./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca_true-valid-memsafety_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/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 8df11a05aa3b89e8b7aa4c528df2e0718843a0ef .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 09:34:56,510 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 09:34:56,511 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 09:34:56,516 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 09:34:56,517 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 09:34:56,517 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 09:34:56,518 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 09:34:56,519 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 09:34:56,519 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 09:34:56,520 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 09:34:56,520 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 09:34:56,521 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 09:34:56,521 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 09:34:56,521 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 09:34:56,522 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 09:34:56,522 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 09:34:56,523 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 09:34:56,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 09:34:56,525 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 09:34:56,525 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 09:34:56,526 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 09:34:56,527 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 09:34:56,528 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 09:34:56,528 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 09:34:56,528 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 09:34:56,529 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 09:34:56,529 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 09:34:56,529 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 09:34:56,530 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 09:34:56,530 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 09:34:56,531 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 09:34:56,531 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 09:34:56,531 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 09:34:56,531 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 09:34:56,532 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 09:34:56,532 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 09:34:56,532 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-02 09:34:56,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 09:34:56,540 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 09:34:56,540 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 09:34:56,540 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 09:34:56,540 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 09:34:56,540 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 09:34:56,540 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 09:34:56,541 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 09:34:56,541 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 09:34:56,542 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-02 09:34:56,542 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 09:34:56,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 09:34:56,543 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 09:34:56,543 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 09:34:56,544 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/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 -> 8df11a05aa3b89e8b7aa4c528df2e0718843a0ef [2018-12-02 09:34:56,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 09:34:56,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 09:34:56,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 09:34:56,571 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 09:34:56,571 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 09:34:56,572 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca_true-valid-memsafety_true-termination.i [2018-12-02 09:34:56,607 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/data/acc5bb5cf/65e41774991b4bcf9dd6d1176f746295/FLAG3e556cb7a [2018-12-02 09:34:56,966 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 09:34:56,966 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca_true-valid-memsafety_true-termination.i [2018-12-02 09:34:56,973 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/data/acc5bb5cf/65e41774991b4bcf9dd6d1176f746295/FLAG3e556cb7a [2018-12-02 09:34:57,337 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/data/acc5bb5cf/65e41774991b4bcf9dd6d1176f746295 [2018-12-02 09:34:57,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 09:34:57,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 09:34:57,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 09:34:57,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 09:34:57,345 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 09:34:57,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8ed641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57, skipping insertion in model container [2018-12-02 09:34:57,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 09:34:57,372 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 09:34:57,520 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 09:34:57,526 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 09:34:57,580 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 09:34:57,606 INFO L195 MainTranslator]: Completed translation [2018-12-02 09:34:57,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57 WrapperNode [2018-12-02 09:34:57,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 09:34:57,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 09:34:57,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 09:34:57,607 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 09:34:57,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 09:34:57,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 09:34:57,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 09:34:57,626 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 09:34:57,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... [2018-12-02 09:34:57,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 09:34:57,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 09:34:57,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 09:34:57,641 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 09:34:57,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/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 [2018-12-02 09:34:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 09:34:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 09:34:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure cmemset [2018-12-02 09:34:57,673 INFO L138 BoogieDeclarations]: Found implementation of procedure cmemset [2018-12-02 09:34:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 09:34:57,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 09:34:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 09:34:57,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 09:34:57,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 09:34:57,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 09:34:57,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 09:34:57,811 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 09:34:57,811 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 09:34:57,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:34:57 BoogieIcfgContainer [2018-12-02 09:34:57,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 09:34:57,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 09:34:57,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 09:34:57,815 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 09:34:57,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 09:34:57" (1/3) ... [2018-12-02 09:34:57,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b338400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 09:34:57, skipping insertion in model container [2018-12-02 09:34:57,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:34:57" (2/3) ... [2018-12-02 09:34:57,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b338400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 09:34:57, skipping insertion in model container [2018-12-02 09:34:57,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:34:57" (3/3) ... [2018-12-02 09:34:57,817 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca_true-valid-memsafety_true-termination.i [2018-12-02 09:34:57,826 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 09:34:57,831 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-02 09:34:57,845 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-02 09:34:57,865 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 09:34:57,866 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-02 09:34:57,866 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 09:34:57,866 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 09:34:57,866 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 09:34:57,866 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 09:34:57,866 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 09:34:57,866 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 09:34:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-12-02 09:34:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 09:34:57,881 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 09:34:57,881 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 09:34:57,883 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, cmemsetErr1REQUIRES_VIOLATION, cmemsetErr0REQUIRES_VIOLATION]=== [2018-12-02 09:34:57,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 09:34:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1540839363, now seen corresponding path program 1 times [2018-12-02 09:34:57,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 09:34:57,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:57,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 09:34:57,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:57,922 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 09:34:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 09:34:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:58,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 09:34:58,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 09:34:58,024 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 09:34:58,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 09:34:58,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 09:34:58,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 09:34:58,036 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2018-12-02 09:34:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 09:34:58,137 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-02 09:34:58,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 09:34:58,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-12-02 09:34:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 09:34:58,145 INFO L225 Difference]: With dead ends: 30 [2018-12-02 09:34:58,145 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 09:34:58,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-02 09:34:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 09:34:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-12-02 09:34:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 09:34:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-12-02 09:34:58,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2018-12-02 09:34:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 09:34:58,167 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-12-02 09:34:58,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 09:34:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-12-02 09:34:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 09:34:58,168 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 09:34:58,168 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 09:34:58,168 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, cmemsetErr1REQUIRES_VIOLATION, cmemsetErr0REQUIRES_VIOLATION]=== [2018-12-02 09:34:58,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 09:34:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1540839364, now seen corresponding path program 1 times [2018-12-02 09:34:58,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 09:34:58,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:58,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 09:34:58,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:58,169 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 09:34:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 09:34:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:58,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 09:34:58,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 09:34:58,241 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 09:34:58,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 09:34:58,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 09:34:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-02 09:34:58,242 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2018-12-02 09:34:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 09:34:58,307 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-12-02 09:34:58,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 09:34:58,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-12-02 09:34:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 09:34:58,308 INFO L225 Difference]: With dead ends: 27 [2018-12-02 09:34:58,308 INFO L226 Difference]: Without dead ends: 27 [2018-12-02 09:34:58,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-12-02 09:34:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-02 09:34:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-12-02 09:34:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 09:34:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-12-02 09:34:58,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 14 [2018-12-02 09:34:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 09:34:58,311 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-12-02 09:34:58,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 09:34:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-12-02 09:34:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 09:34:58,311 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 09:34:58,311 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 09:34:58,312 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, cmemsetErr1REQUIRES_VIOLATION, cmemsetErr0REQUIRES_VIOLATION]=== [2018-12-02 09:34:58,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 09:34:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash -875230173, now seen corresponding path program 1 times [2018-12-02 09:34:58,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 09:34:58,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:58,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 09:34:58,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:58,313 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 09:34:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 09:34:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:58,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 09:34:58,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 09:34:58,351 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 09:34:58,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 09:34:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 09:34:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 09:34:58,352 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2018-12-02 09:34:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 09:34:58,372 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-12-02 09:34:58,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 09:34:58,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-12-02 09:34:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 09:34:58,373 INFO L225 Difference]: With dead ends: 25 [2018-12-02 09:34:58,373 INFO L226 Difference]: Without dead ends: 20 [2018-12-02 09:34:58,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 09:34:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-02 09:34:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-02 09:34:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-02 09:34:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-12-02 09:34:58,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-12-02 09:34:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 09:34:58,375 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-12-02 09:34:58,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 09:34:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-12-02 09:34:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 09:34:58,376 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 09:34:58,376 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 09:34:58,376 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, cmemsetErr1REQUIRES_VIOLATION, cmemsetErr0REQUIRES_VIOLATION]=== [2018-12-02 09:34:58,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 09:34:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash 891505576, now seen corresponding path program 1 times [2018-12-02 09:34:58,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 09:34:58,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:58,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 09:34:58,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:58,377 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 09:34:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 09:34:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:58,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 09:34:58,539 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 09:34:58,539 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-02 09:34:58,541 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [16], [18], [23], [26], [30], [31], [33], [34], [36], [41], [50], [51], [52], [54] [2018-12-02 09:34:58,566 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 09:34:58,566 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 09:34:58,672 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 09:34:58,673 INFO L272 AbstractInterpreter]: Visited 18 different actions 23 times. Merged at 5 different actions 5 times. Never widened. Performed 168 root evaluator evaluations with a maximum evaluation depth of 4. Performed 168 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 23 variables. [2018-12-02 09:34:58,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 09:34:58,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 09:34:58,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 09:34:58,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 09:34:58,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 09:34:58,685 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 09:34:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 09:34:58,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 09:34:58,732 INFO L478 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 [2018-12-02 09:34:58,733 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 09:34:58,737 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 09:34:58,737 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-02 09:34:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:58,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 09:34:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:59,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 09:34:59,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2018-12-02 09:34:59,192 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 09:34:59,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-02 09:34:59,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-02 09:34:59,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2018-12-02 09:34:59,193 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 21 states. [2018-12-02 09:34:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 09:34:59,491 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-12-02 09:34:59,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 09:34:59,491 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2018-12-02 09:34:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 09:34:59,492 INFO L225 Difference]: With dead ends: 26 [2018-12-02 09:34:59,492 INFO L226 Difference]: Without dead ends: 26 [2018-12-02 09:34:59,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2018-12-02 09:34:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-02 09:34:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-02 09:34:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-02 09:34:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-02 09:34:59,494 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2018-12-02 09:34:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 09:34:59,495 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-02 09:34:59,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-02 09:34:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-12-02 09:34:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-02 09:34:59,496 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 09:34:59,496 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 09:34:59,496 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, cmemsetErr1REQUIRES_VIOLATION, cmemsetErr0REQUIRES_VIOLATION]=== [2018-12-02 09:34:59,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 09:34:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1587009980, now seen corresponding path program 2 times [2018-12-02 09:34:59,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 09:34:59,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:59,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 09:34:59,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 09:34:59,505 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 09:34:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 09:34:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:59,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 09:34:59,668 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 09:34:59,668 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 09:34:59,668 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 09:34:59,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 09:34:59,668 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 09:34:59,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 09:34:59,674 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 09:34:59,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 09:34:59,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 09:34:59,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 09:34:59,695 INFO L478 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 [2018-12-02 09:34:59,696 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-02 09:34:59,698 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-02 09:34:59,698 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-02 09:34:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:34:59,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 09:35:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 09:35:00,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 09:35:00,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2018-12-02 09:35:00,170 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 09:35:00,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-02 09:35:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-02 09:35:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2018-12-02 09:35:00,171 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 21 states. [2018-12-02 09:35:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 09:35:00,677 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-12-02 09:35:00,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 09:35:00,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2018-12-02 09:35:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 09:35:00,678 INFO L225 Difference]: With dead ends: 30 [2018-12-02 09:35:00,678 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 09:35:00,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2018-12-02 09:35:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 09:35:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 09:35:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 09:35:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 09:35:00,679 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-12-02 09:35:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 09:35:00,680 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 09:35:00,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-02 09:35:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 09:35:00,680 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 09:35:00,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 09:35:00 BoogieIcfgContainer [2018-12-02 09:35:00,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 09:35:00,683 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 09:35:00,683 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 09:35:00,683 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 09:35:00,683 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:34:57" (3/4) ... [2018-12-02 09:35:00,685 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 09:35:00,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 09:35:00,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 09:35:00,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cmemset [2018-12-02 09:35:00,691 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-12-02 09:35:00,691 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-02 09:35:00,691 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 09:35:00,716 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1eebeb94-8c4b-4197-ae49-3cb45f4ba3c1/bin-2019/utaipan/witness.graphml [2018-12-02 09:35:00,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 09:35:00,717 INFO L168 Benchmark]: Toolchain (without parser) took 3376.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.9 MB). Free memory was 947.0 MB in the beginning and 906.4 MB in the end (delta: 40.7 MB). Peak memory consumption was 242.5 MB. Max. memory is 11.5 GB. [2018-12-02 09:35:00,717 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 09:35:00,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -156.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-12-02 09:35:00,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.69 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 09:35:00,718 INFO L168 Benchmark]: Boogie Preprocessor took 15.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-12-02 09:35:00,718 INFO L168 Benchmark]: RCFGBuilder took 170.49 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-02 09:35:00,718 INFO L168 Benchmark]: TraceAbstraction took 2870.55 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.8 MB). Free memory was 1.1 GB in the beginning and 914.3 MB in the end (delta: 167.6 MB). Peak memory consumption was 250.4 MB. Max. memory is 11.5 GB. [2018-12-02 09:35:00,719 INFO L168 Benchmark]: Witness Printer took 33.43 ms. Allocated memory is still 1.2 GB. Free memory is still 906.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 09:35:00,721 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 264.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -156.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.69 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.20 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 170.49 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2870.55 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.8 MB). Free memory was 1.1 GB in the beginning and 914.3 MB in the end (delta: 167.6 MB). Peak memory consumption was 250.4 MB. Max. memory is 11.5 GB. * Witness Printer took 33.43 ms. Allocated memory is still 1.2 GB. Free memory is still 906.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 551]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 3 error locations. SAFE Result, 2.8s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 135 SDslu, 507 SDs, 0 SdLazy, 465 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 165 ConstructedInterpolants, 2 QuantifiedInterpolants, 32569 SizeOfPredicates, 24 NumberOfNonLiveVariables, 229 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...