./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:41:44,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:44,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:44,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:44,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:44,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:44,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:44,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:44,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:44,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:44,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:44,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:44,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:44,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:44,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:44,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:44,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:44,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:44,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:44,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:44,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:44,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:44,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:44,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:44,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:44,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:44,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:44,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:44,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:44,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:44,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:44,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:44,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:44,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:44,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:44,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:44,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:44,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:44,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:44,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:44,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:44,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:41:44,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:44,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:44,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:44,885 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:44,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:44,886 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:44,886 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:44,886 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:44,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:44,887 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:44,888 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:44,888 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:44,889 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:44,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:44,889 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:44,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:41:44,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:41:44,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:44,891 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:44,891 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:41:44,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:44,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:44,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:44,892 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:41:44,892 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:41:44,892 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:41:44,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:44,895 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:44,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:44,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:44,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:44,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:44,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:44,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:44,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:44,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:44,897 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:44,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:44,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:44,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:44,898 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-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 [2020-11-28 07:41:45,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:45,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:45,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:45,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:45,219 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:45,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2020-11-28 07:41:45,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/data/05a20ea9a/9da0be63fddb4ee7a20e697f1ff2f6c7/FLAG606fbdff0 [2020-11-28 07:41:45,837 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:45,838 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2020-11-28 07:41:45,857 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/data/05a20ea9a/9da0be63fddb4ee7a20e697f1ff2f6c7/FLAG606fbdff0 [2020-11-28 07:41:46,144 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/data/05a20ea9a/9da0be63fddb4ee7a20e697f1ff2f6c7 [2020-11-28 07:41:46,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:46,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:46,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:46,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:46,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:46,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ed81d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46, skipping insertion in model container [2020-11-28 07:41:46,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:46,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:46,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:46,615 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:46,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:46,725 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:46,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46 WrapperNode [2020-11-28 07:41:46,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:46,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:46,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:46,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:46,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:46,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:46,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:46,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:46,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... [2020-11-28 07:41:46,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:46,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:46,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:46,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:46,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:41:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:41:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:41:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:41:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:46,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:47,770 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:47,770 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-28 07:41:47,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:47 BoogieIcfgContainer [2020-11-28 07:41:47,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:47,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:47,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:47,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:47,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:46" (1/3) ... [2020-11-28 07:41:47,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4714fcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:47, skipping insertion in model container [2020-11-28 07:41:47,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:46" (2/3) ... [2020-11-28 07:41:47,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4714fcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:47, skipping insertion in model container [2020-11-28 07:41:47,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:47" (3/3) ... [2020-11-28 07:41:47,785 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2020-11-28 07:41:47,803 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:47,809 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2020-11-28 07:41:47,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2020-11-28 07:41:47,846 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:47,846 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:41:47,846 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:47,846 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:47,846 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:47,847 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:47,847 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:47,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-11-28 07:41:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:41:47,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:47,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:41:47,870 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash 181214, now seen corresponding path program 1 times [2020-11-28 07:41:47,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:47,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129430177] [2020-11-28 07:41:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:48,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129430177] [2020-11-28 07:41:48,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:48,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:41:48,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375886488] [2020-11-28 07:41:48,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:48,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:48,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:48,075 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-11-28 07:41:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:48,176 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-11-28 07:41:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:48,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:41:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:48,189 INFO L225 Difference]: With dead ends: 50 [2020-11-28 07:41:48,189 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 07:41:48,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 07:41:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-28 07:41:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:41:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-11-28 07:41:48,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 3 [2020-11-28 07:41:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:48,248 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-11-28 07:41:48,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-11-28 07:41:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:41:48,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:48,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:41:48,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:48,250 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:48,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:48,254 INFO L82 PathProgramCache]: Analyzing trace with hash 181215, now seen corresponding path program 1 times [2020-11-28 07:41:48,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:48,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419702234] [2020-11-28 07:41:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:48,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419702234] [2020-11-28 07:41:48,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:48,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:48,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277866958] [2020-11-28 07:41:48,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:48,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:48,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:48,374 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 4 states. [2020-11-28 07:41:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:48,554 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-11-28 07:41:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:48,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:41:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:48,559 INFO L225 Difference]: With dead ends: 95 [2020-11-28 07:41:48,559 INFO L226 Difference]: Without dead ends: 95 [2020-11-28 07:41:48,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-28 07:41:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 53. [2020-11-28 07:41:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 07:41:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-11-28 07:41:48,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 3 [2020-11-28 07:41:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:48,569 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-11-28 07:41:48,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-11-28 07:41:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:41:48,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:48,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:41:48,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:48,570 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash 185719, now seen corresponding path program 1 times [2020-11-28 07:41:48,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:48,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827018398] [2020-11-28 07:41:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:48,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827018398] [2020-11-28 07:41:48,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:48,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:41:48,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712154343] [2020-11-28 07:41:48,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:48,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:48,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:48,654 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 3 states. [2020-11-28 07:41:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:48,707 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-28 07:41:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:48,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:41:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:48,709 INFO L225 Difference]: With dead ends: 51 [2020-11-28 07:41:48,709 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 07:41:48,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 07:41:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-28 07:41:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 07:41:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-11-28 07:41:48,716 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 3 [2020-11-28 07:41:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:48,716 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-11-28 07:41:48,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-11-28 07:41:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:41:48,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:48,717 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:41:48,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:48,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:48,718 INFO L82 PathProgramCache]: Analyzing trace with hash 174273092, now seen corresponding path program 1 times [2020-11-28 07:41:48,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:48,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635631486] [2020-11-28 07:41:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:48,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635631486] [2020-11-28 07:41:48,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661376333] [2020-11-28 07:41:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:41:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:48,969 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 07:41:48,970 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:41:48,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:41:48,978 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:41:48,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 07:41:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:49,090 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-28 07:41:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:49,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070279528] [2020-11-28 07:41:49,161 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:41:49,161 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:41:49,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:41:49,173 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:41:49,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:41:49,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:41:49,613 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:41:49,775 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-28 07:41:49,961 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:41:49,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:41:49,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-11-28 07:41:49,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128543768] [2020-11-28 07:41:49,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:41:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:41:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:41:49,964 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2020-11-28 07:41:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:50,332 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-11-28 07:41:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:41:50,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-11-28 07:41:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:50,335 INFO L225 Difference]: With dead ends: 131 [2020-11-28 07:41:50,335 INFO L226 Difference]: Without dead ends: 131 [2020-11-28 07:41:50,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-28 07:41:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-28 07:41:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 45. [2020-11-28 07:41:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 07:41:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-11-28 07:41:50,342 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 5 [2020-11-28 07:41:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:50,346 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-11-28 07:41:50,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:41:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-11-28 07:41:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:41:50,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:50,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:41:50,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-11-28 07:41:50,573 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1241849616, now seen corresponding path program 1 times [2020-11-28 07:41:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:50,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571591306] [2020-11-28 07:41:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:50,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571591306] [2020-11-28 07:41:50,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:50,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989301149] [2020-11-28 07:41:50,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:50,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:50,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:50,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:50,694 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-11-28 07:41:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:50,794 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-11-28 07:41:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:41:50,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-28 07:41:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:50,795 INFO L225 Difference]: With dead ends: 42 [2020-11-28 07:41:50,795 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 07:41:50,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 07:41:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 07:41:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 07:41:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-11-28 07:41:50,799 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2020-11-28 07:41:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:50,800 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-11-28 07:41:50,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-11-28 07:41:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:41:50,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:50,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:41:50,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-28 07:41:50,801 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1241849617, now seen corresponding path program 1 times [2020-11-28 07:41:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448182541] [2020-11-28 07:41:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:50,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448182541] [2020-11-28 07:41:50,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:50,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775139049] [2020-11-28 07:41:50,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:41:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:41:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:50,935 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 6 states. [2020-11-28 07:41:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:51,358 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2020-11-28 07:41:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:41:51,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:41:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:51,361 INFO L225 Difference]: With dead ends: 221 [2020-11-28 07:41:51,361 INFO L226 Difference]: Without dead ends: 221 [2020-11-28 07:41:51,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:41:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-28 07:41:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 63. [2020-11-28 07:41:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 07:41:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-11-28 07:41:51,381 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 6 [2020-11-28 07:41:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:51,383 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-11-28 07:41:51,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:41:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-11-28 07:41:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:41:51,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:51,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:51,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 07:41:51,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash -707536244, now seen corresponding path program 1 times [2020-11-28 07:41:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:51,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476465337] [2020-11-28 07:41:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:51,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476465337] [2020-11-28 07:41:51,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847553007] [2020-11-28 07:41:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-28 07:41:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:51,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:51,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601293411] [2020-11-28 07:41:51,940 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-28 07:41:51,940 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:41:51,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:41:51,941 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:41:51,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:41:52,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:41:52,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:41:53,864 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 159 [2020-11-28 07:41:53,890 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:41:54,261 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-11-28 07:41:54,439 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-11-28 07:41:54,902 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-11-28 07:41:57,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:41:57,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 19 [2020-11-28 07:41:57,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701786763] [2020-11-28 07:41:57,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:41:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:41:57,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-11-28 07:41:57,346 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 8 states. [2020-11-28 07:41:57,578 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-11-28 07:41:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:58,712 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2020-11-28 07:41:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:41:58,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-28 07:41:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:58,714 INFO L225 Difference]: With dead ends: 145 [2020-11-28 07:41:58,714 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:41:58,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:41:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:41:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 64. [2020-11-28 07:41:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 07:41:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2020-11-28 07:41:58,721 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 8 [2020-11-28 07:41:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:58,721 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2020-11-28 07:41:58,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:41:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2020-11-28 07:41:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:41:58,722 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:58,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:58,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-28 07:41:58,937 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash -906332610, now seen corresponding path program 1 times [2020-11-28 07:41:58,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:58,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9052101] [2020-11-28 07:41:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:59,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9052101] [2020-11-28 07:41:59,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:59,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:59,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863970075] [2020-11-28 07:41:59,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:59,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:59,019 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 5 states. [2020-11-28 07:41:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:59,099 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2020-11-28 07:41:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:41:59,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 07:41:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:59,104 INFO L225 Difference]: With dead ends: 78 [2020-11-28 07:41:59,104 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 07:41:59,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 07:41:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2020-11-28 07:41:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-28 07:41:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2020-11-28 07:41:59,114 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 9 [2020-11-28 07:41:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:59,114 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2020-11-28 07:41:59,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2020-11-28 07:41:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:41:59,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:59,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:59,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-28 07:41:59,115 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -906332609, now seen corresponding path program 1 times [2020-11-28 07:41:59,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:59,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160379317] [2020-11-28 07:41:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:59,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160379317] [2020-11-28 07:41:59,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:59,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:59,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809264559] [2020-11-28 07:41:59,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:59,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:59,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:59,204 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 5 states. [2020-11-28 07:41:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:59,312 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-11-28 07:41:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:41:59,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 07:41:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:59,313 INFO L225 Difference]: With dead ends: 100 [2020-11-28 07:41:59,313 INFO L226 Difference]: Without dead ends: 100 [2020-11-28 07:41:59,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-28 07:41:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-11-28 07:41:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-28 07:41:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2020-11-28 07:41:59,322 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 9 [2020-11-28 07:41:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:59,322 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2020-11-28 07:41:59,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2020-11-28 07:41:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:41:59,323 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:59,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:59,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-28 07:41:59,323 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:41:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:59,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1442833850, now seen corresponding path program 1 times [2020-11-28 07:41:59,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:59,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717762705] [2020-11-28 07:41:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:41:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717762705] [2020-11-28 07:41:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858672700] [2020-11-28 07:41:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-28 07:41:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:59,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:59,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370867323] [2020-11-28 07:41:59,928 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:41:59,928 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:41:59,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:41:59,929 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:41:59,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:42:00,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:42:00,677 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:42:01,210 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:42:01,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:42:01,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2020-11-28 07:42:01,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100580228] [2020-11-28 07:42:01,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 07:42:01,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 07:42:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:42:01,212 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand 16 states. [2020-11-28 07:42:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:02,915 INFO L93 Difference]: Finished difference Result 235 states and 273 transitions. [2020-11-28 07:42:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 07:42:02,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-11-28 07:42:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:02,918 INFO L225 Difference]: With dead ends: 235 [2020-11-28 07:42:02,918 INFO L226 Difference]: Without dead ends: 235 [2020-11-28 07:42:02,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2020-11-28 07:42:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-28 07:42:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 62. [2020-11-28 07:42:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 07:42:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2020-11-28 07:42:02,933 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 10 [2020-11-28 07:42:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:02,934 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2020-11-28 07:42:02,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 07:42:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2020-11-28 07:42:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:42:02,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:02,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:03,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-28 07:42:03,148 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-28 07:42:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1968376831, now seen corresponding path program 1 times [2020-11-28 07:42:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:03,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535120108] [2020-11-28 07:42:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:03,181 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:03,205 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:03,231 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:42:03,231 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:42:03,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-11-28 07:42:03,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:42:03 BoogieIcfgContainer [2020-11-28 07:42:03,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:42:03,284 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:42:03,284 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:42:03,284 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:42:03,285 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:47" (3/4) ... [2020-11-28 07:42:03,287 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:42:03,338 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f8ac65d1-c13c-463b-af60-daae9e9d9804/bin/utaipan/witness.graphml [2020-11-28 07:42:03,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:42:03,340 INFO L168 Benchmark]: Toolchain (without parser) took 17191.86 ms. Allocated memory was 94.4 MB in the beginning and 167.8 MB in the end (delta: 73.4 MB). Free memory was 61.9 MB in the beginning and 49.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 86.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,340 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 52.7 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:03,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 577.66 ms. Allocated memory is still 94.4 MB. Free memory was 61.7 MB in the beginning and 59.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,341 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.33 ms. Allocated memory is still 94.4 MB. Free memory was 59.6 MB in the beginning and 57.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,341 INFO L168 Benchmark]: Boogie Preprocessor took 63.00 ms. Allocated memory is still 94.4 MB. Free memory was 57.4 MB in the beginning and 56.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,341 INFO L168 Benchmark]: RCFGBuilder took 899.65 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 55.8 MB in the beginning and 76.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,342 INFO L168 Benchmark]: TraceAbstraction took 15508.60 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 76.3 MB in the beginning and 51.3 MB in the end (delta: 25.0 MB). Peak memory consumption was 77.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,342 INFO L168 Benchmark]: Witness Printer took 54.92 ms. Allocated memory is still 167.8 MB. Free memory was 51.3 MB in the beginning and 49.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:03,346 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 94.4 MB. Free memory was 52.8 MB in the beginning and 52.7 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 577.66 ms. Allocated memory is still 94.4 MB. Free memory was 61.7 MB in the beginning and 59.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.33 ms. Allocated memory is still 94.4 MB. Free memory was 59.6 MB in the beginning and 57.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.00 ms. Allocated memory is still 94.4 MB. Free memory was 57.4 MB in the beginning and 56.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 899.65 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 55.8 MB in the beginning and 76.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 29.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15508.60 ms. Allocated memory was 115.3 MB in the beginning and 167.8 MB in the end (delta: 52.4 MB). Free memory was 76.3 MB in the beginning and 51.3 MB in the end (delta: 25.0 MB). Peak memory consumption was 77.7 MB. Max. memory is 16.1 GB. * Witness Printer took 54.92 ms. Allocated memory is still 167.8 MB. Free memory was 51.3 MB in the beginning and 49.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L546] char* s1 = build_nondet_String(); [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L547] char* s2 = build_nondet_String(); [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 [L535] EXPR \read(*sc1) [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 27 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.3s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 1922 SDslu, 742 SDs, 0 SdLazy, 1330 SolverSat, 140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 586 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 6834 SizeOfPredicates, 36 NumberOfNonLiveVariables, 243 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 3/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 1950, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME[ms]: 1728, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 14, TOOLS_QUANTIFIERELIM_TIME[ms]: 1720, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 947, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 30, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 65, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 106, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 10, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 32, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 241, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 241, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 3, DAG_COMPRESSION_PROCESSED_NODES: 76, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...