./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4b28e958de4f654443dbaa4f0a24d91f735460 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:02:28,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:02:28,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:02:28,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:02:28,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:02:28,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:02:28,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:02:28,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:02:28,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:02:28,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:02:28,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:02:28,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:02:28,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:02:28,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:02:28,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:02:28,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:02:28,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:02:28,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:02:28,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:02:28,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:02:28,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:02:28,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:02:28,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:02:28,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:02:28,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:02:28,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:02:28,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:02:28,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:02:28,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:02:28,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:02:28,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:02:28,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:02:28,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:02:28,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:02:28,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:02:28,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:02:28,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:02:28,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:02:28,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:02:28,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:02:28,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:02:28,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 09:02:28,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:02:28,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:02:28,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:02:28,374 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:02:28,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:02:28,374 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:02:28,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:02:28,374 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:02:28,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:02:28,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:02:28,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:02:28,375 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:02:28,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:02:28,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:02:28,375 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:02:28,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 09:02:28,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 09:02:28,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:02:28,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:02:28,376 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 09:02:28,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:02:28,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:02:28,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:02:28,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:02:28,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:02:28,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:02:28,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:02:28,378 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:02:28,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:02:28,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:02:28,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:02:28,379 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_064fab01-b70e-4ed9-bf81-e6f8a28603f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4b28e958de4f654443dbaa4f0a24d91f735460 [2020-12-09 09:02:28,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:02:28,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:02:28,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:02:28,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:02:28,567 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:02:28,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-1.i [2020-12-09 09:02:28,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/data/f1292b4d3/ae5663baeef04345abeeb28144c0581a/FLAGef9a5143c [2020-12-09 09:02:29,032 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:02:29,033 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/sv-benchmarks/c/list-properties/simple-1.i [2020-12-09 09:02:29,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/data/f1292b4d3/ae5663baeef04345abeeb28144c0581a/FLAGef9a5143c [2020-12-09 09:02:29,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/data/f1292b4d3/ae5663baeef04345abeeb28144c0581a [2020-12-09 09:02:29,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:02:29,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:02:29,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:02:29,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:02:29,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:02:29,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e27d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29, skipping insertion in model container [2020-12-09 09:02:29,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:02:29,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:02:29,288 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2020-12-09 09:02:29,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:02:29,298 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:02:29,334 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/sv-benchmarks/c/list-properties/simple-1.i[23237,23250] [2020-12-09 09:02:29,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:02:29,381 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:02:29,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29 WrapperNode [2020-12-09 09:02:29,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:02:29,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:02:29,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:02:29,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:02:29,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:02:29,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:02:29,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:02:29,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:02:29,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... [2020-12-09 09:02:29,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:02:29,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:02:29,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:02:29,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:02:29,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/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 [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:02:29,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:02:29,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:02:29,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:02:29,781 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 09:02:29,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:02:29 BoogieIcfgContainer [2020-12-09 09:02:29,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:02:29,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:02:29,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:02:29,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:02:29,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:02:29" (1/3) ... [2020-12-09 09:02:29,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc8f56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:02:29, skipping insertion in model container [2020-12-09 09:02:29,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:02:29" (2/3) ... [2020-12-09 09:02:29,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc8f56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:02:29, skipping insertion in model container [2020-12-09 09:02:29,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:02:29" (3/3) ... [2020-12-09 09:02:29,788 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-12-09 09:02:29,798 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:02:29,800 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 18 error locations. [2020-12-09 09:02:29,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2020-12-09 09:02:29,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:02:29,821 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 09:02:29,821 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:02:29,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:02:29,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:02:29,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:02:29,821 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:02:29,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:02:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-12-09 09:02:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 09:02:29,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:29,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 09:02:29,835 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:29,839 INFO L82 PathProgramCache]: Analyzing trace with hash 116138, now seen corresponding path program 1 times [2020-12-09 09:02:29,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:29,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524600495] [2020-12-09 09:02:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524600495] [2020-12-09 09:02:29,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:29,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:02:29,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119707522] [2020-12-09 09:02:29,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:02:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:02:29,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:02:29,988 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-12-09 09:02:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,030 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-09 09:02:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:02:30,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 09:02:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,039 INFO L225 Difference]: With dead ends: 37 [2020-12-09 09:02:30,040 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 09:02:30,041 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 [2020-12-09 09:02:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 09:02:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 09:02:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 09:02:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-09 09:02:30,064 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 3 [2020-12-09 09:02:30,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,064 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-09 09:02:30,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:02:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-09 09:02:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 09:02:30,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 09:02:30,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:02:30,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash 116139, now seen corresponding path program 1 times [2020-12-09 09:02:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884864868] [2020-12-09 09:02:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884864868] [2020-12-09 09:02:30,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:02:30,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642557871] [2020-12-09 09:02:30,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:02:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:02:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:02:30,103 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 3 states. [2020-12-09 09:02:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,138 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-09 09:02:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:02:30,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 09:02:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,139 INFO L225 Difference]: With dead ends: 33 [2020-12-09 09:02:30,139 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 09:02:30,140 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 [2020-12-09 09:02:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 09:02:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 09:02:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 09:02:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-09 09:02:30,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 3 [2020-12-09 09:02:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,143 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-09 09:02:30,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:02:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-09 09:02:30,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:02:30,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:02:30,144 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash -835111934, now seen corresponding path program 1 times [2020-12-09 09:02:30,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883252164] [2020-12-09 09:02:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883252164] [2020-12-09 09:02:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:02:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364244889] [2020-12-09 09:02:30,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:02:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:02:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:02:30,180 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 4 states. [2020-12-09 09:02:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,271 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-09 09:02:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:02:30,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 09:02:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,273 INFO L225 Difference]: With dead ends: 58 [2020-12-09 09:02:30,273 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 09:02:30,274 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 [2020-12-09 09:02:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 09:02:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2020-12-09 09:02:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 09:02:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-09 09:02:30,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 6 [2020-12-09 09:02:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,280 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-09 09:02:30,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:02:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-09 09:02:30,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:02:30,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 09:02:30,281 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash -835111933, now seen corresponding path program 1 times [2020-12-09 09:02:30,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836287255] [2020-12-09 09:02:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836287255] [2020-12-09 09:02:30,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:02:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360276646] [2020-12-09 09:02:30,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:02:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:02:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:02:30,326 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 4 states. [2020-12-09 09:02:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,395 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-09 09:02:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:02:30,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 09:02:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,397 INFO L225 Difference]: With dead ends: 48 [2020-12-09 09:02:30,397 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 09:02:30,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:02:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 09:02:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2020-12-09 09:02:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 09:02:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-12-09 09:02:30,402 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 6 [2020-12-09 09:02:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,402 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-12-09 09:02:30,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:02:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-12-09 09:02:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 09:02:30,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 09:02:30,403 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1925981582, now seen corresponding path program 1 times [2020-12-09 09:02:30,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287310769] [2020-12-09 09:02:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287310769] [2020-12-09 09:02:30,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:02:30,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654210075] [2020-12-09 09:02:30,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:02:30,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:02:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:02:30,449 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-12-09 09:02:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,484 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-09 09:02:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:02:30,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 09:02:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,485 INFO L225 Difference]: With dead ends: 46 [2020-12-09 09:02:30,485 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 09:02:30,485 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 [2020-12-09 09:02:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 09:02:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-09 09:02:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 09:02:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-09 09:02:30,489 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 9 [2020-12-09 09:02:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,490 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-09 09:02:30,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:02:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-09 09:02:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:02:30,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 09:02:30,491 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -263665026, now seen corresponding path program 1 times [2020-12-09 09:02:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504287498] [2020-12-09 09:02:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504287498] [2020-12-09 09:02:30,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 09:02:30,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296527787] [2020-12-09 09:02:30,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 09:02:30,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 09:02:30,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 09:02:30,558 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 6 states. [2020-12-09 09:02:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,616 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-09 09:02:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:02:30,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 09:02:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,617 INFO L225 Difference]: With dead ends: 48 [2020-12-09 09:02:30,617 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 09:02:30,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:02:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 09:02:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-12-09 09:02:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 09:02:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-09 09:02:30,620 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 11 [2020-12-09 09:02:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,620 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-09 09:02:30,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 09:02:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-09 09:02:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 09:02:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,621 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 09:02:30,621 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1708963074, now seen corresponding path program 1 times [2020-12-09 09:02:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476911157] [2020-12-09 09:02:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476911157] [2020-12-09 09:02:30,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:02:30,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109489789] [2020-12-09 09:02:30,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:02:30,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:02:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:02:30,665 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-12-09 09:02:30,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,726 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-12-09 09:02:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:02:30,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 09:02:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,727 INFO L225 Difference]: With dead ends: 54 [2020-12-09 09:02:30,727 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 09:02:30,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:02:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 09:02:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-12-09 09:02:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 09:02:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 09:02:30,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 12 [2020-12-09 09:02:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,730 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 09:02:30,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:02:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 09:02:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 09:02:30,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,734 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 09:02:30,734 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1708963073, now seen corresponding path program 1 times [2020-12-09 09:02:30,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874439139] [2020-12-09 09:02:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874439139] [2020-12-09 09:02:30,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:02:30,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:02:30,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020461975] [2020-12-09 09:02:30,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 09:02:30,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:30,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 09:02:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:02:30,793 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-12-09 09:02:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:30,896 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-09 09:02:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:02:30,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 09:02:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:30,897 INFO L225 Difference]: With dead ends: 49 [2020-12-09 09:02:30,897 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 09:02:30,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 09:02:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 09:02:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-12-09 09:02:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 09:02:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-09 09:02:30,899 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2020-12-09 09:02:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:30,899 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-09 09:02:30,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 09:02:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-09 09:02:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 09:02:30,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:30,900 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:02:30,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 09:02:30,900 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:30,901 INFO L82 PathProgramCache]: Analyzing trace with hash 21153458, now seen corresponding path program 1 times [2020-12-09 09:02:30,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:30,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855861210] [2020-12-09 09:02:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:30,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855861210] [2020-12-09 09:02:30,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806741701] [2020-12-09 09:02:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/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 [2020-12-09 09:02:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:02:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 09:02:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:02:31,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 09:02:31,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:02:31,087 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:02:31,090 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 09:02:31,090 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:02:31,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:02:31,097 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:02:31,097 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-12-09 09:02:31,144 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 09:02:31,146 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:02:31,150 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:02:31,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-09 09:02:31,153 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 09:02:31,155 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:02:31,156 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:02:31,156 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-09 09:02:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:31,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:02:31,200 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 09:02:31,215 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2020-12-09 09:02:31,217 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-09 09:02:31,235 INFO L625 ElimStorePlain]: treesize reduction 27, result has 34.1 percent of original size [2020-12-09 09:02:31,235 INFO L515 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-12-09 09:02:31,238 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 09:02:31,240 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-12-09 09:02:31,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:22 [2020-12-09 09:02:31,313 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 09:02:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:02:31,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127155789] [2020-12-09 09:02:31,345 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 09:02:31,345 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:02:31,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:02:31,361 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:02:31,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:02:31,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 09:02:31,768 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:02:31,894 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-09 09:02:32,020 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-12-09 09:02:32,162 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-12-09 09:02:32,318 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-12-09 09:02:32,833 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 88 [2020-12-09 09:02:33,125 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 84 [2020-12-09 09:02:33,445 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 88 [2020-12-09 09:02:33,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:02:33,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7, 7] total 19 [2020-12-09 09:02:33,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239364315] [2020-12-09 09:02:33,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 09:02:33,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:02:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 09:02:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-12-09 09:02:33,487 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-12-09 09:02:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:02:33,619 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-09 09:02:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 09:02:33,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-09 09:02:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:02:33,620 INFO L225 Difference]: With dead ends: 46 [2020-12-09 09:02:33,620 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 09:02:33,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-12-09 09:02:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 09:02:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-12-09 09:02:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 09:02:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-09 09:02:33,622 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2020-12-09 09:02:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:02:33,622 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-09 09:02:33,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 09:02:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-09 09:02:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 09:02:33,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:02:33,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:02:33,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-09 09:02:33,825 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:02:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:02:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash 21154563, now seen corresponding path program 1 times [2020-12-09 09:02:33,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:02:33,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920371773] [2020-12-09 09:02:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:02:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:02:33,848 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:02:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:02:33,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:02:33,870 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:02:33,870 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:02:33,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-09 09:02:33,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:02:33 BoogieIcfgContainer [2020-12-09 09:02:33,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:02:33,887 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:02:33,887 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:02:33,887 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:02:33,887 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:02:29" (3/4) ... [2020-12-09 09:02:33,889 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 09:02:33,912 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_064fab01-b70e-4ed9-bf81-e6f8a28603f8/bin/utaipan/witness.graphml [2020-12-09 09:02:33,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:02:33,913 INFO L168 Benchmark]: Toolchain (without parser) took 4857.38 ms. Allocated memory was 94.4 MB in the beginning and 182.5 MB in the end (delta: 88.1 MB). Free memory was 62.7 MB in the beginning and 113.9 MB in the end (delta: -51.2 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,913 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 71.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:02:33,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.67 ms. Allocated memory is still 94.4 MB. Free memory was 62.5 MB in the beginning and 62.5 MB in the end (delta: -16.9 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.78 ms. Allocated memory is still 94.4 MB. Free memory was 62.5 MB in the beginning and 60.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,914 INFO L168 Benchmark]: Boogie Preprocessor took 24.98 ms. Allocated memory is still 94.4 MB. Free memory was 60.5 MB in the beginning and 59.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,914 INFO L168 Benchmark]: RCFGBuilder took 337.20 ms. Allocated memory is still 94.4 MB. Free memory was 59.1 MB in the beginning and 63.6 MB in the end (delta: -4.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,915 INFO L168 Benchmark]: TraceAbstraction took 4102.58 ms. Allocated memory was 94.4 MB in the beginning and 182.5 MB in the end (delta: 88.1 MB). Free memory was 63.1 MB in the beginning and 116.0 MB in the end (delta: -52.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,915 INFO L168 Benchmark]: Witness Printer took 25.28 ms. Allocated memory is still 182.5 MB. Free memory was 116.0 MB in the beginning and 113.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:02:33,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 71.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.67 ms. Allocated memory is still 94.4 MB. Free memory was 62.5 MB in the beginning and 62.5 MB in the end (delta: -16.9 kB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.78 ms. Allocated memory is still 94.4 MB. Free memory was 62.5 MB in the beginning and 60.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.98 ms. Allocated memory is still 94.4 MB. Free memory was 60.5 MB in the beginning and 59.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 337.20 ms. Allocated memory is still 94.4 MB. Free memory was 59.1 MB in the beginning and 63.6 MB in the end (delta: -4.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4102.58 ms. Allocated memory was 94.4 MB in the beginning and 182.5 MB in the end (delta: 88.1 MB). Free memory was 63.1 MB in the beginning and 116.0 MB in the end (delta: -52.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. * Witness Printer took 25.28 ms. Allocated memory is still 182.5 MB. Free memory was 116.0 MB in the beginning and 113.9 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: - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] a->h = 2 [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a [L547] COND TRUE p!=0 [L548] EXPR p->h [L548] COND FALSE !(p->h != 2) [L551] EXPR p->n [L551] p = p->n [L547] COND FALSE !(p!=0) [L553] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 18 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 336 SDslu, 141 SDs, 0 SdLazy, 461 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 73 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 8410 SizeOfPredicates, 8 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 7/10 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]: 423, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 18, TOOLS_POST_TIME[ms]: 249, 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: 18, TOOLS_QUANTIFIERELIM_TIME[ms]: 243, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 61, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 106, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 2, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME[ms]: 18, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 13, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 13, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, 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]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 10, DAG_COMPRESSION_PROCESSED_NODES: 140, DAG_COMPRESSION_RETAINED_NODES: 36, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...