./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10bdb405bd6bca2bddb8b686c44dad291e109402 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:37:53,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:37:53,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:37:53,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:37:53,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:37:53,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:37:53,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:37:53,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:37:53,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:37:53,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:37:53,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:37:53,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:37:53,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:37:53,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:37:53,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:37:53,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:37:53,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:37:53,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:37:53,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:37:53,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:37:53,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:37:53,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:37:53,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:37:53,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:37:53,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:37:53,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:37:53,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:37:53,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:37:53,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:37:53,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:37:53,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:37:53,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:37:53,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:37:53,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:37:53,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:37:53,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:37:53,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:37:53,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:37:53,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:37:53,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:37:53,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:37:53,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 14:37:53,376 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:37:53,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:37:53,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 14:37:53,377 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 14:37:53,377 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 14:37:53,377 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 14:37:53,378 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 14:37:53,378 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 14:37:53,379 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 14:37:53,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:37:53,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:37:53,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:37:53,379 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:37:53,379 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 14:37:53,380 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:37:53,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:37:53,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 14:37:53,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:37:53,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:37:53,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 14:37:53,382 INFO L138 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/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10bdb405bd6bca2bddb8b686c44dad291e109402 [2019-12-07 14:37:53,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:37:53,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:37:53,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:37:53,492 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:37:53,492 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:37:53,492 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2019-12-07 14:37:53,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/data/cdc865b8f/bf4b440ed11f4a64947ed907063dc98c/FLAG5ca83ac83 [2019-12-07 14:37:54,022 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:37:54,023 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/sv-benchmarks/c/array-memsafety/openbsd_cmemset-alloca-1.i [2019-12-07 14:37:54,033 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/data/cdc865b8f/bf4b440ed11f4a64947ed907063dc98c/FLAG5ca83ac83 [2019-12-07 14:37:54,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/data/cdc865b8f/bf4b440ed11f4a64947ed907063dc98c [2019-12-07 14:37:54,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:37:54,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:37:54,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:37:54,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:37:54,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:37:54,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae2dff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54, skipping insertion in model container [2019-12-07 14:37:54,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:37:54,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:37:54,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:37:54,304 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:37:54,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:37:54,361 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:37:54,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54 WrapperNode [2019-12-07 14:37:54,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:37:54,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:37:54,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:37:54,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:37:54,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:37:54,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:37:54,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:37:54,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:37:54,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... [2019-12-07 14:37:54,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:37:54,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:37:54,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:37:54,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:37:54,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:37:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 14:37:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 14:37:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 14:37:54,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:37:54,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:37:54,668 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:37:54,669 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 14:37:54,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:37:54 BoogieIcfgContainer [2019-12-07 14:37:54,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:37:54,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:37:54,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:37:54,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:37:54,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:37:54" (1/3) ... [2019-12-07 14:37:54,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15648aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:37:54, skipping insertion in model container [2019-12-07 14:37:54,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:37:54" (2/3) ... [2019-12-07 14:37:54,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15648aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:37:54, skipping insertion in model container [2019-12-07 14:37:54,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:37:54" (3/3) ... [2019-12-07 14:37:54,674 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cmemset-alloca-1.i [2019-12-07 14:37:54,680 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:37:54,685 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-12-07 14:37:54,692 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 14:37:54,704 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:37:54,704 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 14:37:54,704 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:37:54,704 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:37:54,705 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:37:54,705 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:37:54,705 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:37:54,705 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:37:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 14:37:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 14:37:54,717 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:54,718 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 14:37:54,718 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:54,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2609821, now seen corresponding path program 1 times [2019-12-07 14:37:54,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:54,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193180203] [2019-12-07 14:37:54,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:54,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193180203] [2019-12-07 14:37:54,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:37:54,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:37:54,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870032394] [2019-12-07 14:37:54,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:37:54,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:37:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:37:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:37:54,860 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 5 states. [2019-12-07 14:37:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:54,910 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-12-07 14:37:54,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:37:54,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-12-07 14:37:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:54,920 INFO L225 Difference]: With dead ends: 11 [2019-12-07 14:37:54,920 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 14:37:54,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:37:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 14:37:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-12-07 14:37:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 14:37:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 14:37:54,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2019-12-07 14:37:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:54,946 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 14:37:54,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:37:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-12-07 14:37:54,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 14:37:54,946 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:54,946 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 14:37:54,946 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2609822, now seen corresponding path program 1 times [2019-12-07 14:37:54,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:54,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464284633] [2019-12-07 14:37:54,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:55,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464284633] [2019-12-07 14:37:55,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:37:55,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:37:55,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757305036] [2019-12-07 14:37:55,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:37:55,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:37:55,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:37:55,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:37:55,022 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2019-12-07 14:37:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:55,060 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-12-07 14:37:55,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:37:55,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-12-07 14:37:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:55,061 INFO L225 Difference]: With dead ends: 14 [2019-12-07 14:37:55,061 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 14:37:55,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:37:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 14:37:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2019-12-07 14:37:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:37:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-12-07 14:37:55,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2019-12-07 14:37:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:55,064 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-12-07 14:37:55,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:37:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-12-07 14:37:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 14:37:55,064 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:55,064 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 14:37:55,064 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2629898, now seen corresponding path program 1 times [2019-12-07 14:37:55,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:55,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999110765] [2019-12-07 14:37:55,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:55,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999110765] [2019-12-07 14:37:55,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:37:55,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:37:55,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311695204] [2019-12-07 14:37:55,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:37:55,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:37:55,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:37:55,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:37:55,117 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2019-12-07 14:37:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:55,121 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-12-07 14:37:55,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:37:55,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 14:37:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:55,122 INFO L225 Difference]: With dead ends: 11 [2019-12-07 14:37:55,122 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 14:37:55,122 INFO L630 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 [2019-12-07 14:37:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 14:37:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 14:37:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:37:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-12-07 14:37:55,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2019-12-07 14:37:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:55,124 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-12-07 14:37:55,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:37:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-12-07 14:37:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 14:37:55,124 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:55,124 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-12-07 14:37:55,125 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 440602860, now seen corresponding path program 1 times [2019-12-07 14:37:55,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:55,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151232597] [2019-12-07 14:37:55,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:55,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151232597] [2019-12-07 14:37:55,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685852085] [2019-12-07 14:37:55,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:55,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 14:37:55,319 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:55,368 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 14:37:55,368 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:55,371 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 14:37:55,372 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 6 treesize of output 1 [2019-12-07 14:37:55,372 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:55,377 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:55,377 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:55,377 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2019-12-07 14:37:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:55,494 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:37:55,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:37:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:55,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616339460] [2019-12-07 14:37:55,642 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 14:37:55,642 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:37:55,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:37:55,651 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:37:55,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:37:56,158 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:37:56,320 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 14:37:56,690 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 112 [2019-12-07 14:37:56,903 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:37:56,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:37:56,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-12-07 14:37:56,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198940032] [2019-12-07 14:37:56,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 14:37:56,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:37:56,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 14:37:56,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2019-12-07 14:37:56,905 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 20 states. [2019-12-07 14:37:57,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:57,071 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-12-07 14:37:57,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:37:57,071 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 7 [2019-12-07 14:37:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:57,072 INFO L225 Difference]: With dead ends: 14 [2019-12-07 14:37:57,076 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 14:37:57,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2019-12-07 14:37:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 14:37:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 14:37:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 14:37:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 14:37:57,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2019-12-07 14:37:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:57,078 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 14:37:57,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 14:37:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 14:37:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 14:37:57,079 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:57,079 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:37:57,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:57,280 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash 440601794, now seen corresponding path program 1 times [2019-12-07 14:37:57,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:57,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131258077] [2019-12-07 14:37:57,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:57,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131258077] [2019-12-07 14:37:57,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:37:57,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:37:57,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58168727] [2019-12-07 14:37:57,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:37:57,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:37:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:37:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:37:57,349 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2019-12-07 14:37:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:57,357 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-12-07 14:37:57,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:37:57,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 14:37:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:57,358 INFO L225 Difference]: With dead ends: 13 [2019-12-07 14:37:57,358 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 14:37:57,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:37:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 14:37:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 14:37:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:37:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-12-07 14:37:57,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2019-12-07 14:37:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:57,360 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-12-07 14:37:57,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:37:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-12-07 14:37:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:37:57,360 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:57,360 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-12-07 14:37:57,361 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash 580552670, now seen corresponding path program 2 times [2019-12-07 14:37:57,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:57,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688052175] [2019-12-07 14:37:57,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:57,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688052175] [2019-12-07 14:37:57,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809583004] [2019-12-07 14:37:57,504 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:57,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 14:37:57,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:37:57,550 WARN L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 14:37:57,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:57,653 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:37:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:57,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009093260] [2019-12-07 14:37:57,829 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 14:37:57,829 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:37:57,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:37:57,829 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:37:57,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:37:58,013 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:37:58,156 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 14:37:58,328 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2019-12-07 14:37:58,481 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-12-07 14:37:58,545 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:37:58,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:37:58,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2019-12-07 14:37:58,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655389757] [2019-12-07 14:37:58,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 14:37:58,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:37:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 14:37:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2019-12-07 14:37:58,546 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 24 states. [2019-12-07 14:37:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:59,031 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-12-07 14:37:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 14:37:59,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 10 [2019-12-07 14:37:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:59,032 INFO L225 Difference]: With dead ends: 20 [2019-12-07 14:37:59,032 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 14:37:59,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 14:37:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 14:37:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 14:37:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 14:37:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-12-07 14:37:59,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2019-12-07 14:37:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:59,035 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-12-07 14:37:59,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 14:37:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-12-07 14:37:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 14:37:59,036 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:59,036 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1] [2019-12-07 14:37:59,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:59,237 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-12-07 14:37:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1511687788, now seen corresponding path program 3 times [2019-12-07 14:37:59,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 14:37:59,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918631009] [2019-12-07 14:37:59,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:59,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918631009] [2019-12-07 14:37:59,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219040649] [2019-12-07 14:37:59,488 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:59,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:37:59,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:37:59,528 WARN L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 81 conjunts are in the unsatisfiable core [2019-12-07 14:37:59,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:59,791 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 14:38:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:38:00,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448238014] [2019-12-07 14:38:00,379 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-12-07 14:38:00,379 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 14:38:00,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 14:38:00,380 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 14:38:00,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 14:38:00,593 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 14:38:00,759 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-12-07 14:38:00,939 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2019-12-07 14:38:01,179 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 14:38:01,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 14:38:01,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2019-12-07 14:38:01,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827341668] [2019-12-07 14:38:01,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-07 14:38:01,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 14:38:01,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-07 14:38:01,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 14:38:01,181 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 41 states. [2019-12-07 14:38:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:38:02,131 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-12-07 14:38:02,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 14:38:02,131 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 19 [2019-12-07 14:38:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:38:02,132 INFO L225 Difference]: With dead ends: 22 [2019-12-07 14:38:02,132 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 14:38:02,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=473, Invalid=3687, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 14:38:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 14:38:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 14:38:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 14:38:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:38:02,137 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-12-07 14:38:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:38:02,137 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:38:02,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-07 14:38:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:38:02,137 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 14:38:02,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:38:02,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:38:02 BoogieIcfgContainer [2019-12-07 14:38:02,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:38:02,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:38:02,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:38:02,352 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:38:02,353 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:37:54" (3/4) ... [2019-12-07 14:38:02,362 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 14:38:02,374 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2019-12-07 14:38:02,374 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2019-12-07 14:38:02,374 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 14:38:02,404 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a4d589b8-9605-4805-b9c8-1a6c1a469d00/bin/utaipan/witness.graphml [2019-12-07 14:38:02,404 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:38:02,405 INFO L168 Benchmark]: Toolchain (without parser) took 8359.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 942.5 MB in the beginning and 1.2 GB in the end (delta: -232.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:38:02,405 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:38:02,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -151.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,405 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:38:02,406 INFO L168 Benchmark]: Boogie Preprocessor took 19.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,406 INFO L168 Benchmark]: RCFGBuilder took 257.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,406 INFO L168 Benchmark]: TraceAbstraction took 7679.66 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -123.0 MB). Peak memory consumption was 315.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,406 INFO L168 Benchmark]: Witness Printer took 53.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,408 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -151.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.17 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 257.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7679.66 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -123.0 MB). Peak memory consumption was 315.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 523]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 3 error locations. Result: SAFE, OverallTime: 7.6s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 22 SDslu, 55 SDs, 0 SdLazy, 664 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 25194 SizeOfPredicates, 40 NumberOfNonLiveVariables, 318 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 15/147 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...