./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec-2.c --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_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg --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 1c92d0a3779cdad7e145b29b6ae35aeb1a90bc327e2327b92a2158da4de5b6ea ...................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:37:04,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:37:04,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:37:04,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:37:04,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:37:04,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:37:04,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:37:04,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:37:04,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:37:04,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:37:04,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:37:04,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:37:04,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:37:04,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:37:04,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:37:04,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:37:04,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:37:04,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:37:04,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:37:04,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:37:04,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:37:04,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:37:04,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:37:04,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:37:04,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:37:04,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:37:04,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:37:04,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:37:04,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:37:04,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:37:04,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:37:04,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:37:04,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:37:04,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:37:04,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:37:04,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:37:04,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:37:04,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:37:04,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:37:04,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:37:04,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:37:04,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:37:04,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:37:04,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:37:04,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:37:04,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:37:04,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:37:04,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:37:04,950 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:37:04,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:37:04,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:37:04,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:37:04,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:37:04,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:37:04,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:37:04,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:37:04,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:37:04,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:37:04,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:37:04,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:37:04,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:37:04,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:37:04,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:37:04,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:37:04,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:37:04,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:37:04,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:37:04,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:37:04,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:37:04,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:37:04,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:37:04,958 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:37:04,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:37:04,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:37:04,958 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_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c92d0a3779cdad7e145b29b6ae35aeb1a90bc327e2327b92a2158da4de5b6ea [2021-10-28 08:37:05,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:37:05,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:37:05,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:37:05,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:37:05,465 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:37:05,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/afterrec-2.c [2021-10-28 08:37:05,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/data/47c738372/f06650e2b46346bb99bc0ee14c3e9f1f/FLAG2b038fa01 [2021-10-28 08:37:06,193 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:37:06,194 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/sv-benchmarks/c/recursive-simple/afterrec-2.c [2021-10-28 08:37:06,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/data/47c738372/f06650e2b46346bb99bc0ee14c3e9f1f/FLAG2b038fa01 [2021-10-28 08:37:06,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/data/47c738372/f06650e2b46346bb99bc0ee14c3e9f1f [2021-10-28 08:37:06,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:37:06,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:37:06,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:37:06,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:37:06,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:37:06,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fcbf7d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06, skipping insertion in model container [2021-10-28 08:37:06,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:37:06,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:37:06,788 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_b6f65648-9813-4678-9188-90e7c91f518e/sv-benchmarks/c/recursive-simple/afterrec-2.c[318,331] [2021-10-28 08:37:06,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:37:06,806 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:37:06,820 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_b6f65648-9813-4678-9188-90e7c91f518e/sv-benchmarks/c/recursive-simple/afterrec-2.c[318,331] [2021-10-28 08:37:06,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:37:06,840 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:37:06,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06 WrapperNode [2021-10-28 08:37:06,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:37:06,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:37:06,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:37:06,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:37:06,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:37:06,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:37:06,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:37:06,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:37:06,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:37:06,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:37:06,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:37:06,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:37:06,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (1/1) ... [2021-10-28 08:37:06,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:37:06,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:06,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:37:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:37:07,019 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-28 08:37:07,020 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-28 08:37:07,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:37:07,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:37:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:37:07,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:37:07,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:37:07,321 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 08:37:07,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:37:07 BoogieIcfgContainer [2021-10-28 08:37:07,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:37:07,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:37:07,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:37:07,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:37:07,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:37:06" (1/3) ... [2021-10-28 08:37:07,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394d4473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:37:07, skipping insertion in model container [2021-10-28 08:37:07,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:37:06" (2/3) ... [2021-10-28 08:37:07,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394d4473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:37:07, skipping insertion in model container [2021-10-28 08:37:07,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:37:07" (3/3) ... [2021-10-28 08:37:07,335 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2021-10-28 08:37:07,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:37:07,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:37:07,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:37:07,445 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 08:37:07,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:37:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:37:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:37:07,486 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:37:07,487 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:37:07,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:37:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:37:07,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2027498805, now seen corresponding path program 1 times [2021-10-28 08:37:07,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:37:07,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242788049] [2021-10-28 08:37:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:07,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:37:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:07,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 08:37:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:37:07,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:37:07,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242788049] [2021-10-28 08:37:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242788049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:37:07,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395945561] [2021-10-28 08:37:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:37:07,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:37:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:37:07,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:37:07,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:37:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:37:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:37:08,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:37:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:37:08,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395945561] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:37:08,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:37:08,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-10-28 08:37:08,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328788277] [2021-10-28 08:37:08,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:37:08,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:37:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:37:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:37:08,192 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:37:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:37:08,264 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-10-28 08:37:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:37:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-28 08:37:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:37:08,283 INFO L225 Difference]: With dead ends: 20 [2021-10-28 08:37:08,284 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 08:37:08,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:37:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 08:37:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 08:37:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 08:37:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 08:37:08,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-28 08:37:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:37:08,316 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 08:37:08,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:37:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 08:37:08,317 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 08:37:08,320 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:37:08,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:37:08,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-28 08:37:08,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 08:37:08,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:37:08,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:37:08,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:37:08,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:37:08,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 08:37:08,578 INFO L857 garLoopResultBuilder]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2021-10-28 08:37:08,579 INFO L853 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2021-10-28 08:37:08,580 INFO L857 garLoopResultBuilder]: For program point fEXIT(lines 5 10) no Hoare annotation was computed. [2021-10-28 08:37:08,580 INFO L857 garLoopResultBuilder]: For program point L8-1(lines 5 10) no Hoare annotation was computed. [2021-10-28 08:37:08,580 INFO L857 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-10-28 08:37:08,580 INFO L860 garLoopResultBuilder]: At program point fENTRY(lines 5 10) the Hoare annotation is: true [2021-10-28 08:37:08,580 INFO L857 garLoopResultBuilder]: For program point fFINAL(lines 5 10) no Hoare annotation was computed. [2021-10-28 08:37:08,581 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 08:37:08,581 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 08:37:08,581 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 08:37:08,581 INFO L860 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: true [2021-10-28 08:37:08,581 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 08:37:08,581 INFO L857 garLoopResultBuilder]: For program point L13-1(lines 12 14) no Hoare annotation was computed. [2021-10-28 08:37:08,585 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-10-28 08:37:08,587 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:37:08,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:37:08 BoogieIcfgContainer [2021-10-28 08:37:08,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:37:08,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:37:08,593 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:37:08,593 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:37:08,594 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:37:07" (3/4) ... [2021-10-28 08:37:08,598 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:37:08,607 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2021-10-28 08:37:08,612 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 08:37:08,612 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-28 08:37:08,613 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:37:08,613 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:37:08,649 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:37:08,649 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:37:08,651 INFO L168 Benchmark]: Toolchain (without parser) took 2127.29 ms. Allocated memory is still 117.4 MB. Free memory was 80.0 MB in the beginning and 50.2 MB in the end (delta: 29.8 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:37:08,652 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 117.4 MB. Free memory is still 96.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:37:08,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.12 ms. Allocated memory is still 117.4 MB. Free memory was 79.8 MB in the beginning and 92.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:37:08,654 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.02 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:37:08,655 INFO L168 Benchmark]: Boogie Preprocessor took 23.27 ms. Allocated memory is still 117.4 MB. Free memory was 91.1 MB in the beginning and 90.6 MB in the end (delta: 498.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:37:08,656 INFO L168 Benchmark]: RCFGBuilder took 419.02 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 80.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:37:08,657 INFO L168 Benchmark]: TraceAbstraction took 1266.18 ms. Allocated memory is still 117.4 MB. Free memory was 80.1 MB in the beginning and 52.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:37:08,658 INFO L168 Benchmark]: Witness Printer took 57.05 ms. Allocated memory is still 117.4 MB. Free memory was 52.3 MB in the beginning and 50.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:37:08,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 117.4 MB. Free memory is still 96.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.12 ms. Allocated memory is still 117.4 MB. Free memory was 79.8 MB in the beginning and 92.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.02 ms. Allocated memory is still 117.4 MB. Free memory was 92.6 MB in the beginning and 91.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.27 ms. Allocated memory is still 117.4 MB. Free memory was 91.1 MB in the beginning and 90.6 MB in the end (delta: 498.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 419.02 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 80.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1266.18 ms. Allocated memory is still 117.4 MB. Free memory was 80.1 MB in the beginning and 52.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 57.05 ms. Allocated memory is still 117.4 MB. Free memory was 52.3 MB in the beginning and 50.2 MB in the end (delta: 2.0 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 - PositiveResult [Line: 9]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 SDtfs, 5 SDslu, 9 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 4, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 6 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 SizeOfPredicates, 1 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 10/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 08:37:08,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f65648-9813-4678-9188-90e7c91f518e/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...