6MB in the beginning and 94.6MB in the end (delta: -22.0MB). Peak memory consumption was 39.1MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,163 INFO L158 Benchmark]: Witness Printer took 41.71ms. Allocated memory is still 213.9MB. Free memory was 94.6MB in the beginning and 92.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:40:00,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 155.2MB. Free memory is still 127.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 479.97ms. Allocated memory is still 155.2MB. Free memory was 120.6MB in the beginning and 103.0MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.57ms. Allocated memory is still 155.2MB. Free memory was 103.0MB in the beginning and 100.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.82ms. Allocated memory is still 155.2MB. Free memory was 100.9MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 756.80ms. Allocated memory is still 155.2MB. Free memory was 98.9MB in the beginning and 72.6MB in the end (delta: 26.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * BuchiAutomizer took 3304.30ms. Allocated memory was 155.2MB in the beginning and 213.9MB in the end (delta: 58.7MB). Free memory was 72.6MB in the beginning and 94.6MB in the end (delta: -22.0MB). Peak memory consumption was 39.1MB. Max. memory is 16.1GB. * Witness Printer took 41.71ms. Allocated memory is still 213.9MB. Free memory was 94.6MB in the beginning and 92.7MB in the end (delta: 1.9MB). 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 32 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.2s 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, 12 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, 32 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 167 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 82 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 147 IncrementalHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 85 mSDtfsCounter, 147 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={13259:0}] 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={13259:0}] 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! [2022-11-21 16:40:00,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fdfb333-b441-402c-a06f-957ed08e6ba6/bin/uautomizer-vX5HgA9Q3a/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)