./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE --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 fb642764a70597a56a9c7e88ddf473ddd44e8ae88be573923352b61cd2189845 ..................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-24 10:37:24,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:37:24,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:37:24,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:37:24,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:37:24,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:37:24,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:37:24,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:37:24,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:37:24,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:37:24,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:37:24,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:37:24,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:37:24,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:37:24,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:37:24,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:37:24,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:37:24,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:37:24,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:37:24,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:37:24,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:37:24,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:37:24,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:37:24,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:37:24,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:37:24,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:37:24,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:37:24,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:37:24,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:37:24,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:37:24,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:37:24,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:37:24,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:37:24,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:37:24,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:37:24,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:37:24,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:37:24,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:37:24,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:37:24,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:37:24,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:37:24,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:37:24,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:37:24,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:37:24,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:37:24,870 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:37:24,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:37:24,871 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:37:24,871 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:37:24,871 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:37:24,872 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:37:24,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:37:24,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:37:24,872 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:37:24,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:37:24,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:37:24,873 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:37:24,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:37:24,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:37:24,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:37:24,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:37:24,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:37:24,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:37:24,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:37:24,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:37:24,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:37:24,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:37:24,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:37:24,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:37:24,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:37:24,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:37:24,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:37:24,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:37:24,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:37:24,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:37:24,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:37:24,879 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:37:24,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:37:24,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:37:24,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:37:24,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:37:24,881 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_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb642764a70597a56a9c7e88ddf473ddd44e8ae88be573923352b61cd2189845 [2021-10-24 10:37:25,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:37:25,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:37:25,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:37:25,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:37:25,356 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:37:25,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2021-10-24 10:37:25,464 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/data/5ced3e18a/76b23653070e4a01a73f04f34271c156/FLAG990ac26d5 [2021-10-24 10:37:26,125 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:37:26,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2021-10-24 10:37:26,144 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/data/5ced3e18a/76b23653070e4a01a73f04f34271c156/FLAG990ac26d5 [2021-10-24 10:37:26,477 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/data/5ced3e18a/76b23653070e4a01a73f04f34271c156 [2021-10-24 10:37:26,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:37:26,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:37:26,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:37:26,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:37:26,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:37:26,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717eb98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26, skipping insertion in model container [2021-10-24 10:37:26,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:37:26,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:37:26,752 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_980ff655-a60f-4732-b2d8-a3fa952a6491/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-10-24 10:37:26,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:37:26,795 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:37:26,822 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_980ff655-a60f-4732-b2d8-a3fa952a6491/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-10-24 10:37:26,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:37:26,842 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:37:26,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26 WrapperNode [2021-10-24 10:37:26,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:37:26,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:37:26,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:37:26,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:37:26,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:37:26,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:37:26,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:37:26,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:37:26,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:37:26,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:37:26,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:37:26,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:37:26,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (1/1) ... [2021-10-24 10:37:26,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:37:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:37:26,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:37:26,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:37:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure A [2021-10-24 10:37:27,040 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2021-10-24 10:37:27,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:37:27,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:37:27,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:37:27,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:37:27,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:37:27,402 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-24 10:37:27,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:37:27 BoogieIcfgContainer [2021-10-24 10:37:27,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:37:27,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:37:27,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:37:27,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:37:27,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:37:26" (1/3) ... [2021-10-24 10:37:27,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2233b114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:37:27, skipping insertion in model container [2021-10-24 10:37:27,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:37:26" (2/3) ... [2021-10-24 10:37:27,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2233b114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:37:27, skipping insertion in model container [2021-10-24 10:37:27,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:37:27" (3/3) ... [2021-10-24 10:37:27,416 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2021-10-24 10:37:27,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:37:27,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:37:27,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:37:27,491 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 [2021-10-24 10:37:27,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:37:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-24 10:37:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 10:37:27,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:27,519 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:27,520 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1944176839, now seen corresponding path program 1 times [2021-10-24 10:37:27,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:27,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845648600] [2021-10-24 10:37:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:27,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:37:27,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:37:27,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845648600] [2021-10-24 10:37:27,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845648600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:37:27,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567361159] [2021-10-24 10:37:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:27,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:37:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:37:27,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:37:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:37:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:37:27,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:37:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:37:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:37:28,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:37:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 10:37:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567361159] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:37:28,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:37:28,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 6 [2021-10-24 10:37:28,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354717196] [2021-10-24 10:37:28,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:37:28,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:37:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:37:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:37:28,290 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-24 10:37:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:37:28,398 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-10-24 10:37:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:37:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-10-24 10:37:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:37:28,411 INFO L225 Difference]: With dead ends: 36 [2021-10-24 10:37:28,412 INFO L226 Difference]: Without dead ends: 16 [2021-10-24 10:37:28,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:37:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-24 10:37:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-24 10:37:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-24 10:37:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-24 10:37:28,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2021-10-24 10:37:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:37:28,465 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-24 10:37:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-24 10:37:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-24 10:37:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 10:37:28,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:37:28,469 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:37:28,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:37:28,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-24 10:37:28,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:37:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:37:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash -554895117, now seen corresponding path program 1 times [2021-10-24 10:37:28,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:37:28,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418163168] [2021-10-24 10:37:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:37:28,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:37:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:37:28,760 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:37:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:37:28,891 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:37:28,892 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:37:28,894 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:37:28,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:37:28,904 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:37:28,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:37:28 BoogieIcfgContainer [2021-10-24 10:37:28,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:37:28,990 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:37:28,990 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:37:28,990 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:37:28,992 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:37:27" (3/4) ... [2021-10-24 10:37:28,997 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 10:37:29,093 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:37:29,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:37:29,100 INFO L168 Benchmark]: Toolchain (without parser) took 2616.54 ms. Allocated memory is still 136.3 MB. Free memory was 97.5 MB in the beginning and 52.6 MB in the end (delta: 44.9 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:29,101 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 136.3 MB. Free memory was 109.4 MB in the beginning and 109.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:37:29,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.48 ms. Allocated memory is still 136.3 MB. Free memory was 97.5 MB in the beginning and 109.2 MB in the end (delta: -11.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:29,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.03 ms. Allocated memory is still 136.3 MB. Free memory was 109.2 MB in the beginning and 107.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:29,107 INFO L168 Benchmark]: Boogie Preprocessor took 44.23 ms. Allocated memory is still 136.3 MB. Free memory was 107.9 MB in the beginning and 107.1 MB in the end (delta: 733.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:37:29,110 INFO L168 Benchmark]: RCFGBuilder took 467.60 ms. Allocated memory is still 136.3 MB. Free memory was 107.1 MB in the beginning and 96.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:29,111 INFO L168 Benchmark]: TraceAbstraction took 1581.86 ms. Allocated memory is still 136.3 MB. Free memory was 96.0 MB in the beginning and 55.5 MB in the end (delta: 40.6 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:29,111 INFO L168 Benchmark]: Witness Printer took 108.37 ms. Allocated memory is still 136.3 MB. Free memory was 55.5 MB in the beginning and 52.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:37:29,114 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 136.3 MB. Free memory was 109.4 MB in the beginning and 109.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.48 ms. Allocated memory is still 136.3 MB. Free memory was 97.5 MB in the beginning and 109.2 MB in the end (delta: -11.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.03 ms. Allocated memory is still 136.3 MB. Free memory was 109.2 MB in the beginning and 107.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.23 ms. Allocated memory is still 136.3 MB. Free memory was 107.9 MB in the beginning and 107.1 MB in the end (delta: 733.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 467.60 ms. Allocated memory is still 136.3 MB. Free memory was 107.1 MB in the beginning and 96.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1581.86 ms. Allocated memory is still 136.3 MB. Free memory was 96.0 MB in the beginning and 55.5 MB in the end (delta: 40.6 MB). Peak memory consumption was 41.9 MB. Max. memory is 16.1 GB. * Witness Printer took 108.37 ms. Allocated memory is still 136.3 MB. Free memory was 55.5 MB in the beginning and 52.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 33]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int g; [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; VAL [g=0] [L30] CALL A(g,h) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, g=0] [L19] COND TRUE \read(a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, a1=6, a2=0, g=0] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, g=0] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, a1=0, a2=6, g=6] [L20] RET A(a2,a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, A(a2,a1)=-1, a1=6, a2=0, g=6] [L30] RET A(g,h) VAL [g=6] [L31] CALL A(g,h) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, g=6] [L19] COND TRUE \read(a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, a1=6, a2=0, g=6] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, g=6] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, a1=0, a2=6, g=6] [L20] RET A(a2,a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, A(a2,a1)=-3, a1=6, a2=0, g=6] [L31] RET A(g,h) VAL [g=6] [L32] COND TRUE \read(g) VAL [g=6] [L33] reach_error() VAL [g=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1420.8ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 14.5ms, AutomataDifference: 145.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 9 SDslu, 28 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.8ms SsaConstructionTime, 166.5ms SatisfiabilityAnalysisTime, 420.9ms InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 1 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 9/12 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 10:37:29,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_980ff655-a60f-4732-b2d8-a3fa952a6491/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...