./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC --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 0.2.0-7b2dab5 [2021-10-11 00:32:14,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:32:14,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:32:14,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:32:14,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:32:14,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:32:14,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:32:14,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:32:14,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:32:14,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:32:14,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:32:14,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:32:14,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:32:14,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:32:14,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:32:14,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:32:14,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:32:14,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:32:14,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:32:14,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:32:14,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:32:14,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:32:14,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:32:14,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:32:14,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:32:14,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:32:14,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:32:14,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:32:14,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:32:14,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:32:14,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:32:14,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:32:14,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:32:14,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:32:14,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:32:14,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:32:14,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:32:14,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:32:14,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:32:14,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:32:14,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:32:14,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:32:14,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:32:14,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:32:14,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:32:14,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:32:14,727 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:32:14,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:32:14,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:32:14,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:32:14,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:32:14,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:32:14,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:32:14,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:32:14,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:32:14,737 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:32:14,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:32:14,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:32:14,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:32:14,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:32:14,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:32:14,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:32:14,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:32:14,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:32:14,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:32:14,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:32:14,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:32:14,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:32:14,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:32:14,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:32:14,741 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_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d5e20d9a05badce6014033a9e9f921320cf457 [2021-10-11 00:32:15,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:32:15,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:32:15,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:32:15,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:32:15,108 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:32:15,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/recursive-simple/afterrec-1.c [2021-10-11 00:32:15,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/data/a7d87faf0/dd0f74e273f84acbad47c94f3256e8af/FLAG34c982625 [2021-10-11 00:32:15,756 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:32:15,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/sv-benchmarks/c/recursive-simple/afterrec-1.c [2021-10-11 00:32:15,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/data/a7d87faf0/dd0f74e273f84acbad47c94f3256e8af/FLAG34c982625 [2021-10-11 00:32:16,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/data/a7d87faf0/dd0f74e273f84acbad47c94f3256e8af [2021-10-11 00:32:16,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:32:16,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:32:16,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:32:16,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:32:16,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:32:16,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7214b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16, skipping insertion in model container [2021-10-11 00:32:16,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:32:16,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:32:16,336 WARN L226 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_937cb208-b945-4e4e-8078-05004a40a1d0/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2021-10-11 00:32:16,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:32:16,356 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:32:16,411 WARN L226 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_937cb208-b945-4e4e-8078-05004a40a1d0/sv-benchmarks/c/recursive-simple/afterrec-1.c[318,331] [2021-10-11 00:32:16,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:32:16,433 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:32:16,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16 WrapperNode [2021-10-11 00:32:16,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:32:16,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:32:16,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:32:16,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:32:16,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:32:16,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:32:16,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:32:16,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:32:16,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... [2021-10-11 00:32:16,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:32:16,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:32:16,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:32:16,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:32:16,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:32:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-11 00:32:16,607 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-11 00:32:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:32:16,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:32:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:32:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:32:16,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:32:16,875 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 00:32:16,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:32:16 BoogieIcfgContainer [2021-10-11 00:32:16,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:32:16,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:32:16,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:32:16,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:32:16,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:32:16" (1/3) ... [2021-10-11 00:32:16,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7a6922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:32:16, skipping insertion in model container [2021-10-11 00:32:16,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:16" (2/3) ... [2021-10-11 00:32:16,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7a6922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:32:16, skipping insertion in model container [2021-10-11 00:32:16,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:32:16" (3/3) ... [2021-10-11 00:32:16,898 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2021-10-11 00:32:16,914 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:32:16,917 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:32:16,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:32:16,968 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:32:16,969 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:32:16,969 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:32:16,969 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:32:16,969 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:32:16,969 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:32:16,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:32:16,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:32:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 00:32:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:32:16,996 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:16,997 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:16,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:17,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2027498805, now seen corresponding path program 1 times [2021-10-11 00:32:17,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:17,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87584277] [2021-10-11 00:32:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:32:17,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:32:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:32:17,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:32:17,259 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:32:17,259 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:32:17,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:32:17,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:32:17 BoogieIcfgContainer [2021-10-11 00:32:17,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:32:17,307 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:32:17,307 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:32:17,307 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:32:17,308 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:32:16" (3/4) ... [2021-10-11 00:32:17,310 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:32:17,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_937cb208-b945-4e4e-8078-05004a40a1d0/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:32:17,404 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:32:17,407 INFO L168 Benchmark]: Toolchain (without parser) took 1270.32 ms. Allocated memory is still 132.1 MB. Free memory was 99.7 MB in the beginning and 81.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:17,409 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 75.5 MB. Free memory was 33.7 MB in the beginning and 33.6 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:32:17,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.08 ms. Allocated memory is still 132.1 MB. Free memory was 99.7 MB in the beginning and 108.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:17,412 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.65 ms. Allocated memory is still 132.1 MB. Free memory was 108.7 MB in the beginning and 107.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:32:17,412 INFO L168 Benchmark]: Boogie Preprocessor took 22.16 ms. Allocated memory is still 132.1 MB. Free memory was 107.4 MB in the beginning and 106.4 MB in the end (delta: 961.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:32:17,413 INFO L168 Benchmark]: RCFGBuilder took 376.71 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 96.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:17,416 INFO L168 Benchmark]: TraceAbstraction took 425.65 ms. Allocated memory is still 132.1 MB. Free memory was 95.8 MB in the beginning and 83.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:17,417 INFO L168 Benchmark]: Witness Printer took 97.70 ms. Allocated memory is still 132.1 MB. Free memory was 83.2 MB in the beginning and 81.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:17,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 75.5 MB. Free memory was 33.7 MB in the beginning and 33.6 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.08 ms. Allocated memory is still 132.1 MB. Free memory was 99.7 MB in the beginning and 108.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.65 ms. Allocated memory is still 132.1 MB. Free memory was 108.7 MB in the beginning and 107.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.16 ms. Allocated memory is still 132.1 MB. Free memory was 107.4 MB in the beginning and 106.4 MB in the end (delta: 961.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 376.71 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 96.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 425.65 ms. Allocated memory is still 132.1 MB. Free memory was 95.8 MB in the beginning and 83.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 97.70 ms. Allocated memory is still 132.1 MB. Free memory was 83.2 MB in the beginning and 81.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s 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! Received shutdown request...