./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/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 06914024aa49a34ce88c7dcbc25f89730c27c8e4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 04:47:03,446 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:47:03,447 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:47:03,456 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:47:03,456 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:47:03,457 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:47:03,458 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:47:03,459 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:47:03,461 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:47:03,461 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:47:03,462 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:47:03,463 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:47:03,463 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:47:03,464 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:47:03,465 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:47:03,466 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:47:03,467 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:47:03,468 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:47:03,469 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:47:03,470 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:47:03,471 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:47:03,472 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:47:03,473 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 04:47:03,473 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 04:47:03,473 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 04:47:03,475 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 04:47:03,476 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 04:47:03,476 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 04:47:03,477 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 04:47:03,478 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 04:47:03,478 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 04:47:03,479 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 04:47:03,479 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 04:47:03,479 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 04:47:03,480 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 04:47:03,480 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 04:47:03,480 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-10-27 04:47:03,491 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:47:03,491 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:47:03,492 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 04:47:03,492 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 04:47:03,492 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 04:47:03,492 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 04:47:03,492 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 04:47:03,493 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 04:47:03,493 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 04:47:03,493 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 04:47:03,493 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 04:47:03,493 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 04:47:03,494 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 04:47:03,494 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:47:03,495 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 04:47:03,495 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 04:47:03,495 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:47:03,496 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 04:47:03,496 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:47:03,497 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 04:47:03,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:47:03,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 04:47:03,498 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_cee57001-b16f-4a58-9596-182d48afe735/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 -> 06914024aa49a34ce88c7dcbc25f89730c27c8e4 [2018-10-27 04:47:03,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:47:03,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:47:03,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:47:03,537 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:47:03,538 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:47:03,539 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c [2018-10-27 04:47:03,586 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/data/0e402fbb7/3cbd20272c394a279035389eefbaec00/FLAGa8372f3ab [2018-10-27 04:47:03,953 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:47:03,953 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/sv-benchmarks/c/ldv-memsafety/memset3_true-valid-memsafety_true-termination.c [2018-10-27 04:47:03,957 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/data/0e402fbb7/3cbd20272c394a279035389eefbaec00/FLAGa8372f3ab [2018-10-27 04:47:03,966 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/data/0e402fbb7/3cbd20272c394a279035389eefbaec00 [2018-10-27 04:47:03,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:47:03,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 04:47:03,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:47:03,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:47:03,975 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:47:03,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:47:03" (1/1) ... [2018-10-27 04:47:03,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22307f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:03, skipping insertion in model container [2018-10-27 04:47:03,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:47:03" (1/1) ... [2018-10-27 04:47:03,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:47:04,001 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:47:04,114 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:47:04,120 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:47:04,131 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:47:04,143 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:47:04,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04 WrapperNode [2018-10-27 04:47:04,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:47:04,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 04:47:04,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 04:47:04,145 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 04:47:04,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 04:47:04,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:47:04,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:47:04,175 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:47:04,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... [2018-10-27 04:47:04,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:47:04,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:47:04,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:47:04,190 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:47:04,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/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 [2018-10-27 04:47:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:47:04,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:47:04,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-10-27 04:47:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-10-27 04:47:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:47:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:47:04,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:47:04,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:47:04,447 WARN L632 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-27 04:47:04,632 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:47:04,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:47:04 BoogieIcfgContainer [2018-10-27 04:47:04,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:47:04,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:47:04,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:47:04,636 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:47:04,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:47:03" (1/3) ... [2018-10-27 04:47:04,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b8076e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:47:04, skipping insertion in model container [2018-10-27 04:47:04,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:47:04" (2/3) ... [2018-10-27 04:47:04,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b8076e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:47:04, skipping insertion in model container [2018-10-27 04:47:04,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:47:04" (3/3) ... [2018-10-27 04:47:04,639 INFO L112 eAbstractionObserver]: Analyzing ICFG memset3_true-valid-memsafety_true-termination.c [2018-10-27 04:47:04,655 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:47:04,661 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-10-27 04:47:04,675 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2018-10-27 04:47:04,718 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:47:04,719 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-27 04:47:04,719 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:47:04,719 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:47:04,719 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:47:04,722 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:47:04,723 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:47:04,723 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:47:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-27 04:47:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-27 04:47:04,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:47:04,762 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:47:04,771 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION]=== [2018-10-27 04:47:04,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:47:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2018-10-27 04:47:04,779 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:47:04,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:04,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:47:04,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:04,825 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:47:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:47:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:04,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:47:04,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:47:04,898 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:47:04,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:47:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:47:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:47:04,910 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2018-10-27 04:47:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:47:04,961 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-27 04:47:04,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:47:04,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-27 04:47:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:47:04,968 INFO L225 Difference]: With dead ends: 19 [2018-10-27 04:47:04,968 INFO L226 Difference]: Without dead ends: 16 [2018-10-27 04:47:04,970 INFO L605 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 [2018-10-27 04:47:04,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-27 04:47:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-27 04:47:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-27 04:47:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-27 04:47:05,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2018-10-27 04:47:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:47:05,001 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-27 04:47:05,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:47:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-27 04:47:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-27 04:47:05,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:47:05,002 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:47:05,002 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION]=== [2018-10-27 04:47:05,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:47:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2018-10-27 04:47:05,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:47:05,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:05,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:47:05,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:05,004 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:47:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:47:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:05,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:47:05,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:47:05,064 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:47:05,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:47:05,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:47:05,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:47:05,065 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-10-27 04:47:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:47:05,073 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-27 04:47:05,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:47:05,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-27 04:47:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:47:05,074 INFO L225 Difference]: With dead ends: 15 [2018-10-27 04:47:05,074 INFO L226 Difference]: Without dead ends: 15 [2018-10-27 04:47:05,075 INFO L605 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 [2018-10-27 04:47:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-27 04:47:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-27 04:47:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-27 04:47:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-27 04:47:05,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2018-10-27 04:47:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:47:05,078 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-27 04:47:05,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:47:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-27 04:47:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-27 04:47:05,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:47:05,080 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:47:05,081 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION]=== [2018-10-27 04:47:05,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:47:05,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2018-10-27 04:47:05,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:47:05,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:05,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:47:05,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:05,082 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:47:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:47:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:05,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:47:05,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 04:47:05,147 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:47:05,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 04:47:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 04:47:05,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 04:47:05,148 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-10-27 04:47:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:47:05,214 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-27 04:47:05,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 04:47:05,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-27 04:47:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:47:05,215 INFO L225 Difference]: With dead ends: 18 [2018-10-27 04:47:05,215 INFO L226 Difference]: Without dead ends: 16 [2018-10-27 04:47:05,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 04:47:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-27 04:47:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-27 04:47:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-27 04:47:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-27 04:47:05,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-27 04:47:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:47:05,218 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-27 04:47:05,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 04:47:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-27 04:47:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 04:47:05,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:47:05,219 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:47:05,219 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION]=== [2018-10-27 04:47:05,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:47:05,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1971150090, now seen corresponding path program 1 times [2018-10-27 04:47:05,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:47:05,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:05,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:47:05,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:05,221 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:47:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:47:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:05,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:47:05,276 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:47:05,277 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-27 04:47:05,281 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [9], [10], [14], [18], [20], [21], [22], [23], [25], [26] [2018-10-27 04:47:05,327 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:47:05,327 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:47:05,569 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:47:05,570 INFO L272 AbstractInterpreter]: Visited 15 different actions 31 times. Merged at 1 different actions 8 times. Widened at 1 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 23 variables. [2018-10-27 04:47:05,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:47:05,603 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:47:05,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:47:05,603 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/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 [2018-10-27 04:47:05,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:47:05,611 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:47:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:47:05,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:47:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:05,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:47:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:05,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:47:05,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-10-27 04:47:05,984 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:47:05,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 04:47:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 04:47:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-27 04:47:05,985 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2018-10-27 04:47:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:47:06,007 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-27 04:47:06,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 04:47:06,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-27 04:47:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:47:06,009 INFO L225 Difference]: With dead ends: 19 [2018-10-27 04:47:06,009 INFO L226 Difference]: Without dead ends: 17 [2018-10-27 04:47:06,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:47:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-27 04:47:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-27 04:47:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 04:47:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-27 04:47:06,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-27 04:47:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:47:06,012 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-27 04:47:06,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 04:47:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-27 04:47:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 04:47:06,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:47:06,013 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:47:06,013 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION]=== [2018-10-27 04:47:06,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:47:06,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 2 times [2018-10-27 04:47:06,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:47:06,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:06,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:47:06,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:47:06,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:47:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:47:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:47:06,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:47:06,118 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:47:06,118 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 04:47:06,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 04:47:06,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:47:06,118 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/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 [2018-10-27 04:47:06,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 04:47:06,129 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 04:47:06,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-27 04:47:06,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 04:47:06,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:47:06,306 INFO L700 Elim1Store]: detected not equals via solver [2018-10-27 04:47:06,310 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-10-27 04:47:06,310 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-27 04:47:06,313 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-27 04:47:06,314 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-10-27 04:47:06,392 WARN L854 $PredicateComparison]: unable to prove that (exists ((main_ULTIMATE.dealloc_~addr.base Int)) (and (= |c_#valid| (store |c_old(#valid)| main_ULTIMATE.dealloc_~addr.base 0)) (= 0 (select |c_old(#valid)| main_ULTIMATE.dealloc_~addr.base)))) is different from true [2018-10-27 04:47:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 04:47:06,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:47:06,440 WARN L832 $PredicateComparison]: unable to prove that (forall ((|v_main_~#cstats~0.base_7| Int)) (or (not (= (select |c_#valid| |v_main_~#cstats~0.base_7|) 0)) (= (store |c_#valid| |v_main_~#cstats~0.base_7| 0) |c_old(#valid)|))) is different from false [2018-10-27 04:47:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 04:47:06,466 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:47:06,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-10-27 04:47:06,466 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:47:06,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 04:47:06,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 04:47:06,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=70, Unknown=2, NotChecked=34, Total=132 [2018-10-27 04:47:06,467 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-10-27 04:47:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:47:06,593 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-27 04:47:06,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 04:47:06,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-27 04:47:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:47:06,593 INFO L225 Difference]: With dead ends: 16 [2018-10-27 04:47:06,594 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 04:47:06,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=105, Unknown=2, NotChecked=42, Total=182 [2018-10-27 04:47:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 04:47:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 04:47:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 04:47:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 04:47:06,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-10-27 04:47:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:47:06,595 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 04:47:06,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 04:47:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 04:47:06,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 04:47:06,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:47:06 BoogieIcfgContainer [2018-10-27 04:47:06,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 04:47:06,601 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 04:47:06,601 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 04:47:06,601 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 04:47:06,601 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:47:04" (3/4) ... [2018-10-27 04:47:06,605 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-27 04:47:06,610 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-27 04:47:06,611 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2018-10-27 04:47:06,611 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-27 04:47:06,615 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-10-27 04:47:06,615 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-27 04:47:06,615 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-27 04:47:06,615 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-27 04:47:06,659 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cee57001-b16f-4a58-9596-182d48afe735/bin-2019/utaipan/witness.graphml [2018-10-27 04:47:06,659 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 04:47:06,660 INFO L168 Benchmark]: Toolchain (without parser) took 2689.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.8 MB). Free memory was 955.8 MB in the beginning and 1.1 GB in the end (delta: -106.4 MB). Peak memory consumption was 104.4 MB. Max. memory is 11.5 GB. [2018-10-27 04:47:06,661 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:47:06,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.68 ms. Allocated memory is still 1.0 GB. Free memory was 955.8 MB in the beginning and 943.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-27 04:47:06,662 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.63 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 04:47:06,662 INFO L168 Benchmark]: Boogie Preprocessor took 14.95 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 04:47:06,662 INFO L168 Benchmark]: RCFGBuilder took 443.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.8 MB). Free memory was 941.0 MB in the beginning and 1.2 GB in the end (delta: -255.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2018-10-27 04:47:06,663 INFO L168 Benchmark]: TraceAbstraction took 1966.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 131.0 MB). Peak memory consumption was 131.0 MB. Max. memory is 11.5 GB. [2018-10-27 04:47:06,663 INFO L168 Benchmark]: Witness Printer took 58.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2018-10-27 04:47:06,666 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 172.68 ms. Allocated memory is still 1.0 GB. Free memory was 955.8 MB in the beginning and 943.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.63 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.95 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 443.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.8 MB). Free memory was 941.0 MB in the beginning and 1.2 GB in the end (delta: -255.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1966.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 131.0 MB). Peak memory consumption was 131.0 MB. Max. memory is 11.5 GB. * Witness Printer took 58.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. SAFE Result, 1.8s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 12 SDslu, 85 SDs, 0 SdLazy, 48 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 90 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 112 ConstructedInterpolants, 9 QuantifiedInterpolants, 3720 SizeOfPredicates, 5 NumberOfNonLiveVariables, 159 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...