./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/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/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 [2019-10-22 08:59:01,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:59:01,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:59:01,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:59:01,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:59:01,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:59:01,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:59:01,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:59:01,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:59:01,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:59:01,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:59:01,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:59:01,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:59:01,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:59:01,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:59:01,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:59:01,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:59:01,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:59:01,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:59:01,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:59:01,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:59:01,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:59:01,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:59:01,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:59:01,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:59:01,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:59:01,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:59:01,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:59:01,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:59:01,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:59:01,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:59:01,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:59:01,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:59:01,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:59:01,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:59:01,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:59:01,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:59:01,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:59:01,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:59:01,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:59:01,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:59:01,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:59:01,708 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:59:01,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:59:01,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:59:01,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:59:01,710 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:59:01,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:59:01,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:59:01,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:59:01,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:59:01,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:59:01,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:59:01,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:59:01,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:59:01,712 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:59:01,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:59:01,712 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:59:01,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:59:01,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:59:01,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:59:01,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:59:01,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:59:01,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:01,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:59:01,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:59:01,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:59:01,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:59:01,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:59:01,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:59:01,714 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/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/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 [2019-10-22 08:59:01,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:59:01,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:59:01,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:59:01,756 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:59:01,756 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:59:01,757 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2019-10-22 08:59:01,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/data/9eecd5d5b/c0218ba478c14a2ea5cbfd1c9acfc0de/FLAG9e60baed2 [2019-10-22 08:59:02,234 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:59:02,235 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2019-10-22 08:59:02,245 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/data/9eecd5d5b/c0218ba478c14a2ea5cbfd1c9acfc0de/FLAG9e60baed2 [2019-10-22 08:59:02,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/data/9eecd5d5b/c0218ba478c14a2ea5cbfd1c9acfc0de [2019-10-22 08:59:02,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:59:02,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:59:02,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:02,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:59:02,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:59:02,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c77ca94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02, skipping insertion in model container [2019-10-22 08:59:02,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,275 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:59:02,306 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:59:02,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:02,622 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:59:02,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:02,700 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:59:02,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02 WrapperNode [2019-10-22 08:59:02,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:02,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:02,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:59:02,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:59:02,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:02,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:59:02,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:59:02,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:59:02,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... [2019-10-22 08:59:02,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:59:02,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:59:02,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:59:02,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:59:02,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/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 [2019-10-22 08:59:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 08:59:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 08:59:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 08:59:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:59:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:59:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:59:03,258 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:59:03,258 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-10-22 08:59:03,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:03 BoogieIcfgContainer [2019-10-22 08:59:03,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:59:03,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:59:03,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:59:03,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:59:03,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:59:02" (1/3) ... [2019-10-22 08:59:03,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c3e975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:03, skipping insertion in model container [2019-10-22 08:59:03,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:02" (2/3) ... [2019-10-22 08:59:03,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c3e975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:03, skipping insertion in model container [2019-10-22 08:59:03,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:03" (3/3) ... [2019-10-22 08:59:03,268 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2019-10-22 08:59:03,277 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:59:03,284 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:59:03,295 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:59:03,322 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:59:03,323 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:59:03,323 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:59:03,324 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:59:03,325 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:59:03,326 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:59:03,326 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:59:03,326 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:59:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 08:59:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 08:59:03,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:03,344 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:03,346 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2019-10-22 08:59:03,360 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:03,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995054815] [2019-10-22 08:59:03,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:03,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995054815] [2019-10-22 08:59:03,452 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:03,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:59:03,453 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142671264] [2019-10-22 08:59:03,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:59:03,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:59:03,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:59:03,466 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-10-22 08:59:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:03,480 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-10-22 08:59:03,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:59:03,481 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-22 08:59:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:03,490 INFO L225 Difference]: With dead ends: 41 [2019-10-22 08:59:03,490 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:59:03,493 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 [2019-10-22 08:59:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:59:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:59:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:59:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-10-22 08:59:03,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2019-10-22 08:59:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:03,524 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-10-22 08:59:03,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:59:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-10-22 08:59:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:59:03,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:03,525 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:03,525 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:03,526 INFO L82 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2019-10-22 08:59:03,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:03,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114773201] [2019-10-22 08:59:03,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:03,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114773201] [2019-10-22 08:59:03,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:03,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:59:03,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893833482] [2019-10-22 08:59:03,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:03,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:03,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:03,595 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-10-22 08:59:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:03,631 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-10-22 08:59:03,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:59:03,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 08:59:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:03,632 INFO L225 Difference]: With dead ends: 28 [2019-10-22 08:59:03,632 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 08:59:03,632 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 [2019-10-22 08:59:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 08:59:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-10-22 08:59:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 08:59:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-10-22 08:59:03,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2019-10-22 08:59:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:03,636 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-10-22 08:59:03,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-10-22 08:59:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:59:03,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:03,636 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:03,637 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2019-10-22 08:59:03,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:03,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934098329] [2019-10-22 08:59:03,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:03,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934098329] [2019-10-22 08:59:03,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:03,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:59:03,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718607380] [2019-10-22 08:59:03,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:59:03,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:59:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:03,739 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2019-10-22 08:59:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:03,801 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-10-22 08:59:03,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:59:03,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-22 08:59:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:03,802 INFO L225 Difference]: With dead ends: 26 [2019-10-22 08:59:03,802 INFO L226 Difference]: Without dead ends: 21 [2019-10-22 08:59:03,803 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 [2019-10-22 08:59:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-22 08:59:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-10-22 08:59:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:59:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 08:59:03,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2019-10-22 08:59:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:03,807 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 08:59:03,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:59:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-10-22 08:59:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 08:59:03,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:03,808 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:03,808 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1318509563, now seen corresponding path program 1 times [2019-10-22 08:59:03,809 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:03,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865340744] [2019-10-22 08:59:03,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:03,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:59:03,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865340744] [2019-10-22 08:59:03,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675525308] [2019-10-22 08:59:03,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/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 [2019-10-22 08:59:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:03,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:59:03,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:59:03,974 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:03,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-22 08:59:03,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834131016] [2019-10-22 08:59:03,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:59:03,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:59:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:03,978 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2019-10-22 08:59:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:04,032 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-10-22 08:59:04,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:59:04,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-22 08:59:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:04,034 INFO L225 Difference]: With dead ends: 33 [2019-10-22 08:59:04,034 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 08:59:04,034 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 [2019-10-22 08:59:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 08:59:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-10-22 08:59:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 08:59:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-22 08:59:04,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2019-10-22 08:59:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:04,043 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-22 08:59:04,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:59:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-22 08:59:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:59:04,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:04,043 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:04,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:04,244 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:04,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 2 times [2019-10-22 08:59:04,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:04,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703801329] [2019-10-22 08:59:04,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:04,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:04,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:04,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703801329] [2019-10-22 08:59:04,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534952866] [2019-10-22 08:59:04,369 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/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 [2019-10-22 08:59:04,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:59:04,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:04,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:59:04,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:59:04,476 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:04,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-22 08:59:04,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619843921] [2019-10-22 08:59:04,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:59:04,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:59:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:59:04,477 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 13 states. [2019-10-22 08:59:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:04,731 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-10-22 08:59:04,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:59:04,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-10-22 08:59:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:04,733 INFO L225 Difference]: With dead ends: 35 [2019-10-22 08:59:04,733 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:59:04,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2019-10-22 08:59:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:59:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 08:59:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:59:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-22 08:59:04,739 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2019-10-22 08:59:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:04,741 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-22 08:59:04,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:59:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-22 08:59:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 08:59:04,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:04,742 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:04,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:04,943 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1344305789, now seen corresponding path program 3 times [2019-10-22 08:59:04,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:04,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689248127] [2019-10-22 08:59:04,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:04,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:04,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:05,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689248127] [2019-10-22 08:59:05,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742068874] [2019-10-22 08:59:05,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/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 [2019-10-22 08:59:05,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-22 08:59:05,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:05,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 08:59:05,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-22 08:59:05,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:05,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-22 08:59:05,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719302713] [2019-10-22 08:59:05,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 08:59:05,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 08:59:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2019-10-22 08:59:05,343 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 19 states. [2019-10-22 08:59:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:06,161 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-10-22 08:59:06,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 08:59:06,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-10-22 08:59:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:06,162 INFO L225 Difference]: With dead ends: 61 [2019-10-22 08:59:06,162 INFO L226 Difference]: Without dead ends: 56 [2019-10-22 08:59:06,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 08:59:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-22 08:59:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 27. [2019-10-22 08:59:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 08:59:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-22 08:59:06,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2019-10-22 08:59:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:06,168 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-22 08:59:06,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 08:59:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-22 08:59:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-22 08:59:06,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:06,169 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:06,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:06,371 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2019-10-22 08:59:06,372 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:06,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552045531] [2019-10-22 08:59:06,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:06,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:06,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:59:06,447 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:59:06,447 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:59:06,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:06 BoogieIcfgContainer [2019-10-22 08:59:06,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:06,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:06,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:06,492 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:06,492 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:03" (3/4) ... [2019-10-22 08:59:06,495 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:59:06,548 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_30780dcc-37b4-493e-b98c-151c129d9ffd/bin/uautomizer/witness.graphml [2019-10-22 08:59:06,548 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:06,550 INFO L168 Benchmark]: Toolchain (without parser) took 4288.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 940.4 MB in the beginning and 971.1 MB in the end (delta: -30.6 MB). Peak memory consumption was 106.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:06,550 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:06,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 438.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:06,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.30 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:06,552 INFO L168 Benchmark]: Boogie Preprocessor took 29.80 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:06,552 INFO L168 Benchmark]: RCFGBuilder took 485.06 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. [2019-10-22 08:59:06,552 INFO L168 Benchmark]: TraceAbstraction took 3230.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.8 MB in the end (delta: 109.0 MB). Peak memory consumption was 109.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:06,553 INFO L168 Benchmark]: Witness Printer took 56.80 ms. Allocated memory is still 1.2 GB. Free memory was 975.8 MB in the beginning and 971.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:06,555 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 960.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 438.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.30 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.80 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 485.06 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 3230.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.8 MB in the end (delta: 109.0 MB). Peak memory consumption was 109.0 MB. Max. memory is 11.5 GB. * Witness Printer took 56.80 ms. Allocated memory is still 1.2 GB. Free memory was 975.8 MB in the beginning and 971.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 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: 3.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 292 SDslu, 260 SDs, 0 SdLazy, 402 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s 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, 0.1s SatisfiabilityAnalysisTime, 0.6s 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...