./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4817866b64d47a0885045d682a213ce065b00b0f ............................................................................................................................................................................................................................................................................................ 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-a4ecdab [2020-11-30 01:31:53,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:31:53,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:31:53,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:31:53,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:31:53,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:31:53,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:31:53,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:31:53,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:31:53,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:31:53,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:31:53,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:31:53,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:31:53,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:31:53,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:31:53,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:31:53,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:31:53,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:31:53,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:31:53,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:31:53,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:31:53,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:31:53,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:31:53,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:31:53,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:31:53,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:31:53,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:31:53,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:31:53,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:31:53,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:31:53,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:31:53,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:31:53,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:31:53,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:31:53,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:31:53,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:31:53,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:31:53,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:31:53,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:31:53,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:31:53,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:31:53,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:31:53,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:31:53,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:31:53,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:31:53,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:31:53,877 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:31:53,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:31:53,878 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:31:53,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:31:53,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:31:53,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:31:53,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:31:53,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:31:53,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:31:53,881 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:31:53,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:31:53,882 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:31:53,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:31:53,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:31:53,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:31:53,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:31:53,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:31:53,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:31:53,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:31:53,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:31:53,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:31:53,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:31:53,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:31:53,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:31:53,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:31:53,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4817866b64d47a0885045d682a213ce065b00b0f [2020-11-30 01:31:54,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:31:54,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:31:54,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:31:54,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:31:54,285 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:31:54,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/../../sv-benchmarks/c/forester-heap/sll-optional-2.i [2020-11-30 01:31:54,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/data/ae316f842/67ec0b4c6079442c9e175951e4c72af3/FLAGb7a81163a [2020-11-30 01:31:55,161 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:31:55,164 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/sv-benchmarks/c/forester-heap/sll-optional-2.i [2020-11-30 01:31:55,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/data/ae316f842/67ec0b4c6079442c9e175951e4c72af3/FLAGb7a81163a [2020-11-30 01:31:55,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/data/ae316f842/67ec0b4c6079442c9e175951e4c72af3 [2020-11-30 01:31:55,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:31:55,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:31:55,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:31:55,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:31:55,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:31:55,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:31:55" (1/1) ... [2020-11-30 01:31:55,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e48b936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:55, skipping insertion in model container [2020-11-30 01:31:55,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:31:55" (1/1) ... [2020-11-30 01:31:55,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:31:55,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:31:55,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:31:55,921 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:31:56,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:31:56,075 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:31:56,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56 WrapperNode [2020-11-30 01:31:56,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:31:56,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:31:56,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:31:56,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:31:56,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:31:56,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:31:56,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:31:56,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:31:56,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... [2020-11-30 01:31:56,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:31:56,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:31:56,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:31:56,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:31:56,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:31:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:31:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:31:56,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 01:31:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 01:31:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:31:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 01:31:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:31:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:31:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:31:56,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:31:56,997 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:31:56,997 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-30 01:31:57,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:56 BoogieIcfgContainer [2020-11-30 01:31:57,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:31:57,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:31:57,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:31:57,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:31:57,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:31:55" (1/3) ... [2020-11-30 01:31:57,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393e8413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:31:57, skipping insertion in model container [2020-11-30 01:31:57,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:31:56" (2/3) ... [2020-11-30 01:31:57,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393e8413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:31:57, skipping insertion in model container [2020-11-30 01:31:57,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:56" (3/3) ... [2020-11-30 01:31:57,013 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-optional-2.i [2020-11-30 01:31:57,027 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:31:57,032 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:31:57,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:31:57,093 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:31:57,094 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:31:57,094 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:31:57,094 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:31:57,094 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:31:57,095 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:31:57,095 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:31:57,095 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:31:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-30 01:31:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 01:31:57,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:57,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:57,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1626835065, now seen corresponding path program 1 times [2020-11-30 01:31:57,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:57,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412710067] [2020-11-30 01:31:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:31:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:31:57,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412710067] [2020-11-30 01:31:57,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:31:57,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:31:57,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558694837] [2020-11-30 01:31:57,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:31:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:31:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:31:57,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:31:57,448 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-11-30 01:31:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:31:57,471 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2020-11-30 01:31:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:31:57,473 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-30 01:31:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:31:57,513 INFO L225 Difference]: With dead ends: 46 [2020-11-30 01:31:57,513 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 01:31:57,527 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 [2020-11-30 01:31:57,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 01:31:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 01:31:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:31:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-11-30 01:31:57,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2020-11-30 01:31:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:31:57,575 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-11-30 01:31:57,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:31:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-11-30 01:31:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:31:57,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:31:57,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:31:57,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:31:57,578 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:31:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:31:57,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2011352413, now seen corresponding path program 1 times [2020-11-30 01:31:57,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:31:57,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943225058] [2020-11-30 01:31:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:31:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:31:57,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:31:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:31:57,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:31:57,811 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:31:57,811 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:31:57,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:31:57,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:31:57 BoogieIcfgContainer [2020-11-30 01:31:57,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:31:57,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:31:57,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:31:57,857 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:31:57,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:31:56" (3/4) ... [2020-11-30 01:31:57,860 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:31:57,908 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7718fc4f-7e38-4fd8-a3dd-fd234f6d546d/bin/uautomizer/witness.graphml [2020-11-30 01:31:57,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:31:57,911 INFO L168 Benchmark]: Toolchain (without parser) took 2509.02 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 109.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:31:57,917 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 50.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:31:57,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.58 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 109.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:31:57,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.15 ms. Allocated memory is still 144.7 MB. Free memory was 109.8 MB in the beginning and 107.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:31:57,922 INFO L168 Benchmark]: Boogie Preprocessor took 60.48 ms. Allocated memory is still 144.7 MB. Free memory was 107.8 MB in the beginning and 106.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:31:57,923 INFO L168 Benchmark]: RCFGBuilder took 806.55 ms. Allocated memory is still 144.7 MB. Free memory was 106.3 MB in the beginning and 83.2 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:31:57,928 INFO L168 Benchmark]: TraceAbstraction took 853.34 ms. Allocated memory is still 144.7 MB. Free memory was 82.6 MB in the beginning and 111.7 MB in the end (delta: -29.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:31:57,929 INFO L168 Benchmark]: Witness Printer took 52.06 ms. Allocated memory is still 144.7 MB. Free memory was 111.7 MB in the beginning and 109.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:31:57,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 50.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 670.58 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 109.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.15 ms. Allocated memory is still 144.7 MB. Free memory was 109.8 MB in the beginning and 107.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.48 ms. Allocated memory is still 144.7 MB. Free memory was 107.8 MB in the beginning and 106.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 806.55 ms. Allocated memory is still 144.7 MB. Free memory was 106.3 MB in the beginning and 83.2 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 853.34 ms. Allocated memory is still 144.7 MB. Free memory was 82.6 MB in the beginning and 111.7 MB in the end (delta: -29.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 52.06 ms. Allocated memory is still 144.7 MB. Free memory was 111.7 MB in the beginning and 109.6 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: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] COND TRUE __VERIFIER_nondet_int() [L998] head->data = 2 [L998] head->opt = malloc(sizeof(SLL)) [L998] EXPR head->opt [L998] head->opt->next = ((void*)0) [L999] SLL* x = head; [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1004] x = head [L1005] COND TRUE x != ((void*)0) [L1007] EXPR x->data [L1007] EXPR x->data == 2 && x->opt == x [L1007] EXPR x->opt [L1007] EXPR x->data == 2 && x->opt == x [L1007] COND TRUE !(x->data == 2 && x->opt == x) [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-optional-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 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=28occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 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...