./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c47a69833f1a958e38c27482b535b2d176258e52297f9899a8926a996c05520 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:33:40,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:33:40,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:33:40,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:33:40,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:33:40,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:33:40,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:33:40,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:33:40,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:33:40,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:33:40,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:33:40,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:33:40,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:33:40,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:33:40,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:33:40,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:33:40,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:33:40,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:33:40,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:33:40,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:33:40,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:33:40,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:33:40,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:33:40,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:33:40,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:33:40,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:33:40,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:33:40,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:33:40,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:33:40,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:33:40,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:33:40,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:33:40,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:33:40,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:33:40,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:33:40,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:33:40,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:33:40,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:33:40,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:33:40,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:33:40,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:33:40,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:33:40,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:33:40,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:33:40,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:33:40,979 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:33:40,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:33:40,979 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:33:40,980 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:33:40,980 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:33:40,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:33:40,980 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:33:40,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:33:40,988 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:33:40,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:33:40,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:33:40,989 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:33:40,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:33:40,990 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:33:40,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:33:40,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:33:40,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:33:40,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:33:40,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:33:40,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:33:40,991 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:33:40,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:33:40,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:33:40,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:33:40,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:33:40,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:33:40,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:33:40,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:33:40,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:33:40,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:33:40,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:33:40,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:33:40,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:33:40,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:33:40,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:33:40,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:33:40,995 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c47a69833f1a958e38c27482b535b2d176258e52297f9899a8926a996c05520 [2021-10-29 05:33:41,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:33:41,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:33:41,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:33:41,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:33:41,365 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:33:41,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2021-10-29 05:33:41,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/data/16e32698d/9ee84d4e53e64be7adbd07f0dbe8f6ed/FLAG587ef9565 [2021-10-29 05:33:41,892 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:33:41,893 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2021-10-29 05:33:41,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/data/16e32698d/9ee84d4e53e64be7adbd07f0dbe8f6ed/FLAG587ef9565 [2021-10-29 05:33:42,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/data/16e32698d/9ee84d4e53e64be7adbd07f0dbe8f6ed [2021-10-29 05:33:42,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:33:42,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:33:42,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:33:42,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:33:42,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:33:42,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61147097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42, skipping insertion in model container [2021-10-29 05:33:42,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:33:42,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:33:42,542 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c[946,959] [2021-10-29 05:33:42,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:33:42,568 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:33:42,590 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c[946,959] [2021-10-29 05:33:42,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:33:42,608 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:33:42,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42 WrapperNode [2021-10-29 05:33:42,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:33:42,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:33:42,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:33:42,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:33:42,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:33:42,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:33:42,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:33:42,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:33:42,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:33:42,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:33:42,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:33:42,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:33:42,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (1/1) ... [2021-10-29 05:33:42,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:33:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:33:42,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:33:42,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:33:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:33:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-10-29 05:33:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-10-29 05:33:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:33:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-10-29 05:33:42,785 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-10-29 05:33:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:33:42,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:33:43,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:33:43,095 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-29 05:33:43,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:43 BoogieIcfgContainer [2021-10-29 05:33:43,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:33:43,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:33:43,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:33:43,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:33:43,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:33:42" (1/3) ... [2021-10-29 05:33:43,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ab12df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:33:43, skipping insertion in model container [2021-10-29 05:33:43,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:33:42" (2/3) ... [2021-10-29 05:33:43,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ab12df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:33:43, skipping insertion in model container [2021-10-29 05:33:43,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:43" (3/3) ... [2021-10-29 05:33:43,120 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2021-10-29 05:33:43,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:33:43,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:33:43,207 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:33:43,216 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:33:43,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:33:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-29 05:33:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-29 05:33:43,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:43,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:33:43,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:33:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2097990987, now seen corresponding path program 1 times [2021-10-29 05:33:43,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:33:43,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498423023] [2021-10-29 05:33:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:43,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:33:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:33:43,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:33:43,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498423023] [2021-10-29 05:33:43,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498423023] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:43,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:33:43,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:33:43,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433590478] [2021-10-29 05:33:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:33:43,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:33:43,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:33:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:33:43,568 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 05:33:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:43,628 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-10-29 05:33:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:33:43,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-29 05:33:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:43,641 INFO L225 Difference]: With dead ends: 36 [2021-10-29 05:33:43,641 INFO L226 Difference]: Without dead ends: 26 [2021-10-29 05:33:43,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:33:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-29 05:33:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-29 05:33:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-29 05:33:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-10-29 05:33:43,698 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2021-10-29 05:33:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:43,699 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-10-29 05:33:43,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 05:33:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-10-29 05:33:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:33:43,702 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:43,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:33:43,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:33:43,704 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:33:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1328370967, now seen corresponding path program 1 times [2021-10-29 05:33:43,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:33:43,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207867268] [2021-10-29 05:33:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:43,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:33:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:33:43,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:33:43,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207867268] [2021-10-29 05:33:43,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207867268] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:43,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:33:43,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:33:43,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469406356] [2021-10-29 05:33:43,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:33:43,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:33:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:33:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:33:43,808 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 05:33:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:43,907 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-10-29 05:33:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:33:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-29 05:33:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:43,909 INFO L225 Difference]: With dead ends: 32 [2021-10-29 05:33:43,909 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:33:43,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:33:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:33:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-29 05:33:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-29 05:33:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-10-29 05:33:43,944 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2021-10-29 05:33:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:43,945 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-10-29 05:33:43,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-29 05:33:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-10-29 05:33:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 05:33:43,947 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:43,947 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:33:43,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:33:43,948 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:33:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:43,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1296553538, now seen corresponding path program 1 times [2021-10-29 05:33:43,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:33:43,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29854417] [2021-10-29 05:33:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:43,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:33:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:33:44,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:33:44,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29854417] [2021-10-29 05:33:44,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29854417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:33:44,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422805219] [2021-10-29 05:33:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:44,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:33:44,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:33:44,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:33:44,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:33:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:33:44,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:33:44,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:33:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:33:44,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:33:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:33:44,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422805219] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:33:44,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169581316] [2021-10-29 05:33:44,695 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-10-29 05:33:44,695 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:33:44,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:33:44,705 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:33:44,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:33:44,748 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,754 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:33:44,755 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:33:44,757 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:33:44,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:33:44,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-29 05:33:44,782 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-10-29 05:33:44,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-29 05:33:44,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:33:44,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:33:44,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:33:44,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:33:44,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:33:44,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-29 05:33:44,913 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:33:44,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,919 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:33:44,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:33:44,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:33:44,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,952 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:44,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:33:44,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:119, output treesize:94 [2021-10-29 05:33:44,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:44,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:44,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-29 05:33:44,997 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,005 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-29 05:33:45,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-29 05:33:45,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-29 05:33:45,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:33:45,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:33:45,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:33:45,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:33:45,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:45,079 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:45,095 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 56 for LOIs [2021-10-29 05:33:45,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:45,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:33:45,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:45,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111 [2021-10-29 05:33:45,161 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:33:45,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-10-29 05:33:45,168 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 56 for LOIs [2021-10-29 05:33:45,173 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:33:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [169581316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:33:45,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-29 05:33:45,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 7, 7] total 16 [2021-10-29 05:33:45,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418534811] [2021-10-29 05:33:45,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-29 05:33:45,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:33:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-29 05:33:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-29 05:33:45,914 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-29 05:33:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:33:46,051 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-10-29 05:33:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:33:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-10-29 05:33:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:33:46,054 INFO L225 Difference]: With dead ends: 64 [2021-10-29 05:33:46,054 INFO L226 Difference]: Without dead ends: 40 [2021-10-29 05:33:46,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-29 05:33:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-29 05:33:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-10-29 05:33:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-29 05:33:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-10-29 05:33:46,065 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-10-29 05:33:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:33:46,066 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-10-29 05:33:46,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-29 05:33:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-10-29 05:33:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-29 05:33:46,068 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:33:46,068 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:33:46,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:33:46,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:33:46,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:33:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:33:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1264325820, now seen corresponding path program 1 times [2021-10-29 05:33:46,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:33:46,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426758583] [2021-10-29 05:33:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:33:46,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:33:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:33:46,314 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:33:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:33:46,370 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:33:46,371 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:33:46,373 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:33:46,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-29 05:33:46,378 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-10-29 05:33:46,381 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:33:46,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:33:46 BoogieIcfgContainer [2021-10-29 05:33:46,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:33:46,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:33:46,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:33:46,429 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:33:46,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:33:43" (3/4) ... [2021-10-29 05:33:46,432 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:33:46,497 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:33:46,497 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:33:46,498 INFO L168 Benchmark]: Toolchain (without parser) took 4209.50 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 96.3 MB in the beginning and 116.9 MB in the end (delta: -20.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,498 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 88.1 MB. Free memory is still 44.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:33:46,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.46 ms. Allocated memory is still 130.0 MB. Free memory was 96.0 MB in the beginning and 105.3 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,501 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.10 ms. Allocated memory is still 130.0 MB. Free memory was 105.3 MB in the beginning and 103.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,502 INFO L168 Benchmark]: Boogie Preprocessor took 42.68 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 102.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,502 INFO L168 Benchmark]: RCFGBuilder took 407.56 ms. Allocated memory is still 130.0 MB. Free memory was 102.8 MB in the beginning and 92.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,503 INFO L168 Benchmark]: TraceAbstraction took 3329.05 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 91.9 MB in the beginning and 119.0 MB in the end (delta: -27.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,505 INFO L168 Benchmark]: Witness Printer took 68.23 ms. Allocated memory is still 157.3 MB. Free memory was 119.0 MB in the beginning and 116.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:33:46,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 88.1 MB. Free memory is still 44.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.46 ms. Allocated memory is still 130.0 MB. Free memory was 96.0 MB in the beginning and 105.3 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.10 ms. Allocated memory is still 130.0 MB. Free memory was 105.3 MB in the beginning and 103.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.68 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 102.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 407.56 ms. Allocated memory is still 130.0 MB. Free memory was 102.8 MB in the beginning and 92.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3329.05 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 91.9 MB in the beginning and 119.0 MB in the end (delta: -27.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.1 GB. * Witness Printer took 68.23 ms. Allocated memory is still 157.3 MB. Free memory was 119.0 MB in the beginning and 116.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 2; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 1 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 31 SDslu, 190 SDs, 0 SdLazy, 85 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 17, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 172 SizeOfPredicates, 2 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/12 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: OVERALL_TIME[ms]: 479, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 6, TOOLS_POST_APPLICATIONS: 13, TOOLS_POST_TIME[ms]: 225, TOOLS_POST_CALL_APPLICATIONS: 8, TOOLS_POST_CALL_TIME[ms]: 85, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME[ms]: 46, TOOLS_QUANTIFIERELIM_APPLICATIONS: 27, TOOLS_QUANTIFIERELIM_TIME[ms]: 332, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 215, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 35, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 1, DOMAIN_JOIN_TIME[ms]: 42, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME[ms]: 0, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME[ms]: 25, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 0, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME[ms]: 97, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 97, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 4, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 14, DAG_COMPRESSION_PROCESSED_NODES: 142, DAG_COMPRESSION_RETAINED_NODES: 53, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:33:46,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0815544-f817-4eda-8299-aeadd8102c88/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...