./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/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 10bdb405bd6bca2bddb8b686c44dad291e109402 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:08:46,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:08:46,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:08:46,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:08:46,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:08:46,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:08:46,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:08:46,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:08:46,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:08:46,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:08:46,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:08:46,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:08:46,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:08:46,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:08:46,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:08:46,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:08:46,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:08:46,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:08:46,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:08:46,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:08:46,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:08:46,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:08:46,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:08:46,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:08:46,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:08:46,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:08:46,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:08:46,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:08:46,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:08:46,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:08:46,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:08:46,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:08:46,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:08:46,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:08:46,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:08:46,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:08:46,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:08:46,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:08:46,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:08:46,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:08:46,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:08:46,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:08:47,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:08:47,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:08:47,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:08:47,029 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:08:47,029 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:08:47,030 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:08:47,030 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:08:47,030 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:08:47,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:08:47,031 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:08:47,032 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:08:47,032 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:08:47,033 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:08:47,033 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:08:47,033 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:08:47,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:08:47,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:08:47,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:08:47,035 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:08:47,035 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:08:47,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:08:47,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:08:47,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:08:47,036 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:08:47,036 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:08:47,036 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:08:47,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:08:47,039 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:08:47,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:08:47,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:08:47,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:08:47,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:08:47,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:08:47,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:08:47,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:08:47,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:08:47,041 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:08:47,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:08:47,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:08:47,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:08:47,042 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_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10bdb405bd6bca2bddb8b686c44dad291e109402 [2020-11-22 13:08:47,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:08:47,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:08:47,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:08:47,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:08:47,358 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:08:47,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-11-22 13:08:47,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/data/2e3a555d4/cca5c9b3f9064e3da354064176312ae9/FLAG049b99bb3 [2020-11-22 13:08:48,036 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:08:48,036 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-11-22 13:08:48,053 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/data/2e3a555d4/cca5c9b3f9064e3da354064176312ae9/FLAG049b99bb3 [2020-11-22 13:08:48,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/data/2e3a555d4/cca5c9b3f9064e3da354064176312ae9 [2020-11-22 13:08:48,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:08:48,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:08:48,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:08:48,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:08:48,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:08:48,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba02036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48, skipping insertion in model container [2020-11-22 13:08:48,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:08:48,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:08:48,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:08:48,732 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:08:48,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:08:48,858 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:08:48,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48 WrapperNode [2020-11-22 13:08:48,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:08:48,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:08:48,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:08:48,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:08:48,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:08:48,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:08:48,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:08:48,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:08:48,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... [2020-11-22 13:08:48,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:08:48,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:08:48,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:08:48,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:08:48,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/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 [2020-11-22 13:08:49,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:08:49,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:08:49,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:08:49,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:08:49,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:08:49,537 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:08:49,537 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:08:49,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:49 BoogieIcfgContainer [2020-11-22 13:08:49,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:08:49,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:08:49,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:08:49,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:08:49,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:08:48" (1/3) ... [2020-11-22 13:08:49,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a9e6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:49, skipping insertion in model container [2020-11-22 13:08:49,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:08:48" (2/3) ... [2020-11-22 13:08:49,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a9e6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:49, skipping insertion in model container [2020-11-22 13:08:49,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:49" (3/3) ... [2020-11-22 13:08:49,551 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2020-11-22 13:08:49,563 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:08:49,568 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-22 13:08:49,580 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 13:08:49,612 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:08:49,612 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:08:49,612 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:08:49,612 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:08:49,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:08:49,613 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:08:49,613 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:08:49,613 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:08:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-22 13:08:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:08:49,635 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:49,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:08:49,636 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2609821, now seen corresponding path program 1 times [2020-11-22 13:08:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:49,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079109203] [2020-11-22 13:08:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079109203] [2020-11-22 13:08:49,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:49,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:08:49,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116476485] [2020-11-22 13:08:49,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:08:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:08:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:08:49,921 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2020-11-22 13:08:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:50,043 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-22 13:08:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:08:50,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 13:08:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:50,061 INFO L225 Difference]: With dead ends: 11 [2020-11-22 13:08:50,062 INFO L226 Difference]: Without dead ends: 10 [2020-11-22 13:08:50,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:08:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-22 13:08:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-11-22 13:08:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-22 13:08:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-22 13:08:50,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2020-11-22 13:08:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:50,101 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-22 13:08:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:08:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-22 13:08:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:08:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:50,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:08:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:08:50,103 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2609822, now seen corresponding path program 1 times [2020-11-22 13:08:50,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:50,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402512483] [2020-11-22 13:08:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:50,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402512483] [2020-11-22 13:08:50,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:50,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:08:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421915430] [2020-11-22 13:08:50,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:08:50,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:08:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:08:50,294 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-11-22 13:08:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:50,392 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-22 13:08:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:08:50,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 13:08:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:50,394 INFO L225 Difference]: With dead ends: 11 [2020-11-22 13:08:50,394 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 13:08:50,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:08:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 13:08:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 13:08:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 13:08:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-22 13:08:50,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2020-11-22 13:08:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:50,398 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-22 13:08:50,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:08:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-22 13:08:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:08:50,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:50,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:08:50,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:08:50,400 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:50,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2629898, now seen corresponding path program 1 times [2020-11-22 13:08:50,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:50,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25537116] [2020-11-22 13:08:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25537116] [2020-11-22 13:08:50,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:50,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:08:50,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514597505] [2020-11-22 13:08:50,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:08:50,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:50,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:08:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:08:50,522 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-11-22 13:08:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:50,535 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-11-22 13:08:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:08:50,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 13:08:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:50,537 INFO L225 Difference]: With dead ends: 11 [2020-11-22 13:08:50,537 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 13:08:50,538 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 [2020-11-22 13:08:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 13:08:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 13:08:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 13:08:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-22 13:08:50,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-11-22 13:08:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:50,551 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-22 13:08:50,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:08:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-22 13:08:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:08:50,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:50,552 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-22 13:08:50,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:08:50,553 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash 440602860, now seen corresponding path program 1 times [2020-11-22 13:08:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:50,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244776586] [2020-11-22 13:08:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:50,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244776586] [2020-11-22 13:08:50,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012610235] [2020-11-22 13:08:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/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 [2020-11-22 13:08:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-22 13:08:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:50,990 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-22 13:08:50,990 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:08:51,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:08:51,003 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:08:51,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-22 13:08:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:51,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:51,598 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-11-22 13:08:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:51,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082905316] [2020-11-22 13:08:51,732 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:08:51,732 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:08:51,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:08:51,742 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:08:51,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:08:52,732 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:08:53,077 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-22 13:08:53,328 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-22 13:08:53,695 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2020-11-22 13:08:54,013 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-22 13:08:54,110 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:08:54,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:08:54,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2020-11-22 13:08:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684217727] [2020-11-22 13:08:54,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-22 13:08:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-22 13:08:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-11-22 13:08:54,113 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2020-11-22 13:08:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:54,284 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-22 13:08:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:08:54,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 7 [2020-11-22 13:08:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:54,285 INFO L225 Difference]: With dead ends: 14 [2020-11-22 13:08:54,285 INFO L226 Difference]: Without dead ends: 14 [2020-11-22 13:08:54,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-11-22 13:08:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-22 13:08:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-22 13:08:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-22 13:08:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-22 13:08:54,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2020-11-22 13:08:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:54,290 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-22 13:08:54,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-22 13:08:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-22 13:08:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:08:54,290 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:54,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:08:54,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-11-22 13:08:54,491 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash 440601794, now seen corresponding path program 1 times [2020-11-22 13:08:54,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:54,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416222810] [2020-11-22 13:08:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:54,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416222810] [2020-11-22 13:08:54,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:54,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:08:54,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516360270] [2020-11-22 13:08:54,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:08:54,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:54,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:08:54,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:54,571 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-11-22 13:08:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:54,584 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-22 13:08:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:08:54,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:08:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:54,586 INFO L225 Difference]: With dead ends: 13 [2020-11-22 13:08:54,586 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 13:08:54,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:08:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 13:08:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 13:08:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 13:08:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-22 13:08:54,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-11-22 13:08:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:54,588 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-22 13:08:54,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:08:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-22 13:08:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:08:54,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:54,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-11-22 13:08:54,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-22 13:08:54,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:54,590 INFO L82 PathProgramCache]: Analyzing trace with hash 580552670, now seen corresponding path program 2 times [2020-11-22 13:08:54,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:54,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033268272] [2020-11-22 13:08:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:54,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033268272] [2020-11-22 13:08:54,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064084696] [2020-11-22 13:08:54,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/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 [2020-11-22 13:08:54,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-22 13:08:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:08:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-22 13:08:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:55,096 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-11-22 13:08:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:55,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070937256] [2020-11-22 13:08:55,946 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:08:55,946 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:08:55,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:08:55,947 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:08:55,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:08:56,349 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:08:56,655 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-22 13:08:56,985 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-11-22 13:08:57,202 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-22 13:08:57,296 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:08:57,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:08:57,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2020-11-22 13:08:57,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922213795] [2020-11-22 13:08:57,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-22 13:08:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:08:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-22 13:08:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2020-11-22 13:08:57,299 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 26 states. [2020-11-22 13:08:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:58,096 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-22 13:08:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-22 13:08:58,097 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 10 [2020-11-22 13:08:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:58,097 INFO L225 Difference]: With dead ends: 20 [2020-11-22 13:08:58,098 INFO L226 Difference]: Without dead ends: 20 [2020-11-22 13:08:58,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-11-22 13:08:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-22 13:08:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-22 13:08:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-22 13:08:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-22 13:08:58,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-11-22 13:08:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:58,102 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-22 13:08:58,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-22 13:08:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-22 13:08:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 13:08:58,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:58,103 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2020-11-22 13:08:58,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-22 13:08:58,304 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-11-22 13:08:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1511687788, now seen corresponding path program 3 times [2020-11-22 13:08:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:08:58,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295010743] [2020-11-22 13:08:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:08:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:58,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295010743] [2020-11-22 13:08:58,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961384242] [2020-11-22 13:08:58,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/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 [2020-11-22 13:08:58,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 13:08:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:08:58,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 75 conjunts are in the unsatisfiable core [2020-11-22 13:08:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:59,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:09:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:09:00,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9436206] [2020-11-22 13:09:00,571 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:09:00,571 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:09:00,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:09:00,572 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:09:00,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:09:01,012 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:09:01,289 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-22 13:09:01,565 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-11-22 13:09:01,861 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-22 13:09:01,957 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:09:01,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:09:01,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2020-11-22 13:09:01,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915751626] [2020-11-22 13:09:01,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-22 13:09:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:09:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-22 13:09:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2020-11-22 13:09:01,960 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 44 states. [2020-11-22 13:09:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:09:03,473 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-22 13:09:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-22 13:09:03,473 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 19 [2020-11-22 13:09:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:09:03,474 INFO L225 Difference]: With dead ends: 22 [2020-11-22 13:09:03,474 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:09:03,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=469, Invalid=4087, Unknown=0, NotChecked=0, Total=4556 [2020-11-22 13:09:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:09:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:09:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:09:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:09:03,476 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-22 13:09:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:09:03,476 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:09:03,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-22 13:09:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:09:03,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:09:03,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-22 13:09:03,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:09:03 BoogieIcfgContainer [2020-11-22 13:09:03,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:09:03,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:09:03,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:09:03,680 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:09:03,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:49" (3/4) ... [2020-11-22 13:09:03,683 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:09:03,690 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-22 13:09:03,690 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-22 13:09:03,691 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 13:09:03,723 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d2b6219a-8ac1-4808-a4b0-9b8c39fb4c88/bin/utaipan/witness.graphml [2020-11-22 13:09:03,723 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:09:03,724 INFO L168 Benchmark]: Toolchain (without parser) took 15383.40 ms. Allocated memory was 83.9 MB in the beginning and 146.8 MB in the end (delta: 62.9 MB). Free memory was 49.4 MB in the beginning and 85.1 MB in the end (delta: -35.7 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:09:03,725 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 83.9 MB. Free memory was 56.0 MB in the beginning and 55.9 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:09:03,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 515.84 ms. Allocated memory is still 83.9 MB. Free memory was 49.2 MB in the beginning and 51.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:09:03,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.58 ms. Allocated memory is still 83.9 MB. Free memory was 51.2 MB in the beginning and 49.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:09:03,726 INFO L168 Benchmark]: Boogie Preprocessor took 23.97 ms. Allocated memory is still 83.9 MB. Free memory was 49.4 MB in the beginning and 48.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:09:03,727 INFO L168 Benchmark]: RCFGBuilder took 606.50 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 48.1 MB in the beginning and 72.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:09:03,727 INFO L168 Benchmark]: TraceAbstraction took 14135.78 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 71.9 MB in the beginning and 87.2 MB in the end (delta: -15.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:09:03,728 INFO L168 Benchmark]: Witness Printer took 43.39 ms. Allocated memory is still 146.8 MB. Free memory was 87.2 MB in the beginning and 85.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:09:03,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 83.9 MB. Free memory was 56.0 MB in the beginning and 55.9 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 515.84 ms. Allocated memory is still 83.9 MB. Free memory was 49.2 MB in the beginning and 51.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.58 ms. Allocated memory is still 83.9 MB. Free memory was 51.2 MB in the beginning and 49.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.97 ms. Allocated memory is still 83.9 MB. Free memory was 49.4 MB in the beginning and 48.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 606.50 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 48.1 MB in the beginning and 72.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14135.78 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 71.9 MB in the beginning and 87.2 MB in the end (delta: -15.2 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. * Witness Printer took 43.39 ms. Allocated memory is still 146.8 MB. Free memory was 87.2 MB in the beginning and 85.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.0s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 27 SDslu, 50 SDs, 0 SdLazy, 685 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 27078 SizeOfPredicates, 38 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 15/147 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...