./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a501c55d63fd9a2de7fb7a25d7fd900352e0181 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:59:15,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:59:15,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:59:15,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:59:15,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:59:15,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:59:15,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:59:15,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:59:15,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:59:15,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:59:15,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:59:15,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:59:15,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:59:15,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:59:15,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:59:15,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:59:15,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:59:15,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:59:15,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:59:15,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:59:15,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:59:15,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:59:15,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:59:15,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:59:15,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:59:15,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:59:15,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:59:15,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:59:15,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:59:15,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:59:15,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:59:15,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:59:15,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:59:15,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:59:15,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:59:15,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:59:15,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:59:15,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:59:15,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:59:15,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:59:15,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:59:15,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:59:15,833 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:59:15,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:59:15,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:59:15,834 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:59:15,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:59:15,835 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:59:15,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:59:15,835 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:59:15,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:59:15,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:59:15,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:59:15,837 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:59:15,837 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:59:15,837 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:59:15,838 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:59:15,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:59:15,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:59:15,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:59:15,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:59:15,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:59:15,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:59:15,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:59:15,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:59:15,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:59:15,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:59:15,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:59:15,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:59:15,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:59:15,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:59:15,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:59:15,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:59:15,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:59:15,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:59:15,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:59:15,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:59:15,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:59:15,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:59:15,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:59:15,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:59:15,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:59:15,845 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a501c55d63fd9a2de7fb7a25d7fd900352e0181 [2020-11-22 12:59:16,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:59:16,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:59:16,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:59:16,189 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:59:16,191 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:59:16,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2020-11-22 12:59:16,262 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/data/b316964bc/007c4546ca8945a5889074ebaca39f3a/FLAG09f4e7284 [2020-11-22 12:59:16,747 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:59:16,748 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2020-11-22 12:59:16,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/data/b316964bc/007c4546ca8945a5889074ebaca39f3a/FLAG09f4e7284 [2020-11-22 12:59:17,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/data/b316964bc/007c4546ca8945a5889074ebaca39f3a [2020-11-22 12:59:17,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:59:17,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:59:17,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:17,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:59:17,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:59:17,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4479582a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17, skipping insertion in model container [2020-11-22 12:59:17,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:59:17,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:59:17,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:17,486 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:59:17,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:17,639 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:59:17,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17 WrapperNode [2020-11-22 12:59:17,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:17,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:17,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:59:17,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:59:17,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:17,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:59:17,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:59:17,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:59:17,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... [2020-11-22 12:59:17,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:59:17,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:59:17,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:59:17,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:59:17,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:59:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:59:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:59:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 12:59:17,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 12:59:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:59:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 12:59:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:59:17,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:59:17,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:59:17,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:59:18,724 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:59:18,725 INFO L298 CfgBuilder]: Removed 22 assume(true) statements. [2020-11-22 12:59:18,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:18 BoogieIcfgContainer [2020-11-22 12:59:18,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:59:18,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:59:18,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:59:18,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:59:18,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:59:17" (1/3) ... [2020-11-22 12:59:18,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260b994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:18, skipping insertion in model container [2020-11-22 12:59:18,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:17" (2/3) ... [2020-11-22 12:59:18,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260b994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:18, skipping insertion in model container [2020-11-22 12:59:18,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:18" (3/3) ... [2020-11-22 12:59:18,737 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2020-11-22 12:59:18,752 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:59:18,756 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:59:18,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:59:18,788 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:59:18,788 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:59:18,788 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:59:18,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:59:18,789 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:59:18,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:59:18,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:59:18,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:59:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-22 12:59:18,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:59:18,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:18,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:18,807 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1309425190, now seen corresponding path program 1 times [2020-11-22 12:59:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:18,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594897671] [2020-11-22 12:59:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:18,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594897671] [2020-11-22 12:59:18,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:18,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:59:18,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005533020] [2020-11-22 12:59:18,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:59:18,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:59:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:18,983 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-11-22 12:59:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:19,030 INFO L93 Difference]: Finished difference Result 30 states and 46 transitions. [2020-11-22 12:59:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:59:19,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-22 12:59:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:19,049 INFO L225 Difference]: With dead ends: 30 [2020-11-22 12:59:19,051 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 12:59:19,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 12:59:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-22 12:59:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 12:59:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2020-11-22 12:59:19,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2020-11-22 12:59:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:19,095 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2020-11-22 12:59:19,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:59:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2020-11-22 12:59:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:59:19,096 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:19,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:19,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:59:19,096 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1331445502, now seen corresponding path program 1 times [2020-11-22 12:59:19,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:19,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155038229] [2020-11-22 12:59:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:19,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155038229] [2020-11-22 12:59:19,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160183698] [2020-11-22 12:59:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/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 [2020-11-22 12:59:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:59:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:59:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:19,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:59:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:19,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834404515] [2020-11-22 12:59:19,387 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-22 12:59:19,387 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:59:19,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:59:19,396 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:59:19,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:59:19,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:19,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:19,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:20,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:20,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:21,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:21,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:21,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:22,258 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:59:22,401 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-11-22 12:59:22,567 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-11-22 12:59:22,775 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 12:59:22,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:59:22,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2020-11-22 12:59:22,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670955795] [2020-11-22 12:59:22,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:59:22,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:59:22,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:59:22,779 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2020-11-22 12:59:23,011 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-11-22 12:59:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:23,046 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-11-22 12:59:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:59:23,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-22 12:59:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:23,048 INFO L225 Difference]: With dead ends: 20 [2020-11-22 12:59:23,048 INFO L226 Difference]: Without dead ends: 14 [2020-11-22 12:59:23,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:59:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-22 12:59:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-22 12:59:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 12:59:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2020-11-22 12:59:23,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2020-11-22 12:59:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:23,054 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-11-22 12:59:23,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:59:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2020-11-22 12:59:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:59:23,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:23,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:23,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:59:23,276 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:23,276 INFO L82 PathProgramCache]: Analyzing trace with hash 783184545, now seen corresponding path program 1 times [2020-11-22 12:59:23,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:23,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463251867] [2020-11-22 12:59:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:59:23,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463251867] [2020-11-22 12:59:23,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783153085] [2020-11-22 12:59:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/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 [2020-11-22 12:59:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:23,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:59:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:59:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:59:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:59:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 12:59:23,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226083605] [2020-11-22 12:59:23,499 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-22 12:59:23,500 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:59:23,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:59:23,500 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:59:23,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:59:23,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:23,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:23,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:24,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:24,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:24,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:25,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:25,301 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:25,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:25,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:25,972 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:59:26,110 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-11-22 12:59:26,294 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-11-22 12:59:26,468 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 12:59:26,748 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-11-22 12:59:26,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:59:26,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2020-11-22 12:59:26,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415966432] [2020-11-22 12:59:26,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:59:26,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:26,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:59:26,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:59:26,751 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 6 states. [2020-11-22 12:59:26,943 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-11-22 12:59:27,238 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-11-22 12:59:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:27,295 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2020-11-22 12:59:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:59:27,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-22 12:59:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:27,296 INFO L225 Difference]: With dead ends: 23 [2020-11-22 12:59:27,296 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 12:59:27,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-22 12:59:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 12:59:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-22 12:59:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-22 12:59:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2020-11-22 12:59:27,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2020-11-22 12:59:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:27,302 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2020-11-22 12:59:27,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:59:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2020-11-22 12:59:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:59:27,304 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:27,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:59:27,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:59:27,516 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:59:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash -41816636, now seen corresponding path program 1 times [2020-11-22 12:59:27,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:27,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164440381] [2020-11-22 12:59:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:59:27,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164440381] [2020-11-22 12:59:27,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996197212] [2020-11-22 12:59:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/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 [2020-11-22 12:59:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:59:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:59:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:59:27,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:59:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:59:27,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411309268] [2020-11-22 12:59:27,694 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-22 12:59:27,694 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:59:27,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:59:27,694 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:59:27,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:59:27,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:27,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:27,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:28,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:28,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:28,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:29,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:29,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:29,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:30,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:59:30,659 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:59:30,800 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-11-22 12:59:31,007 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-11-22 12:59:31,545 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-11-22 12:59:31,733 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-11-22 12:59:32,133 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-11-22 12:59:32,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:59:32,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 9 [2020-11-22 12:59:32,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139501472] [2020-11-22 12:59:32,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:59:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:32,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:59:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:59:32,136 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 7 states. [2020-11-22 12:59:32,607 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-11-22 12:59:32,789 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-11-22 12:59:33,302 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-11-22 12:59:33,524 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-11-22 12:59:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:33,526 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2020-11-22 12:59:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:59:33,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-22 12:59:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:33,527 INFO L225 Difference]: With dead ends: 15 [2020-11-22 12:59:33,527 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:59:33,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-22 12:59:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:59:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:59:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:59:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:59:33,528 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-11-22 12:59:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:33,528 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:59:33,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:59:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:59:33,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:59:33,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:59:33,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:59:33,927 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-22 12:59:34,337 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2020-11-22 12:59:34,500 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-11-22 12:59:34,699 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-11-22 12:59:34,702 INFO L274 CegarLoopResult]: For program point L589(lines 589 591) no Hoare annotation was computed. [2020-11-22 12:59:34,703 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:59:34,703 INFO L277 CegarLoopResult]: At program point L573(line 573) the Hoare annotation is: true [2020-11-22 12:59:34,703 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-22 12:59:34,703 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-22 12:59:34,703 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-22 12:59:34,703 INFO L270 CegarLoopResult]: At program point L633-3(lines 633 638) the Hoare annotation is: (and (<= ULTIMATE.start_dll_create_~new_head~0.offset 0) (<= ULTIMATE.start_dll_update_at_~data 3) (= 2 ULTIMATE.start_main_~len~0) (<= |ULTIMATE.start_dll_update_at_#in~index| 1) (<= ULTIMATE.start_dll_create_~head~0.offset 0) (<= |ULTIMATE.start_dll_create_#res.offset| 0) (<= 0 ULTIMATE.start_main_~s~0.offset) (<= 0 |ULTIMATE.start_dll_update_at_#in~head.offset|) (<= ULTIMATE.start_dll_create_~len 0) (<= ULTIMATE.start_main_~s~0.offset 0) (<= |ULTIMATE.start_dll_update_at_#in~data| 3) (<= 0 ULTIMATE.start_dll_create_~head~0.offset) (= |#NULL.offset| 0) (= |ULTIMATE.start_dll_create_#t~malloc6.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= 0 ULTIMATE.start_dll_create_~new_head~0.offset) (<= ULTIMATE.start_main_~data~0 1) (= |#NULL.base| 0) (<= 1 ULTIMATE.start_main_~data~0) (= ULTIMATE.start_main_~len~0 (+ ULTIMATE.start_main_~i~0 1)) (<= |ULTIMATE.start_dll_create_#in~data| 1) (<= 1 ULTIMATE.start_dll_create_~data) (<= 2 |ULTIMATE.start_dll_create_#in~len|) (= ULTIMATE.start_dll_update_at_~data (select (select |#memory_int| ULTIMATE.start_dll_update_at_~head.base) ULTIMATE.start_dll_update_at_~head.offset)) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_dll_create_#res.offset|) (<= ULTIMATE.start_main_~new_data~0 3) (<= 1 |ULTIMATE.start_dll_create_#in~data|) (<= ULTIMATE.start_dll_update_at_~index 0) (<= |ULTIMATE.start_dll_create_#in~len| 2) (<= |ULTIMATE.start_dll_update_at_#in~head.offset| 0) (<= ULTIMATE.start_dll_create_~data 1) (= |#t~string0.offset| 0)) [2020-11-22 12:59:34,703 INFO L277 CegarLoopResult]: At program point L642(lines 624 643) the Hoare annotation is: true [2020-11-22 12:59:34,704 INFO L270 CegarLoopResult]: At program point L618-2(lines 618 621) the Hoare annotation is: (and (<= ULTIMATE.start_dll_create_~new_head~0.offset 0) (<= ULTIMATE.start_dll_update_at_~data 3) (= 2 ULTIMATE.start_main_~len~0) (<= |ULTIMATE.start_dll_update_at_#in~index| 1) (<= ULTIMATE.start_dll_create_~head~0.offset 0) (<= |ULTIMATE.start_dll_create_#res.offset| 0) (<= 0 ULTIMATE.start_main_~s~0.offset) (<= 0 |ULTIMATE.start_dll_update_at_#in~head.offset|) (<= ULTIMATE.start_dll_create_~len 0) (<= ULTIMATE.start_main_~s~0.offset 0) (<= |ULTIMATE.start_dll_update_at_#in~data| 3) (<= 0 ULTIMATE.start_dll_create_~head~0.offset) (= |#NULL.offset| 0) (= |ULTIMATE.start_dll_create_#t~malloc6.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#t~string1.offset| 0) (<= 0 |#t~string0.base|) (<= ULTIMATE.start_dll_update_at_~index 1) (<= 0 ULTIMATE.start_dll_create_~new_head~0.offset) (<= ULTIMATE.start_main_~data~0 1) (= |#NULL.base| 0) (<= 1 ULTIMATE.start_main_~data~0) (<= |ULTIMATE.start_dll_create_#in~data| 1) (<= 1 ULTIMATE.start_dll_create_~data) (<= 2 |ULTIMATE.start_dll_create_#in~len|) (<= 0 |#t~string1.base|) (<= 0 |ULTIMATE.start_dll_create_#res.offset|) (<= ULTIMATE.start_main_~new_data~0 3) (<= 1 |ULTIMATE.start_dll_create_#in~data|) (<= ULTIMATE.start_main_~i~0 1) (<= |ULTIMATE.start_dll_create_#in~len| 2) (<= |ULTIMATE.start_dll_update_at_#in~head.offset| 0) (<= ULTIMATE.start_dll_create_~data 1) (= |#t~string0.offset| 0)) [2020-11-22 12:59:34,704 INFO L270 CegarLoopResult]: At program point L635(lines 635 637) the Hoare annotation is: false [2020-11-22 12:59:34,704 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 12:59:34,704 INFO L270 CegarLoopResult]: At program point L611-2(lines 611 614) the Hoare annotation is: false [2020-11-22 12:59:34,704 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:59:34,704 INFO L270 CegarLoopResult]: At program point L587-2(lines 587 600) the Hoare annotation is: (let ((.cse0 (= |#t~string1.offset| 0)) (.cse1 (<= 0 |#t~string0.base|)) (.cse2 (<= ULTIMATE.start_main_~data~0 1)) (.cse3 (= |#NULL.base| 0)) (.cse4 (<= 1 ULTIMATE.start_main_~data~0)) (.cse5 (<= |ULTIMATE.start_dll_create_#in~data| 1)) (.cse6 (<= 1 ULTIMATE.start_dll_create_~data)) (.cse7 (<= 2 |ULTIMATE.start_dll_create_#in~len|)) (.cse8 (= 2 ULTIMATE.start_main_~len~0)) (.cse9 (<= 0 |#t~string1.base|)) (.cse10 (<= ULTIMATE.start_dll_create_~head~0.offset 0)) (.cse11 (<= ULTIMATE.start_dll_create_~len 2)) (.cse12 (<= 1 |ULTIMATE.start_dll_create_#in~data|)) (.cse13 (<= 0 ULTIMATE.start_dll_create_~head~0.offset)) (.cse14 (<= |ULTIMATE.start_dll_create_#in~len| 2)) (.cse15 (= |#NULL.offset| 0)) (.cse16 (<= ULTIMATE.start_dll_create_~data 1)) (.cse17 (= |#t~string0.offset| 0)) (.cse18 (<= 0 |#StackHeapBarrier|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 (<= 2 ULTIMATE.start_dll_create_~len) .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18) (and .cse0 .cse1 (<= 0 ULTIMATE.start_dll_create_~new_head~0.offset) .cse2 .cse3 (<= ULTIMATE.start_dll_create_~new_head~0.offset 0) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 (= |ULTIMATE.start_dll_create_#t~malloc6.offset| 0) .cse16 .cse17 .cse18))) [2020-11-22 12:59:34,704 INFO L277 CegarLoopResult]: At program point L604-2(lines 604 608) the Hoare annotation is: true [2020-11-22 12:59:34,704 INFO L270 CegarLoopResult]: At program point L629-2(lines 629 632) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_dll_create_~new_head~0.offset 0)) (.cse1 (<= |#t~string1.offset| 0)) (.cse2 (<= ULTIMATE.start_dll_create_~len 0)) (.cse3 (<= ULTIMATE.start_main_~s~0.offset 0)) (.cse4 (<= 0 ULTIMATE.start_dll_create_~head~0.offset)) (.cse5 (= |ULTIMATE.start_dll_create_#t~malloc6.offset| 0)) (.cse6 (<= 0 |#StackHeapBarrier|)) (.cse7 (<= 0 |#t~string0.base|)) (.cse8 (<= 0 ULTIMATE.start_dll_create_~new_head~0.offset)) (.cse9 (<= |#NULL.base| 0)) (.cse10 (<= ULTIMATE.start_main_~data~0 1)) (.cse11 (<= 1 ULTIMATE.start_main_~data~0)) (.cse12 (<= |ULTIMATE.start_dll_create_#in~data| 1)) (.cse13 (<= 1 ULTIMATE.start_dll_create_~data)) (.cse14 (<= 2 |ULTIMATE.start_dll_create_#in~len|)) (.cse15 (<= 0 |#t~string1.base|)) (.cse16 (<= 1 |ULTIMATE.start_dll_create_#in~data|)) (.cse17 (<= 0 |#t~string1.offset|)) (.cse18 (<= 0 |#NULL.base|)) (.cse19 (<= |ULTIMATE.start_dll_create_#in~len| 2)) (.cse20 (<= ULTIMATE.start_dll_create_~data 1)) (.cse21 (= |#t~string0.offset| 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |#NULL.offset| 0) .cse5 .cse6 (= ULTIMATE.start_dll_create_~head~0.base |ULTIMATE.start_dll_create_#res.base|) .cse7 .cse8 .cse9 .cse10 (= ULTIMATE.start_main_~len~0 (+ ULTIMATE.start_main_~i~0 1)) .cse11 .cse12 .cse13 .cse14 (= ULTIMATE.start_main_~s~0.base |ULTIMATE.start_dll_create_#res.base|) .cse15 (= ULTIMATE.start_main_~s~0.offset |ULTIMATE.start_dll_create_#res.offset|) .cse16 (<= ULTIMATE.start_main_~i~0 1) (<= 1 ULTIMATE.start_main_~i~0) .cse17 .cse18 .cse19 (= ULTIMATE.start_dll_create_~head~0.offset |ULTIMATE.start_dll_create_#res.offset|) .cse20 .cse21) (and (<= 2 ULTIMATE.start_main_~len~0) (<= 0 |#NULL.offset|) .cse0 (<= ULTIMATE.start_dll_update_at_~data 3) (<= ULTIMATE.start_main_~len~0 2) (<= |ULTIMATE.start_dll_update_at_#in~index| 1) .cse1 (<= ULTIMATE.start_dll_create_~head~0.offset 0) (<= |ULTIMATE.start_dll_create_#res.offset| 0) (<= 0 |ULTIMATE.start_dll_update_at_#in~head.offset|) (<= 0 ULTIMATE.start_main_~s~0.offset) .cse2 .cse3 (<= |ULTIMATE.start_dll_update_at_#in~data| 3) .cse4 .cse5 .cse6 .cse7 .cse8 (<= ULTIMATE.start_main_~i~0 0) .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 (= ULTIMATE.start_dll_update_at_~data (select (select |#memory_int| ULTIMATE.start_dll_update_at_~head.base) ULTIMATE.start_dll_update_at_~head.offset)) .cse15 (<= 0 |ULTIMATE.start_dll_create_#res.offset|) (<= ULTIMATE.start_main_~new_data~0 3) .cse16 (<= ULTIMATE.start_dll_update_at_~index 0) .cse17 .cse18 .cse19 (<= |ULTIMATE.start_dll_update_at_#in~head.offset| 0) .cse20 .cse21 (<= |#NULL.offset| 0)))) [2020-11-22 12:59:34,717 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,718 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,718 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,719 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,719 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,719 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,726 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,726 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,726 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,727 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,727 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,727 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,731 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,731 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,732 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,732 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,732 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,733 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,733 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,733 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,733 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,734 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,736 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,737 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,737 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,737 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,738 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,738 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,738 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,739 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,739 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,739 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,749 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,749 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,749 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,750 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,751 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,751 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,753 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,753 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,753 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,754 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,755 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,755 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,756 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,756 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:59:34 BoogieIcfgContainer [2020-11-22 12:59:34,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:59:34,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:59:34,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:59:34,759 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:59:34,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:18" (3/4) ... [2020-11-22 12:59:34,763 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:59:34,772 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2020-11-22 12:59:34,773 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-22 12:59:34,773 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:59:34,774 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:59:34,796 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((("dll2n_update_all_reverse.c" == 0 && 0 <= "0") && data <= 1) && #NULL == 0) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && 2 == len) && 0 <= "dll2n_update_all_reverse.c") && head <= 0) && len <= 2) && 2 <= len) && 1 <= \old(data)) && 0 <= head) && \old(len) <= 2) && #NULL == 0) && data <= 1) && "0" == 0) && 0 <= unknown-#StackHeapBarrier-unknown) || ((((((((((((((((((((("dll2n_update_all_reverse.c" == 0 && 0 <= "0") && 0 <= new_head) && data <= 1) && #NULL == 0) && new_head <= 0) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && 2 == len) && 0 <= "dll2n_update_all_reverse.c") && head <= 0) && len <= 2) && 1 <= \old(data)) && 0 <= head) && \old(len) <= 2) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && data <= 1) && "0" == 0) && 0 <= unknown-#StackHeapBarrier-unknown) [2020-11-22 12:59:34,797 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((((((new_head <= 0 && "dll2n_update_all_reverse.c" <= 0) && len <= 0) && s <= 0) && 0 <= head) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && head == \result) && 0 <= "0") && 0 <= new_head) && #NULL <= 0) && data <= 1) && len == i + 1) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && s == \result) && 0 <= "dll2n_update_all_reverse.c") && s == \result) && 1 <= \old(data)) && i <= 1) && 1 <= i) && 0 <= "dll2n_update_all_reverse.c") && 0 <= #NULL) && \old(len) <= 2) && head == \result) && data <= 1) && "0" == 0) || ((((((((((((((((((((((((((((((((((((((2 <= len && 0 <= #NULL) && new_head <= 0) && data <= 3) && len <= 2) && \old(index) <= 1) && "dll2n_update_all_reverse.c" <= 0) && head <= 0) && \result <= 0) && 0 <= head) && 0 <= s) && len <= 0) && s <= 0) && \old(data) <= 3) && 0 <= head) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && 0 <= "0") && 0 <= new_head) && i <= 0) && #NULL <= 0) && data <= 1) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && data == unknown-#memory_int-unknown[head][head]) && 0 <= "dll2n_update_all_reverse.c") && 0 <= \result) && new_data <= 3) && 1 <= \old(data)) && index <= 0) && 0 <= "dll2n_update_all_reverse.c") && 0 <= #NULL) && \old(len) <= 2) && head <= 0) && data <= 1) && "0" == 0) && #NULL <= 0) [2020-11-22 12:59:34,797 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((((((((((((((((((((((((new_head <= 0 && data <= 3) && 2 == len) && \old(index) <= 1) && head <= 0) && \result <= 0) && 0 <= s) && 0 <= head) && len <= 0) && s <= 0) && \old(data) <= 3) && 0 <= head) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && "dll2n_update_all_reverse.c" == 0) && 0 <= "0") && 0 <= new_head) && data <= 1) && #NULL == 0) && 1 <= data) && len == i + 1) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && data == unknown-#memory_int-unknown[head][head]) && 0 <= "dll2n_update_all_reverse.c") && 0 <= \result) && new_data <= 3) && 1 <= \old(data)) && index <= 0) && \old(len) <= 2) && head <= 0) && data <= 1) && "0" == 0 [2020-11-22 12:59:34,797 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((((((((((((((((((((((((((new_head <= 0 && data <= 3) && 2 == len) && \old(index) <= 1) && head <= 0) && \result <= 0) && 0 <= s) && 0 <= head) && len <= 0) && s <= 0) && \old(data) <= 3) && 0 <= head) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && "dll2n_update_all_reverse.c" == 0) && 0 <= "0") && index <= 1) && 0 <= new_head) && data <= 1) && #NULL == 0) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && 0 <= "dll2n_update_all_reverse.c") && 0 <= \result) && new_data <= 3) && 1 <= \old(data)) && i <= 1) && \old(len) <= 2) && head <= 0) && data <= 1) && "0" == 0 [2020-11-22 12:59:34,813 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_182fa988-5fa4-4e1f-8dd5-9ab9360431f8/bin/utaipan/witness.graphml [2020-11-22 12:59:34,813 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:59:34,814 INFO L168 Benchmark]: Toolchain (without parser) took 17725.70 ms. Allocated memory was 111.1 MB in the beginning and 237.0 MB in the end (delta: 125.8 MB). Free memory was 77.9 MB in the beginning and 168.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,815 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory was 52.8 MB in the beginning and 52.8 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:34,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.86 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 75.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.57 ms. Allocated memory is still 111.1 MB. Free memory was 75.2 MB in the beginning and 73.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,816 INFO L168 Benchmark]: Boogie Preprocessor took 67.41 ms. Allocated memory is still 111.1 MB. Free memory was 73.1 MB in the beginning and 71.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,816 INFO L168 Benchmark]: RCFGBuilder took 940.11 ms. Allocated memory is still 111.1 MB. Free memory was 71.5 MB in the beginning and 79.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,816 INFO L168 Benchmark]: TraceAbstraction took 16030.06 ms. Allocated memory was 111.1 MB in the beginning and 237.0 MB in the end (delta: 125.8 MB). Free memory was 79.2 MB in the beginning and 172.5 MB in the end (delta: -93.3 MB). Peak memory consumption was 134.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,817 INFO L168 Benchmark]: Witness Printer took 54.48 ms. Allocated memory is still 237.0 MB. Free memory was 171.5 MB in the beginning and 168.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:34,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 81.8 MB. Free memory was 52.8 MB in the beginning and 52.8 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 546.86 ms. Allocated memory is still 111.1 MB. Free memory was 77.4 MB in the beginning and 75.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.57 ms. Allocated memory is still 111.1 MB. Free memory was 75.2 MB in the beginning and 73.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.41 ms. Allocated memory is still 111.1 MB. Free memory was 73.1 MB in the beginning and 71.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 940.11 ms. Allocated memory is still 111.1 MB. Free memory was 71.5 MB in the beginning and 79.8 MB in the end (delta: -8.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16030.06 ms. Allocated memory was 111.1 MB in the beginning and 237.0 MB in the end (delta: 125.8 MB). Free memory was 79.2 MB in the beginning and 172.5 MB in the end (delta: -93.3 MB). Peak memory consumption was 134.3 MB. Max. memory is 16.1 GB. * Witness Printer took 54.48 ms. Allocated memory is still 237.0 MB. Free memory was 171.5 MB in the beginning and 168.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 587]: Loop Invariant [2020-11-22 12:59:34,829 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,830 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,830 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,830 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,830 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,831 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,832 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,832 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,832 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,833 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,833 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,833 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: ((((((((((((((((((("dll2n_update_all_reverse.c" == 0 && 0 <= "0") && data <= 1) && #NULL == 0) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && 2 == len) && 0 <= "dll2n_update_all_reverse.c") && head <= 0) && len <= 2) && 2 <= len) && 1 <= \old(data)) && 0 <= head) && \old(len) <= 2) && #NULL == 0) && data <= 1) && "0" == 0) && 0 <= unknown-#StackHeapBarrier-unknown) || ((((((((((((((((((((("dll2n_update_all_reverse.c" == 0 && 0 <= "0") && 0 <= new_head) && data <= 1) && #NULL == 0) && new_head <= 0) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && 2 == len) && 0 <= "dll2n_update_all_reverse.c") && head <= 0) && len <= 2) && 1 <= \old(data)) && 0 <= head) && \old(len) <= 2) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && data <= 1) && "0" == 0) && 0 <= unknown-#StackHeapBarrier-unknown) - InvariantResult [Line: 629]: Loop Invariant [2020-11-22 12:59:34,835 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,835 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,835 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,836 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,836 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,836 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,837 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,837 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,837 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,837 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,839 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,839 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,840 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,840 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,840 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,841 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,841 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,841 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,841 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,841 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: (((((((((((((((((((((((((((((new_head <= 0 && "dll2n_update_all_reverse.c" <= 0) && len <= 0) && s <= 0) && 0 <= head) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && head == \result) && 0 <= "0") && 0 <= new_head) && #NULL <= 0) && data <= 1) && len == i + 1) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && s == \result) && 0 <= "dll2n_update_all_reverse.c") && s == \result) && 1 <= \old(data)) && i <= 1) && 1 <= i) && 0 <= "dll2n_update_all_reverse.c") && 0 <= #NULL) && \old(len) <= 2) && head == \result) && data <= 1) && "0" == 0) || ((((((((((((((((((((((((((((((((((((((2 <= len && 0 <= #NULL) && new_head <= 0) && data <= 3) && len <= 2) && \old(index) <= 1) && "dll2n_update_all_reverse.c" <= 0) && head <= 0) && \result <= 0) && 0 <= head) && 0 <= s) && len <= 0) && s <= 0) && \old(data) <= 3) && 0 <= head) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && 0 <= "0") && 0 <= new_head) && i <= 0) && #NULL <= 0) && data <= 1) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && data == unknown-#memory_int-unknown[head][head]) && 0 <= "dll2n_update_all_reverse.c") && 0 <= \result) && new_data <= 3) && 1 <= \old(data)) && index <= 0) && 0 <= "dll2n_update_all_reverse.c") && 0 <= #NULL) && \old(len) <= 2) && head <= 0) && data <= 1) && "0" == 0) && #NULL <= 0) - InvariantResult [Line: 618]: Loop Invariant [2020-11-22 12:59:34,843 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,843 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,845 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,845 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((((((((((((((((((((((((((((((new_head <= 0 && data <= 3) && 2 == len) && \old(index) <= 1) && head <= 0) && \result <= 0) && 0 <= s) && 0 <= head) && len <= 0) && s <= 0) && \old(data) <= 3) && 0 <= head) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && "dll2n_update_all_reverse.c" == 0) && 0 <= "0") && index <= 1) && 0 <= new_head) && data <= 1) && #NULL == 0) && 1 <= data) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && 0 <= "dll2n_update_all_reverse.c") && 0 <= \result) && new_data <= 3) && 1 <= \old(data)) && i <= 1) && \old(len) <= 2) && head <= 0) && data <= 1) && "0" == 0 - InvariantResult [Line: 573]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 611]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 633]: Loop Invariant [2020-11-22 12:59:34,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,847 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,847 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-11-22 12:59:34,848 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,848 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-11-22 12:59:34,848 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2020-11-22 12:59:34,849 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((((((((((((((((((((((((((((((new_head <= 0 && data <= 3) && 2 == len) && \old(index) <= 1) && head <= 0) && \result <= 0) && 0 <= s) && 0 <= head) && len <= 0) && s <= 0) && \old(data) <= 3) && 0 <= head) && #NULL == 0) && malloc(sizeof(struct node)) == 0) && 0 <= unknown-#StackHeapBarrier-unknown) && "dll2n_update_all_reverse.c" == 0) && 0 <= "0") && 0 <= new_head) && data <= 1) && #NULL == 0) && 1 <= data) && len == i + 1) && \old(data) <= 1) && 1 <= data) && 2 <= \old(len)) && data == unknown-#memory_int-unknown[head][head]) && 0 <= "dll2n_update_all_reverse.c") && 0 <= \result) && new_data <= 3) && 1 <= \old(data)) && index <= 0) && \old(len) <= 2) && head <= 0) && data <= 1) && "0" == 0 - InvariantResult [Line: 635]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 604]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 68 SDslu, 29 SDs, 0 SdLazy, 71 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 18 NumberOfFragments, 565 HoareAnnotationTreeSize, 9 FomulaSimplifications, 765 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 283 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 1677 SizeOfPredicates, 9 NumberOfNonLiveVariables, 372 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 9/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 8311, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 26, DAG_INTERPRETER_EARLY_EXITS: 4, TOOLS_POST_APPLICATIONS: 43, TOOLS_POST_TIME[ms]: 7382, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 41, TOOLS_QUANTIFIERELIM_TIME[ms]: 7362, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 840, FLUID_QUERY_TIME[ms]: 6, FLUID_QUERIES: 89, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 11, DOMAIN_JOIN_TIME[ms]: 460, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME[ms]: 259, DOMAIN_ISSUBSETEQ_APPLICATIONS: 10, DOMAIN_ISSUBSETEQ_TIME[ms]: 40, DOMAIN_ISBOTTOM_APPLICATIONS: 26, DOMAIN_ISBOTTOM_TIME[ms]: 92, LOOP_SUMMARIZER_APPLICATIONS: 5, LOOP_SUMMARIZER_CACHE_MISSES: 5, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 4828, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 4827, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 10, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 25, DAG_COMPRESSION_PROCESSED_NODES: 567, DAG_COMPRESSION_RETAINED_NODES: 100, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...