./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.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_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/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_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/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_e1cb125c-af42-4d28-a4bf-be278149b0a3/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 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:55:47,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:55:47,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:55:47,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:55:47,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:55:47,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:55:47,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:55:47,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:55:47,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:55:47,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:55:47,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:55:47,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:55:47,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:55:47,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:55:47,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:55:47,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:55:47,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:55:47,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:55:47,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:55:47,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:55:47,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:55:47,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:55:47,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:55:47,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:55:47,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:55:47,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:55:47,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:55:47,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:55:47,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:55:47,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:55:47,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:55:47,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:55:47,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:55:47,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:55:47,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:55:47,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:55:47,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:55:47,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:55:47,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:55:47,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:55:47,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:55:47,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:55:47,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:55:47,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:55:47,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:55:47,976 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:55:47,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:55:47,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:55:47,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:55:47,977 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:55:47,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:55:47,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:55:47,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:55:47,987 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:55:47,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:55:47,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:55:47,988 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:55:47,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:55:47,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:55:47,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:55:47,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:55:47,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:55:47,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:55:47,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:55:47,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:55:47,991 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:55:47,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:55:47,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:55:47,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:55:47,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:55:47,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:55:47,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:55:47,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:55:47,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:55:47,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:55:47,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:55:47,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:55:47,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:55:47,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:55:47,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:55:47,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:55:47,998 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_e1cb125c-af42-4d28-a4bf-be278149b0a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa [2021-10-29 05:55:48,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:55:48,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:55:48,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:55:48,396 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:55:48,397 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:55:48,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-29 05:55:48,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/data/383fae048/79c801a63fbc477899e5b37473e49e25/FLAGcce76b034 [2021-10-29 05:55:49,098 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:55:49,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-29 05:55:49,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/data/383fae048/79c801a63fbc477899e5b37473e49e25/FLAGcce76b034 [2021-10-29 05:55:49,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/data/383fae048/79c801a63fbc477899e5b37473e49e25 [2021-10-29 05:55:49,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:55:49,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:55:49,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:55:49,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:55:49,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:55:49,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b2d2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49, skipping insertion in model container [2021-10-29 05:55:49,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:55:49,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:55:49,740 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_e1cb125c-af42-4d28-a4bf-be278149b0a3/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-29 05:55:49,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:55:49,775 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:55:49,792 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_e1cb125c-af42-4d28-a4bf-be278149b0a3/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-29 05:55:49,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:55:49,817 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:55:49,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49 WrapperNode [2021-10-29 05:55:49,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:55:49,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:55:49,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:55:49,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:55:49,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:55:49,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:55:49,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:55:49,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:55:49,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:55:49,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:55:49,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:55:49,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:55:49,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (1/1) ... [2021-10-29 05:55:49,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:55:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:49,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:55:49,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:55:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:55:49,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:55:49,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:55:49,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:55:50,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:55:50,444 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-29 05:55:50,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:55:50 BoogieIcfgContainer [2021-10-29 05:55:50,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:55:50,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:55:50,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:55:50,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:55:50,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:55:49" (1/3) ... [2021-10-29 05:55:50,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426691c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:55:50, skipping insertion in model container [2021-10-29 05:55:50,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:55:49" (2/3) ... [2021-10-29 05:55:50,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426691c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:55:50, skipping insertion in model container [2021-10-29 05:55:50,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:55:50" (3/3) ... [2021-10-29 05:55:50,477 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-10-29 05:55:50,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:55:50,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-29 05:55:50,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:55:50,584 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 05:55:50,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-29 05:55:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:55:50,626 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:50,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:55:50,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 100327247, now seen corresponding path program 1 times [2021-10-29 05:55:50,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:50,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655688947] [2021-10-29 05:55:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:50,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:50,908 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 05:55:50,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:50,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655688947] [2021-10-29 05:55:50,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655688947] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:50,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:50,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:55:50,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966216244] [2021-10-29 05:55:50,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:55:50,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:55:50,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:55:50,940 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:50,958 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-29 05:55:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:55:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:55:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:50,970 INFO L225 Difference]: With dead ends: 25 [2021-10-29 05:55:50,971 INFO L226 Difference]: Without dead ends: 11 [2021-10-29 05:55:50,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:55:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-29 05:55:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-29 05:55:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-29 05:55:51,020 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-29 05:55:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:51,021 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-29 05:55:51,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-29 05:55:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:55:51,023 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:51,024 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:55:51,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:55:51,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2021-10-29 05:55:51,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:51,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998431904] [2021-10-29 05:55:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:51,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:51,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:55:51,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710909721] [2021-10-29 05:55:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:51,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:51,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:51,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:51,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:55:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-29 05:55:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:51,344 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 05:55:51,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:51,455 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 05:55:51,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:51,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998431904] [2021-10-29 05:55:51,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:51,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710909721] [2021-10-29 05:55:51,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710909721] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:51,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:51,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-29 05:55:51,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404088541] [2021-10-29 05:55:51,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:55:51,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:55:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:55:51,461 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:51,516 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-29 05:55:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:55:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:55:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:51,518 INFO L225 Difference]: With dead ends: 25 [2021-10-29 05:55:51,519 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 05:55:51,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:55:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 05:55:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-10-29 05:55:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-29 05:55:51,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5 [2021-10-29 05:55:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:51,526 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-29 05:55:51,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-29 05:55:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 05:55:51,527 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:51,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 05:55:51,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:55:51,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:51,740 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1211488473, now seen corresponding path program 1 times [2021-10-29 05:55:51,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:51,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556776435] [2021-10-29 05:55:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:51,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:51,822 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 05:55:51,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:51,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556776435] [2021-10-29 05:55:51,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556776435] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:51,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:51,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:55:51,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177814965] [2021-10-29 05:55:51,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:55:51,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:51,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:55:51,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:55:51,826 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:51,843 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-10-29 05:55:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:55:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-29 05:55:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:51,844 INFO L225 Difference]: With dead ends: 18 [2021-10-29 05:55:51,844 INFO L226 Difference]: Without dead ends: 14 [2021-10-29 05:55:51,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:55:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-29 05:55:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-29 05:55:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-29 05:55:51,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2021-10-29 05:55:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:51,849 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-29 05:55:51,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-29 05:55:51,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-29 05:55:51,850 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:51,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:51,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:55:51,851 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash -263176832, now seen corresponding path program 1 times [2021-10-29 05:55:51,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:51,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518506739] [2021-10-29 05:55:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:51,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:51,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:55:51,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949289419] [2021-10-29 05:55:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:51,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:51,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:51,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:55:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:52,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-29 05:55:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:52,197 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 05:55:52,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:52,395 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 05:55:52,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:52,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518506739] [2021-10-29 05:55:52,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:52,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949289419] [2021-10-29 05:55:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949289419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:55:52,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:55:52,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-10-29 05:55:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595278843] [2021-10-29 05:55:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:55:52,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:55:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:55:52,404 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:52,532 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-29 05:55:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:55:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-29 05:55:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:52,534 INFO L225 Difference]: With dead ends: 18 [2021-10-29 05:55:52,534 INFO L226 Difference]: Without dead ends: 12 [2021-10-29 05:55:52,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:55:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-29 05:55:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-29 05:55:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-29 05:55:52,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-10-29 05:55:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:52,542 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-29 05:55:52,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-29 05:55:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:55:52,544 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:52,544 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:55:52,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-29 05:55:52,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:52,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1349036158, now seen corresponding path program 1 times [2021-10-29 05:55:52,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:52,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607458720] [2021-10-29 05:55:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:52,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:52,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:55:52,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432457944] [2021-10-29 05:55:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:52,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:52,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:52,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:52,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:55:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:55:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:55:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:52,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:53,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:53,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607458720] [2021-10-29 05:55:53,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:53,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432457944] [2021-10-29 05:55:53,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432457944] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:55:53,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493083328] [2021-10-29 05:55:53,086 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:55:53,087 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:55:53,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:55:53,116 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:55:53,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:55:53,182 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-29 05:55:53,188 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:53,189 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,190 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:55:53,192 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:53,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,193 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:55:53,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:55:53,232 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_21|], 21=[|v_#valid_22|]} [2021-10-29 05:55:53,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:55:53,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:55:53,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:55:53,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,281 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 05:55:53,282 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,283 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:55:53,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:55:53,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:53,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:53,368 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 05:55:53,369 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:55:53,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:55:53,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:53,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-29 05:55:53,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:55:53,443 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:312, output treesize:131 [2021-10-29 05:55:53,453 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-29 05:55:53,488 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-10-29 05:55:53,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-10-29 05:55:53,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,526 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:55:53,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-29 05:55:53,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 166 [2021-10-29 05:55:53,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,777 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:53,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 204 [2021-10-29 05:55:53,814 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:53,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:53,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-10-29 05:55:53,875 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 294 [2021-10-29 05:55:53,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:53,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:54,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:54,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:54,045 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-10-29 05:55:54,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-10-29 05:55:54,055 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:54,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-29 05:55:54,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:54,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:54,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:54,089 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-29 05:55:54,090 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:54,094 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:54,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-29 05:55:54,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-10-29 05:55:54,131 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-10-29 05:55:54,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-10-29 05:55:54,141 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.5 percent of original size [2021-10-29 05:55:54,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-29 05:55:54,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:54,161 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-29 05:55:54,165 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:55:54,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:54,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:55:54,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-29 05:55:54,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039526128] [2021-10-29 05:55:54,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:55:54,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:54,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:55:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-29 05:55:54,938 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:55,024 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-29 05:55:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:55:55,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:55:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:55,025 INFO L225 Difference]: With dead ends: 27 [2021-10-29 05:55:55,025 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 05:55:55,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-10-29 05:55:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 05:55:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-29 05:55:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-29 05:55:55,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 10 [2021-10-29 05:55:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:55,032 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-29 05:55:55,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-29 05:55:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-29 05:55:55,034 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:55,034 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-29 05:55:55,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:55:55,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:55,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash 853809027, now seen corresponding path program 2 times [2021-10-29 05:55:55,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:55,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247198286] [2021-10-29 05:55:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:55,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:55,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:55:55,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30146616] [2021-10-29 05:55:55,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-29 05:55:55,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:55,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:55,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:55:55,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-29 05:55:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:55:55,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-29 05:55:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:55,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:55,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:55,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247198286] [2021-10-29 05:55:55,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:55,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30146616] [2021-10-29 05:55:55,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30146616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:55:55,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487484222] [2021-10-29 05:55:55,699 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:55:55,699 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:55:55,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:55:55,700 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:55:55,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:55:55,718 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-29 05:55:55,720 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:55,721 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:55:55,723 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:55,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,725 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:55:55,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:55:55,755 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_22|], 21=[|v_#valid_23|]} [2021-10-29 05:55:55,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:55:55,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:55:55,767 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,768 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:55:55,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,789 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 05:55:55,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,790 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:55:55,791 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:55:55,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:55,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:55,830 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 05:55:55,831 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:55:55,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,837 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:55:55,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:55,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,854 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-29 05:55:55,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:55:55,861 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:312, output treesize:131 [2021-10-29 05:55:55,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-29 05:55:55,884 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-10-29 05:55:55,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-10-29 05:55:55,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:55:55,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:55,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:55,995 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-29 05:55:56,003 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,016 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 166 [2021-10-29 05:55:56,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,031 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:56,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 204 [2021-10-29 05:55:56,052 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:56,056 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-10-29 05:55:56,095 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 294 [2021-10-29 05:55:56,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:56,197 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-10-29 05:55:56,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-10-29 05:55:56,203 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-29 05:55:56,213 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,216 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:56,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-10-29 05:55:56,227 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:56,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-29 05:55:56,247 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 160 [2021-10-29 05:55:56,258 INFO L180 QuantifierPusher]: treesize reduction 36, result has 66.7 percent of original size [2021-10-29 05:55:56,260 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-10-29 05:55:56,265 INFO L180 QuantifierPusher]: treesize reduction 4, result has 94.5 percent of original size [2021-10-29 05:55:56,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-29 05:55:56,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:56,282 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-29 05:55:56,286 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:55:57,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:57,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:55:57,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-29 05:55:57,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182768791] [2021-10-29 05:55:57,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-29 05:55:57,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:55:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-29 05:55:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-29 05:55:57,035 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:55:57,223 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-10-29 05:55:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-29 05:55:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-29 05:55:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:55:57,225 INFO L225 Difference]: With dead ends: 51 [2021-10-29 05:55:57,225 INFO L226 Difference]: Without dead ends: 47 [2021-10-29 05:55:57,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-10-29 05:55:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-29 05:55:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-29 05:55:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-29 05:55:57,236 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 22 [2021-10-29 05:55:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:55:57,237 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-29 05:55:57,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:55:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-29 05:55:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-29 05:55:57,239 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:55:57,239 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-10-29 05:55:57,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:55:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:57,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:55:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:55:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 353376013, now seen corresponding path program 3 times [2021-10-29 05:55:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:55:57,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107924546] [2021-10-29 05:55:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:55:57,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:55:57,478 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:55:57,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956079471] [2021-10-29 05:55:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-29 05:55:57,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:55:57,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:55:57,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:55:57,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:55:57,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-29 05:55:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-29 05:55:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-29 05:55:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:55:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:55:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:55:58,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:55:58,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107924546] [2021-10-29 05:55:58,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:55:58,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956079471] [2021-10-29 05:55:58,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956079471] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:55:58,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818692663] [2021-10-29 05:55:58,296 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 05:55:58,296 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 05:55:58,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-29 05:55:58,297 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-29 05:55:58,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-29 05:55:58,308 INFO L180 QuantifierPusher]: treesize reduction 5, result has 97.1 percent of original size [2021-10-29 05:55:58,310 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:58,310 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:55:58,312 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:58,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,314 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-29 05:55:58,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-10-29 05:55:58,324 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_23|], 21=[|v_#valid_24|]} [2021-10-29 05:55:58,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,347 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 05:55:58,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:55:58,349 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-29 05:55:58,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:58,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-29 05:55:58,359 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:55:58,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,360 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-29 05:55:58,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:58,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-29 05:55:58,393 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 05:55:58,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,396 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:55:58,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-29 05:55:58,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-29 05:55:58,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,422 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-29 05:55:58,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-29 05:55:58,423 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:312, output treesize:131 [2021-10-29 05:55:58,428 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,431 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-29 05:55:58,437 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.2 percent of original size [2021-10-29 05:55:58,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-29 05:55:58,448 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 170 [2021-10-29 05:55:58,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 05:55:58,509 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-29 05:55:58,519 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:55:58,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,541 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:58,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-10-29 05:55:58,579 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-29 05:55:58,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 198 [2021-10-29 05:55:58,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 284 [2021-10-29 05:55:58,616 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-29 05:55:58,627 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.2 percent of original size [2021-10-29 05:55:58,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-29 05:55:58,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,643 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 158 [2021-10-29 05:55:58,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:55:58,656 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-29 05:55:58,659 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-29 05:56:00,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-29 05:56:00,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:56:00,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-29 05:56:00,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229962075] [2021-10-29 05:56:00,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-29 05:56:00,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:56:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-29 05:56:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2021-10-29 05:56:00,177 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:56:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:56:00,737 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2021-10-29 05:56:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-29 05:56:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-29 05:56:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:56:00,739 INFO L225 Difference]: With dead ends: 91 [2021-10-29 05:56:00,740 INFO L226 Difference]: Without dead ends: 87 [2021-10-29 05:56:00,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=683, Invalid=1767, Unknown=0, NotChecked=0, Total=2450 [2021-10-29 05:56:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-29 05:56:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-29 05:56:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:56:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-10-29 05:56:00,757 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 46 [2021-10-29 05:56:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:56:00,757 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-10-29 05:56:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:56:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-10-29 05:56:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-29 05:56:00,762 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:56:00,762 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2021-10-29 05:56:00,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-29 05:56:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-29 05:56:00,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:56:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:56:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -379475725, now seen corresponding path program 4 times [2021-10-29 05:56:00,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:56:00,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122236807] [2021-10-29 05:56:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:56:00,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:56:01,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-29 05:56:01,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551554172] [2021-10-29 05:56:01,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-29 05:56:01,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:56:01,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:56:01,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:56:01,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 05:56:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:56:01,245 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:56:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:56:01,440 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:56:01,441 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:56:01,442 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:56:01,444 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:56:01,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:56:01,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-29 05:56:01,665 INFO L731 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2021-10-29 05:56:01,669 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:56:01,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:56:01 BoogieIcfgContainer [2021-10-29 05:56:01,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:56:01,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:56:01,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:56:01,781 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:56:01,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:55:50" (3/4) ... [2021-10-29 05:56:01,784 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:56:01,941 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:56:01,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:56:01,942 INFO L168 Benchmark]: Toolchain (without parser) took 12464.65 ms. Allocated memory was 102.8 MB in the beginning and 178.3 MB in the end (delta: 75.5 MB). Free memory was 70.7 MB in the beginning and 87.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 59.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:56:01,943 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 102.8 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:56:01,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.85 ms. Allocated memory was 102.8 MB in the beginning and 144.7 MB in the end (delta: 41.9 MB). Free memory was 70.4 MB in the beginning and 120.4 MB in the end (delta: -50.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:56:01,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.14 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 118.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:56:01,944 INFO L168 Benchmark]: Boogie Preprocessor took 29.23 ms. Allocated memory is still 144.7 MB. Free memory was 118.3 MB in the beginning and 117.6 MB in the end (delta: 676.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:56:01,945 INFO L168 Benchmark]: RCFGBuilder took 553.62 ms. Allocated memory is still 144.7 MB. Free memory was 117.6 MB in the beginning and 102.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:56:01,945 INFO L168 Benchmark]: TraceAbstraction took 11329.92 ms. Allocated memory was 144.7 MB in the beginning and 178.3 MB in the end (delta: 33.6 MB). Free memory was 102.9 MB in the beginning and 95.5 MB in the end (delta: 7.4 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. [2021-10-29 05:56:01,945 INFO L168 Benchmark]: Witness Printer took 160.61 ms. Allocated memory is still 178.3 MB. Free memory was 95.5 MB in the beginning and 87.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:56:01,948 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 102.8 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.85 ms. Allocated memory was 102.8 MB in the beginning and 144.7 MB in the end (delta: 41.9 MB). Free memory was 70.4 MB in the beginning and 120.4 MB in the end (delta: -50.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.14 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 118.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.23 ms. Allocated memory is still 144.7 MB. Free memory was 118.3 MB in the beginning and 117.6 MB in the end (delta: 676.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 553.62 ms. Allocated memory is still 144.7 MB. Free memory was 117.6 MB in the beginning and 102.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11329.92 ms. Allocated memory was 144.7 MB in the beginning and 178.3 MB in the end (delta: 33.6 MB). Free memory was 102.9 MB in the beginning and 95.5 MB in the end (delta: 7.4 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. * Witness Printer took 160.61 ms. Allocated memory is still 178.3 MB. Free memory was 95.5 MB in the beginning and 87.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 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: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) [L13] COND FALSE !(!cond) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L18] reach_error() VAL [counter=21] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 11.0s, OverallIterations: 8, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 51 SDslu, 176 SDs, 0 SdLazy, 137 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, InterpolantAutomatonStates: 90, 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, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 188 NumberOfCodeBlocks, 188 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 181 ConstructedInterpolants, 2 QuantifiedInterpolants, 560 SizeOfPredicates, 35 NumberOfNonLiveVariables, 492 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/468 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! [2021-10-29 05:56:02,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1cb125c-af42-4d28-a4bf-be278149b0a3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...