./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/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 0.2.0-7b2dab5 [2020-12-09 08:57:57,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:57:57,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:57:57,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:57:57,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:57:57,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:57:57,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:57:57,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:57:57,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:57:57,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:57:57,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:57:57,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:57:57,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:57:57,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:57:57,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:57:57,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:57:57,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:57:57,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:57:57,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:57:57,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:57:57,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:57:57,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:57:57,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:57:57,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:57:57,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:57:57,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:57:57,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:57:57,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:57:57,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:57:57,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:57:57,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:57:57,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:57:57,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:57:57,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:57:57,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:57:57,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:57:57,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:57:57,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:57:57,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:57:57,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:57:57,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:57:57,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 08:57:57,590 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:57:57,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:57:57,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:57:57,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:57:57,591 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:57:57,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:57:57,592 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:57:57,592 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:57:57,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 08:57:57,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 08:57:57,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 08:57:57,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:57:57,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:57:57,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:57:57,594 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:57:57,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:57:57,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:57:57,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:57:57,595 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_6da70559-eefa-4ba8-a798-2fef5b4cb549/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10bdb405bd6bca2bddb8b686c44dad291e109402 [2020-12-09 08:57:57,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:57:57,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:57:57,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:57:57,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:57:57,788 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:57:57,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-09 08:57:57,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/data/34f723ec3/1eb40236a9ad4d73a08699d62dd3f22b/FLAG3e316e8b9 [2020-12-09 08:57:58,236 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:57:58,236 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2020-12-09 08:57:58,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/data/34f723ec3/1eb40236a9ad4d73a08699d62dd3f22b/FLAG3e316e8b9 [2020-12-09 08:57:58,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/data/34f723ec3/1eb40236a9ad4d73a08699d62dd3f22b [2020-12-09 08:57:58,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:57:58,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:57:58,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:57:58,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:57:58,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:57:58,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e48da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58, skipping insertion in model container [2020-12-09 08:57:58,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:57:58,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:57:58,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:57:58,495 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:57:58,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:57:58,561 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:57:58,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58 WrapperNode [2020-12-09 08:57:58,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:57:58,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:57:58,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:57:58,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:57:58,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:57:58,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:57:58,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:57:58,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:57:58,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... [2020-12-09 08:57:58,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:57:58,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:57:58,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:57:58,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:57:58,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/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 [2020-12-09 08:57:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:57:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:57:58,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:57:58,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:57:58,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:57:58,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:57:58,910 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 08:57:58,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:57:58 BoogieIcfgContainer [2020-12-09 08:57:58,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:57:58,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:57:58,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:57:58,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:57:58,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:57:58" (1/3) ... [2020-12-09 08:57:58,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0739d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:57:58, skipping insertion in model container [2020-12-09 08:57:58,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:58" (2/3) ... [2020-12-09 08:57:58,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0739d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:57:58, skipping insertion in model container [2020-12-09 08:57:58,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:57:58" (3/3) ... [2020-12-09 08:57:58,921 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2020-12-09 08:57:58,934 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:57:58,937 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 08:57:58,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 08:57:58,964 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:57:58,964 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 08:57:58,964 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:57:58,965 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:57:58,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:57:58,965 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:57:58,965 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:57:58,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:57:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 08:57:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:57:58,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:57:58,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:57:58,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:57:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:57:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2609821, now seen corresponding path program 1 times [2020-12-09 08:57:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:57:58,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120762977] [2020-12-09 08:57:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:57:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:57:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:57:59,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120762977] [2020-12-09 08:57:59,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:57:59,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:57:59,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314022897] [2020-12-09 08:57:59,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:57:59,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:57:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:57:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:57:59,153 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2020-12-09 08:57:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:57:59,198 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-12-09 08:57:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:57:59,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 08:57:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:57:59,205 INFO L225 Difference]: With dead ends: 11 [2020-12-09 08:57:59,205 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 08:57:59,206 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 [2020-12-09 08:57:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 08:57:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-09 08:57:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 08:57:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-09 08:57:59,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2020-12-09 08:57:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:57:59,226 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-09 08:57:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:57:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-09 08:57:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:57:59,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:57:59,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:57:59,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:57:59,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:57:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:57:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2609822, now seen corresponding path program 1 times [2020-12-09 08:57:59,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:57:59,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332576218] [2020-12-09 08:57:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:57:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:57:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:57:59,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332576218] [2020-12-09 08:57:59,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:57:59,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 08:57:59,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904433122] [2020-12-09 08:57:59,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:57:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:57:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:57:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:57:59,307 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2020-12-09 08:57:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:57:59,349 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-09 08:57:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 08:57:59,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 08:57:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:57:59,350 INFO L225 Difference]: With dead ends: 14 [2020-12-09 08:57:59,350 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 08:57:59,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 08:57:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 08:57:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2020-12-09 08:57:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 08:57:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 08:57:59,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2020-12-09 08:57:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:57:59,354 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 08:57:59,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:57:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 08:57:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 08:57:59,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:57:59,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 08:57:59,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:57:59,354 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:57:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:57:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2629898, now seen corresponding path program 1 times [2020-12-09 08:57:59,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:57:59,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423503547] [2020-12-09 08:57:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:57:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:57:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:57:59,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423503547] [2020-12-09 08:57:59,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:57:59,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:57:59,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776731526] [2020-12-09 08:57:59,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:57:59,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:57:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:57:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:57:59,411 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2020-12-09 08:57:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:57:59,416 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-09 08:57:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:57:59,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 08:57:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:57:59,417 INFO L225 Difference]: With dead ends: 11 [2020-12-09 08:57:59,417 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 08:57:59,417 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 [2020-12-09 08:57:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 08:57:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 08:57:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 08:57:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 08:57:59,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-12-09 08:57:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:57:59,419 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 08:57:59,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:57:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 08:57:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:57:59,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:57:59,419 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 08:57:59,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 08:57:59,420 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:57:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:57:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash 440602860, now seen corresponding path program 1 times [2020-12-09 08:57:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:57:59,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767111174] [2020-12-09 08:57:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:57:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:57:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:57:59,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767111174] [2020-12-09 08:57:59,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605923520] [2020-12-09 08:57:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/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 [2020-12-09 08:57:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:57:59,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 08:57:59,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:57:59,633 INFO L382 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 [2020-12-09 08:57:59,634 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:57:59,639 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:57:59,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:57:59,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 08:57:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:57:59,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:57:59,908 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 08:57:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:57:59,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538940014] [2020-12-09 08:58:00,008 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 08:58:00,008 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:58:00,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:58:00,018 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:58:00,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:58:00,644 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:58:00,833 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-09 08:58:01,049 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-09 08:58:01,217 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-09 08:58:01,280 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:58:01,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:58:01,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2020-12-09 08:58:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215574316] [2020-12-09 08:58:01,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 08:58:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:58:01,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 08:58:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-12-09 08:58:01,284 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2020-12-09 08:58:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:58:01,451 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-12-09 08:58:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:58:01,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 7 [2020-12-09 08:58:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:58:01,452 INFO L225 Difference]: With dead ends: 14 [2020-12-09 08:58:01,452 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 08:58:01,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-12-09 08:58:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 08:58:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 08:58:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 08:58:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 08:58:01,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2020-12-09 08:58:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:58:01,455 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 08:58:01,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 08:58:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 08:58:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:58:01,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:58:01,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:58:01,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-12-09 08:58:01,657 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:58:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:58:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash 440601794, now seen corresponding path program 1 times [2020-12-09 08:58:01,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:58:01,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708796804] [2020-12-09 08:58:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:58:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:58:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:01,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708796804] [2020-12-09 08:58:01,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:58:01,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:58:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266926205] [2020-12-09 08:58:01,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:58:01,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:58:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:58:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:58:01,800 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-12-09 08:58:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:58:01,815 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-12-09 08:58:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:58:01,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:58:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:58:01,817 INFO L225 Difference]: With dead ends: 13 [2020-12-09 08:58:01,817 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 08:58:01,817 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 [2020-12-09 08:58:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 08:58:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 08:58:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 08:58:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 08:58:01,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-12-09 08:58:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:58:01,820 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 08:58:01,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:58:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 08:58:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:58:01,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:58:01,821 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2020-12-09 08:58:01,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-09 08:58:01,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:58:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:58:01,822 INFO L82 PathProgramCache]: Analyzing trace with hash 580552670, now seen corresponding path program 2 times [2020-12-09 08:58:01,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:58:01,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684949547] [2020-12-09 08:58:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:58:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:58:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:01,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684949547] [2020-12-09 08:58:01,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158925778] [2020-12-09 08:58:01,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/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 [2020-12-09 08:58:02,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 08:58:02,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:58:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-09 08:58:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:58:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:02,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:58:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:02,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153858394] [2020-12-09 08:58:02,481 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 08:58:02,481 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:58:02,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:58:02,482 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:58:02,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:58:02,753 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:58:02,920 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-09 08:58:03,089 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-09 08:58:03,234 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-09 08:58:03,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:58:03,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:58:03,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2020-12-09 08:58:03,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919813946] [2020-12-09 08:58:03,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-09 08:58:03,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:58:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-09 08:58:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-12-09 08:58:03,294 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 26 states. [2020-12-09 08:58:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:58:03,807 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-09 08:58:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 08:58:03,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 10 [2020-12-09 08:58:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:58:03,808 INFO L225 Difference]: With dead ends: 20 [2020-12-09 08:58:03,808 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 08:58:03,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 08:58:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 08:58:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 08:58:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 08:58:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-09 08:58:03,811 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2020-12-09 08:58:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:58:03,811 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-09 08:58:03,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-09 08:58:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-09 08:58:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 08:58:03,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:58:03,812 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2020-12-09 08:58:04,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:58:04,013 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 08:58:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:58:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1511687788, now seen corresponding path program 3 times [2020-12-09 08:58:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:58:04,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142441771] [2020-12-09 08:58:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:58:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:58:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:04,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142441771] [2020-12-09 08:58:04,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962116491] [2020-12-09 08:58:04,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/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 [2020-12-09 08:58:04,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 08:58:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:58:04,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-09 08:58:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:58:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:04,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:58:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:58:05,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423602296] [2020-12-09 08:58:05,273 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 08:58:05,273 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:58:05,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:58:05,274 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:58:05,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:58:05,620 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:58:05,799 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-09 08:58:06,241 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-09 08:58:06,431 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-12-09 08:58:06,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:58:06,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:58:06,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2020-12-09 08:58:06,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770968254] [2020-12-09 08:58:06,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-09 08:58:06,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:58:06,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-09 08:58:06,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 08:58:06,537 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 41 states. [2020-12-09 08:58:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:58:07,545 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-09 08:58:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 08:58:07,545 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 19 [2020-12-09 08:58:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:58:07,545 INFO L225 Difference]: With dead ends: 22 [2020-12-09 08:58:07,545 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 08:58:07,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=475, Invalid=3815, Unknown=0, NotChecked=0, Total=4290 [2020-12-09 08:58:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 08:58:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 08:58:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 08:58:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 08:58:07,547 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-12-09 08:58:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:58:07,548 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 08:58:07,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-09 08:58:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 08:58:07,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 08:58:07,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:58:07,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:58:07 BoogieIcfgContainer [2020-12-09 08:58:07,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:58:07,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:58:07,756 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:58:07,757 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:58:07,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:57:58" (3/4) ... [2020-12-09 08:58:07,759 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 08:58:07,767 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-09 08:58:07,767 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 08:58:07,767 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 08:58:07,793 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6da70559-eefa-4ba8-a798-2fef5b4cb549/bin/utaipan/witness.graphml [2020-12-09 08:58:07,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:58:07,795 INFO L168 Benchmark]: Toolchain (without parser) took 9534.73 ms. Allocated memory was 127.9 MB in the beginning and 186.6 MB in the end (delta: 58.7 MB). Free memory was 95.0 MB in the beginning and 78.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 73.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:58:07,795 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory is still 31.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:58:07,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.11 ms. Allocated memory is still 127.9 MB. Free memory was 95.0 MB in the beginning and 94.4 MB in the end (delta: 621.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:58:07,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.46 ms. Allocated memory is still 127.9 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:58:07,796 INFO L168 Benchmark]: Boogie Preprocessor took 16.30 ms. Allocated memory is still 127.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:58:07,796 INFO L168 Benchmark]: RCFGBuilder took 305.71 ms. Allocated memory is still 127.9 MB. Free memory was 91.6 MB in the beginning and 68.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:58:07,797 INFO L168 Benchmark]: TraceAbstraction took 8841.46 ms. Allocated memory was 127.9 MB in the beginning and 186.6 MB in the end (delta: 58.7 MB). Free memory was 68.6 MB in the beginning and 81.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:58:07,797 INFO L168 Benchmark]: Witness Printer took 37.45 ms. Allocated memory is still 186.6 MB. Free memory was 81.1 MB in the beginning and 78.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:58:07,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory is still 31.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.11 ms. Allocated memory is still 127.9 MB. Free memory was 95.0 MB in the beginning and 94.4 MB in the end (delta: 621.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.46 ms. Allocated memory is still 127.9 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.30 ms. Allocated memory is still 127.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 305.71 ms. Allocated memory is still 127.9 MB. Free memory was 91.6 MB in the beginning and 68.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8841.46 ms. Allocated memory was 127.9 MB in the beginning and 186.6 MB in the end (delta: 58.7 MB). Free memory was 68.6 MB in the beginning and 81.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. * Witness Printer took 37.45 ms. Allocated memory is still 186.6 MB. Free memory was 81.1 MB in the beginning and 78.5 MB in the end (delta: 2.6 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: 8.7s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 22 SDslu, 55 SDs, 0 SdLazy, 684 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 5.2s 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 26994 SizeOfPredicates, 39 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 161 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...