./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 643182475b6f3736876ef9d58257e821498e53d566e4d81dd06a8f042f299e0b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:11:30,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:11:30,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:11:30,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:11:30,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:11:30,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:11:30,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:11:30,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:11:30,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:11:30,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:11:30,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:11:30,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:11:30,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:11:30,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:11:30,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:11:30,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:11:30,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:11:30,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:11:30,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:11:30,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:11:30,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:11:30,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:11:30,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:11:30,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:11:30,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:11:30,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:11:30,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:11:30,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:11:30,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:11:30,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:11:30,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:11:30,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:11:30,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:11:30,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:11:30,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:11:30,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:11:30,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:11:30,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:11:30,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:11:30,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:11:30,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:11:30,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:11:30,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:11:30,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:11:30,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:11:30,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:11:30,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:11:30,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:11:30,952 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:11:30,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:11:30,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:11:30,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:11:30,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:11:30,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:11:30,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:11:30,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:11:30,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:11:30,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:11:30,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:11:30,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:11:30,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:11:30,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:11:30,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:11:30,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:11:30,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:11:30,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:11:30,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:11:30,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:11:30,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:11:30,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:11:30,958 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:11:30,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:11:30,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:11:30,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:11:30,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 643182475b6f3736876ef9d58257e821498e53d566e4d81dd06a8f042f299e0b [2021-10-28 23:11:31,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:11:31,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:11:31,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:11:31,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:11:31,335 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:11:31,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-properties/list_flag-1.i [2021-10-28 23:11:31,447 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/data/733ef3ff0/e010297ef1754920be1cdfb320c8aca6/FLAGcadae6473 [2021-10-28 23:11:32,304 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:11:32,305 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/sv-benchmarks/c/list-properties/list_flag-1.i [2021-10-28 23:11:32,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/data/733ef3ff0/e010297ef1754920be1cdfb320c8aca6/FLAGcadae6473 [2021-10-28 23:11:32,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/data/733ef3ff0/e010297ef1754920be1cdfb320c8aca6 [2021-10-28 23:11:32,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:11:32,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:11:32,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:11:32,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:11:32,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:11:32,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:11:32" (1/1) ... [2021-10-28 23:11:32,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3b5e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:32, skipping insertion in model container [2021-10-28 23:11:32,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:11:32" (1/1) ... [2021-10-28 23:11:32,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:11:32,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:11:32,962 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2021-10-28 23:11:32,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:11:32,985 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:11:33,065 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2021-10-28 23:11:33,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:11:33,110 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:11:33,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33 WrapperNode [2021-10-28 23:11:33,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:11:33,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:11:33,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:11:33,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:11:33,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:11:33,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:11:33,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:11:33,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:11:33,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:11:33,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:11:33,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:11:33,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:11:33,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (1/1) ... [2021-10-28 23:11:33,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:11:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:11:33,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:11:33,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:11:33,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:11:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:11:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:11:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 23:11:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:11:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 23:11:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:11:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:11:33,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:11:33,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:11:33,795 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 23:11:33,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:11:33 BoogieIcfgContainer [2021-10-28 23:11:33,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:11:33,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:11:33,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:11:33,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:11:33,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:11:32" (1/3) ... [2021-10-28 23:11:33,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362e1d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:11:33, skipping insertion in model container [2021-10-28 23:11:33,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:11:33" (2/3) ... [2021-10-28 23:11:33,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362e1d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:11:33, skipping insertion in model container [2021-10-28 23:11:33,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:11:33" (3/3) ... [2021-10-28 23:11:33,813 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2021-10-28 23:11:33,820 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:11:33,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:11:33,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:11:33,906 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:11:33,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:11:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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) [2021-10-28 23:11:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 23:11:33,935 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:33,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:33,936 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1941242346, now seen corresponding path program 1 times [2021-10-28 23:11:33,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:33,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226363315] [2021-10-28 23:11:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:33,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:11:34,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:11:34,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226363315] [2021-10-28 23:11:34,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226363315] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:11:34,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:11:34,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:11:34,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309677312] [2021-10-28 23:11:34,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:11:34,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:11:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:11:34,261 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-10-28 23:11:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:34,281 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-10-28 23:11:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:11:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 11 [2021-10-28 23:11:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:34,295 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:11:34,296 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:11:34,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:11:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:11:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-28 23:11:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-10-28 23:11:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-28 23:11:34,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-10-28 23:11:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:34,344 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-28 23:11:34,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-10-28 23:11:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-28 23:11:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:11:34,346 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:34,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:34,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:11:34,347 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:34,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1795403316, now seen corresponding path program 1 times [2021-10-28 23:11:34,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:34,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965754607] [2021-10-28 23:11:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:34,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:11:34,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:11:34,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965754607] [2021-10-28 23:11:34,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965754607] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:11:34,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:11:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:11:34,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416276007] [2021-10-28 23:11:34,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:11:34,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:11:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:11:34,510 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-10-28 23:11:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:34,647 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-10-28 23:11:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:11:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) Word has length 13 [2021-10-28 23:11:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:34,652 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:11:34,652 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 23:11:34,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:11:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 23:11:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-10-28 23:11:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2021-10-28 23:11:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-28 23:11:34,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2021-10-28 23:11:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:34,668 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-28 23:11:34,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-10-28 23:11:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-28 23:11:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:11:34,670 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:34,670 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:11:34,671 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1242942375, now seen corresponding path program 1 times [2021-10-28 23:11:34,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:34,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558173232] [2021-10-28 23:11:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:34,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:11:34,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:11:34,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558173232] [2021-10-28 23:11:34,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558173232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:11:34,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:11:34,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:11:34,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55994746] [2021-10-28 23:11:34,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:11:34,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:11:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:11:34,794 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-28 23:11:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:34,976 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-10-28 23:11:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:11:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) Word has length 15 [2021-10-28 23:11:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:34,980 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:11:34,980 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 23:11:34,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:11:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 23:11:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-10-28 23:11:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2021-10-28 23:11:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-28 23:11:34,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2021-10-28 23:11:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:34,987 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-28 23:11:34,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-28 23:11:34,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-28 23:11:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:11:34,989 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:34,989 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:34,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:11:34,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash -799146, now seen corresponding path program 1 times [2021-10-28 23:11:34,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:34,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035624293] [2021-10-28 23:11:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:34,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:11:35,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:11:35,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035624293] [2021-10-28 23:11:35,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035624293] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:11:35,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:11:35,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:11:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29416353] [2021-10-28 23:11:35,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:11:35,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:11:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:11:35,127 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-28 23:11:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:35,208 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-10-28 23:11:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:11:35,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) Word has length 15 [2021-10-28 23:11:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:35,210 INFO L225 Difference]: With dead ends: 44 [2021-10-28 23:11:35,210 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:11:35,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:11:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:11:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2021-10-28 23:11:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2021-10-28 23:11:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-28 23:11:35,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-10-28 23:11:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:35,217 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-28 23:11:35,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-28 23:11:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-28 23:11:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:11:35,219 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:35,219 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:35,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:11:35,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash -172690303, now seen corresponding path program 1 times [2021-10-28 23:11:35,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:35,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923954716] [2021-10-28 23:11:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:35,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:11:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:11:35,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:11:35,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923954716] [2021-10-28 23:11:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923954716] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:11:35,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:11:35,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:11:35,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459812987] [2021-10-28 23:11:35,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:11:35,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:11:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:11:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:11:35,280 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-28 23:11:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:11:35,300 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-10-28 23:11:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:11:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 19 [2021-10-28 23:11:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:11:35,304 INFO L225 Difference]: With dead ends: 50 [2021-10-28 23:11:35,306 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:11:35,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:11:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:11:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-28 23:11:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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) [2021-10-28 23:11:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-28 23:11:35,318 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2021-10-28 23:11:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:11:35,319 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-28 23:11:35,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-10-28 23:11:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-28 23:11:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:11:35,321 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:11:35,322 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:11:35,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:11:35,322 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:11:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:11:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash -616427248, now seen corresponding path program 1 times [2021-10-28 23:11:35,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:11:35,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704823036] [2021-10-28 23:11:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:11:35,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:11:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:11:35,399 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:11:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:11:35,445 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:11:35,446 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:11:35,447 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:11:35,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:11:35,454 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-10-28 23:11:35,458 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:11:35,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:11:35 BoogieIcfgContainer [2021-10-28 23:11:35,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:11:35,492 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:11:35,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:11:35,493 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:11:35,493 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:11:33" (3/4) ... [2021-10-28 23:11:35,496 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:11:35,553 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:11:35,554 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:11:35,556 INFO L168 Benchmark]: Toolchain (without parser) took 3045.75 ms. Allocated memory was 117.4 MB in the beginning and 146.8 MB in the end (delta: 29.4 MB). Free memory was 81.6 MB in the beginning and 96.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:35,557 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 75.5 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:11:35,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 596.83 ms. Allocated memory is still 117.4 MB. Free memory was 81.4 MB in the beginning and 84.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:35,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.40 ms. Allocated memory is still 117.4 MB. Free memory was 84.2 MB in the beginning and 82.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:35,560 INFO L168 Benchmark]: Boogie Preprocessor took 38.36 ms. Allocated memory is still 117.4 MB. Free memory was 82.1 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:11:35,561 INFO L168 Benchmark]: RCFGBuilder took 583.63 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 69.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:35,562 INFO L168 Benchmark]: TraceAbstraction took 1691.79 ms. Allocated memory was 117.4 MB in the beginning and 146.8 MB in the end (delta: 29.4 MB). Free memory was 68.9 MB in the beginning and 98.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:35,563 INFO L168 Benchmark]: Witness Printer took 61.83 ms. Allocated memory is still 146.8 MB. Free memory was 98.4 MB in the beginning and 96.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:11:35,569 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 75.5 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 596.83 ms. Allocated memory is still 117.4 MB. Free memory was 81.4 MB in the beginning and 84.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.40 ms. Allocated memory is still 117.4 MB. Free memory was 84.2 MB in the beginning and 82.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.36 ms. Allocated memory is still 117.4 MB. Free memory was 82.1 MB in the beginning and 80.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 583.63 ms. Allocated memory is still 117.4 MB. Free memory was 80.8 MB in the beginning and 69.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1691.79 ms. Allocated memory was 117.4 MB in the beginning and 146.8 MB in the end (delta: 29.4 MB). Free memory was 68.9 MB in the beginning and 98.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Witness Printer took 61.83 ms. Allocated memory is still 146.8 MB. Free memory was 98.4 MB in the beginning and 96.3 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: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 1 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 71 SDslu, 133 SDs, 0 SdLazy, 138 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 197 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:11:35,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f59e74d-3743-4f7e-af23-1e6d7c551fa2/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...