./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_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_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 dd9e7bf35989cde866740706d77fd71a632fd664 ............................................................................................................................................................................................................................................................................................................................................................................................................ 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_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 dd9e7bf35989cde866740706d77fd71a632fd664 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:25:11,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:11,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:11,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:11,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:11,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:11,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:11,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:11,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:11,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:11,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:11,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:11,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:11,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:11,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:11,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:11,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:11,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:11,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:11,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:11,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:11,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:11,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:11,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:11,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:11,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:11,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:11,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:11,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:11,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:11,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:11,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:11,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:11,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:11,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:11,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:11,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:11,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:11,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:11,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:11,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:11,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:11,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:11,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:11,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:11,727 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:11,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:11,728 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:11,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:11,728 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:11,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:11,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:11,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:11,729 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:11,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:11,729 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:11,730 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:11,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:11,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:11,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:11,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:11,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:11,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:11,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:11,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:11,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:11,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:11,733 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:11,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:11,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:11,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:11,733 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_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 -> dd9e7bf35989cde866740706d77fd71a632fd664 [2019-10-22 11:25:11,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:11,766 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:11,768 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:11,770 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:11,770 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:11,771 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-10-22 11:25:11,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/c45fceece/d4afbc595fbb413f82215ef81d905f38/FLAGa105fcbf3 [2019-10-22 11:25:12,261 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:12,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-10-22 11:25:12,271 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/c45fceece/d4afbc595fbb413f82215ef81d905f38/FLAGa105fcbf3 [2019-10-22 11:25:12,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/c45fceece/d4afbc595fbb413f82215ef81d905f38 [2019-10-22 11:25:12,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:12,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:12,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:12,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:12,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:12,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213b4cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12, skipping insertion in model container [2019-10-22 11:25:12,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,299 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:12,342 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:12,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:12,665 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:12,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:12,753 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:12,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12 WrapperNode [2019-10-22 11:25:12,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:12,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:12,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:12,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:12,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:12,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:12,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:12,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:12,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... [2019-10-22 11:25:12,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:12,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:12,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:12,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:12,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 11:25:12,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:25:12,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:25:12,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:25:12,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:25:12,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:25:12,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:25:12,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:12,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:13,169 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:13,170 INFO L284 CfgBuilder]: Removed 22 assume(true) statements. [2019-10-22 11:25:13,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:13 BoogieIcfgContainer [2019-10-22 11:25:13,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:13,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:13,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:13,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:13,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:12" (1/3) ... [2019-10-22 11:25:13,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f24e7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:13, skipping insertion in model container [2019-10-22 11:25:13,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:12" (2/3) ... [2019-10-22 11:25:13,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f24e7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:13, skipping insertion in model container [2019-10-22 11:25:13,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:13" (3/3) ... [2019-10-22 11:25:13,178 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2019-10-22 11:25:13,187 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:13,194 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:13,204 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:13,227 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:13,228 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:13,228 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:13,228 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:13,228 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:13,228 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:13,228 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:13,228 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-22 11:25:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:25:13,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,248 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:13,249 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1121238131, now seen corresponding path program 1 times [2019-10-22 11:25:13,262 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391904874] [2019-10-22 11:25:13,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,366 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 11:25:13,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391904874] [2019-10-22 11:25:13,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:13,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:25:13,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130940447] [2019-10-22 11:25:13,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:25:13,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:13,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:25:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:13,387 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-22 11:25:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,404 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2019-10-22 11:25:13,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:25:13,405 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-10-22 11:25:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,413 INFO L225 Difference]: With dead ends: 50 [2019-10-22 11:25:13,414 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 11:25:13,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 11:25:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-22 11:25:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 11:25:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-22 11:25:13,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2019-10-22 11:25:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,450 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 11:25:13,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:25:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-22 11:25:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:25:13,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,451 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:13,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1860179837, now seen corresponding path program 1 times [2019-10-22 11:25:13,452 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439656122] [2019-10-22 11:25:13,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,513 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 11:25:13,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439656122] [2019-10-22 11:25:13,513 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:13,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 11:25:13,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666525822] [2019-10-22 11:25:13,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:25:13,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:25:13,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:25:13,516 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-10-22 11:25:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,547 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-10-22 11:25:13,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:25:13,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-22 11:25:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,551 INFO L225 Difference]: With dead ends: 42 [2019-10-22 11:25:13,551 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 11:25:13,552 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 11:25:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 11:25:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-10-22 11:25:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:25:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-22 11:25:13,556 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2019-10-22 11:25:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,556 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-22 11:25:13,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:25:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-22 11:25:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:25:13,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,560 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 11:25:13,560 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2027989739, now seen corresponding path program 1 times [2019-10-22 11:25:13,561 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395215790] [2019-10-22 11:25:13,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:13,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395215790] [2019-10-22 11:25:13,636 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:13,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:25:13,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857024351] [2019-10-22 11:25:13,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:25:13,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:13,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:25:13,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:25:13,638 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2019-10-22 11:25:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,683 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-22 11:25:13,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:25:13,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-22 11:25:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,684 INFO L225 Difference]: With dead ends: 44 [2019-10-22 11:25:13,684 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 11:25:13,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:25:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 11:25:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2019-10-22 11:25:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 11:25:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-22 11:25:13,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2019-10-22 11:25:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,689 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-22 11:25:13,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:25:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-22 11:25:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:25:13,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,690 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:13,690 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1761941631, now seen corresponding path program 1 times [2019-10-22 11:25:13,691 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:13,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313893540] [2019-10-22 11:25:13,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:13,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:25:13,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313893540] [2019-10-22 11:25:13,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596688676] [2019-10-22 11:25:13,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 11:25:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:25:13,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:13,954 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:25:13,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1285580966] [2019-10-22 11:25:13,991 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 23 [2019-10-22 11:25:14,026 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:14,027 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:14,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:14,304 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 11:25:14,309 INFO L168 Benchmark]: Toolchain (without parser) took 2023.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 940.5 MB in the beginning and 998.3 MB in the end (delta: -57.8 MB). Peak memory consumption was 84.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,309 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:14,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -178.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,310 INFO L168 Benchmark]: Boogie Preprocessor took 25.15 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 11:25:14,310 INFO L168 Benchmark]: RCFGBuilder took 343.95 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,310 INFO L168 Benchmark]: TraceAbstraction took 1135.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 998.3 MB in the end (delta: 89.5 MB). Peak memory consumption was 89.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:14,312 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 468.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -178.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 47.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.15 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 343.95 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1135.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 998.3 MB in the end (delta: 89.5 MB). Peak memory consumption was 89.5 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 11:25:16,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:16,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:16,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:16,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:16,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:16,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:16,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:16,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:16,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:16,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:16,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:16,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:16,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:16,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:16,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:16,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:16,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:16,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:16,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:16,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:16,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:16,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:16,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:16,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:16,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:16,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:16,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:16,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:16,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:16,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:16,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:16,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:16,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:16,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:16,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:16,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:16,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:16,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:16,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:16,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:16,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:16,224 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:16,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:16,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:16,225 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:16,225 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:16,225 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:16,226 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:16,226 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:16,226 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:16,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:16,227 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:16,228 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:16,228 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:16,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:16,228 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:16,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:16,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:16,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:16,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:16,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:16,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:16,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:16,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:16,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:16,229 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:16,230 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:16,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:16,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:16,230 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_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 -> dd9e7bf35989cde866740706d77fd71a632fd664 [2019-10-22 11:25:16,256 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:16,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:16,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:16,269 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:16,270 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:16,270 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-10-22 11:25:16,322 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/e495929ea/f69f555184f14649a37d245803c9dde0/FLAGf9d21bd6f [2019-10-22 11:25:16,797 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:16,799 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2019-10-22 11:25:16,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/e495929ea/f69f555184f14649a37d245803c9dde0/FLAGf9d21bd6f [2019-10-22 11:25:16,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/data/e495929ea/f69f555184f14649a37d245803c9dde0 [2019-10-22 11:25:16,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:16,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:16,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:16,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:16,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:16,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:16" (1/1) ... [2019-10-22 11:25:16,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1c8bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:16, skipping insertion in model container [2019-10-22 11:25:16,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:16" (1/1) ... [2019-10-22 11:25:16,843 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:16,881 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:17,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:17,251 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:17,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:17,346 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:17,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17 WrapperNode [2019-10-22 11:25:17,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:17,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:17,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:17,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:17,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:17,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:17,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:17,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:17,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... [2019-10-22 11:25:17,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:17,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:17,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:17,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:17,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:25:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:17,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:17,816 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:17,816 INFO L284 CfgBuilder]: Removed 22 assume(true) statements. [2019-10-22 11:25:17,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:17 BoogieIcfgContainer [2019-10-22 11:25:17,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:17,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:17,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:17,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:17,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:16" (1/3) ... [2019-10-22 11:25:17,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b2097b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:17, skipping insertion in model container [2019-10-22 11:25:17,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:17" (2/3) ... [2019-10-22 11:25:17,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b2097b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:17, skipping insertion in model container [2019-10-22 11:25:17,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:17" (3/3) ... [2019-10-22 11:25:17,824 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2019-10-22 11:25:17,833 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:17,839 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:17,846 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:17,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:17,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:17,865 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:17,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:17,865 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:17,865 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:17,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:17,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-22 11:25:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:25:17,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:17,883 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:17,885 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1121238131, now seen corresponding path program 1 times [2019-10-22 11:25:17,896 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:17,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1953809229] [2019-10-22 11:25:17,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 11:25:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:17,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 11:25:17,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,004 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 11:25:18,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,008 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 11:25:18,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1953809229] [2019-10-22 11:25:18,009 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:18,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:25:18,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443158661] [2019-10-22 11:25:18,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 11:25:18,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 11:25:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:18,024 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-22 11:25:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:18,040 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2019-10-22 11:25:18,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 11:25:18,041 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-10-22 11:25:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:18,049 INFO L225 Difference]: With dead ends: 50 [2019-10-22 11:25:18,050 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 11:25:18,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 11:25:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 11:25:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-22 11:25:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 11:25:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-22 11:25:18,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2019-10-22 11:25:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:18,082 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 11:25:18,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 11:25:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-22 11:25:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:25:18,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:18,083 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:18,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:18,284 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1860179837, now seen corresponding path program 1 times [2019-10-22 11:25:18,285 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:18,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1051436063] [2019-10-22 11:25:18,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 11:25:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:18,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:18,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,416 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 11:25:18,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,431 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 11:25:18,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1051436063] [2019-10-22 11:25:18,434 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:18,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 11:25:18,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828109152] [2019-10-22 11:25:18,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:25:18,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:25:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:25:18,437 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2019-10-22 11:25:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:18,474 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-10-22 11:25:18,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:25:18,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-22 11:25:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:18,476 INFO L225 Difference]: With dead ends: 43 [2019-10-22 11:25:18,476 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 11:25:18,477 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 11:25:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 11:25:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-22 11:25:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 11:25:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-22 11:25:18,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2019-10-22 11:25:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:18,482 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-22 11:25:18,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:25:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-22 11:25:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 11:25:18,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:18,484 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 11:25:18,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:18,685 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -650193283, now seen corresponding path program 1 times [2019-10-22 11:25:18,686 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:18,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [186357585] [2019-10-22 11:25:18,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/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 11:25:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:18,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:25:18,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,864 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 11:25:18,865 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,888 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 11:25:18,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186357585] [2019-10-22 11:25:18,889 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:18,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 11:25:18,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006281373] [2019-10-22 11:25:18,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:25:18,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:25:18,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:25:18,891 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2019-10-22 11:25:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:18,977 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2019-10-22 11:25:18,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:18,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-22 11:25:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:18,979 INFO L225 Difference]: With dead ends: 51 [2019-10-22 11:25:18,979 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 11:25:18,980 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 11:25:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 11:25:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-22 11:25:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 11:25:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-22 11:25:18,987 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2019-10-22 11:25:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:18,988 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-22 11:25:18,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:25:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-22 11:25:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 11:25:18,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:18,989 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:19,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:19,190 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 218280017, now seen corresponding path program 1 times [2019-10-22 11:25:19,191 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:19,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1604110451] [2019-10-22 11:25:19,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:19,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:25:19,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:25:19,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 11:25:19,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604110451] [2019-10-22 11:25:19,475 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:19,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:25:19,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175510191] [2019-10-22 11:25:19,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:25:19,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:25:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:19,478 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2019-10-22 11:25:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:19,588 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-22 11:25:19,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:19,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-10-22 11:25:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:19,590 INFO L225 Difference]: With dead ends: 58 [2019-10-22 11:25:19,590 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 11:25:19,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:25:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 11:25:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2019-10-22 11:25:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 11:25:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-22 11:25:19,600 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 31 [2019-10-22 11:25:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:19,600 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-22 11:25:19,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:25:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-22 11:25:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-22 11:25:19,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:19,601 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:19,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:19,805 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:19,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1177402658, now seen corresponding path program 1 times [2019-10-22 11:25:19,806 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:19,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [713218959] [2019-10-22 11:25:19,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:19,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:25:19,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:25:19,993 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-22 11:25:20,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [713218959] [2019-10-22 11:25:20,032 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:20,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:25:20,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590234997] [2019-10-22 11:25:20,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:25:20,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:25:20,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:20,034 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2019-10-22 11:25:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:20,099 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-10-22 11:25:20,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:25:20,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-22 11:25:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:20,100 INFO L225 Difference]: With dead ends: 51 [2019-10-22 11:25:20,100 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 11:25:20,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:25:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 11:25:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2019-10-22 11:25:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:25:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-22 11:25:20,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2019-10-22 11:25:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:20,109 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-22 11:25:20,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:25:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-22 11:25:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 11:25:20,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:20,110 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:20,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:20,311 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2088089927, now seen corresponding path program 1 times [2019-10-22 11:25:20,311 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:20,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [868595059] [2019-10-22 11:25:20,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_428ad5bc-514c-426e-ba5c-6126f159c7e4/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:20,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-22 11:25:20,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:20,609 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-22 11:25:20,610 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,616 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:20,617 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,617 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-10-22 11:25:20,667 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:20,668 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-22 11:25:20,669 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,676 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:20,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,677 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:13 [2019-10-22 11:25:20,727 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-22 11:25:20,727 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,740 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:20,745 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-22 11:25:20,745 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:20,761 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,761 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:19 [2019-10-22 11:25:20,924 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_26|], 2=[|v_#memory_$Pointer$.offset_28|], 6=[|v_#memory_$Pointer$.base_28|]} [2019-10-22 11:25:20,931 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2019-10-22 11:25:20,931 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,964 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:20,973 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 11:25:20,975 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 86 [2019-10-22 11:25:20,977 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:20,990 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,000 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-22 11:25:21,048 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,048 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 165 [2019-10-22 11:25:21,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:21,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:21,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:21,057 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2019-10-22 11:25:21,122 INFO L567 ElimStorePlain]: treesize reduction 323, result has 10.8 percent of original size [2019-10-22 11:25:21,123 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,123 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:140, output treesize:38 [2019-10-22 11:25:21,257 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2019-10-22 11:25:21,258 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,298 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,302 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2019-10-22 11:25:21,303 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,332 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,337 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 11:25:21,338 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2019-10-22 11:25:21,338 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,352 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,352 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:38 [2019-10-22 11:25:21,459 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2019-10-22 11:25:21,459 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,467 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,469 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2019-10-22 11:25:21,470 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,476 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,477 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,477 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2019-10-22 11:25:21,503 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-10-22 11:25:21,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,507 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,507 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:25:21,507 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:7 [2019-10-22 11:25:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:25:21,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:21,826 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:25:21,853 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,857 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:25:21,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:21,865 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-10-22 11:25:21,865 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:47 [2019-10-22 11:25:24,151 INFO L392 ElimStorePlain]: Different costs {1=[|v_#memory_$Pointer$.base_31|, |v_#memory_$Pointer$.offset_31|], 2=[|#memory_int|]} [2019-10-22 11:25:24,154 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:25:24,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:24,206 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 11:25:24,217 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:24,226 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 286 [2019-10-22 11:25:24,227 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-22 11:25:24,466 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2019-10-22 11:25:24,466 INFO L567 ElimStorePlain]: treesize reduction 92, result has 60.5 percent of original size [2019-10-22 11:25:24,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:24,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:24,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:24,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:24,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:24,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:24,475 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-2 vars, End of recursive call: 24 dim-0 vars, and 10 xjuncts. [2019-10-22 11:25:24,475 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:86, output treesize:311 [2019-10-22 11:25:24,788 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2019-10-22 11:25:33,626 WARN L191 SmtUtils]: Spent 8.13 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-22 11:25:33,626 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:33,627 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 63 [2019-10-22 11:25:33,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:33,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,651 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:25:33,651 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 63 [2019-10-22 11:25:33,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:25:33,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:33,666 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-22 11:25:33,667 INFO L392 ElimStorePlain]: Different costs {0=[v_arrayElimCell_14], 1=[v_arrayElimCell_13]} [2019-10-22 11:25:33,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:33,872 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.(DerPreprocessor.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:291) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:335) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) 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 11:25:33,875 INFO L168 Benchmark]: Toolchain (without parser) took 17049.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.5 MB). Free memory was 947.0 MB in the beginning and 1.0 GB in the end (delta: -99.9 MB). Peak memory consumption was 115.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,876 INFO L168 Benchmark]: CDTParser took 0.16 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 11:25:33,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 517.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -182.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,876 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.78 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 11:25:33,877 INFO L168 Benchmark]: Boogie Preprocessor took 44.05 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 11:25:33,877 INFO L168 Benchmark]: RCFGBuilder took 381.34 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: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,878 INFO L168 Benchmark]: TraceAbstraction took 16056.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 50.9 MB). Peak memory consumption was 111.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:33,883 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 517.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -182.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 44.05 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 381.34 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: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16056.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 50.9 MB). Peak memory consumption was 111.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.DerPreprocessor.classify(DerPreprocessor.java:212) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...