./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-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_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/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 707f24c72c63346ec05641b1665aeeecec8225e6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 19:41:14,139 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 19:41:14,140 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 19:41:14,146 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 19:41:14,146 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 19:41:14,147 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 19:41:14,147 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 19:41:14,148 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 19:41:14,149 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 19:41:14,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 19:41:14,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 19:41:14,150 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 19:41:14,150 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 19:41:14,151 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 19:41:14,151 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 19:41:14,152 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 19:41:14,152 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 19:41:14,153 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 19:41:14,154 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 19:41:14,154 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 19:41:14,155 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 19:41:14,156 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 19:41:14,157 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 19:41:14,157 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 19:41:14,157 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 19:41:14,157 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 19:41:14,158 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 19:41:14,158 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 19:41:14,159 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 19:41:14,159 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 19:41:14,159 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 19:41:14,160 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 19:41:14,160 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 19:41:14,160 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 19:41:14,160 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 19:41:14,161 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 19:41:14,161 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 19:41:14,168 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 19:41:14,168 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 19:41:14,168 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 19:41:14,168 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 19:41:14,169 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 19:41:14,169 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 19:41:14,170 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 19:41:14,170 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 19:41:14,170 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 19:41:14,171 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 19:41:14,171 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 19:41:14,171 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 19:41:14,172 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 19:41:14,172 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_27612823-187b-4804-9493-73938c928a46/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 -> 707f24c72c63346ec05641b1665aeeecec8225e6 [2018-12-09 19:41:14,188 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 19:41:14,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 19:41:14,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 19:41:14,198 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 19:41:14,198 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 19:41:14,199 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-12-09 19:41:14,234 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/data/278428062/5ec14c91ee944e3bbc51c9714a877383/FLAG129036af2 [2018-12-09 19:41:14,690 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 19:41:14,690 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-12-09 19:41:14,696 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/data/278428062/5ec14c91ee944e3bbc51c9714a877383/FLAG129036af2 [2018-12-09 19:41:14,704 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/data/278428062/5ec14c91ee944e3bbc51c9714a877383 [2018-12-09 19:41:14,706 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 19:41:14,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 19:41:14,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 19:41:14,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 19:41:14,709 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 19:41:14,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c091ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14, skipping insertion in model container [2018-12-09 19:41:14,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 19:41:14,733 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 19:41:14,871 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:41:14,877 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 19:41:14,931 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 19:41:14,950 INFO L195 MainTranslator]: Completed translation [2018-12-09 19:41:14,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14 WrapperNode [2018-12-09 19:41:14,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 19:41:14,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 19:41:14,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 19:41:14,951 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 19:41:14,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 19:41:14,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 19:41:14,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 19:41:14,969 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 19:41:14,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... [2018-12-09 19:41:14,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 19:41:14,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 19:41:14,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 19:41:14,984 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 19:41:14,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/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 [2018-12-09 19:41:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 19:41:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 19:41:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure cmemrchr [2018-12-09 19:41:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure cmemrchr [2018-12-09 19:41:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 19:41:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 19:41:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 19:41:15,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 19:41:15,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 19:41:15,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 19:41:15,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 19:41:15,129 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 19:41:15,129 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 19:41:15,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:41:15 BoogieIcfgContainer [2018-12-09 19:41:15,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 19:41:15,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 19:41:15,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 19:41:15,132 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 19:41:15,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:41:14" (1/3) ... [2018-12-09 19:41:15,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fdcc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:41:15, skipping insertion in model container [2018-12-09 19:41:15,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:41:14" (2/3) ... [2018-12-09 19:41:15,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fdcc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:41:15, skipping insertion in model container [2018-12-09 19:41:15,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:41:15" (3/3) ... [2018-12-09 19:41:15,134 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-12-09 19:41:15,141 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 19:41:15,145 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-12-09 19:41:15,154 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-12-09 19:41:15,169 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 19:41:15,169 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 19:41:15,169 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 19:41:15,169 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 19:41:15,170 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 19:41:15,170 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 19:41:15,170 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 19:41:15,170 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 19:41:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-12-09 19:41:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 19:41:15,183 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:15,184 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:15,185 INFO L423 AbstractCegarLoop]: === Iteration 1 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:15,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:15,189 INFO L82 PathProgramCache]: Analyzing trace with hash 635677569, now seen corresponding path program 1 times [2018-12-09 19:41:15,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:15,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:15,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:15,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:41:15,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 19:41:15,329 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:41:15,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 19:41:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 19:41:15,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 19:41:15,342 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2018-12-09 19:41:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:15,423 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-09 19:41:15,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 19:41:15,424 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-12-09 19:41:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:15,433 INFO L225 Difference]: With dead ends: 30 [2018-12-09 19:41:15,433 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 19:41:15,435 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 [2018-12-09 19:41:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 19:41:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-12-09 19:41:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 19:41:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-09 19:41:15,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2018-12-09 19:41:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:15,458 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-09 19:41:15,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 19:41:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-09 19:41:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 19:41:15,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:15,459 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:15,459 INFO L423 AbstractCegarLoop]: === Iteration 2 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:15,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash 635677570, now seen corresponding path program 1 times [2018-12-09 19:41:15,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:15,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,460 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:15,560 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:41:15,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 19:41:15,560 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:41:15,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 19:41:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 19:41:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-09 19:41:15,561 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2018-12-09 19:41:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:15,677 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2018-12-09 19:41:15,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:41:15,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-12-09 19:41:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:15,678 INFO L225 Difference]: With dead ends: 47 [2018-12-09 19:41:15,678 INFO L226 Difference]: Without dead ends: 47 [2018-12-09 19:41:15,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-12-09 19:41:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-09 19:41:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2018-12-09 19:41:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-09 19:41:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2018-12-09 19:41:15,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 14 [2018-12-09 19:41:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:15,682 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2018-12-09 19:41:15,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 19:41:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2018-12-09 19:41:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 19:41:15,683 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:15,683 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:15,683 INFO L423 AbstractCegarLoop]: === Iteration 3 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:15,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1884282364, now seen corresponding path program 1 times [2018-12-09 19:41:15,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:15,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:15,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,684 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:15,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:41:15,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 19:41:15,769 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:41:15,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 19:41:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 19:41:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-12-09 19:41:15,769 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2018-12-09 19:41:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:15,862 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2018-12-09 19:41:15,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 19:41:15,862 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2018-12-09 19:41:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:15,863 INFO L225 Difference]: With dead ends: 50 [2018-12-09 19:41:15,863 INFO L226 Difference]: Without dead ends: 50 [2018-12-09 19:41:15,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-12-09 19:41:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-09 19:41:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2018-12-09 19:41:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 19:41:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-09 19:41:15,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2018-12-09 19:41:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:15,866 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-09 19:41:15,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 19:41:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-09 19:41:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:41:15,866 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:15,866 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:15,867 INFO L423 AbstractCegarLoop]: === Iteration 4 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:15,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1638167589, now seen corresponding path program 1 times [2018-12-09 19:41:15,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:15,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:15,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,868 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:15,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:41:15,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 19:41:15,899 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:41:15,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 19:41:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 19:41:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 19:41:15,900 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-12-09 19:41:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:15,926 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-12-09 19:41:15,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 19:41:15,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 19:41:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:15,928 INFO L225 Difference]: With dead ends: 38 [2018-12-09 19:41:15,928 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 19:41:15,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 19:41:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 19:41:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2018-12-09 19:41:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-09 19:41:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-12-09 19:41:15,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2018-12-09 19:41:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:15,934 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-12-09 19:41:15,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 19:41:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-12-09 19:41:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 19:41:15,936 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:15,936 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:15,936 INFO L423 AbstractCegarLoop]: === Iteration 5 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:15,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:15,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1245140579, now seen corresponding path program 1 times [2018-12-09 19:41:15,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:15,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:15,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,937 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:15,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:41:15,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 19:41:15,962 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:41:15,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 19:41:15,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 19:41:15,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 19:41:15,962 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2018-12-09 19:41:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:15,983 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-09 19:41:15,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 19:41:15,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-12-09 19:41:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:15,983 INFO L225 Difference]: With dead ends: 30 [2018-12-09 19:41:15,984 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 19:41:15,984 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 [2018-12-09 19:41:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 19:41:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-12-09 19:41:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 19:41:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-12-09 19:41:15,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-12-09 19:41:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:15,985 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-12-09 19:41:15,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 19:41:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-12-09 19:41:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 19:41:15,986 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:15,986 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:15,986 INFO L423 AbstractCegarLoop]: === Iteration 6 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:15,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1207598408, now seen corresponding path program 1 times [2018-12-09 19:41:15,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:15,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:15,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:15,987 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:16,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 19:41:16,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-12-09 19:41:16,140 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 19:41:16,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 19:41:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 19:41:16,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-12-09 19:41:16,141 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-12-09 19:41:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:16,258 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-12-09 19:41:16,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 19:41:16,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-12-09 19:41:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:16,258 INFO L225 Difference]: With dead ends: 29 [2018-12-09 19:41:16,258 INFO L226 Difference]: Without dead ends: 20 [2018-12-09 19:41:16,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-12-09 19:41:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-09 19:41:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-09 19:41:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 19:41:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-09 19:41:16,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2018-12-09 19:41:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:16,261 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-09 19:41:16,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 19:41:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-09 19:41:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 19:41:16,262 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:16,262 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:16,262 INFO L423 AbstractCegarLoop]: === Iteration 7 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:16,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash -949432970, now seen corresponding path program 1 times [2018-12-09 19:41:16,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:16,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:16,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:16,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:16,264 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:16,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:41:16,408 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:41:16,409 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-09 19:41:16,410 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [5], [9], [10], [12], [16], [18], [23], [35], [38], [46], [48], [53], [54], [55], [57] [2018-12-09 19:41:16,431 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 19:41:16,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 19:41:16,524 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 19:41:16,525 INFO L272 AbstractInterpreter]: Visited 18 different actions 23 times. Merged at 5 different actions 5 times. Never widened. Performed 176 root evaluator evaluations with a maximum evaluation depth of 5. Performed 176 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-12-09 19:41:16,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:16,531 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 19:41:16,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:41:16,531 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/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 [2018-12-09 19:41:16,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:16,537 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 19:41:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:16,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:41:16,620 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 [2018-12-09 19:41:16,622 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:41:16,627 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:41:16,627 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2018-12-09 19:41:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:16,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:41:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:17,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:41:17,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 30 [2018-12-09 19:41:17,170 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:41:17,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 19:41:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 19:41:17,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2018-12-09 19:41:17,171 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 22 states. [2018-12-09 19:41:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:17,487 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-09 19:41:17,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 19:41:17,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2018-12-09 19:41:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:17,487 INFO L225 Difference]: With dead ends: 26 [2018-12-09 19:41:17,487 INFO L226 Difference]: Without dead ends: 26 [2018-12-09 19:41:17,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 19:41:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-09 19:41:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-09 19:41:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 19:41:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-09 19:41:17,490 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2018-12-09 19:41:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:17,490 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-09 19:41:17,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 19:41:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-09 19:41:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 19:41:17,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 19:41:17,490 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 19:41:17,490 INFO L423 AbstractCegarLoop]: === Iteration 8 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2018-12-09 19:41:17,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 19:41:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 837515588, now seen corresponding path program 2 times [2018-12-09 19:41:17,491 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 19:41:17,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:17,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 19:41:17,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 19:41:17,491 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 19:41:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 19:41:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:17,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:41:17,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 19:41:17,621 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 19:41:17,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 19:41:17,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 19:41:17,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/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 [2018-12-09 19:41:17,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 19:41:17,627 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 19:41:17,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 19:41:17,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 19:41:17,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 19:41:17,650 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 [2018-12-09 19:41:17,650 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-09 19:41:17,652 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 19:41:17,653 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-12-09 19:41:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:17,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 19:41:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 19:41:18,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 19:41:18,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2018-12-09 19:41:18,752 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 19:41:18,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-09 19:41:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-09 19:41:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2018-12-09 19:41:18,753 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 24 states. [2018-12-09 19:41:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 19:41:19,847 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-09 19:41:19,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-09 19:41:19,847 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-12-09 19:41:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 19:41:19,848 INFO L225 Difference]: With dead ends: 30 [2018-12-09 19:41:19,848 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 19:41:19,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2018-12-09 19:41:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 19:41:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 19:41:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 19:41:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 19:41:19,849 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-12-09 19:41:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 19:41:19,849 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 19:41:19,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-09 19:41:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 19:41:19,849 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 19:41:19,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:41:19 BoogieIcfgContainer [2018-12-09 19:41:19,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 19:41:19,852 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 19:41:19,852 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 19:41:19,852 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 19:41:19,853 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:41:15" (3/4) ... [2018-12-09 19:41:19,855 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 19:41:19,858 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 19:41:19,858 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cmemrchr [2018-12-09 19:41:19,858 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 19:41:19,861 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2018-12-09 19:41:19,861 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-09 19:41:19,861 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 19:41:19,885 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_27612823-187b-4804-9493-73938c928a46/bin-2019/utaipan/witness.graphml [2018-12-09 19:41:19,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 19:41:19,885 INFO L168 Benchmark]: Toolchain (without parser) took 5179.06 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 321.9 MB). Free memory was 953.5 MB in the beginning and 1.3 GB in the end (delta: -303.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 19:41:19,886 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:41:19,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 953.5 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-12-09 19:41:19,887 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:41:19,887 INFO L168 Benchmark]: Boogie Preprocessor took 15.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 19:41:19,887 INFO L168 Benchmark]: RCFGBuilder took 146.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-09 19:41:19,887 INFO L168 Benchmark]: TraceAbstraction took 4721.47 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -160.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2018-12-09 19:41:19,887 INFO L168 Benchmark]: Witness Printer took 32.80 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. [2018-12-09 19:41:19,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 243.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 953.5 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4721.47 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 181.9 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -160.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. * Witness Printer took 32.80 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: 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 4 procedures, 28 locations, 3 error locations. SAFE Result, 4.6s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 1.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 149 SDtfs, 219 SDslu, 701 SDs, 0 SdLazy, 580 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=2, 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, 8 MinimizatonAttempts, 46 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 47724 SizeOfPredicates, 24 NumberOfNonLiveVariables, 228 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 2/35 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...