./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cfdde8b1798318c3bb26b76a748741913b280952 ...................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cfdde8b1798318c3bb26b76a748741913b280952 ......................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:26:29,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:29,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:29,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:29,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:29,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:29,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:29,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:29,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:29,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:29,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:29,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:29,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:29,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:29,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:29,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:29,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:29,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:29,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:29,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:29,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:29,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:29,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:29,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:29,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:29,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:29,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:29,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:29,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:29,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:29,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:29,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:29,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:29,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:29,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:29,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:29,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:29,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:29,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:29,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:29,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:29,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:26:29,562 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:29,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:29,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:29,563 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:29,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:29,564 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:29,564 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:26:29,564 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:29,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:29,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:26:29,565 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:26:29,565 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:29,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:29,566 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:29,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:26:29,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:29,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:29,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:29,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:29,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:29,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:29,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:29,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:29,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:29,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:29,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:29,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:29,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:29,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:29,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:29,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:29,571 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:26:29,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:26:29,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:29,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:29,572 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/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(__VERIFIER_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 -> cfdde8b1798318c3bb26b76a748741913b280952 [2019-10-22 11:26:29,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:29,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:29,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:29,640 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:29,641 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:29,641 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2019-10-22 11:26:29,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/dfb1f3c18/d601bdf6b97e4b2ebc1488d383f0aec2/FLAGa317df96f [2019-10-22 11:26:30,149 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:30,160 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2019-10-22 11:26:30,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/dfb1f3c18/d601bdf6b97e4b2ebc1488d383f0aec2/FLAGa317df96f [2019-10-22 11:26:30,459 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/dfb1f3c18/d601bdf6b97e4b2ebc1488d383f0aec2 [2019-10-22 11:26:30,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:30,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:30,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:30,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:30,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:30,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:30" (1/1) ... [2019-10-22 11:26:30,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc8848c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:30, skipping insertion in model container [2019-10-22 11:26:30,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:30" (1/1) ... [2019-10-22 11:26:30,481 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:30,517 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:30,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:30,904 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:30,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:31,010 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:31,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31 WrapperNode [2019-10-22 11:26:31,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:31,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:31,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:31,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:31,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:31,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:31,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:31,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:31,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... [2019-10-22 11:26:31,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:31,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:31,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:31,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:31,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/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 [2019-10-22 11:26:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:26:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:26:31,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:26:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:26:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:26:31,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:26:31,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:31,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:31,694 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:31,695 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-10-22 11:26:31,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:31 BoogieIcfgContainer [2019-10-22 11:26:31,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:31,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:31,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:31,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:31,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:30" (1/3) ... [2019-10-22 11:26:31,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b54d831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:31, skipping insertion in model container [2019-10-22 11:26:31,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:31" (2/3) ... [2019-10-22 11:26:31,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b54d831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:31, skipping insertion in model container [2019-10-22 11:26:31,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:31" (3/3) ... [2019-10-22 11:26:31,705 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2019-10-22 11:26:31,715 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:31,723 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:31,733 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:31,757 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:31,757 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:31,757 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:31,758 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:31,758 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:31,758 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:31,758 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:31,758 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-22 11:26:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:26:31,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:31,782 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:31,784 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:31,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1608020802, now seen corresponding path program 1 times [2019-10-22 11:26:31,800 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:31,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437798656] [2019-10-22 11:26:31,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:31,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:31,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:31,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437798656] [2019-10-22 11:26:31,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:31,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:26:31,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081549407] [2019-10-22 11:26:31,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:26:31,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:26:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:31,971 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-22 11:26:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:32,002 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2019-10-22 11:26:32,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:26:32,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-22 11:26:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:32,014 INFO L225 Difference]: With dead ends: 56 [2019-10-22 11:26:32,014 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 11:26:32,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 11:26:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-10-22 11:26:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:26:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-10-22 11:26:32,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2019-10-22 11:26:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:32,055 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-10-22 11:26:32,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:26:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-10-22 11:26:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:26:32,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:32,056 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:32,056 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:32,056 INFO L82 PathProgramCache]: Analyzing trace with hash -780239213, now seen corresponding path program 1 times [2019-10-22 11:26:32,057 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:32,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238144224] [2019-10-22 11:26:32,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:32,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:32,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:32,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238144224] [2019-10-22 11:26:32,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:32,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:26:32,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466194518] [2019-10-22 11:26:32,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:26:32,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:26:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:32,138 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2019-10-22 11:26:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:32,178 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2019-10-22 11:26:32,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:26:32,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-22 11:26:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:32,184 INFO L225 Difference]: With dead ends: 47 [2019-10-22 11:26:32,184 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 11:26:32,185 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 11:26:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-22 11:26:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 11:26:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-22 11:26:32,190 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2019-10-22 11:26:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:32,190 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-22 11:26:32,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:26:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-22 11:26:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:26:32,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:32,194 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:32,194 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1367045227, now seen corresponding path program 1 times [2019-10-22 11:26:32,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:32,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729302672] [2019-10-22 11:26:32,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:32,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:32,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:32,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729302672] [2019-10-22 11:26:32,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114326454] [2019-10-22 11:26:32,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/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 [2019-10-22 11:26:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:32,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:26:32,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:32,378 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:32,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1951572431] [2019-10-22 11:26:32,404 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 19 [2019-10-22 11:26:32,460 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:26:32,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:26:32,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:26:32,777 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:26:32,793 INFO L168 Benchmark]: Toolchain (without parser) took 2328.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -105.6 MB). Peak memory consumption was 60.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:32,794 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:32,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 545.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:32,795 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:32,798 INFO L168 Benchmark]: Boogie Preprocessor took 41.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:32,799 INFO L168 Benchmark]: RCFGBuilder took 593.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:32,800 INFO L168 Benchmark]: TraceAbstraction took 1093.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 58.2 MB). Peak memory consumption was 58.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:32,803 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 545.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 49.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 41.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 593.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1093.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 58.2 MB). Peak memory consumption was 58.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:26:35,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:35,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:35,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:35,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:35,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:35,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:35,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:35,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:35,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:35,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:35,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:35,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:35,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:35,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:35,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:35,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:35,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:35,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:35,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:35,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:35,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:35,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:35,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:35,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:35,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:35,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:35,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:35,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:35,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:35,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:35,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:35,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:35,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:35,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:35,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:35,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:35,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:35,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:35,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:35,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:35,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:26:35,228 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:35,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:35,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:35,234 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:35,234 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:35,234 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:35,234 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:35,234 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:35,235 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:35,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:35,235 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:35,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:35,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:35,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:35,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:35,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:35,237 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:26:35,237 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:26:35,237 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:35,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:35,237 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:26:35,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:35,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:35,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:35,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:35,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:35,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:35,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:35,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:35,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:35,239 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:26:35,239 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:26:35,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:35,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:35,241 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/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(__VERIFIER_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 -> cfdde8b1798318c3bb26b76a748741913b280952 [2019-10-22 11:26:35,275 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:35,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:35,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:35,291 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:35,291 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:35,292 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2019-10-22 11:26:35,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/de8acf66d/7221e0e1e1874126ae9c1b68df90ac2a/FLAG5c733fe0c [2019-10-22 11:26:35,813 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:35,814 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2019-10-22 11:26:35,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/de8acf66d/7221e0e1e1874126ae9c1b68df90ac2a/FLAG5c733fe0c [2019-10-22 11:26:36,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/data/de8acf66d/7221e0e1e1874126ae9c1b68df90ac2a [2019-10-22 11:26:36,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:36,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:36,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:36,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:36,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:36,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9f6cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36, skipping insertion in model container [2019-10-22 11:26:36,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,154 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:36,197 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:36,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:36,643 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:36,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:36,738 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:36,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36 WrapperNode [2019-10-22 11:26:36,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:36,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:36,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:36,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:36,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:36,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:36,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:36,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:36,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... [2019-10-22 11:26:36,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:36,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:36,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:36,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:36,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/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 [2019-10-22 11:26:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 11:26:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:26:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:26:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:26:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:26:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:26:36,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:37,315 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:37,316 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-10-22 11:26:37,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:37 BoogieIcfgContainer [2019-10-22 11:26:37,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:37,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:37,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:37,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:37,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:36" (1/3) ... [2019-10-22 11:26:37,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7689be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:37, skipping insertion in model container [2019-10-22 11:26:37,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:36" (2/3) ... [2019-10-22 11:26:37,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7689be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:37, skipping insertion in model container [2019-10-22 11:26:37,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:37" (3/3) ... [2019-10-22 11:26:37,326 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2019-10-22 11:26:37,337 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:37,345 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:37,356 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:37,381 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:37,381 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:37,381 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:37,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:37,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:37,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:37,382 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:37,382 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-22 11:26:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:26:37,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:37,403 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:37,405 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1608020802, now seen corresponding path program 1 times [2019-10-22 11:26:37,417 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:37,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1749033299] [2019-10-22 11:26:37,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:37,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:26:37,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:37,621 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:26:37,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1749033299] [2019-10-22 11:26:37,644 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:37,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:26:37,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550189218] [2019-10-22 11:26:37,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:26:37,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:37,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:26:37,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:37,668 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2019-10-22 11:26:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:37,718 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2019-10-22 11:26:37,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:26:37,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-22 11:26:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:37,731 INFO L225 Difference]: With dead ends: 57 [2019-10-22 11:26:37,732 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 11:26:37,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 11:26:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-22 11:26:37,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 11:26:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-22 11:26:37,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2019-10-22 11:26:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:37,776 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-22 11:26:37,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:26:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-22 11:26:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:26:37,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:37,778 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:37,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:37,979 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:37,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1320261154, now seen corresponding path program 1 times [2019-10-22 11:26:37,980 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:37,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1902599333] [2019-10-22 11:26:37,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:38,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:26:38,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:26:38,113 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:26:38,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1902599333] [2019-10-22 11:26:38,120 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:38,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-10-22 11:26:38,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828805002] [2019-10-22 11:26:38,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:26:38,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:38,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:26:38,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:38,123 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-10-22 11:26:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:38,222 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-10-22 11:26:38,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:26:38,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-22 11:26:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:38,224 INFO L225 Difference]: With dead ends: 51 [2019-10-22 11:26:38,224 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 11:26:38,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:26:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 11:26:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-22 11:26:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 11:26:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-22 11:26:38,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2019-10-22 11:26:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:38,231 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-22 11:26:38,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:26:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-22 11:26:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:26:38,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:38,232 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:38,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:38,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 980561436, now seen corresponding path program 1 times [2019-10-22 11:26:38,434 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:26:38,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1649557771] [2019-10-22 11:26:38,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:38,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:26:38,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:26:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:26:38,628 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:26:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 11:26:38,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649557771] [2019-10-22 11:26:38,660 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:38,660 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:26:38,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321693569] [2019-10-22 11:26:38,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:26:38,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:26:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:26:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:26:38,662 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-10-22 11:26:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:38,730 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-10-22 11:26:38,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:26:38,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-22 11:26:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:38,732 INFO L225 Difference]: With dead ends: 35 [2019-10-22 11:26:38,732 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:26:38,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:26:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:26:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:26:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:26:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:26:38,734 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-10-22 11:26:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:38,734 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:26:38,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:26:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:26:38,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:26:38,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:26:38,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 11:26:39,067 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 630) no Hoare annotation was computed. [2019-10-22 11:26:39,067 INFO L443 ceAbstractionStarter]: For program point L622-2(lines 622 627) no Hoare annotation was computed. [2019-10-22 11:26:39,068 INFO L439 ceAbstractionStarter]: At program point L622-3(lines 622 627) the Hoare annotation is: (and (= (bvadd ULTIMATE.start_main_~len~0 (_ bv4294967294 32)) (_ bv0 32)) (= (bvadd ULTIMATE.start_main_~i~0 (_ bv4294967295 32)) (_ bv0 32))) [2019-10-22 11:26:39,068 INFO L443 ceAbstractionStarter]: For program point L622-4(lines 622 627) no Hoare annotation was computed. [2019-10-22 11:26:39,068 INFO L443 ceAbstractionStarter]: For program point L606(lines 1 632) no Hoare annotation was computed. [2019-10-22 11:26:39,068 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 11:26:39,068 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 11:26:39,068 INFO L446 ceAbstractionStarter]: At program point L631(lines 613 632) the Hoare annotation is: true [2019-10-22 11:26:39,069 INFO L439 ceAbstractionStarter]: At program point L590(lines 574 591) the Hoare annotation is: (= (bvadd ULTIMATE.start_main_~len~0 (_ bv4294967294 32)) (_ bv0 32)) [2019-10-22 11:26:39,069 INFO L439 ceAbstractionStarter]: At program point L607-2(lines 607 610) the Hoare annotation is: (and (= (bvadd ULTIMATE.start_main_~len~0 (_ bv4294967294 32)) (_ bv0 32)) (bvsge ULTIMATE.start_main_~i~0 (_ bv0 32))) [2019-10-22 11:26:39,069 INFO L443 ceAbstractionStarter]: For program point L607-3(lines 607 610) no Hoare annotation was computed. [2019-10-22 11:26:39,069 INFO L443 ceAbstractionStarter]: For program point L624(lines 624 626) no Hoare annotation was computed. [2019-10-22 11:26:39,069 INFO L439 ceAbstractionStarter]: At program point L600-2(lines 600 603) the Hoare annotation is: false [2019-10-22 11:26:39,069 INFO L443 ceAbstractionStarter]: For program point L600-3(lines 600 603) no Hoare annotation was computed. [2019-10-22 11:26:39,070 INFO L439 ceAbstractionStarter]: At program point L625(lines 613 632) the Hoare annotation is: false [2019-10-22 11:26:39,070 INFO L443 ceAbstractionStarter]: For program point L592(lines 592 598) no Hoare annotation was computed. [2019-10-22 11:26:39,070 INFO L443 ceAbstractionStarter]: For program point L584(lines 584 586) no Hoare annotation was computed. [2019-10-22 11:26:39,070 INFO L443 ceAbstractionStarter]: For program point L584-2(lines 584 586) no Hoare annotation was computed. [2019-10-22 11:26:39,070 INFO L439 ceAbstractionStarter]: At program point L576-2(lines 576 589) the Hoare annotation is: (= (bvadd ULTIMATE.start_main_~len~0 (_ bv4294967294 32)) (_ bv0 32)) [2019-10-22 11:26:39,070 INFO L443 ceAbstractionStarter]: For program point L576-3(lines 576 589) no Hoare annotation was computed. [2019-10-22 11:26:39,071 INFO L446 ceAbstractionStarter]: At program point L593-2(lines 593 597) the Hoare annotation is: true [2019-10-22 11:26:39,071 INFO L439 ceAbstractionStarter]: At program point L618-2(lines 618 621) the Hoare annotation is: (= (bvadd ULTIMATE.start_main_~len~0 (_ bv4294967294 32)) (_ bv0 32)) [2019-10-22 11:26:39,071 INFO L443 ceAbstractionStarter]: For program point L618-3(lines 618 621) no Hoare annotation was computed. [2019-10-22 11:26:39,071 INFO L443 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-10-22 11:26:39,071 INFO L443 ceAbstractionStarter]: For program point L578(lines 578 580) no Hoare annotation was computed. [2019-10-22 11:26:39,071 INFO L443 ceAbstractionStarter]: For program point L578-1(lines 578 580) no Hoare annotation was computed. [2019-10-22 11:26:39,072 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 11:26:39,073 INFO L439 ceAbstractionStarter]: At program point L562(line 562) the Hoare annotation is: (bvsgt ULTIMATE.start_dll_create_~len (_ bv0 32)) [2019-10-22 11:26:39,073 INFO L439 ceAbstractionStarter]: At program point L604(lines 599 605) the Hoare annotation is: false [2019-10-22 11:26:39,087 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvsgt32 [2019-10-22 11:26:39,088 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvsgt32 [2019-10-22 11:26:39,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:26:39 BoogieIcfgContainer [2019-10-22 11:26:39,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:26:39,091 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:26:39,091 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:26:39,097 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:26:39,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:37" (3/4) ... [2019-10-22 11:26:39,101 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:26:39,119 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-10-22 11:26:39,119 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 11:26:39,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-10-22 11:26:39,201 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1a3bc18c-f321-4bf8-a70d-361332853514/bin/utaipan/witness.graphml [2019-10-22 11:26:39,201 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:26:39,203 INFO L168 Benchmark]: Toolchain (without parser) took 3067.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 944.3 MB in the beginning and 973.1 MB in the end (delta: -28.8 MB). Peak memory consumption was 96.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:39,203 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:39,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 603.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -160.8 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:39,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:39,208 INFO L168 Benchmark]: Boogie Preprocessor took 37.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:39,208 INFO L168 Benchmark]: RCFGBuilder took 485.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:39,209 INFO L168 Benchmark]: TraceAbstraction took 1772.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 979.8 MB in the end (delta: 94.3 MB). Peak memory consumption was 94.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:39,209 INFO L168 Benchmark]: Witness Printer took 109.89 ms. Allocated memory is still 1.2 GB. Free memory was 979.8 MB in the beginning and 973.1 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:39,211 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 603.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.3 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -160.8 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 53.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 485.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1772.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 979.8 MB in the end (delta: 94.3 MB). Peak memory consumption was 94.3 MB. Max. memory is 11.5 GB. * Witness Printer took 109.89 ms. Allocated memory is still 1.2 GB. Free memory was 979.8 MB in the beginning and 973.1 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation cannot identify Boogie2SMT function ~bvsgt32 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation cannot identify Boogie2SMT function ~bvsgt32 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 630]: 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: 574]: Loop Invariant Derived loop invariant: ~bvadd64(len, 4294967294bv32) == 0bv32 - InvariantResult [Line: 576]: Loop Invariant Derived loop invariant: ~bvadd64(len, 4294967294bv32) == 0bv32 - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: ~bvadd64(len, 4294967294bv32) == 0bv32 - InvariantResult [Line: 607]: Loop Invariant Derived loop invariant: ~bvadd64(len, 4294967294bv32) == 0bv32 && ~bvsge32(i, 0bv32) - InvariantResult [Line: 562]: Loop Invariant [2019-10-22 11:26:39,218 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvsgt32 [2019-10-22 11:26:39,218 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation cannot identify Boogie2SMT function ~bvsgt32 Derived loop invariant: NULL - InvariantResult [Line: 613]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 599]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 613]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 600]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 622]: Loop Invariant Derived loop invariant: ~bvadd64(len, 4294967294bv32) == 0bv32 && ~bvadd64(i, 4294967295bv32) == 0bv32 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 73 SDtfs, 51 SDslu, 92 SDs, 0 SdLazy, 22 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 24 NumberOfFragments, 43 HoareAnnotationTreeSize, 11 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 5748 SizeOfPredicates, 7 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 28/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...