./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext-properties/simple-ext.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext-properties/simple-ext.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --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 --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:30:56,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:30:56,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:30:56,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:30:56,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:30:56,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:30:56,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:30:56,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:30:56,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:30:56,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:30:56,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:30:56,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:30:56,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:30:56,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:30:56,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:30:56,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:30:56,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:30:56,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:30:56,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:30:56,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:30:56,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:30:56,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:30:56,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:30:56,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:30:56,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:30:56,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:30:56,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:30:56,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:30:56,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:30:56,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:30:56,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:30:56,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:30:56,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:30:56,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:30:56,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:30:56,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:30:56,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:30:56,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:30:56,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:30:56,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:30:56,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:30:56,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:30:56,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:30:56,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:30:56,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:30:56,578 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:30:56,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:30:56,578 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:30:56,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:30:56,578 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:30:56,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:30:56,579 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:30:56,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:30:56,579 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:30:56,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:30:56,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:30:56,580 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:30:56,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:30:56,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:30:56,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:30:56,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:30:56,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:30:56,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:30:56,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:30:56,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:30:56,582 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:30:56,582 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:30:56,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:30:56,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:30:56,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:30:56,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:30:56,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:30:56,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:30:56,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:30:56,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:30:56,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:30:56,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:30:56,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:30:56,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:30:56,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:30:56,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:30:56,584 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_ca0502c1-8a85-4367-ac94-47d718aa4b5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dfe6e301265e265404ce5be2c9f54235040b69e [2020-12-09 10:30:56,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:30:56,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:30:56,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:30:56,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:30:56,786 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:30:56,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-12-09 10:30:56,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/data/d60b46673/b722171a3f16424a9605784aa313bbad/FLAG352ad172b [2020-12-09 10:30:57,219 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:30:57,219 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-12-09 10:30:57,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/data/d60b46673/b722171a3f16424a9605784aa313bbad/FLAG352ad172b [2020-12-09 10:30:57,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/data/d60b46673/b722171a3f16424a9605784aa313bbad [2020-12-09 10:30:57,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:30:57,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:30:57,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:30:57,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:30:57,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:30:57,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b19eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57, skipping insertion in model container [2020-12-09 10:30:57,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:30:57,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:30:57,463 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_ca0502c1-8a85-4367-ac94-47d718aa4b5e/sv-benchmarks/c/list-ext-properties/simple-ext.i[23272,23285] [2020-12-09 10:30:57,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:30:57,473 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:30:57,504 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_ca0502c1-8a85-4367-ac94-47d718aa4b5e/sv-benchmarks/c/list-ext-properties/simple-ext.i[23272,23285] [2020-12-09 10:30:57,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:30:57,555 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:30:57,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57 WrapperNode [2020-12-09 10:30:57,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:30:57,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:30:57,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:30:57,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:30:57,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:30:57,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:30:57,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:30:57,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:30:57,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... [2020-12-09 10:30:57,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:30:57,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:30:57,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:30:57,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:30:57,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/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 10:30:57,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 10:30:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 10:30:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 10:30:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 10:30:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:30:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 10:30:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 10:30:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:30:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:30:57,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:30:57,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:30:57,952 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 10:30:57,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:30:57 BoogieIcfgContainer [2020-12-09 10:30:57,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:30:57,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:30:57,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:30:57,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:30:57,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:30:57" (1/3) ... [2020-12-09 10:30:57,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1070416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:30:57, skipping insertion in model container [2020-12-09 10:30:57,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:30:57" (2/3) ... [2020-12-09 10:30:57,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1070416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:30:57, skipping insertion in model container [2020-12-09 10:30:57,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:30:57" (3/3) ... [2020-12-09 10:30:57,961 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext.i [2020-12-09 10:30:57,972 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:30:57,974 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:30:57,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:30:58,005 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:30:58,005 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:30:58,005 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:30:58,005 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:30:58,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:30:58,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:30:58,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:30:58,005 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:30:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-09 10:30:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:30:58,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:30:58,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:30:58,018 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:30:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:30:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2082047597, now seen corresponding path program 1 times [2020-12-09 10:30:58,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:30:58,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524640979] [2020-12-09 10:30:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:30:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:30:58,146 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 10:30:58,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524640979] [2020-12-09 10:30:58,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:30:58,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:30:58,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525042120] [2020-12-09 10:30:58,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 10:30:58,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:30:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 10:30:58,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 10:30:58,161 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-12-09 10:30:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:30:58,171 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2020-12-09 10:30:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 10:30:58,172 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-09 10:30:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:30:58,177 INFO L225 Difference]: With dead ends: 23 [2020-12-09 10:30:58,178 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 10:30:58,179 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 10:30:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 10:30:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 10:30:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 10:30:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 10:30:58,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2020-12-09 10:30:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:30:58,201 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 10:30:58,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 10:30:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 10:30:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:30:58,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:30:58,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:30:58,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:30:58,202 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:30:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:30:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1594481613, now seen corresponding path program 1 times [2020-12-09 10:30:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:30:58,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499876145] [2020-12-09 10:30:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:30:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:30:58,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:30:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:30:58,245 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:30:58,261 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 10:30:58,261 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 10:30:58,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:30:58,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:30:58 BoogieIcfgContainer [2020-12-09 10:30:58,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:30:58,279 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:30:58,279 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:30:58,279 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:30:58,279 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:30:57" (3/4) ... [2020-12-09 10:30:58,280 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 10:30:58,306 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ca0502c1-8a85-4367-ac94-47d718aa4b5e/bin/utaipan/witness.graphml [2020-12-09 10:30:58,306 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:30:58,307 INFO L168 Benchmark]: Toolchain (without parser) took 1066.76 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 44.5 MB in the beginning and 62.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-12-09 10:30:58,308 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 86.0 MB. Free memory is still 61.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:30:58,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.49 ms. Allocated memory is still 86.0 MB. Free memory was 44.2 MB in the beginning and 44.0 MB in the end (delta: 280.2 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:30:58,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.26 ms. Allocated memory is still 86.0 MB. Free memory was 44.0 MB in the beginning and 42.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:30:58,309 INFO L168 Benchmark]: Boogie Preprocessor took 26.26 ms. Allocated memory is still 86.0 MB. Free memory was 42.3 MB in the beginning and 40.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:30:58,309 INFO L168 Benchmark]: RCFGBuilder took 331.02 ms. Allocated memory is still 86.0 MB. Free memory was 40.8 MB in the beginning and 42.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:30:58,310 INFO L168 Benchmark]: TraceAbstraction took 322.68 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 41.8 MB in the beginning and 64.3 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:30:58,310 INFO L168 Benchmark]: Witness Printer took 27.36 ms. Allocated memory is still 104.9 MB. Free memory was 64.3 MB in the beginning and 62.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:30:58,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 86.0 MB. Free memory is still 61.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.49 ms. Allocated memory is still 86.0 MB. Free memory was 44.2 MB in the beginning and 44.0 MB in the end (delta: 280.2 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.26 ms. Allocated memory is still 86.0 MB. Free memory was 44.0 MB in the beginning and 42.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.26 ms. Allocated memory is still 86.0 MB. Free memory was 42.3 MB in the beginning and 40.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 331.02 ms. Allocated memory is still 86.0 MB. Free memory was 40.8 MB in the beginning and 42.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 322.68 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 41.8 MB in the beginning and 64.3 MB in the end (delta: -22.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 27.36 ms. Allocated memory is still 104.9 MB. Free memory was 64.3 MB in the beginning and 62.8 MB in the end (delta: 1.5 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]: a call to reach_error is reachable a call to reach_error is reachable 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, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...