./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/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 a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:36:51,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:36:51,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:36:51,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:36:51,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:36:51,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:36:51,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:36:51,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:36:51,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:36:51,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:36:51,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:36:51,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:36:51,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:36:51,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:36:51,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:36:51,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:36:51,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:36:51,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:36:51,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:36:51,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:36:51,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:36:51,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:36:51,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:36:51,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:36:51,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:36:51,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:36:51,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:36:51,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:36:51,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:36:51,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:36:51,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:36:51,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:36:51,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:36:51,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:36:51,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:36:51,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:36:51,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:36:51,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:36:51,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:36:51,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:36:51,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:36:51,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:36:51,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:36:51,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:36:51,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:36:51,372 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:36:51,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:36:51,372 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:36:51,373 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:36:51,373 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:36:51,373 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:36:51,374 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:36:51,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:36:51,375 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:36:51,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:36:51,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:36:51,376 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:36:51,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:36:51,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:36:51,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:36:51,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:36:51,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:36:51,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:36:51,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:36:51,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:36:51,378 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:36:51,378 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:36:51,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:36:51,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:36:51,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:36:51,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:36:51,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:36:51,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:36:51,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:36:51,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:36:51,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:36:51,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:36:51,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:36:51,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:36:51,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:36:51,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:36:51,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:36:51,382 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2020-11-28 07:36:51,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:36:51,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:36:51,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:36:51,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:36:51,675 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:36:51,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-11-28 07:36:51,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/data/8ef6e0331/fe439a7a719444c39725ac9e8ecf0392/FLAG9dff3725d [2020-11-28 07:36:52,164 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:36:52,165 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-11-28 07:36:52,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/data/8ef6e0331/fe439a7a719444c39725ac9e8ecf0392/FLAG9dff3725d [2020-11-28 07:36:52,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/data/8ef6e0331/fe439a7a719444c39725ac9e8ecf0392 [2020-11-28 07:36:52,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:36:52,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:36:52,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:52,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:36:52,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:36:52,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373cee36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52, skipping insertion in model container [2020-11-28 07:36:52,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:36:52,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:36:52,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:52,780 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:36:52,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:52,829 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:36:52,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52 WrapperNode [2020-11-28 07:36:52,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:52,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:52,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:36:52,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:36:52,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:52,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:36:52,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:36:52,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:36:52,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... [2020-11-28 07:36:52,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:36:52,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:36:52,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:36:52,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:36:52,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/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 [2020-11-28 07:36:53,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:36:53,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:36:53,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:36:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:36:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:36:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:36:53,540 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:36:53,541 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:36:53,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:53 BoogieIcfgContainer [2020-11-28 07:36:53,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:36:53,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:36:53,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:36:53,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:36:53,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:36:52" (1/3) ... [2020-11-28 07:36:53,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f36d1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:53, skipping insertion in model container [2020-11-28 07:36:53,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:52" (2/3) ... [2020-11-28 07:36:53,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f36d1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:53, skipping insertion in model container [2020-11-28 07:36:53,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:53" (3/3) ... [2020-11-28 07:36:53,551 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2020-11-28 07:36:53,562 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:36:53,567 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 07:36:53,579 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 07:36:53,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:36:53,597 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:36:53,598 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:36:53,598 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:36:53,598 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:36:53,598 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:36:53,598 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:36:53,598 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:36:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-28 07:36:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:36:53,616 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:53,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:36:53,617 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash 3121969, now seen corresponding path program 1 times [2020-11-28 07:36:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:53,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413781769] [2020-11-28 07:36:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:53,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413781769] [2020-11-28 07:36:53,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:53,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:36:53,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816972162] [2020-11-28 07:36:53,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:53,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:53,822 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-28 07:36:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:53,905 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-28 07:36:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:53,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:36:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:53,916 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:36:53,916 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:36:53,918 INFO L677 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 [2020-11-28 07:36:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:36:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-28 07:36:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:36:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 07:36:53,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-28 07:36:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:53,957 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 07:36:53,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 07:36:53,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:36:53,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:53,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:36:53,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:36:53,959 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash 3050837, now seen corresponding path program 1 times [2020-11-28 07:36:53,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:53,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122744640] [2020-11-28 07:36:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:54,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122744640] [2020-11-28 07:36:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:36:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468805958] [2020-11-28 07:36:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:54,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:54,026 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-28 07:36:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:54,060 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-28 07:36:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:54,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:36:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:54,062 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:36:54,062 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:36:54,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:36:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:36:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:36:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-28 07:36:54,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-11-28 07:36:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:54,067 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-28 07:36:54,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-28 07:36:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:36:54,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:54,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:36:54,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:36:54,069 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash 3050838, now seen corresponding path program 1 times [2020-11-28 07:36:54,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:54,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091966867] [2020-11-28 07:36:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:54,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091966867] [2020-11-28 07:36:54,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:54,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:36:54,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883508835] [2020-11-28 07:36:54,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:54,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:54,128 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-11-28 07:36:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:54,181 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-28 07:36:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:54,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:36:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:54,182 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:36:54,183 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:36:54,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:36:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-28 07:36:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:36:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-11-28 07:36:54,187 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 4 [2020-11-28 07:36:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:54,187 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-11-28 07:36:54,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-11-28 07:36:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:36:54,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:54,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:36:54,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:36:54,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:54,189 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2020-11-28 07:36:54,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:54,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436958249] [2020-11-28 07:36:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:54,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436958249] [2020-11-28 07:36:54,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:54,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:54,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212516795] [2020-11-28 07:36:54,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:54,251 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-11-28 07:36:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:54,348 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-28 07:36:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:36:54,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:36:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:54,349 INFO L225 Difference]: With dead ends: 38 [2020-11-28 07:36:54,350 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 07:36:54,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:36:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 07:36:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2020-11-28 07:36:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:36:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 07:36:54,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-28 07:36:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:54,355 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 07:36:54,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 07:36:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:36:54,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:54,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:54,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:36:54,356 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash 694595734, now seen corresponding path program 1 times [2020-11-28 07:36:54,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:54,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373245510] [2020-11-28 07:36:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:54,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373245510] [2020-11-28 07:36:54,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054439627] [2020-11-28 07:36:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/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 [2020-11-28 07:36:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:36:54,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:54,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:54,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727927502] [2020-11-28 07:36:54,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:36:54,559 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:36:54,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:36:54,571 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:36:54,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:36:54,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:54,978 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:36:55,278 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-11-28 07:36:55,584 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-11-28 07:36:55,849 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-11-28 07:36:55,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:55,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-11-28 07:36:55,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442969316] [2020-11-28 07:36:55,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:36:55,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:55,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:36:55,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:36:55,854 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-11-28 07:36:56,130 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-11-28 07:36:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:56,237 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-11-28 07:36:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:36:56,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 07:36:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:56,241 INFO L225 Difference]: With dead ends: 26 [2020-11-28 07:36:56,241 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 07:36:56,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:36:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 07:36:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-28 07:36:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:36:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-11-28 07:36:56,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2020-11-28 07:36:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:56,245 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-28 07:36:56,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:36:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-11-28 07:36:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:36:56,246 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:56,246 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-28 07:36:56,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:56,458 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash 694522633, now seen corresponding path program 1 times [2020-11-28 07:36:56,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:56,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17789656] [2020-11-28 07:36:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:56,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17789656] [2020-11-28 07:36:56,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660957322] [2020-11-28 07:36:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/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 [2020-11-28 07:36:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:36:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:56,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:56,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145407165] [2020-11-28 07:36:56,609 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:36:56,610 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:36:56,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:36:56,610 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:36:56,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:36:56,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:56,793 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:36:57,145 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-11-28 07:36:57,444 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-11-28 07:36:57,773 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2020-11-28 07:36:58,036 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-11-28 07:36:58,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:58,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-11-28 07:36:58,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873762690] [2020-11-28 07:36:58,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:36:58,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:36:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:36:58,039 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-11-28 07:36:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:58,161 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-11-28 07:36:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:36:58,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-28 07:36:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:58,163 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:36:58,163 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:36:58,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:36:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:36:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 07:36:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:36:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-28 07:36:58,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-11-28 07:36:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:58,167 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-28 07:36:58,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:36:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-28 07:36:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:58,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:58,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:58,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 07:36:58,379 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1666401205, now seen corresponding path program 1 times [2020-11-28 07:36:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:58,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967962275] [2020-11-28 07:36:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967962275] [2020-11-28 07:36:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050619333] [2020-11-28 07:36:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/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 [2020-11-28 07:36:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:36:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:58,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:36:58,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985543123] [2020-11-28 07:36:58,598 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:36:58,598 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:36:58,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:36:58,599 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:36:58,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:36:58,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:58,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:58,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:59,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:59,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:59,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:59,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:59,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:36:59,529 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:36:59,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:36:59,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2020-11-28 07:36:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168133398] [2020-11-28 07:36:59,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:36:59,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:36:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:36:59,532 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-11-28 07:36:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:59,720 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-11-28 07:36:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:36:59,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-11-28 07:36:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:59,722 INFO L225 Difference]: With dead ends: 59 [2020-11-28 07:36:59,722 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 07:36:59,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 07:36:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-11-28 07:36:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 07:36:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-11-28 07:36:59,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 10 [2020-11-28 07:36:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:59,730 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-11-28 07:36:59,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:36:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-11-28 07:36:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:36:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:59,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:59,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-28 07:36:59,932 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:36:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1666399236, now seen corresponding path program 1 times [2020-11-28 07:36:59,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:59,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933436990] [2020-11-28 07:36:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:00,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933436990] [2020-11-28 07:37:00,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914282493] [2020-11-28 07:37:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:00,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:37:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:00,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:00,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233956679] [2020-11-28 07:37:00,134 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:00,136 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:00,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:00,138 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:00,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:00,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:00,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:01,064 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:37:01,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:01,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-11-28 07:37:01,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418909080] [2020-11-28 07:37:01,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:37:01,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:37:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:37:01,066 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 10 states. [2020-11-28 07:37:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:01,279 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-11-28 07:37:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:37:01,279 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-11-28 07:37:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:01,280 INFO L225 Difference]: With dead ends: 53 [2020-11-28 07:37:01,280 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 07:37:01,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:37:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 07:37:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-11-28 07:37:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:37:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-11-28 07:37:01,286 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2020-11-28 07:37:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:01,286 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-11-28 07:37:01,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:37:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-11-28 07:37:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:37:01,287 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:01,287 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 07:37:01,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:01,501 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:37:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:01,501 INFO L82 PathProgramCache]: Analyzing trace with hash -499405208, now seen corresponding path program 2 times [2020-11-28 07:37:01,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:01,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273420637] [2020-11-28 07:37:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:37:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273420637] [2020-11-28 07:37:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652652306] [2020-11-28 07:37:01,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:01,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:37:01,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:37:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:37:01,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:37:01,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064232416] [2020-11-28 07:37:01,745 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:01,745 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:01,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:01,745 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:01,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:01,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:01,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:01,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:02,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:02,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:02,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:02,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:02,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:02,561 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:37:02,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:02,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-11-28 07:37:02,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18809706] [2020-11-28 07:37:02,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:37:02,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:02,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:37:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:02,563 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 11 states. [2020-11-28 07:37:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:02,792 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-11-28 07:37:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:37:02,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-11-28 07:37:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:02,794 INFO L225 Difference]: With dead ends: 48 [2020-11-28 07:37:02,794 INFO L226 Difference]: Without dead ends: 48 [2020-11-28 07:37:02,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:37:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-28 07:37:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-11-28 07:37:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 07:37:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-11-28 07:37:02,799 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2020-11-28 07:37:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:02,799 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-11-28 07:37:02,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:37:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-11-28 07:37:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:37:02,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:02,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-11-28 07:37:03,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-28 07:37:03,015 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:37:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560043, now seen corresponding path program 1 times [2020-11-28 07:37:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:03,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591890186] [2020-11-28 07:37:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:37:03,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591890186] [2020-11-28 07:37:03,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025802203] [2020-11-28 07:37:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:37:03,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:37:03,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:37:03,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969512946] [2020-11-28 07:37:03,185 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:03,185 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:03,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:03,186 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:03,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:03,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:03,796 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:37:03,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:03,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2020-11-28 07:37:03,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489857627] [2020-11-28 07:37:03,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:37:03,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:37:03,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:03,798 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 7 states. [2020-11-28 07:37:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:03,829 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-28 07:37:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:37:03,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-28 07:37:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:03,830 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:37:03,830 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 07:37:03,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 07:37:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-28 07:37:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 07:37:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-11-28 07:37:03,834 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2020-11-28 07:37:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:03,834 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-11-28 07:37:03,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:37:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-11-28 07:37:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:37:03,836 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:03,836 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-11-28 07:37:04,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-28 07:37:04,051 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:37:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560044, now seen corresponding path program 1 times [2020-11-28 07:37:04,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:04,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034867511] [2020-11-28 07:37:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:37:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034867511] [2020-11-28 07:37:04,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277423821] [2020-11-28 07:37:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 07:37:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:37:04,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:37:04,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415562802] [2020-11-28 07:37:04,228 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:04,228 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:04,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:04,229 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:04,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:04,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:04,884 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:37:04,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:04,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:37:04,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153963647] [2020-11-28 07:37:04,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:37:04,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:37:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:37:04,886 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-11-28 07:37:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:04,975 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-11-28 07:37:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:04,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-28 07:37:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:04,977 INFO L225 Difference]: With dead ends: 68 [2020-11-28 07:37:04,977 INFO L226 Difference]: Without dead ends: 68 [2020-11-28 07:37:04,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:37:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-28 07:37:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-11-28 07:37:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:37:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-11-28 07:37:04,982 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2020-11-28 07:37:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:04,982 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-11-28 07:37:04,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:37:04,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-11-28 07:37:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:37:04,986 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:04,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-11-28 07:37:05,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-11-28 07:37:05,188 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:37:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:05,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1842774988, now seen corresponding path program 2 times [2020-11-28 07:37:05,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:05,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608248466] [2020-11-28 07:37:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 07:37:05,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608248466] [2020-11-28 07:37:05,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632600520] [2020-11-28 07:37:05,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:05,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:37:05,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-28 07:37:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 07:37:05,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 07:37:05,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311811271] [2020-11-28 07:37:05,592 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-28 07:37:05,592 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:05,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:05,593 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:05,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:05,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:05,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:05,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:06,395 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:37:06,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:06,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2020-11-28 07:37:06,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082799254] [2020-11-28 07:37:06,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 07:37:06,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 07:37:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:37:06,397 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 14 states. [2020-11-28 07:37:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:07,109 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-11-28 07:37:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 07:37:07,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-11-28 07:37:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:07,110 INFO L225 Difference]: With dead ends: 65 [2020-11-28 07:37:07,111 INFO L226 Difference]: Without dead ends: 65 [2020-11-28 07:37:07,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=630, Unknown=0, NotChecked=0, Total=930 [2020-11-28 07:37:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-28 07:37:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-11-28 07:37:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-28 07:37:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-28 07:37:07,115 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2020-11-28 07:37:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:07,115 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-28 07:37:07,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 07:37:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-28 07:37:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 07:37:07,116 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:07,116 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:07,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2020-11-28 07:37:07,328 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:37:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 688991571, now seen corresponding path program 1 times [2020-11-28 07:37:07,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:07,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241233821] [2020-11-28 07:37:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 07:37:07,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241233821] [2020-11-28 07:37:07,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442672460] [2020-11-28 07:37:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:37:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:37:07,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:37:07,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739431350] [2020-11-28 07:37:07,536 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-28 07:37:07,537 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:37:07,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:37:07,537 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:37:07,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:37:07,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:07,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:07,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:37:08,230 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:37:08,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:37:08,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2020-11-28 07:37:08,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866682750] [2020-11-28 07:37:08,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:37:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:08,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:37:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:08,233 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 11 states. [2020-11-28 07:37:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:08,470 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-11-28 07:37:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 07:37:08,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-28 07:37:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:08,472 INFO L225 Difference]: With dead ends: 52 [2020-11-28 07:37:08,472 INFO L226 Difference]: Without dead ends: 52 [2020-11-28 07:37:08,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:37:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-28 07:37:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-11-28 07:37:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 07:37:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-11-28 07:37:08,476 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2020-11-28 07:37:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:08,476 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-11-28 07:37:08,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:37:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-11-28 07:37:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 07:37:08,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:08,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:08,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:08,691 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:37:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash -359526703, now seen corresponding path program 2 times [2020-11-28 07:37:08,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:08,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107840451] [2020-11-28 07:37:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 07:37:08,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107840451] [2020-11-28 07:37:08,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301267063] [2020-11-28 07:37:08,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:08,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:37:08,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:37:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:37:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-28 07:37:08,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-28 07:37:08,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:37:08,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6] total 10 [2020-11-28 07:37:08,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060894918] [2020-11-28 07:37:08,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:37:08,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:37:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:08,921 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2020-11-28 07:37:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:08,949 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-11-28 07:37:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:08,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-11-28 07:37:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:08,951 INFO L225 Difference]: With dead ends: 43 [2020-11-28 07:37:08,951 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:37:08,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:37:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:37:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:37:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:37:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:37:08,952 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-11-28 07:37:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:08,952 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:37:08,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:37:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:37:08,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:37:09,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:09,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:37:09 BoogieIcfgContainer [2020-11-28 07:37:09,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:37:09,158 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:37:09,158 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:37:09,158 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:37:09,159 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:53" (3/4) ... [2020-11-28 07:37:09,162 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:37:09,175 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-11-28 07:37:09,175 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-28 07:37:09,176 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:37:09,227 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0ffaf6b9-5f60-4f13-b21b-acbb254f6124/bin/utaipan/witness.graphml [2020-11-28 07:37:09,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:37:09,228 INFO L168 Benchmark]: Toolchain (without parser) took 16644.42 ms. Allocated memory was 102.8 MB in the beginning and 262.1 MB in the end (delta: 159.4 MB). Free memory was 75.1 MB in the beginning and 89.9 MB in the end (delta: -14.8 MB). Peak memory consumption was 144.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:09,229 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 102.8 MB. Free memory is still 59.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:09,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.95 ms. Allocated memory is still 102.8 MB. Free memory was 74.8 MB in the beginning and 80.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:09,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.08 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 79.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:09,230 INFO L168 Benchmark]: Boogie Preprocessor took 35.56 ms. Allocated memory is still 102.8 MB. Free memory was 79.3 MB in the beginning and 78.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:09,230 INFO L168 Benchmark]: RCFGBuilder took 621.94 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 57.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:09,231 INFO L168 Benchmark]: TraceAbstraction took 15613.74 ms. Allocated memory was 102.8 MB in the beginning and 262.1 MB in the end (delta: 159.4 MB). Free memory was 56.6 MB in the beginning and 92.0 MB in the end (delta: -35.4 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:09,231 INFO L168 Benchmark]: Witness Printer took 69.43 ms. Allocated memory is still 262.1 MB. Free memory was 92.0 MB in the beginning and 89.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:09,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 102.8 MB. Free memory is still 59.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 242.95 ms. Allocated memory is still 102.8 MB. Free memory was 74.8 MB in the beginning and 80.5 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.08 ms. Allocated memory is still 102.8 MB. Free memory was 80.5 MB in the beginning and 79.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.56 ms. Allocated memory is still 102.8 MB. Free memory was 79.3 MB in the beginning and 78.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 621.94 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 57.0 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15613.74 ms. Allocated memory was 102.8 MB in the beginning and 262.1 MB in the end (delta: 159.4 MB). Free memory was 56.6 MB in the beginning and 92.0 MB in the end (delta: -35.4 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. * Witness Printer took 69.43 ms. Allocated memory is still 262.1 MB. Free memory was 92.0 MB in the beginning and 89.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.5s, OverallIterations: 14, TraceHistogramMax: 5, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 466 SDslu, 136 SDs, 0 SdLazy, 707 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 397 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, 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, 14 MinimizatonAttempts, 112 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 326 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 447 ConstructedInterpolants, 1 QuantifiedInterpolants, 64926 SizeOfPredicates, 35 NumberOfNonLiveVariables, 883 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 372/582 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 604, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 21, TOOLS_POST_TIME[ms]: 401, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 21, TOOLS_QUANTIFIERELIM_TIME[ms]: 389, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 89, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 43, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 111, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 17, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 14, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 400, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 399, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 13, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 42, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...