./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt --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 20d5e20d9a05badce6014033a9e9f921320cf457 ..................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 00:36:41,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:36:41,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:36:41,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:36:41,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:36:41,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:36:41,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:36:41,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:36:41,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:36:41,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:36:41,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:36:41,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:36:41,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:36:41,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:36:41,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:36:41,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:36:41,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:36:41,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:36:41,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:36:41,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:36:41,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:36:41,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:36:41,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:36:41,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:36:41,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:36:41,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:36:41,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:36:41,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:36:41,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:36:41,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:36:41,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:36:41,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:36:41,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:36:41,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:36:41,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:36:41,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:36:41,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:36:41,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:36:41,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:36:41,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:36:41,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:36:41,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:36:41,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:36:41,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:36:41,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:36:41,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:36:41,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:36:41,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:36:41,686 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:36:41,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:36:41,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:36:41,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:36:41,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:36:41,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:36:41,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:36:41,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:36:41,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:36:41,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:36:41,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:36:41,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:36:41,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:36:41,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:36:41,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:36:41,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:36:41,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:36:41,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:36:41,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:36:41,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:36:41,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:36:41,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:36:41,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:36:41,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:36:41,694 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_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d5e20d9a05badce6014033a9e9f921320cf457 [2021-10-13 00:36:42,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:36:42,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:36:42,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:36:42,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:36:42,057 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:36:42,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/recursive-simple/afterrec-1.c [2021-10-13 00:36:42,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/data/3e17a72eb/be2b731d1c32406db10b4adadc53cf40/FLAG3af4b218e [2021-10-13 00:36:42,590 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:36:42,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/sv-benchmarks/c/recursive-simple/afterrec-1.c [2021-10-13 00:36:42,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/data/3e17a72eb/be2b731d1c32406db10b4adadc53cf40/FLAG3af4b218e [2021-10-13 00:36:42,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/data/3e17a72eb/be2b731d1c32406db10b4adadc53cf40 [2021-10-13 00:36:42,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:36:42,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:36:42,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:36:42,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:36:42,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:36:43,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:36:42" (1/1) ... [2021-10-13 00:36:43,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa4cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43, skipping insertion in model container [2021-10-13 00:36:43,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:36:42" (1/1) ... [2021-10-13 00:36:43,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:36:43,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:36:43,190 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_02d7f06f-840d-460f-8779-0401a6665c23/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2021-10-13 00:36:43,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:36:43,217 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:36:43,227 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_02d7f06f-840d-460f-8779-0401a6665c23/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2021-10-13 00:36:43,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:36:43,241 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:36:43,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43 WrapperNode [2021-10-13 00:36:43,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:36:43,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:36:43,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:36:43,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:36:43,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:36:43,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:36:43,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:36:43,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:36:43,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:36:43,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:36:43,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:36:43,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:36:43,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (1/1) ... [2021-10-13 00:36:43,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:36:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:36:43,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:36:43,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:36:43,381 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-13 00:36:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-13 00:36:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:36:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:36:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:36:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:36:43,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:36:43,533 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-13 00:36:43,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:36:43 BoogieIcfgContainer [2021-10-13 00:36:43,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:36:43,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:36:43,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:36:43,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:36:43,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:36:42" (1/3) ... [2021-10-13 00:36:43,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faa2d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:36:43, skipping insertion in model container [2021-10-13 00:36:43,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:36:43" (2/3) ... [2021-10-13 00:36:43,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2faa2d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:36:43, skipping insertion in model container [2021-10-13 00:36:43,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:36:43" (3/3) ... [2021-10-13 00:36:43,543 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2021-10-13 00:36:43,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:36:43,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:36:43,605 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:36:43,616 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:36:43,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:36:43,634 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) [2021-10-13 00:36:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:36:43,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:36:43,641 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:36:43,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:36:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:36:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2027498805, now seen corresponding path program 1 times [2021-10-13 00:36:43,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:36:43,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976184905] [2021-10-13 00:36:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:36:43,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:36:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:36:43,754 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:36:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:36:43,807 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:36:43,810 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 00:36:43,811 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location fErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:36:43,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:36:43,821 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:36:43,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:36:43 BoogieIcfgContainer [2021-10-13 00:36:43,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:36:43,843 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:36:43,843 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:36:43,844 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:36:43,844 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:36:43" (3/4) ... [2021-10-13 00:36:43,846 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 00:36:43,890 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:36:43,891 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:36:43,893 INFO L168 Benchmark]: Toolchain (without parser) took 899.45 ms. Allocated memory is still 107.0 MB. Free memory was 73.3 MB in the beginning and 57.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:36:43,893 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory was 51.8 MB in the beginning and 51.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:36:43,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.40 ms. Allocated memory is still 107.0 MB. Free memory was 73.3 MB in the beginning and 84.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:36:43,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.46 ms. Allocated memory is still 107.0 MB. Free memory was 84.5 MB in the beginning and 83.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:36:43,895 INFO L168 Benchmark]: Boogie Preprocessor took 17.90 ms. Allocated memory is still 107.0 MB. Free memory was 83.1 MB in the beginning and 81.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:36:43,896 INFO L168 Benchmark]: RCFGBuilder took 241.37 ms. Allocated memory is still 107.0 MB. Free memory was 81.9 MB in the beginning and 73.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:36:43,897 INFO L168 Benchmark]: TraceAbstraction took 306.54 ms. Allocated memory is still 107.0 MB. Free memory was 72.6 MB in the beginning and 59.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:36:43,897 INFO L168 Benchmark]: Witness Printer took 47.35 ms. Allocated memory is still 107.0 MB. Free memory was 59.4 MB in the beginning and 57.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:36:43,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory was 51.8 MB in the beginning and 51.8 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.40 ms. Allocated memory is still 107.0 MB. Free memory was 73.3 MB in the beginning and 84.5 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.46 ms. Allocated memory is still 107.0 MB. Free memory was 84.5 MB in the beginning and 83.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.90 ms. Allocated memory is still 107.0 MB. Free memory was 83.1 MB in the beginning and 81.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 241.37 ms. Allocated memory is still 107.0 MB. Free memory was 81.9 MB in the beginning and 73.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 306.54 ms. Allocated memory is still 107.0 MB. Free memory was 72.6 MB in the beginning and 59.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 47.35 ms. Allocated memory is still 107.0 MB. Free memory was 59.4 MB in the beginning and 57.3 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 9]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] CALL f(4) VAL [\old(n)=4] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=4, n=3] [L8] CALL f(n) VAL [\old(n)=3] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=3, n=2] [L8] CALL f(n) VAL [\old(n)=2] [L6] COND TRUE n<3 VAL [\old(n)=2, n=2] [L8] RET f(n) VAL [\old(n)=3, n=2] [L9] reach_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 216.3ms, OverallIterations: 1, TraceHistogramMax: 3, EmptinessCheckTime: 9.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.4ms SsaConstructionTime, 43.1ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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! [2021-10-13 00:36:43,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d7f06f-840d-460f-8779-0401a6665c23/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...