./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/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 0.1.24-cad4683 [2019-11-15 20:14:35,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:14:35,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:14:35,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:14:35,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:14:35,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:14:35,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:14:35,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:14:35,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:14:35,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:14:35,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:14:35,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:14:35,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:14:35,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:14:35,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:14:35,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:14:35,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:14:35,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:14:35,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:14:35,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:14:35,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:14:35,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:14:35,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:14:35,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:14:35,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:14:35,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:14:35,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:14:35,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:14:35,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:14:35,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:14:35,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:14:35,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:14:35,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:14:35,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:14:35,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:14:35,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:14:35,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:14:35,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:14:35,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:14:35,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:14:35,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:14:35,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 20:14:35,173 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:14:35,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:14:35,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:14:35,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:14:35,184 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:14:35,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:14:35,185 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:14:35,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 20:14:35,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:14:35,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:14:35,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:14:35,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:14:35,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:14:35,186 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:14:35,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:14:35,187 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:14:35,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:14:35,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:14:35,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:14:35,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:14:35,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:14:35,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:14:35,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:14:35,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:14:35,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:14:35,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 20:14:35,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 20:14:35,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:14:35,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_512d1f3c-397f-41f2-8b1b-64f037532a7d/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(__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 [2019-11-15 20:14:35,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:14:35,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:14:35,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:14:35,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:14:35,248 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:14:35,248 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2019-11-15 20:14:35,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/data/b3924fac1/e848594022854726a777e0caae78a73c/FLAG31b5f94c5 [2019-11-15 20:14:35,721 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:14:35,722 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2019-11-15 20:14:35,739 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/data/b3924fac1/e848594022854726a777e0caae78a73c/FLAG31b5f94c5 [2019-11-15 20:14:36,024 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/data/b3924fac1/e848594022854726a777e0caae78a73c [2019-11-15 20:14:36,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:14:36,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:14:36,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:14:36,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:14:36,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:14:36,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e22065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36, skipping insertion in model container [2019-11-15 20:14:36,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,048 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:14:36,099 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:14:36,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:14:36,579 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:14:36,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:14:36,684 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:14:36,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36 WrapperNode [2019-11-15 20:14:36,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:14:36,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:14:36,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:14:36,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:14:36,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:14:36,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:14:36,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:14:36,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:14:36,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... [2019-11-15 20:14:36,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:14:36,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:14:36,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:14:36,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:14:36,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/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 [2019-11-15 20:14:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 20:14:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 20:14:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 20:14:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 20:14:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:14:36,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:14:37,113 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:14:37,113 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-15 20:14:37,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:14:37 BoogieIcfgContainer [2019-11-15 20:14:37,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:14:37,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:14:37,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:14:37,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:14:37,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:14:36" (1/3) ... [2019-11-15 20:14:37,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23143b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:14:37, skipping insertion in model container [2019-11-15 20:14:37,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:14:36" (2/3) ... [2019-11-15 20:14:37,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23143b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:14:37, skipping insertion in model container [2019-11-15 20:14:37,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:14:37" (3/3) ... [2019-11-15 20:14:37,127 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2019-11-15 20:14:37,135 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:14:37,141 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:14:37,158 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:14:37,176 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:14:37,177 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:14:37,177 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:14:37,177 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:14:37,177 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:14:37,177 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:14:37,178 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:14:37,178 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:14:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-15 20:14:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 20:14:37,195 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:37,196 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:37,197 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2019-11-15 20:14:37,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:37,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168850103] [2019-11-15 20:14:37,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:14:37,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168850103] [2019-11-15 20:14:37,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:14:37,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 20:14:37,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94368066] [2019-11-15 20:14:37,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 20:14:37,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:14:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 20:14:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:14:37,316 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-15 20:14:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:14:37,331 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-15 20:14:37,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 20:14:37,332 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-15 20:14:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:14:37,340 INFO L225 Difference]: With dead ends: 41 [2019-11-15 20:14:37,341 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 20:14:37,343 INFO L600 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 [2019-11-15 20:14:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 20:14:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-15 20:14:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 20:14:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-15 20:14:37,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2019-11-15 20:14:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:14:37,373 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-15 20:14:37,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 20:14:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-15 20:14:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 20:14:37,375 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:37,375 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:37,375 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2019-11-15 20:14:37,376 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:37,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825823909] [2019-11-15 20:14:37,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:14:37,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825823909] [2019-11-15 20:14:37,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:14:37,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 20:14:37,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223631238] [2019-11-15 20:14:37,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:14:37,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:14:37,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:14:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:14:37,472 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-11-15 20:14:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:14:37,527 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-15 20:14:37,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 20:14:37,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-15 20:14:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:14:37,529 INFO L225 Difference]: With dead ends: 28 [2019-11-15 20:14:37,530 INFO L226 Difference]: Without dead ends: 20 [2019-11-15 20:14:37,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:14:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-15 20:14:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-15 20:14:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-15 20:14:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-15 20:14:37,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2019-11-15 20:14:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:14:37,535 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-15 20:14:37,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:14:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-15 20:14:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:14:37,536 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:37,539 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:37,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2019-11-15 20:14:37,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:37,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227271051] [2019-11-15 20:14:37,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:14:37,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227271051] [2019-11-15 20:14:37,642 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:14:37,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 20:14:37,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920661693] [2019-11-15 20:14:37,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 20:14:37,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:14:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 20:14:37,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 20:14:37,644 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2019-11-15 20:14:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:14:37,731 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-11-15 20:14:37,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 20:14:37,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-15 20:14:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:14:37,733 INFO L225 Difference]: With dead ends: 26 [2019-11-15 20:14:37,733 INFO L226 Difference]: Without dead ends: 21 [2019-11-15 20:14:37,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-15 20:14:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-15 20:14:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-15 20:14:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-15 20:14:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-15 20:14:37,745 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2019-11-15 20:14:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:14:37,745 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-15 20:14:37,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 20:14:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-15 20:14:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 20:14:37,747 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:37,747 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:37,748 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1318509563, now seen corresponding path program 1 times [2019-11-15 20:14:37,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:37,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197268510] [2019-11-15 20:14:37,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:37,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:14:37,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197268510] [2019-11-15 20:14:37,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224342907] [2019-11-15 20:14:37,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:14:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:37,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 20:14:37,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:14:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:14:37,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:14:37,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-15 20:14:37,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326685769] [2019-11-15 20:14:37,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 20:14:37,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:14:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 20:14:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 20:14:37,972 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-11-15 20:14:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:14:38,014 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-15 20:14:38,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 20:14:38,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-15 20:14:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:14:38,015 INFO L225 Difference]: With dead ends: 33 [2019-11-15 20:14:38,015 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 20:14:38,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-15 20:14:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 20:14:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-15 20:14:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 20:14:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-15 20:14:38,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2019-11-15 20:14:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:14:38,022 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-15 20:14:38,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 20:14:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-15 20:14:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 20:14:38,023 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:38,023 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:38,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:14:38,230 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 2 times [2019-11-15 20:14:38,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:38,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607024422] [2019-11-15 20:14:38,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:38,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:38,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:14:38,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607024422] [2019-11-15 20:14:38,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160376633] [2019-11-15 20:14:38,375 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:14:38,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:14:38,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:14:38,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 20:14:38,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:14:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:14:38,546 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:14:38,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-15 20:14:38,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978760590] [2019-11-15 20:14:38,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-15 20:14:38,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:14:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-15 20:14:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-15 20:14:38,548 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 13 states. [2019-11-15 20:14:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:14:38,906 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-15 20:14:38,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 20:14:38,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-15 20:14:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:14:38,909 INFO L225 Difference]: With dead ends: 35 [2019-11-15 20:14:38,909 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 20:14:38,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2019-11-15 20:14:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 20:14:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 20:14:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 20:14:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-15 20:14:38,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2019-11-15 20:14:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:14:38,920 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-15 20:14:38,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-15 20:14:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-15 20:14:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 20:14:38,921 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:38,922 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:39,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:14:39,122 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1344305789, now seen corresponding path program 3 times [2019-11-15 20:14:39,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:39,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389884200] [2019-11-15 20:14:39,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:39,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:39,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:14:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:14:39,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389884200] [2019-11-15 20:14:39,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737555160] [2019-11-15 20:14:39,421 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:14:39,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-15 20:14:39,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:14:39,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 20:14:39,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:14:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-15 20:14:39,666 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:14:39,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-11-15 20:14:39,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140874429] [2019-11-15 20:14:39,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 20:14:39,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:14:39,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 20:14:39,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2019-11-15 20:14:39,668 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 19 states. [2019-11-15 20:14:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:14:40,763 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-11-15 20:14:40,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 20:14:40,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-11-15 20:14:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:14:40,765 INFO L225 Difference]: With dead ends: 61 [2019-11-15 20:14:40,765 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 20:14:40,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 20:14:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 20:14:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 27. [2019-11-15 20:14:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-15 20:14:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-15 20:14:40,777 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2019-11-15 20:14:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:14:40,778 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-15 20:14:40,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 20:14:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-15 20:14:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 20:14:40,781 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:14:40,781 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:14:40,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:14:40,992 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:14:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:14:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2019-11-15 20:14:40,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:14:40,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853598739] [2019-11-15 20:14:40,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:40,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:14:40,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:14:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 20:14:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 20:14:41,110 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 20:14:41,111 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 20:14:41,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 08:14:41 BoogieIcfgContainer [2019-11-15 20:14:41,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 20:14:41,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 20:14:41,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 20:14:41,170 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 20:14:41,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:14:37" (3/4) ... [2019-11-15 20:14:41,173 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 20:14:41,249 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_512d1f3c-397f-41f2-8b1b-64f037532a7d/bin/uautomizer/witness.graphml [2019-11-15 20:14:41,249 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 20:14:41,251 INFO L168 Benchmark]: Toolchain (without parser) took 5222.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 939.4 MB in the beginning and 998.3 MB in the end (delta: -59.0 MB). Peak memory consumption was 97.3 MB. Max. memory is 11.5 GB. [2019-11-15 20:14:41,252 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:14:41,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 656.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -198.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:14:41,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.18 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. [2019-11-15 20:14:41,253 INFO L168 Benchmark]: Boogie Preprocessor took 30.50 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 20:14:41,254 INFO L168 Benchmark]: RCFGBuilder took 346.90 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-15 20:14:41,254 INFO L168 Benchmark]: TraceAbstraction took 4054.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 109.6 MB). Peak memory consumption was 109.6 MB. Max. memory is 11.5 GB. [2019-11-15 20:14:41,255 INFO L168 Benchmark]: Witness Printer took 79.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 998.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-15 20:14:41,258 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 656.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -198.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.18 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 30.50 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 346.90 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4054.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 109.6 MB). Peak memory consumption was 109.6 MB. Max. memory is 11.5 GB. * Witness Printer took 79.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 998.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 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; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] SLL s = sll_create(len + 1); [L577] int 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)) [L582] return len; [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 292 SDslu, 260 SDs, 0 SdLazy, 402 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 35 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 197 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 10730 SizeOfPredicates, 8 NumberOfNonLiveVariables, 278 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 21/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...