./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer --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-a4ecdab [2020-11-30 00:51:10,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:51:10,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:51:10,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:51:10,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:51:10,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:51:10,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:51:10,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:51:10,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:51:10,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:51:10,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:51:10,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:51:10,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:51:10,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:51:10,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:51:10,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:51:10,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:51:10,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:51:10,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:51:10,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:51:10,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:51:10,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:51:10,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:51:10,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:51:10,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:51:10,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:51:10,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:51:10,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:51:10,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:51:10,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:51:10,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:51:10,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:51:10,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:51:10,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:51:10,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:51:10,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:51:10,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:51:10,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:51:10,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:51:10,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:51:10,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:51:10,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:51:10,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:51:10,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:51:10,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:51:10,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:51:10,350 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:51:10,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:51:10,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:51:10,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:51:10,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:51:10,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:51:10,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:51:10,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:51:10,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:51:10,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:51:10,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:51:10,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:51:10,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:51:10,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:51:10,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:51:10,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:51:10,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:51:10,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:51:10,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:51:10,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:51:10,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:51:10,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:51:10,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:51:10,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:51:10,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:51:10,360 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-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d5e20d9a05badce6014033a9e9f921320cf457 [2020-11-30 00:51:10,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:51:10,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:51:10,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:51:10,786 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:51:10,788 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:51:10,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/afterrec-1.c [2020-11-30 00:51:10,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/data/f80bb487d/f33ec3e03634405ea8ca3a5425518235/FLAG3f3ca0540 [2020-11-30 00:51:11,540 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:51:11,541 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/sv-benchmarks/c/recursive-simple/afterrec-1.c [2020-11-30 00:51:11,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/data/f80bb487d/f33ec3e03634405ea8ca3a5425518235/FLAG3f3ca0540 [2020-11-30 00:51:11,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/data/f80bb487d/f33ec3e03634405ea8ca3a5425518235 [2020-11-30 00:51:11,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:51:11,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:51:11,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:51:11,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:51:11,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:51:11,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:51:11" (1/1) ... [2020-11-30 00:51:11,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd08c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:11, skipping insertion in model container [2020-11-30 00:51:11,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:51:11" (1/1) ... [2020-11-30 00:51:11,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:51:11,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:51:12,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:51:12,279 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:51:12,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:51:12,314 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:51:12,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12 WrapperNode [2020-11-30 00:51:12,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:51:12,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:51:12,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:51:12,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:51:12,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:51:12,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:51:12,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:51:12,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:51:12,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... [2020-11-30 00:51:12,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:51:12,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:51:12,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:51:12,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:51:12,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/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 [2020-11-30 00:51:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-30 00:51:12,463 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-30 00:51:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:51:12,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:51:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:51:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:51:12,740 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:51:12,741 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:51:12,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:51:12 BoogieIcfgContainer [2020-11-30 00:51:12,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:51:12,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:51:12,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:51:12,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:51:12,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:51:11" (1/3) ... [2020-11-30 00:51:12,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527f62e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:51:12, skipping insertion in model container [2020-11-30 00:51:12,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:12" (2/3) ... [2020-11-30 00:51:12,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527f62e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:51:12, skipping insertion in model container [2020-11-30 00:51:12,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:51:12" (3/3) ... [2020-11-30 00:51:12,779 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2020-11-30 00:51:12,792 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:51:12,817 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:51:12,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:51:12,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:51:12,879 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:51:12,880 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:51:12,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:51:12,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:51:12,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:51:12,881 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:51:12,881 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:51:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-30 00:51:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 00:51:12,921 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:51:12,922 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:51:12,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:51:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:51:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1665029321, now seen corresponding path program 1 times [2020-11-30 00:51:12,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:51:12,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607089271] [2020-11-30 00:51:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:51:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:51:13,088 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:51:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:51:13,127 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:51:13,160 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:51:13,161 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:51:13,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:51:13,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:51:13 BoogieIcfgContainer [2020-11-30 00:51:13,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:51:13,199 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:51:13,199 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:51:13,200 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:51:13,200 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:51:12" (3/4) ... [2020-11-30 00:51:13,203 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:51:13,263 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3f6f57ea-f011-4d3e-9a69-eb159847d6db/bin/uautomizer/witness.graphml [2020-11-30 00:51:13,263 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:51:13,266 INFO L168 Benchmark]: Toolchain (without parser) took 1340.19 ms. Allocated memory is still 88.1 MB. Free memory was 56.8 MB in the beginning and 39.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:13,267 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory was 46.7 MB in the beginning and 46.6 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:51:13,269 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.16 ms. Allocated memory is still 88.1 MB. Free memory was 56.6 MB in the beginning and 66.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:13,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 88.1 MB. Free memory was 66.3 MB in the beginning and 65.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:51:13,271 INFO L168 Benchmark]: Boogie Preprocessor took 20.43 ms. Allocated memory is still 88.1 MB. Free memory was 65.1 MB in the beginning and 64.2 MB in the end (delta: 816.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:13,272 INFO L168 Benchmark]: RCFGBuilder took 369.76 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 54.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:13,273 INFO L168 Benchmark]: TraceAbstraction took 435.87 ms. Allocated memory is still 88.1 MB. Free memory was 53.8 MB in the beginning and 41.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:13,274 INFO L168 Benchmark]: Witness Printer took 64.13 ms. Allocated memory is still 88.1 MB. Free memory was 41.5 MB in the beginning and 39.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:13,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory was 46.7 MB in the beginning and 46.6 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 385.16 ms. Allocated memory is still 88.1 MB. Free memory was 56.6 MB in the beginning and 66.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 88.1 MB. Free memory was 66.3 MB in the beginning and 65.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.43 ms. Allocated memory is still 88.1 MB. Free memory was 65.1 MB in the beginning and 64.2 MB in the end (delta: 816.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 369.76 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 54.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 435.87 ms. Allocated memory is still 88.1 MB. Free memory was 53.8 MB in the beginning and 41.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 64.13 ms. Allocated memory is still 88.1 MB. Free memory was 41.5 MB in the beginning and 39.5 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: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] CALL f(4) [L6] COND FALSE !(n<3) [L7] n-- [L8] CALL f(n) [L6] COND FALSE !(n<3) [L7] n-- [L8] CALL f(n) [L6] COND TRUE n<3 [L8] RET f(n) [L3] __assert_fail("0", "afterrec-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 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=14occurred 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...