./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down-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_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/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 f25230c4e3ada1aa4514132cfb87afb0e539c23b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 20:20:16,324 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 20:20:16,324 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 20:20:16,330 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 20:20:16,331 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 20:20:16,331 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 20:20:16,332 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 20:20:16,332 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 20:20:16,333 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 20:20:16,334 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 20:20:16,334 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 20:20:16,334 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 20:20:16,335 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 20:20:16,335 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 20:20:16,335 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 20:20:16,336 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 20:20:16,336 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 20:20:16,337 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 20:20:16,338 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 20:20:16,339 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 20:20:16,339 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 20:20:16,340 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 20:20:16,341 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 20:20:16,341 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 20:20:16,341 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 20:20:16,341 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 20:20:16,342 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 20:20:16,342 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 20:20:16,343 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 20:20:16,343 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 20:20:16,343 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 20:20:16,344 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 20:20:16,344 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 20:20:16,344 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 20:20:16,344 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 20:20:16,345 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 20:20:16,345 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-08 20:20:16,352 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 20:20:16,352 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 20:20:16,353 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 20:20:16,353 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 20:20:16,353 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 20:20:16,353 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 20:20:16,353 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 20:20:16,353 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 20:20:16,353 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 20:20:16,354 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 20:20:16,354 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 20:20:16,354 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 20:20:16,354 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 20:20:16,354 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 20:20:16,354 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 20:20:16,354 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 20:20:16,354 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 20:20:16,355 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 20:20:16,355 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 20:20:16,356 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 20:20:16,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 20:20:16,356 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_65587e55-c8fb-409f-846b-72c3882c245b/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 -> f25230c4e3ada1aa4514132cfb87afb0e539c23b [2018-12-08 20:20:16,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 20:20:16,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 20:20:16,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 20:20:16,387 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 20:20:16,387 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 20:20:16,387 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/../../sv-benchmarks/c/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i [2018-12-08 20:20:16,431 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/data/128788184/4b017873c3e74b819c2875fa5abef819/FLAGc75c986e6 [2018-12-08 20:20:16,779 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 20:20:16,779 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/sv-benchmarks/c/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i [2018-12-08 20:20:16,785 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/data/128788184/4b017873c3e74b819c2875fa5abef819/FLAGc75c986e6 [2018-12-08 20:20:17,162 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/data/128788184/4b017873c3e74b819c2875fa5abef819 [2018-12-08 20:20:17,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 20:20:17,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 20:20:17,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 20:20:17,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 20:20:17,171 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 20:20:17,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eda5476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17, skipping insertion in model container [2018-12-08 20:20:17,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 20:20:17,204 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 20:20:17,359 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:20:17,365 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 20:20:17,419 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:20:17,450 INFO L195 MainTranslator]: Completed translation [2018-12-08 20:20:17,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17 WrapperNode [2018-12-08 20:20:17,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 20:20:17,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 20:20:17,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 20:20:17,451 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 20:20:17,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 20:20:17,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 20:20:17,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 20:20:17,469 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 20:20:17,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... [2018-12-08 20:20:17,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 20:20:17,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 20:20:17,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 20:20:17,485 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 20:20:17,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/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 [2018-12-08 20:20:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 20:20:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 20:20:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 20:20:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 20:20:17,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 20:20:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 20:20:17,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 20:20:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 20:20:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 20:20:17,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 20:20:17,650 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 20:20:17,650 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-08 20:20:17,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:20:17 BoogieIcfgContainer [2018-12-08 20:20:17,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 20:20:17,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 20:20:17,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 20:20:17,653 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 20:20:17,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:20:17" (1/3) ... [2018-12-08 20:20:17,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158bf140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:20:17, skipping insertion in model container [2018-12-08 20:20:17,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:20:17" (2/3) ... [2018-12-08 20:20:17,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158bf140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:20:17, skipping insertion in model container [2018-12-08 20:20:17,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:20:17" (3/3) ... [2018-12-08 20:20:17,656 INFO L112 eAbstractionObserver]: Analyzing ICFG count_down-alloca_true-valid-memsafety_true-termination.i [2018-12-08 20:20:17,663 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 20:20:17,667 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-12-08 20:20:17,677 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2018-12-08 20:20:17,692 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 20:20:17,692 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-08 20:20:17,692 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 20:20:17,692 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 20:20:17,692 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 20:20:17,692 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 20:20:17,692 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 20:20:17,692 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 20:20:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-12-08 20:20:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 20:20:17,706 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:17,706 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:17,707 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:17,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1191221624, now seen corresponding path program 1 times [2018-12-08 20:20:17,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:17,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:17,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:17,739 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:17,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:20:17,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 20:20:17,800 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:17,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 20:20:17,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 20:20:17,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:20:17,812 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2018-12-08 20:20:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:17,848 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-08 20:20:17,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 20:20:17,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-08 20:20:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:17,855 INFO L225 Difference]: With dead ends: 36 [2018-12-08 20:20:17,855 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 20:20:17,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:20:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 20:20:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 20:20:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 20:20:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-12-08 20:20:17,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2018-12-08 20:20:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:17,877 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-12-08 20:20:17,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 20:20:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-12-08 20:20:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 20:20:17,877 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:17,877 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:17,877 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:17,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1992307641, now seen corresponding path program 1 times [2018-12-08 20:20:17,878 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:17,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:17,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:17,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:17,879 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:17,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:20:17,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 20:20:17,905 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:17,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 20:20:17,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 20:20:17,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:20:17,907 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2018-12-08 20:20:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:17,928 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-12-08 20:20:17,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 20:20:17,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-12-08 20:20:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:17,929 INFO L225 Difference]: With dead ends: 29 [2018-12-08 20:20:17,929 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 20:20:17,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:20:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 20:20:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-08 20:20:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-08 20:20:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-12-08 20:20:17,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2018-12-08 20:20:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:17,932 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-12-08 20:20:17,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 20:20:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-12-08 20:20:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 20:20:17,932 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:17,932 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:17,933 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:17,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1992307640, now seen corresponding path program 1 times [2018-12-08 20:20:17,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:17,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:17,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:17,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:17,934 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:20:18,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 20:20:18,020 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:18,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 20:20:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 20:20:18,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 20:20:18,021 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2018-12-08 20:20:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:18,060 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-12-08 20:20:18,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:20:18,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-12-08 20:20:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:18,061 INFO L225 Difference]: With dead ends: 33 [2018-12-08 20:20:18,061 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 20:20:18,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-08 20:20:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 20:20:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-12-08 20:20:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-08 20:20:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2018-12-08 20:20:18,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 12 [2018-12-08 20:20:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:18,064 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2018-12-08 20:20:18,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 20:20:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2018-12-08 20:20:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:20:18,064 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:18,064 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:18,065 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:18,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 275021761, now seen corresponding path program 1 times [2018-12-08 20:20:18,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:18,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:18,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:18,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:20:18,094 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-08 20:20:18,095 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [12], [16], [24], [27], [31], [33], [35], [78], [79], [80] [2018-12-08 20:20:18,115 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:20:18,115 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:20:18,196 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:20:18,197 INFO L272 AbstractInterpreter]: Visited 14 different actions 15 times. Merged at 1 different actions 1 times. Never widened. Performed 95 root evaluator evaluations with a maximum evaluation depth of 4. Performed 95 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-12-08 20:20:18,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:18,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:20:18,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:18,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/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 [2018-12-08 20:20:18,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:18,211 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:20:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,294 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 20:20:18,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2018-12-08 20:20:18,294 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:18,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:20:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:20:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-08 20:20:18,295 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2018-12-08 20:20:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:18,320 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2018-12-08 20:20:18,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:20:18,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-08 20:20:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:18,321 INFO L225 Difference]: With dead ends: 54 [2018-12-08 20:20:18,321 INFO L226 Difference]: Without dead ends: 54 [2018-12-08 20:20:18,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-12-08 20:20:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-08 20:20:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2018-12-08 20:20:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 20:20:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-12-08 20:20:18,323 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2018-12-08 20:20:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:18,324 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-12-08 20:20:18,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:20:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-12-08 20:20:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:20:18,324 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:18,324 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:18,324 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:18,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash -118005249, now seen corresponding path program 1 times [2018-12-08 20:20:18,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:18,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:18,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:18,325 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:18,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:20:18,397 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-08 20:20:18,398 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [10], [12], [16], [24], [27], [31], [33], [35], [78], [79], [80] [2018-12-08 20:20:18,398 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:20:18,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:20:18,459 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:20:18,459 INFO L272 AbstractInterpreter]: Visited 14 different actions 34 times. Merged at 5 different actions 20 times. Never widened. Performed 267 root evaluator evaluations with a maximum evaluation depth of 4. Performed 267 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-12-08 20:20:18,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:18,464 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:20:18,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:18,464 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/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 [2018-12-08 20:20:18,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:18,471 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:20:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:18,500 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 8 treesize of output 7 [2018-12-08 20:20:18,501 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:20:18,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 20:20:18,505 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-12-08 20:20:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:20:18,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-08 20:20:18,624 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:20:18,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 20:20:18,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 20:20:18,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-12-08 20:20:18,625 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2018-12-08 20:20:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:18,681 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2018-12-08 20:20:18,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 20:20:18,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-12-08 20:20:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:18,682 INFO L225 Difference]: With dead ends: 39 [2018-12-08 20:20:18,682 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 20:20:18,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-12-08 20:20:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 20:20:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2018-12-08 20:20:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-08 20:20:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2018-12-08 20:20:18,686 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2018-12-08 20:20:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:18,686 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2018-12-08 20:20:18,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 20:20:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2018-12-08 20:20:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 20:20:18,687 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:18,687 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:18,687 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:18,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash -64307563, now seen corresponding path program 1 times [2018-12-08 20:20:18,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:18,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:18,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:18,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:18,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:18,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:20:18,753 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-08 20:20:18,753 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [12], [16], [22], [24], [27], [31], [35], [39], [47], [54], [78], [79], [80] [2018-12-08 20:20:18,754 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:20:18,754 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:20:18,768 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:20:18,768 INFO L272 AbstractInterpreter]: Visited 17 different actions 19 times. Merged at 1 different actions 1 times. Never widened. Performed 103 root evaluator evaluations with a maximum evaluation depth of 4. Performed 103 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 21 variables. [2018-12-08 20:20:18,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:18,769 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:20:18,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:18,769 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:20:18,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:18,775 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:20:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:18,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:18,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2018-12-08 20:20:18,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-08 20:20:18,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2018-12-08 20:20:18,833 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 20:20:18,835 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-08 20:20:18,835 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:11 [2018-12-08 20:20:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:18,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:20:18,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2018-12-08 20:20:18,859 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:20:18,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 20:20:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 20:20:18,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-08 20:20:18,860 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 10 states. [2018-12-08 20:20:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:19,031 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2018-12-08 20:20:19,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 20:20:19,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-12-08 20:20:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:19,032 INFO L225 Difference]: With dead ends: 100 [2018-12-08 20:20:19,032 INFO L226 Difference]: Without dead ends: 100 [2018-12-08 20:20:19,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2018-12-08 20:20:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-08 20:20:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 45. [2018-12-08 20:20:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 20:20:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2018-12-08 20:20:19,035 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2018-12-08 20:20:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:19,035 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2018-12-08 20:20:19,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 20:20:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2018-12-08 20:20:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-08 20:20:19,036 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:19,036 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:19,036 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:19,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:19,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1735370209, now seen corresponding path program 1 times [2018-12-08 20:20:19,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:19,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:19,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,037 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 20:20:19,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:20:19,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 20:20:19,058 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:19,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 20:20:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 20:20:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 20:20:19,059 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 4 states. [2018-12-08 20:20:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:19,076 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2018-12-08 20:20:19,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 20:20:19,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-08 20:20:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:19,077 INFO L225 Difference]: With dead ends: 46 [2018-12-08 20:20:19,077 INFO L226 Difference]: Without dead ends: 46 [2018-12-08 20:20:19,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-08 20:20:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-08 20:20:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-12-08 20:20:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-08 20:20:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2018-12-08 20:20:19,079 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2018-12-08 20:20:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:19,080 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2018-12-08 20:20:19,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 20:20:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2018-12-08 20:20:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 20:20:19,080 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:19,080 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:19,080 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:19,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1422800552, now seen corresponding path program 1 times [2018-12-08 20:20:19,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:19,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:19,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,081 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:19,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:19,179 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:20:19,179 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-08 20:20:19,179 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [8], [12], [16], [22], [24], [27], [31], [35], [39], [47], [52], [54], [57], [71], [78], [79], [80] [2018-12-08 20:20:19,180 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:20:19,180 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:20:19,195 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:20:19,196 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Merged at 2 different actions 2 times. Never widened. Performed 118 root evaluator evaluations with a maximum evaluation depth of 4. Performed 118 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 23 variables. [2018-12-08 20:20:19,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:19,197 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:20:19,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:19,197 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:20:19,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:19,205 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:20:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:19,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 20:20:19,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 20:20:19,276 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 20:20:19,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9] total 13 [2018-12-08 20:20:19,276 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:19,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:20:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:20:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-12-08 20:20:19,276 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2018-12-08 20:20:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:19,299 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2018-12-08 20:20:19,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:20:19,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-08 20:20:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:19,300 INFO L225 Difference]: With dead ends: 56 [2018-12-08 20:20:19,300 INFO L226 Difference]: Without dead ends: 56 [2018-12-08 20:20:19,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-12-08 20:20:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-08 20:20:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-12-08 20:20:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-08 20:20:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2018-12-08 20:20:19,304 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2018-12-08 20:20:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:19,304 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2018-12-08 20:20:19,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:20:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2018-12-08 20:20:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-08 20:20:19,305 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:19,305 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:19,305 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:19,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 142936874, now seen corresponding path program 1 times [2018-12-08 20:20:19,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:19,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:19,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,306 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:19,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:19,361 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:20:19,361 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-08 20:20:19,361 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [10], [12], [16], [22], [24], [27], [31], [35], [39], [47], [52], [54], [57], [71], [78], [79], [80] [2018-12-08 20:20:19,362 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:20:19,362 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:20:19,397 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:20:19,398 INFO L272 AbstractInterpreter]: Visited 20 different actions 48 times. Merged at 11 different actions 26 times. Widened at 1 different actions 1 times. Performed 278 root evaluator evaluations with a maximum evaluation depth of 4. Performed 278 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 4 fixpoints after 4 different actions. Largest state had 23 variables. [2018-12-08 20:20:19,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:19,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:20:19,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:20:19,399 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:20:19,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:19,406 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:20:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:19,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:20:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:19,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:20:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:20:19,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:20:19,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2018-12-08 20:20:19,508 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:20:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 20:20:19,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 20:20:19,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-12-08 20:20:19,508 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 13 states. [2018-12-08 20:20:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:19,725 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2018-12-08 20:20:19,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-08 20:20:19,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-12-08 20:20:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:19,725 INFO L225 Difference]: With dead ends: 74 [2018-12-08 20:20:19,725 INFO L226 Difference]: Without dead ends: 74 [2018-12-08 20:20:19,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2018-12-08 20:20:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-08 20:20:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2018-12-08 20:20:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-08 20:20:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2018-12-08 20:20:19,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 21 [2018-12-08 20:20:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:19,729 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2018-12-08 20:20:19,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 20:20:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2018-12-08 20:20:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-08 20:20:19,729 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:20:19,729 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:20:19,729 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION]=== [2018-12-08 20:20:19,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:20:19,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1157142958, now seen corresponding path program 1 times [2018-12-08 20:20:19,730 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:20:19,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:20:19,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:20:19,730 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:20:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:20:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:20:19,766 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:20:19,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 20:20:19,766 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:20:19,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 20:20:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 20:20:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-08 20:20:19,767 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 4 states. [2018-12-08 20:20:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:20:19,781 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2018-12-08 20:20:19,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 20:20:19,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-12-08 20:20:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:20:19,782 INFO L225 Difference]: With dead ends: 47 [2018-12-08 20:20:19,782 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 20:20:19,782 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 [2018-12-08 20:20:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 20:20:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 20:20:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 20:20:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 20:20:19,782 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-12-08 20:20:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:20:19,782 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 20:20:19,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 20:20:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 20:20:19,782 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 20:20:19,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 08:20:19 BoogieIcfgContainer [2018-12-08 20:20:19,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 20:20:19,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 20:20:19,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 20:20:19,786 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 20:20:19,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:20:17" (3/4) ... [2018-12-08 20:20:19,788 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 20:20:19,791 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 20:20:19,791 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 20:20:19,793 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-12-08 20:20:19,794 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 20:20:19,794 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 20:20:19,794 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 20:20:19,818 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_65587e55-c8fb-409f-846b-72c3882c245b/bin-2019/utaipan/witness.graphml [2018-12-08 20:20:19,818 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 20:20:19,818 INFO L168 Benchmark]: Toolchain (without parser) took 2653.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 947.0 MB in the beginning and 1.0 GB in the end (delta: -95.7 MB). Peak memory consumption was 72.1 MB. Max. memory is 11.5 GB. [2018-12-08 20:20:19,819 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:20:19,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 61.3 MB). Free memory was 947.0 MB in the beginning and 1.0 GB in the end (delta: -99.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-12-08 20:20:19,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.01 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:20:19,820 INFO L168 Benchmark]: Boogie Preprocessor took 15.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2018-12-08 20:20:19,820 INFO L168 Benchmark]: RCFGBuilder took 166.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2018-12-08 20:20:19,820 INFO L168 Benchmark]: TraceAbstraction took 2134.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 106.4 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -24.5 MB). Peak memory consumption was 82.0 MB. Max. memory is 11.5 GB. [2018-12-08 20:20:19,820 INFO L168 Benchmark]: Witness Printer took 32.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. [2018-12-08 20:20:19,822 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 283.90 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 61.3 MB). Free memory was 947.0 MB in the beginning and 1.0 GB in the end (delta: -99.7 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.01 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 166.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2134.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 106.4 MB). Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: -24.5 MB). Peak memory consumption was 82.0 MB. Max. memory is 11.5 GB. * Witness Printer took 32.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.8 MB). Peak memory consumption was 5.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 556]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 555]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 555]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 556]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 556]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 556]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 36 locations, 9 error locations. SAFE Result, 2.0s OverallTime, 10 OverallIterations, 2 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 224 SDtfs, 652 SDslu, 438 SDs, 0 SdLazy, 505 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 165 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 106 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 256 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 327 ConstructedInterpolants, 7 QuantifiedInterpolants, 30019 SizeOfPredicates, 17 NumberOfNonLiveVariables, 366 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 20 InterpolantComputations, 9 PerfectInterpolantSequences, 26/42 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...