./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext.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_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/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 8dfe6e301265e265404ce5be2c9f54235040b69e ....................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:08:11,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:08:11,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:08:11,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:08:11,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:08:11,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:08:11,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:08:11,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:08:11,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:08:11,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:08:11,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:08:11,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:08:11,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:08:11,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:08:11,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:08:11,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:08:11,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:08:11,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:08:11,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:08:11,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:08:11,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:08:11,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:08:11,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:08:11,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:08:11,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:08:11,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:08:11,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:08:11,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:08:11,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:08:11,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:08:11,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:08:11,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:08:11,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:08:11,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:08:11,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:08:11,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:08:11,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:08:11,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:08:11,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:08:11,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:08:11,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:08:11,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 20:08:11,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:08:11,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:08:11,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:08:11,472 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:08:11,472 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:08:11,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:08:11,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:08:11,473 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:08:11,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 20:08:11,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 20:08:11,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:08:11,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:08:11,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:08:11,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:08:11,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:08:11,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:08:11,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:08:11,476 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_c763f08f-12a8-45e3-bc9a-c752201b4284/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dfe6e301265e265404ce5be2c9f54235040b69e [2020-12-09 20:08:11,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:08:11,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:08:11,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:08:11,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:08:11,670 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:08:11,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-12-09 20:08:11,709 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/data/9e495a9aa/15ed0fedfaad4c0caf329a7cb301e4d7/FLAG0cf84e1b1 [2020-12-09 20:08:12,114 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:08:12,115 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-12-09 20:08:12,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/data/9e495a9aa/15ed0fedfaad4c0caf329a7cb301e4d7/FLAG0cf84e1b1 [2020-12-09 20:08:12,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/data/9e495a9aa/15ed0fedfaad4c0caf329a7cb301e4d7 [2020-12-09 20:08:12,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:08:12,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:08:12,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:08:12,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:08:12,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:08:12,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e22324d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12, skipping insertion in model container [2020-12-09 20:08:12,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:08:12,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:08:12,726 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_c763f08f-12a8-45e3-bc9a-c752201b4284/sv-benchmarks/c/list-ext-properties/simple-ext.i[23272,23285] [2020-12-09 20:08:12,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:08:12,736 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:08:12,762 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_c763f08f-12a8-45e3-bc9a-c752201b4284/sv-benchmarks/c/list-ext-properties/simple-ext.i[23272,23285] [2020-12-09 20:08:12,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:08:12,806 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:08:12,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12 WrapperNode [2020-12-09 20:08:12,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:08:12,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:08:12,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:08:12,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:08:12,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:08:12,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:08:12,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:08:12,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:08:12,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... [2020-12-09 20:08:12,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:08:12,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:08:12,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:08:12,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:08:12,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/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 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:08:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:08:12,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:08:13,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:08:13,261 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 20:08:13,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:08:13 BoogieIcfgContainer [2020-12-09 20:08:13,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:08:13,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:08:13,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:08:13,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:08:13,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:08:12" (1/3) ... [2020-12-09 20:08:13,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773ee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:08:13, skipping insertion in model container [2020-12-09 20:08:13,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:08:12" (2/3) ... [2020-12-09 20:08:13,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773ee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:08:13, skipping insertion in model container [2020-12-09 20:08:13,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:08:13" (3/3) ... [2020-12-09 20:08:13,271 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext.i [2020-12-09 20:08:13,283 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:08:13,286 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-09 20:08:13,293 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-09 20:08:13,307 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:08:13,307 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 20:08:13,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:08:13,307 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:08:13,307 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:08:13,307 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:08:13,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:08:13,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:08:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-12-09 20:08:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:08:13,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:08:13,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:08:13,322 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:08:13,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:08:13,325 INFO L82 PathProgramCache]: Analyzing trace with hash 4429763, now seen corresponding path program 1 times [2020-12-09 20:08:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:08:13,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052496448] [2020-12-09 20:08:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:08:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:08:13,439 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 20:08:13,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052496448] [2020-12-09 20:08:13,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:08:13,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:08:13,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395053231] [2020-12-09 20:08:13,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 20:08:13,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:08:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 20:08:13,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:08:13,454 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-12-09 20:08:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:08:13,463 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-12-09 20:08:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 20:08:13,464 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 20:08:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:08:13,470 INFO L225 Difference]: With dead ends: 45 [2020-12-09 20:08:13,470 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 20:08:13,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:08:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 20:08:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-09 20:08:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 20:08:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-09 20:08:13,494 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 4 [2020-12-09 20:08:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:08:13,494 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-09 20:08:13,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 20:08:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-09 20:08:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:08:13,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:08:13,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:08:13,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:08:13,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:08:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:08:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 137396885, now seen corresponding path program 1 times [2020-12-09 20:08:13,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:08:13,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121311487] [2020-12-09 20:08:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:08:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:08:13,544 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 20:08:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121311487] [2020-12-09 20:08:13,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:08:13,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:08:13,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014012616] [2020-12-09 20:08:13,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:08:13,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:08:13,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:08:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:08:13,548 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 4 states. [2020-12-09 20:08:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:08:13,639 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-12-09 20:08:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:08:13,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 20:08:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:08:13,640 INFO L225 Difference]: With dead ends: 56 [2020-12-09 20:08:13,640 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 20:08:13,641 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 20:08:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 20:08:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-12-09 20:08:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 20:08:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-12-09 20:08:13,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 5 [2020-12-09 20:08:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:08:13,646 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-12-09 20:08:13,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:08:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-12-09 20:08:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:08:13,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:08:13,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:08:13,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:08:13,646 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:08:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:08:13,647 INFO L82 PathProgramCache]: Analyzing trace with hash 137396886, now seen corresponding path program 1 times [2020-12-09 20:08:13,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:08:13,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144501511] [2020-12-09 20:08:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:08:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:08:13,692 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 20:08:13,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144501511] [2020-12-09 20:08:13,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:08:13,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:08:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571287155] [2020-12-09 20:08:13,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:08:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:08:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:08:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:08:13,694 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 4 states. [2020-12-09 20:08:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:08:13,774 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-09 20:08:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:08:13,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 20:08:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:08:13,775 INFO L225 Difference]: With dead ends: 59 [2020-12-09 20:08:13,775 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 20:08:13,775 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 20:08:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 20:08:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-12-09 20:08:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 20:08:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-12-09 20:08:13,779 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 5 [2020-12-09 20:08:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:08:13,780 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-12-09 20:08:13,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:08:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-12-09 20:08:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:08:13,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:08:13,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:08:13,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:08:13,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:08:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:08:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1602418075, now seen corresponding path program 1 times [2020-12-09 20:08:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:08:13,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457093850] [2020-12-09 20:08:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:08:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:08:13,817 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 20:08:13,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457093850] [2020-12-09 20:08:13,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:08:13,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:08:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333584177] [2020-12-09 20:08:13,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:08:13,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:08:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:08:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:08:13,819 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 4 states. [2020-12-09 20:08:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:08:13,867 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-12-09 20:08:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:08:13,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 20:08:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:08:13,869 INFO L225 Difference]: With dead ends: 57 [2020-12-09 20:08:13,869 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 20:08:13,869 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 20:08:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 20:08:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-12-09 20:08:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 20:08:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-12-09 20:08:13,875 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 9 [2020-12-09 20:08:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:08:13,875 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-12-09 20:08:13,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:08:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-12-09 20:08:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:08:13,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:08:13,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:08:13,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:08:13,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 20:08:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:08:13,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1862828838, now seen corresponding path program 1 times [2020-12-09 20:08:13,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:08:13,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749221515] [2020-12-09 20:08:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:08:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:08:13,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:08:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:08:13,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:08:13,925 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:08:13,926 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:08:13,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 20:08:13,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:08:13 BoogieIcfgContainer [2020-12-09 20:08:13,942 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:08:13,942 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:08:13,942 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:08:13,942 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:08:13,943 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:08:13" (3/4) ... [2020-12-09 20:08:13,944 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:08:13,969 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c763f08f-12a8-45e3-bc9a-c752201b4284/bin/utaipan/witness.graphml [2020-12-09 20:08:13,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:08:13,970 INFO L168 Benchmark]: Toolchain (without parser) took 1451.87 ms. Allocated memory is still 102.8 MB. Free memory was 71.3 MB in the beginning and 51.2 MB in the end (delta: 20.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:08:13,971 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 71.3 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:08:13,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.47 ms. Allocated memory is still 102.8 MB. Free memory was 71.0 MB in the beginning and 80.6 MB in the end (delta: -9.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:08:13,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.38 ms. Allocated memory is still 102.8 MB. Free memory was 80.6 MB in the beginning and 78.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:08:13,972 INFO L168 Benchmark]: Boogie Preprocessor took 21.16 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:08:13,972 INFO L168 Benchmark]: RCFGBuilder took 403.81 ms. Allocated memory is still 102.8 MB. Free memory was 77.2 MB in the beginning and 45.3 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:08:13,973 INFO L168 Benchmark]: TraceAbstraction took 677.66 ms. Allocated memory is still 102.8 MB. Free memory was 44.5 MB in the beginning and 53.3 MB in the end (delta: -8.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:08:13,973 INFO L168 Benchmark]: Witness Printer took 27.13 ms. Allocated memory is still 102.8 MB. Free memory was 53.3 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:08:13,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 71.3 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.47 ms. Allocated memory is still 102.8 MB. Free memory was 71.0 MB in the beginning and 80.6 MB in the end (delta: -9.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.38 ms. Allocated memory is still 102.8 MB. Free memory was 80.6 MB in the beginning and 78.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.16 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 403.81 ms. Allocated memory is still 102.8 MB. Free memory was 77.2 MB in the beginning and 45.3 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 677.66 ms. Allocated memory is still 102.8 MB. Free memory was 44.5 MB in the beginning and 53.3 MB in the end (delta: -8.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 27.13 ms. Allocated memory is still 102.8 MB. Free memory was 53.3 MB in the beginning and 51.2 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: 551]: 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] int i = 0; [L537] i < 30 && __VERIFIER_nondet_int() [L537] i < 30 && __VERIFIER_nondet_int() [L537] COND FALSE !(i < 30 && __VERIFIER_nondet_int()) [L545] p->h = i [L546] p->n = 0 [L547] p = a [L548] i = 0 [L549] COND TRUE p!=0 [L550] EXPR p->h [L550] COND TRUE p->h != 1 [L551] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 21 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 206 SDslu, 26 SDs, 0 SdLazy, 144 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=3, 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, 4 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...