./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c --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_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/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 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:21:52,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:21:52,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:21:52,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:21:52,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:21:52,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:21:52,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:21:52,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:21:52,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:21:52,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:21:52,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:21:52,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:21:52,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:21:52,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:21:52,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:21:52,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:21:52,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:21:52,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:21:52,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:21:52,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:21:52,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:21:52,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:21:52,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:21:52,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:21:52,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:21:52,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:21:52,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:21:52,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:21:52,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:21:52,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:21:52,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:21:52,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:21:52,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:21:52,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:21:52,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:21:52,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:21:52,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:21:52,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:21:52,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:21:52,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:21:52,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:21:52,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:21:53,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:21:53,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:21:53,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:21:53,010 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:21:53,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:21:53,011 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:21:53,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:21:53,011 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:21:53,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:21:53,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:21:53,013 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:21:53,013 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:21:53,014 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:21:53,014 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:21:53,014 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:21:53,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:21:53,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:21:53,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:21:53,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:21:53,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:21:53,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:21:53,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:21:53,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:21:53,018 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:21:53,018 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:21:53,018 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:21:53,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:21:53,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:21:53,021 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:21:53,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:21:53,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:21:53,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:21:53,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:21:53,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:21:53,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:21:53,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:21:53,023 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:21:53,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:21:53,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:21:53,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:21:53,024 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_3c8d50bc-caea-4be9-937c-9a1689176c5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fe3d28a1849ecc88958d9d302f4fb4c5dbb992 [2020-11-28 07:21:53,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:21:53,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:21:53,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:21:53,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:21:53,491 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:21:53,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-28 07:21:53,578 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/data/1044b473c/677868bc299e4fc8ad8900dc19a58fa6/FLAG7839b19df [2020-11-28 07:21:54,115 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:21:54,116 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-11-28 07:21:54,130 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/data/1044b473c/677868bc299e4fc8ad8900dc19a58fa6/FLAG7839b19df [2020-11-28 07:21:54,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/data/1044b473c/677868bc299e4fc8ad8900dc19a58fa6 [2020-11-28 07:21:54,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:21:54,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:21:54,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:21:54,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:21:54,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:21:54,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4602e761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54, skipping insertion in model container [2020-11-28 07:21:54,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:21:54,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:21:54,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:21:54,792 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:21:54,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:21:54,841 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:21:54,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54 WrapperNode [2020-11-28 07:21:54,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:21:54,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:21:54,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:21:54,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:21:54,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:21:54,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:21:54,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:21:54,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:21:54,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... [2020-11-28 07:21:54,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:21:54,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:21:54,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:21:54,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:21:54,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/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 07:21:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:21:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:21:55,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:21:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:21:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:21:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:21:55,814 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:21:55,815 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:21:55,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:21:55 BoogieIcfgContainer [2020-11-28 07:21:55,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:21:55,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:21:55,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:21:55,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:21:55,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:21:54" (1/3) ... [2020-11-28 07:21:55,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edab2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:21:55, skipping insertion in model container [2020-11-28 07:21:55,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:21:54" (2/3) ... [2020-11-28 07:21:55,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edab2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:21:55, skipping insertion in model container [2020-11-28 07:21:55,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:21:55" (3/3) ... [2020-11-28 07:21:55,830 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2020-11-28 07:21:55,842 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:21:55,847 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 07:21:55,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 07:21:55,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:21:55,879 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:21:55,879 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:21:55,879 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:21:55,879 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:21:55,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:21:55,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:21:55,880 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:21:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-28 07:21:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:21:55,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:55,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:21:55,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:55,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash 3118125, now seen corresponding path program 1 times [2020-11-28 07:21:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:55,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138521831] [2020-11-28 07:21:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:56,117 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 07:21:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138521831] [2020-11-28 07:21:56,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:21:56,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:21:56,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878681560] [2020-11-28 07:21:56,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:21:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:56,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:21:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:21:56,151 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-28 07:21:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:56,231 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-28 07:21:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:21:56,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:21:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:56,247 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:21:56,247 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:21:56,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:21:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:21:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-28 07:21:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:21:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 07:21:56,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-28 07:21:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:56,295 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 07:21:56,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:21:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 07:21:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:21:56,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:56,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:21:56,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:21:56,298 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2020-11-28 07:21:56,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:56,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154736906] [2020-11-28 07:21:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:56,382 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 07:21:56,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154736906] [2020-11-28 07:21:56,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:21:56,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:21:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546295563] [2020-11-28 07:21:56,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:21:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:21:56,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:21:56,397 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-28 07:21:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:56,439 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-28 07:21:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:21:56,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:21:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:56,443 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:21:56,443 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 07:21:56,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:21:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 07:21:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-11-28 07:21:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:21:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 07:21:56,453 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-11-28 07:21:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:56,453 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 07:21:56,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:21:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 07:21:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:21:56,454 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:56,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:21:56,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:21:56,455 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 3050899, now seen corresponding path program 1 times [2020-11-28 07:21:56,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:56,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681149976] [2020-11-28 07:21:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:56,549 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 07:21:56,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681149976] [2020-11-28 07:21:56,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:21:56,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:21:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676175803] [2020-11-28 07:21:56,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:21:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:21:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:21:56,553 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-11-28 07:21:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:56,586 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-11-28 07:21:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:21:56,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:21:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:56,590 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:21:56,590 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:21:56,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 07:21:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:21:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-28 07:21:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:21:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-28 07:21:56,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2020-11-28 07:21:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:56,595 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-28 07:21:56,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:21:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-28 07:21:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:21:56,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:56,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:21:56,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:21:56,599 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 94514992, now seen corresponding path program 1 times [2020-11-28 07:21:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:56,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996012285] [2020-11-28 07:21:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:56,670 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 07:21:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996012285] [2020-11-28 07:21:56,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:21:56,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:21:56,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557682987] [2020-11-28 07:21:56,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:21:56,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:56,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:21:56,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:21:56,673 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-11-28 07:21:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:56,750 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-28 07:21:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:21:56,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:21:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:56,752 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:21:56,752 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:21:56,752 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 07:21:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:21:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 07:21:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:21:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-28 07:21:56,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2020-11-28 07:21:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:56,757 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-28 07:21:56,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:21:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-28 07:21:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:21:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:56,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:21:56,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:21:56,758 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash 94514993, now seen corresponding path program 1 times [2020-11-28 07:21:56,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:56,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476726679] [2020-11-28 07:21:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:56,856 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 07:21:56,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476726679] [2020-11-28 07:21:56,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:21:56,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:21:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226376963] [2020-11-28 07:21:56,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:21:56,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:21:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:21:56,859 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-11-28 07:21:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:56,949 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-28 07:21:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:21:56,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:21:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:56,951 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:21:56,951 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:21:56,952 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 07:21:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:21:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:21:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:21:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-28 07:21:56,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2020-11-28 07:21:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:56,956 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-28 07:21:56,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:21:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-28 07:21:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:21:56,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:56,957 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-28 07:21:56,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:21:56,957 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 634647528, now seen corresponding path program 1 times [2020-11-28 07:21:56,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:56,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721246552] [2020-11-28 07:21:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:57,029 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 07:21:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721246552] [2020-11-28 07:21:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814196481] [2020-11-28 07:21:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/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 07:21:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:21:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:21:57,127 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 07:21:57,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:21:57,167 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 07:21:57,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179652505] [2020-11-28 07:21:57,197 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:21:57,197 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:21:57,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:21:57,210 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:21:57,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:21:57,986 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 124 [2020-11-28 07:21:58,103 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:21:58,238 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-28 07:21:58,414 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-11-28 07:21:58,603 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-11-28 07:21:58,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:21:58,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2020-11-28 07:21:58,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847554999] [2020-11-28 07:21:58,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:21:58,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:21:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:21:58,632 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-11-28 07:21:58,889 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-11-28 07:21:59,162 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-11-28 07:21:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:59,286 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-28 07:21:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:21:59,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 07:21:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:59,287 INFO L225 Difference]: With dead ends: 30 [2020-11-28 07:21:59,287 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 07:21:59,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:21:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 07:21:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-11-28 07:21:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:21:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-11-28 07:21:59,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2020-11-28 07:21:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:59,293 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-11-28 07:21:59,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:21:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-28 07:21:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:21:59,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:59,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-28 07:21:59,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 07:21:59,494 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1800763058, now seen corresponding path program 1 times [2020-11-28 07:21:59,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:59,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303545009] [2020-11-28 07:21:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:21:59,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303545009] [2020-11-28 07:21:59,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:21:59,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:21:59,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808166929] [2020-11-28 07:21:59,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:21:59,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:21:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:21:59,597 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-11-28 07:21:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:59,705 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-28 07:21:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:21:59,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 07:21:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:59,708 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:21:59,708 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 07:21:59,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:21:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 07:21:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-11-28 07:21:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 07:21:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-28 07:21:59,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2020-11-28 07:21:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:59,712 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-28 07:21:59,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:21:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-28 07:21:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:21:59,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:59,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:21:59,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-28 07:21:59,720 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:21:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:21:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 400365424, now seen corresponding path program 1 times [2020-11-28 07:21:59,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:21:59,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902339565] [2020-11-28 07:21:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:21:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:59,787 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 07:21:59,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902339565] [2020-11-28 07:21:59,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435216525] [2020-11-28 07:21:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/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 07:21:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:21:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:21:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:21:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:21:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:21:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:21:59,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:21:59,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2020-11-28 07:21:59,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369945237] [2020-11-28 07:21:59,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:21:59,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:21:59,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:21:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:21:59,864 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-11-28 07:21:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:21:59,897 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-11-28 07:21:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:21:59,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-28 07:21:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:21:59,904 INFO L225 Difference]: With dead ends: 23 [2020-11-28 07:21:59,904 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 07:21:59,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:21:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 07:21:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-28 07:21:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 07:21:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 07:21:59,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-11-28 07:21:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:21:59,908 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 07:21:59,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:21:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 07:21:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:21:59,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:21:59,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:22:00,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:00,129 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:22:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash 400365425, now seen corresponding path program 1 times [2020-11-28 07:22:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:22:00,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045619600] [2020-11-28 07:22:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:22:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:00,177 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 07:22:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045619600] [2020-11-28 07:22:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35854078] [2020-11-28 07:22:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/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 07:22:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:22:00,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:00,292 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 07:22:00,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:00,336 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 07:22:00,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437387993] [2020-11-28 07:22:00,339 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:22:00,339 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:22:00,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:22:00,340 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:22:00,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:22:00,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:00,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:00,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:01,599 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:22:02,210 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-11-28 07:22:02,395 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-28 07:22:02,635 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-28 07:22:02,916 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-28 07:22:03,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:22:03,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 4, 4] total 13 [2020-11-28 07:22:03,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625925807] [2020-11-28 07:22:03,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:22:03,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:22:03,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:22:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:22:03,085 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-11-28 07:22:03,631 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-11-28 07:22:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:03,764 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-28 07:22:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:22:03,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-28 07:22:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:03,765 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:22:03,765 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:22:03,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:22:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:22:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-28 07:22:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:22:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 07:22:03,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2020-11-28 07:22:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:03,769 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 07:22:03,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:22:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 07:22:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:22:03,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:03,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:22:03,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-28 07:22:03,971 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:22:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1795882651, now seen corresponding path program 1 times [2020-11-28 07:22:03,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:22:03,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573525545] [2020-11-28 07:22:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:22:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:04,031 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 07:22:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573525545] [2020-11-28 07:22:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520299564] [2020-11-28 07:22:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:22:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:04,127 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 07:22:04,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:04,163 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 07:22:04,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66820360] [2020-11-28 07:22:04,166 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-28 07:22:04,166 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:22:04,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:22:04,166 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:22:04,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:22:04,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:04,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:04,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:05,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:05,573 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:22:06,047 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-11-28 07:22:06,242 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-28 07:22:06,418 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-28 07:22:06,661 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-28 07:22:06,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:22:06,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:22:06,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2020-11-28 07:22:06,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621957847] [2020-11-28 07:22:06,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:22:06,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:22:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:22:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:22:06,949 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-11-28 07:22:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:07,194 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-11-28 07:22:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 07:22:07,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-28 07:22:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:07,195 INFO L225 Difference]: With dead ends: 65 [2020-11-28 07:22:07,195 INFO L226 Difference]: Without dead ends: 65 [2020-11-28 07:22:07,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-28 07:22:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-28 07:22:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2020-11-28 07:22:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 07:22:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-11-28 07:22:07,204 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2020-11-28 07:22:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:07,205 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-11-28 07:22:07,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:22:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-11-28 07:22:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 07:22:07,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:07,206 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1] [2020-11-28 07:22:07,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:07,417 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:22:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash -982673158, now seen corresponding path program 1 times [2020-11-28 07:22:07,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:22:07,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747750065] [2020-11-28 07:22:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:22:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 07:22:07,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747750065] [2020-11-28 07:22:07,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789862604] [2020-11-28 07:22:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:22:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 07:22:07,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 07:22:07,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396068117] [2020-11-28 07:22:07,779 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:22:07,782 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:22:07,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:22:07,784 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:22:07,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:22:07,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:07,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:07,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:22:08,563 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:22:08,735 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-11-28 07:22:09,228 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-11-28 07:22:09,385 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-11-28 07:22:09,578 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-28 07:22:09,939 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-28 07:22:10,054 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:22:10,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:22:10,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2020-11-28 07:22:10,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904238856] [2020-11-28 07:22:10,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 07:22:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:22:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 07:22:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-28 07:22:10,056 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 17 states. [2020-11-28 07:22:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:10,123 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-11-28 07:22:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:22:10,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-11-28 07:22:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:10,127 INFO L225 Difference]: With dead ends: 79 [2020-11-28 07:22:10,127 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 07:22:10,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-28 07:22:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 07:22:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-28 07:22:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-28 07:22:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-11-28 07:22:10,134 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 31 [2020-11-28 07:22:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:10,134 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-11-28 07:22:10,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 07:22:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-11-28 07:22:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-28 07:22:10,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:10,136 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 2, 2, 1, 1, 1] [2020-11-28 07:22:10,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-28 07:22:10,365 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:22:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2066593926, now seen corresponding path program 2 times [2020-11-28 07:22:10,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:22:10,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662973288] [2020-11-28 07:22:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:22:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-11-28 07:22:10,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662973288] [2020-11-28 07:22:10,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411420791] [2020-11-28 07:22:10,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:10,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:22:10,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:22:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:22:10,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-28 07:22:10,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-28 07:22:11,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:22:11,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 3] total 19 [2020-11-28 07:22:11,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114724711] [2020-11-28 07:22:11,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:22:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:22:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:22:11,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:22:11,142 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 5 states. [2020-11-28 07:22:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:11,214 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-11-28 07:22:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:22:11,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-11-28 07:22:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:11,216 INFO L225 Difference]: With dead ends: 77 [2020-11-28 07:22:11,216 INFO L226 Difference]: Without dead ends: 77 [2020-11-28 07:22:11,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:22:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-28 07:22:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-28 07:22:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-28 07:22:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-11-28 07:22:11,222 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 67 [2020-11-28 07:22:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:11,222 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-11-28 07:22:11,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:22:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-11-28 07:22:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-28 07:22:11,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:22:11,224 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:22:11,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:11,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:22:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:22:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash -162298974, now seen corresponding path program 2 times [2020-11-28 07:22:11,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:22:11,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155338365] [2020-11-28 07:22:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:22:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:22:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 323 proven. 145 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-28 07:22:11,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155338365] [2020-11-28 07:22:11,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843697107] [2020-11-28 07:22:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:22:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:22:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:22:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:22:11,882 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-11-28 07:22:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2020-11-28 07:22:12,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:22:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2020-11-28 07:22:12,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:22:12,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [13] total 17 [2020-11-28 07:22:12,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477953084] [2020-11-28 07:22:12,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:22:12,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:22:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:22:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:22:12,189 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 6 states. [2020-11-28 07:22:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:22:12,329 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-11-28 07:22:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:22:12,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-11-28 07:22:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:22:12,330 INFO L225 Difference]: With dead ends: 76 [2020-11-28 07:22:12,330 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:22:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-11-28 07:22:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:22:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:22:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:22:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:22:12,331 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2020-11-28 07:22:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:22:12,331 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:22:12,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:22:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:22:12,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:22:12,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:22:12,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:22:12 BoogieIcfgContainer [2020-11-28 07:22:12,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:22:12,537 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:22:12,537 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:22:12,538 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:22:12,538 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:21:55" (3/4) ... [2020-11-28 07:22:12,542 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:22:12,553 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-28 07:22:12,553 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-28 07:22:12,554 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:22:12,592 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3c8d50bc-caea-4be9-937c-9a1689176c5e/bin/utaipan/witness.graphml [2020-11-28 07:22:12,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:22:12,593 INFO L168 Benchmark]: Toolchain (without parser) took 18122.43 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 67.9 MB in the beginning and 124.7 MB in the end (delta: -56.8 MB). Peak memory consumption was 54.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:12,593 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 71.3 MB. Free memory was 47.3 MB in the beginning and 47.3 MB in the end (delta: 23.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:12,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.26 ms. Allocated memory is still 100.7 MB. Free memory was 67.8 MB in the beginning and 78.4 MB in the end (delta: -10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:12,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.41 ms. Allocated memory is still 100.7 MB. Free memory was 78.4 MB in the beginning and 77.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:22:12,595 INFO L168 Benchmark]: Boogie Preprocessor took 28.61 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:12,595 INFO L168 Benchmark]: RCFGBuilder took 888.98 ms. Allocated memory is still 100.7 MB. Free memory was 75.9 MB in the beginning and 54.2 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:12,595 INFO L168 Benchmark]: TraceAbstraction took 16717.01 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 54.2 MB in the beginning and 127.4 MB in the end (delta: -73.2 MB). Peak memory consumption was 40.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:12,596 INFO L168 Benchmark]: Witness Printer took 55.14 ms. Allocated memory is still 211.8 MB. Free memory was 127.4 MB in the beginning and 124.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:22:12,598 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 71.3 MB. Free memory was 47.3 MB in the beginning and 47.3 MB in the end (delta: 23.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 368.26 ms. Allocated memory is still 100.7 MB. Free memory was 67.8 MB in the beginning and 78.4 MB in the end (delta: -10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.41 ms. Allocated memory is still 100.7 MB. Free memory was 78.4 MB in the beginning and 77.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.61 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 888.98 ms. Allocated memory is still 100.7 MB. Free memory was 75.9 MB in the beginning and 54.2 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16717.01 ms. Allocated memory was 100.7 MB in the beginning and 211.8 MB in the end (delta: 111.1 MB). Free memory was 54.2 MB in the beginning and 127.4 MB in the end (delta: -73.2 MB). Peak memory consumption was 40.4 MB. Max. memory is 16.1 GB. * Witness Printer took 55.14 ms. Allocated memory is still 211.8 MB. Free memory was 127.4 MB in the beginning and 124.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.6s, OverallIterations: 13, TraceHistogramMax: 20, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 137 SDtfs, 256 SDslu, 126 SDs, 0 SdLazy, 377 SolverSat, 63 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 540 GetRequests, 410 SyntacticMatches, 16 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 61 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 448 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 630 ConstructedInterpolants, 67 QuantifiedInterpolants, 492417 SizeOfPredicates, 11 NumberOfNonLiveVariables, 546 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 27 InterpolantComputations, 11 PerfectInterpolantSequences, 3328/4020 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]: 2167, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME[ms]: 963, 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: 45, TOOLS_QUANTIFIERELIM_TIME[ms]: 938, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 180, FLUID_QUERY_TIME[ms]: 6, FLUID_QUERIES: 84, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 462, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME[ms]: 566, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME[ms]: 47, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME[ms]: 50, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1668, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1668, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, 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]: 3, PATH_EXPR_TIME[ms]: 5, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 25, DAG_COMPRESSION_PROCESSED_NODES: 110, DAG_COMPRESSION_RETAINED_NODES: 51, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...