./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a99c5e1922c5e2d2ce50e982def02dab2dbd81e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-01 17:20:00,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 17:20:00,774 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 17:20:00,780 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 17:20:00,781 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 17:20:00,781 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 17:20:00,782 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 17:20:00,783 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 17:20:00,783 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 17:20:00,784 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 17:20:00,784 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 17:20:00,784 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 17:20:00,785 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 17:20:00,785 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 17:20:00,786 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 17:20:00,786 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 17:20:00,787 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 17:20:00,787 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 17:20:00,788 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 17:20:00,789 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 17:20:00,790 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 17:20:00,790 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 17:20:00,791 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 17:20:00,791 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 17:20:00,791 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 17:20:00,792 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 17:20:00,792 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 17:20:00,793 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 17:20:00,793 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 17:20:00,794 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 17:20:00,794 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 17:20:00,794 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 17:20:00,794 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 17:20:00,794 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 17:20:00,795 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 17:20:00,795 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 17:20:00,795 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 17:20:00,802 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 17:20:00,802 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 17:20:00,803 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 17:20:00,803 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 17:20:00,803 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 17:20:00,803 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 17:20:00,803 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 17:20:00,803 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 17:20:00,804 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 17:20:00,804 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 17:20:00,805 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 17:20:00,805 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/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(__VERIFIER_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 -> 2a99c5e1922c5e2d2ce50e982def02dab2dbd81e [2018-12-01 17:20:00,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 17:20:00,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 17:20:00,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 17:20:00,835 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 17:20:00,835 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 17:20:00,836 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i [2018-12-01 17:20:00,880 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/data/5286785ee/393258ac08fb4832b108d47bdcc10f06/FLAG3d5f9ffa6 [2018-12-01 17:20:01,308 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 17:20:01,308 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i [2018-12-01 17:20:01,314 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/data/5286785ee/393258ac08fb4832b108d47bdcc10f06/FLAG3d5f9ffa6 [2018-12-01 17:20:01,324 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/data/5286785ee/393258ac08fb4832b108d47bdcc10f06 [2018-12-01 17:20:01,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 17:20:01,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 17:20:01,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 17:20:01,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 17:20:01,330 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 17:20:01,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2ac224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01, skipping insertion in model container [2018-12-01 17:20:01,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 17:20:01,360 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 17:20:01,521 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 17:20:01,526 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 17:20:01,588 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 17:20:01,618 INFO L195 MainTranslator]: Completed translation [2018-12-01 17:20:01,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01 WrapperNode [2018-12-01 17:20:01,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 17:20:01,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 17:20:01,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 17:20:01,619 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 17:20:01,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 17:20:01,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 17:20:01,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 17:20:01,640 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 17:20:01,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... [2018-12-01 17:20:01,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 17:20:01,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 17:20:01,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 17:20:01,658 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 17:20:01,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/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 [2018-12-01 17:20:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-01 17:20:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-01 17:20:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2018-12-01 17:20:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2018-12-01 17:20:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 17:20:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2018-12-01 17:20:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2018-12-01 17:20:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2018-12-01 17:20:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2018-12-01 17:20:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 17:20:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 17:20:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 17:20:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 17:20:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-01 17:20:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-01 17:20:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 17:20:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 17:20:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 17:20:01,833 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 17:20:01,834 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 17:20:01,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:20:01 BoogieIcfgContainer [2018-12-01 17:20:01,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 17:20:01,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 17:20:01,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 17:20:01,836 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 17:20:01,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 05:20:01" (1/3) ... [2018-12-01 17:20:01,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe11b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 05:20:01, skipping insertion in model container [2018-12-01 17:20:01,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:20:01" (2/3) ... [2018-12-01 17:20:01,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe11b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 05:20:01, skipping insertion in model container [2018-12-01 17:20:01,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:20:01" (3/3) ... [2018-12-01 17:20:01,838 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check_false-unreach-call_false-valid-memcleanup.i [2018-12-01 17:20:01,844 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 17:20:01,849 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 17:20:01,858 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 17:20:01,876 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 17:20:01,876 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 17:20:01,876 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 17:20:01,876 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 17:20:01,876 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 17:20:01,876 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 17:20:01,876 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 17:20:01,876 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 17:20:01,877 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 17:20:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-12-01 17:20:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-01 17:20:01,892 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:01,893 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:01,895 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:01,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1672852016, now seen corresponding path program 1 times [2018-12-01 17:20:01,899 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:01,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:01,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:01,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:20:01,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 17:20:01,978 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 17:20:01,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-01 17:20:01,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-01 17:20:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-01 17:20:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-01 17:20:01,990 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-12-01 17:20:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:20:02,004 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2018-12-01 17:20:02,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 17:20:02,005 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-12-01 17:20:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:20:02,010 INFO L225 Difference]: With dead ends: 73 [2018-12-01 17:20:02,010 INFO L226 Difference]: Without dead ends: 28 [2018-12-01 17:20:02,012 INFO L631 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 [2018-12-01 17:20:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-01 17:20:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-01 17:20:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-01 17:20:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-12-01 17:20:02,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2018-12-01 17:20:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:20:02,033 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-12-01 17:20:02,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-01 17:20:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-12-01 17:20:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 17:20:02,034 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:02,034 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:02,034 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:02,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1285366475, now seen corresponding path program 1 times [2018-12-01 17:20:02,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:02,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:02,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:20:02,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 17:20:02,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 17:20:02,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 17:20:02,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 17:20:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 17:20:02,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 17:20:02,094 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2018-12-01 17:20:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:20:02,121 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-12-01 17:20:02,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 17:20:02,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-12-01 17:20:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:20:02,122 INFO L225 Difference]: With dead ends: 45 [2018-12-01 17:20:02,122 INFO L226 Difference]: Without dead ends: 31 [2018-12-01 17:20:02,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 17:20:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-01 17:20:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-12-01 17:20:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-01 17:20:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-12-01 17:20:02,126 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2018-12-01 17:20:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:20:02,126 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-12-01 17:20:02,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 17:20:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-12-01 17:20:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-01 17:20:02,127 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:02,127 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:02,127 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:02,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash 857903227, now seen corresponding path program 1 times [2018-12-01 17:20:02,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:02,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:02,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:20:02,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 17:20:02,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 17:20:02,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-01 17:20:02,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 17:20:02,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 17:20:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-01 17:20:02,195 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2018-12-01 17:20:02,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:20:02,249 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-12-01 17:20:02,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 17:20:02,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-12-01 17:20:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:20:02,250 INFO L225 Difference]: With dead ends: 39 [2018-12-01 17:20:02,250 INFO L226 Difference]: Without dead ends: 32 [2018-12-01 17:20:02,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-12-01 17:20:02,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-01 17:20:02,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-01 17:20:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 17:20:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-12-01 17:20:02,254 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2018-12-01 17:20:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:20:02,254 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2018-12-01 17:20:02,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 17:20:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2018-12-01 17:20:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-01 17:20:02,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:02,254 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:02,255 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:02,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1051029791, now seen corresponding path program 1 times [2018-12-01 17:20:02,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:02,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:02,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:20:02,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 17:20:02,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:20:02,290 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:20:02,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:20:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:02,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:20:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 17:20:02,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:20:02,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-01 17:20:02,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 17:20:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 17:20:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 17:20:02,357 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2018-12-01 17:20:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:20:02,387 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-12-01 17:20:02,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 17:20:02,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-12-01 17:20:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:20:02,387 INFO L225 Difference]: With dead ends: 50 [2018-12-01 17:20:02,387 INFO L226 Difference]: Without dead ends: 35 [2018-12-01 17:20:02,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-01 17:20:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-01 17:20:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-12-01 17:20:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-01 17:20:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-12-01 17:20:02,391 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2018-12-01 17:20:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:20:02,391 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-12-01 17:20:02,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 17:20:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-12-01 17:20:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-01 17:20:02,391 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:02,391 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:02,392 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:02,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 669200167, now seen corresponding path program 2 times [2018-12-01 17:20:02,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:02,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 17:20:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 17:20:02,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:20:02,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:20:02,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 17:20:02,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 17:20:02,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:20:02,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:20:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 17:20:02,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:20:02,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2018-12-01 17:20:02,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 17:20:02,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 17:20:02,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-12-01 17:20:02,612 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 16 states. [2018-12-01 17:20:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:20:02,837 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-12-01 17:20:02,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 17:20:02,837 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2018-12-01 17:20:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:20:02,838 INFO L225 Difference]: With dead ends: 57 [2018-12-01 17:20:02,838 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 17:20:02,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2018-12-01 17:20:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 17:20:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-01 17:20:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-01 17:20:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-12-01 17:20:02,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2018-12-01 17:20:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:20:02,844 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-12-01 17:20:02,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 17:20:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-12-01 17:20:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-01 17:20:02,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:02,845 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:02,845 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:02,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash 432067323, now seen corresponding path program 3 times [2018-12-01 17:20:02,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:02,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:20:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 17:20:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-01 17:20:02,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 17:20:02,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 17:20:02,931 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 17:20:02,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-01 17:20:02,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 17:20:02,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 17:20:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-01 17:20:03,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 17:20:03,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-01 17:20:03,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 17:20:03,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 17:20:03,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-01 17:20:03,007 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states. [2018-12-01 17:20:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 17:20:03,058 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-12-01 17:20:03,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 17:20:03,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-12-01 17:20:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 17:20:03,060 INFO L225 Difference]: With dead ends: 55 [2018-12-01 17:20:03,061 INFO L226 Difference]: Without dead ends: 51 [2018-12-01 17:20:03,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-01 17:20:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-01 17:20:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-12-01 17:20:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-01 17:20:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2018-12-01 17:20:03,071 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2018-12-01 17:20:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 17:20:03,072 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2018-12-01 17:20:03,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 17:20:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2018-12-01 17:20:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-01 17:20:03,073 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 17:20:03,073 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 17:20:03,074 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 17:20:03,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 17:20:03,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1367040927, now seen corresponding path program 4 times [2018-12-01 17:20:03,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 17:20:03,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 17:20:03,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:03,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 17:20:03,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 17:20:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 17:20:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 17:20:03,122 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 17:20:03,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 05:20:03 BoogieIcfgContainer [2018-12-01 17:20:03,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 17:20:03,152 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 17:20:03,152 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 17:20:03,152 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 17:20:03,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:20:01" (3/4) ... [2018-12-01 17:20:03,155 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 17:20:03,193 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d3d0160f-f04f-4b56-bd5a-0ae536743280/bin-2019/uautomizer/witness.graphml [2018-12-01 17:20:03,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 17:20:03,194 INFO L168 Benchmark]: Toolchain (without parser) took 1866.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 951.7 MB in the beginning and 853.6 MB in the end (delta: 98.1 MB). Peak memory consumption was 235.5 MB. Max. memory is 11.5 GB. [2018-12-01 17:20:03,194 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:20:03,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -169.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 11.5 GB. [2018-12-01 17:20:03,195 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:20:03,195 INFO L168 Benchmark]: Boogie Preprocessor took 17.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 17:20:03,195 INFO L168 Benchmark]: RCFGBuilder took 176.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. [2018-12-01 17:20:03,196 INFO L168 Benchmark]: TraceAbstraction took 1317.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 857.0 MB in the end (delta: 242.8 MB). Peak memory consumption was 242.8 MB. Max. memory is 11.5 GB. [2018-12-01 17:20:03,196 INFO L168 Benchmark]: Witness Printer took 41.08 ms. Allocated memory is still 1.2 GB. Free memory was 857.0 MB in the beginning and 853.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2018-12-01 17:20:03,197 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 290.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -169.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 176.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1317.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 857.0 MB in the end (delta: 242.8 MB). Peak memory consumption was 242.8 MB. Max. memory is 11.5 GB. * Witness Printer took 41.08 ms. Allocated memory is still 1.2 GB. Free memory was 857.0 MB in the beginning and 853.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; VAL [len=2] [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L564] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={5:0}, new_head={5:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={5:0}, new_head={5:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={5:0}, len=2, malloc(sizeof(struct node))={5:0}, new_head={5:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={5:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={5:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={7:0}, new_head={7:0}] [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={8:0}, new_head={8:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={8:0}, new_head={8:0}] [L570] new_head->next = head [L571] head = new_head [L572] len-- VAL [\old(len)=3, head={8:0}, len=0, malloc(sizeof(struct node))={8:0}, new_head={8:0}] [L565] COND FALSE !(len > 0) VAL [\old(len)=3, head={8:0}, len=0, malloc(sizeof(struct node))={8:0}, new_head={8:0}] [L574] return head; VAL [\old(len)=3, \result={8:0}, head={8:0}, len=0, malloc(sizeof(struct node))={8:0}, new_head={8:0}] [L596] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={8:0}] [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) VAL [head={8:0}] [L577] int len = 0; VAL [head={8:0}, head={8:0}, len=0] [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) VAL [head={0:0}, head={8:0}, len=3] [L582] return len; VAL [\result=3, head={0:0}, head={8:0}, len=3] [L597] RET, EXPR sll_length(s) VAL [len=2, s={8:0}, sll_length(s)=3] [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() VAL [len=2, s={8:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 43 locations, 1 error locations. UNSAFE Result, 1.2s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 169 SDtfs, 79 SDslu, 708 SDs, 0 SdLazy, 413 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 307 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 261 ConstructedInterpolants, 0 QuantifiedInterpolants, 20294 SizeOfPredicates, 6 NumberOfNonLiveVariables, 388 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 30/47 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...