./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7757e3f263599cd02799bfad01adb3bcaa895e82 .............................................................................................................................................................................................................................................................................. 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 0.1.24-678e011 [2019-11-20 09:50:33,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 09:50:33,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 09:50:33,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 09:50:33,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 09:50:33,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 09:50:33,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 09:50:33,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 09:50:33,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 09:50:33,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 09:50:33,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 09:50:33,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 09:50:33,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 09:50:33,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 09:50:33,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 09:50:33,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 09:50:33,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 09:50:33,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 09:50:33,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 09:50:33,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 09:50:33,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 09:50:33,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 09:50:33,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 09:50:33,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 09:50:33,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 09:50:33,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 09:50:33,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 09:50:33,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 09:50:33,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 09:50:33,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 09:50:33,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 09:50:33,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 09:50:33,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 09:50:33,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 09:50:33,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 09:50:33,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 09:50:33,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 09:50:33,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 09:50:33,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 09:50:33,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 09:50:33,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 09:50:33,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 09:50:33,311 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 09:50:33,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 09:50:33,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 09:50:33,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 09:50:33,312 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 09:50:33,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 09:50:33,313 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 09:50:33,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 09:50:33,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 09:50:33,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 09:50:33,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 09:50:33,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 09:50:33,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 09:50:33,314 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 09:50:33,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 09:50:33,315 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 09:50:33,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 09:50:33,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 09:50:33,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 09:50:33,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 09:50:33,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 09:50:33,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 09:50:33,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 09:50:33,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 09:50:33,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 09:50:33,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 09:50:33,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 09:50:33,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 09:50:33,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_dc9c44a3-7cec-4123-a091-904b2f458f8b/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(__VERIFIER_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 -> 7757e3f263599cd02799bfad01adb3bcaa895e82 [2019-11-20 09:50:33,483 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 09:50:33,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 09:50:33,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 09:50:33,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 09:50:33,501 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 09:50:33,509 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2019-11-20 09:50:33,582 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/data/d5440cb37/a0040969c65f45df89de8d9f48ff177f/FLAG3450d0878 [2019-11-20 09:50:33,980 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 09:50:33,981 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2019-11-20 09:50:33,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/data/d5440cb37/a0040969c65f45df89de8d9f48ff177f/FLAG3450d0878 [2019-11-20 09:50:34,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/data/d5440cb37/a0040969c65f45df89de8d9f48ff177f [2019-11-20 09:50:34,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 09:50:34,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 09:50:34,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 09:50:34,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 09:50:34,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 09:50:34,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f54f7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34, skipping insertion in model container [2019-11-20 09:50:34,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,451 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 09:50:34,471 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 09:50:34,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:50:34,626 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 09:50:34,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:50:34,725 INFO L192 MainTranslator]: Completed translation [2019-11-20 09:50:34,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34 WrapperNode [2019-11-20 09:50:34,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 09:50:34,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 09:50:34,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 09:50:34,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 09:50:34,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 09:50:34,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 09:50:34,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 09:50:34,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 09:50:34,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... [2019-11-20 09:50:34,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 09:50:34,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 09:50:34,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 09:50:34,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 09:50:34,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/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 [2019-11-20 09:50:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-11-20 09:50:34,892 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-11-20 09:50:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 09:50:34,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 09:50:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2019-11-20 09:50:34,895 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2019-11-20 09:50:35,083 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 09:50:35,083 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 09:50:35,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:50:35 BoogieIcfgContainer [2019-11-20 09:50:35,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 09:50:35,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 09:50:35,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 09:50:35,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 09:50:35,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:50:34" (1/3) ... [2019-11-20 09:50:35,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a4ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:50:35, skipping insertion in model container [2019-11-20 09:50:35,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:50:34" (2/3) ... [2019-11-20 09:50:35,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a4ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:50:35, skipping insertion in model container [2019-11-20 09:50:35,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:50:35" (3/3) ... [2019-11-20 09:50:35,094 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2019-11-20 09:50:35,105 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 09:50:35,112 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-20 09:50:35,126 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-20 09:50:35,154 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 09:50:35,154 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 09:50:35,154 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 09:50:35,154 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 09:50:35,155 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 09:50:35,155 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 09:50:35,155 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 09:50:35,155 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 09:50:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-20 09:50:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 09:50:35,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:50:35,182 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:50:35,183 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:50:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:50:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1282022558, now seen corresponding path program 1 times [2019-11-20 09:50:35,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:50:35,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791092348] [2019-11-20 09:50:35,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:50:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:50:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:50:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:50:35,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791092348] [2019-11-20 09:50:35,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:50:35,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 09:50:35,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009668631] [2019-11-20 09:50:35,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 09:50:35,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:50:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 09:50:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-20 09:50:35,500 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-11-20 09:50:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:50:35,660 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-20 09:50:35,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 09:50:35,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-20 09:50:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:50:35,671 INFO L225 Difference]: With dead ends: 30 [2019-11-20 09:50:35,671 INFO L226 Difference]: Without dead ends: 19 [2019-11-20 09:50:35,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-20 09:50:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-20 09:50:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-20 09:50:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-20 09:50:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-20 09:50:35,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2019-11-20 09:50:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:50:35,718 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-20 09:50:35,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 09:50:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-20 09:50:35,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 09:50:35,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:50:35,720 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 09:50:35,720 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 09:50:35,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:50:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1404533112, now seen corresponding path program 1 times [2019-11-20 09:50:35,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:50:35,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869021487] [2019-11-20 09:50:35,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:50:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:50:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:50:35,764 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:50:35,764 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 09:50:35,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:50:35 BoogieIcfgContainer [2019-11-20 09:50:35,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 09:50:35,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 09:50:35,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 09:50:35,788 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 09:50:35,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:50:35" (3/4) ... [2019-11-20 09:50:35,791 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 09:50:35,838 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dc9c44a3-7cec-4123-a091-904b2f458f8b/bin/uautomizer/witness.graphml [2019-11-20 09:50:35,838 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 09:50:35,841 INFO L168 Benchmark]: Toolchain (without parser) took 1409.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -139.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 09:50:35,845 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:50:35,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -197.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-20 09:50:35,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:50:35,850 INFO L168 Benchmark]: Boogie Preprocessor took 18.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:50:35,851 INFO L168 Benchmark]: RCFGBuilder took 300.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-20 09:50:35,851 INFO L168 Benchmark]: TraceAbstraction took 701.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. [2019-11-20 09:50:35,852 INFO L168 Benchmark]: Witness Printer took 50.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 09:50:35,860 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 292.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -197.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.39 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.54 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 300.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 701.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.2 MB). Peak memory consumption was 32.2 MB. Max. memory is 11.5 GB. * Witness Printer took 50.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] CALL f(4) VAL [\old(n)=4] [L7] COND FALSE !(n<3) [L8] n-- VAL [\old(n)=4, n=3] [L9] CALL f2(n) VAL [\old(n)=3] [L14] COND FALSE !(n<3) [L15] n-- VAL [\old(n)=3, n=2] [L16] CALL f(n) VAL [\old(n)=2] [L7] COND TRUE n<3 VAL [\old(n)=2, n=2] [L16] RET f(n) VAL [\old(n)=3, n=2] [L17] __VERIFIER_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 3 SDslu, 46 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...