./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/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 7716826f9b443d6310df8de2d829a4d2f71b85a7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:36:31,658 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:36:31,659 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:36:31,668 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:36:31,668 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:36:31,669 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:36:31,670 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:36:31,671 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:36:31,672 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:36:31,673 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:36:31,673 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:36:31,674 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:36:31,674 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:36:31,675 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:36:31,676 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:36:31,676 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:36:31,677 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:36:31,678 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:36:31,680 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:36:31,681 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:36:31,682 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:36:31,683 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:36:31,684 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:36:31,684 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:36:31,685 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:36:31,685 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:36:31,686 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:36:31,686 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:36:31,687 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:36:31,688 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:36:31,688 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:36:31,689 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:36:31,689 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:36:31,689 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:36:31,690 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:36:31,690 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:36:31,690 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 16:36:31,700 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:36:31,700 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:36:31,701 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:36:31,701 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:36:31,701 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 16:36:31,701 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 16:36:31,701 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 16:36:31,701 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 16:36:31,701 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 16:36:31,701 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 16:36:31,702 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 16:36:31,702 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 16:36:31,702 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 16:36:31,702 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:36:31,702 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:36:31,703 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:36:31,703 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:36:31,703 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:36:31,703 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 16:36:31,703 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:36:31,703 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 16:36:31,704 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:36:31,704 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:36:31,704 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:36:31,705 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 16:36:31,705 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 16:36:31,705 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:36:31,705 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 16:36:31,705 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 16:36:31,705 INFO L133 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_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/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 -> 7716826f9b443d6310df8de2d829a4d2f71b85a7 [2018-12-08 16:36:31,727 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:36:31,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:36:31,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:36:31,736 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:36:31,737 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:36:31,737 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/../../sv-benchmarks/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i [2018-12-08 16:36:31,772 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/data/38531eaa5/10a88eac6a884b8cb67532a942ff8401/FLAG83cf56279 [2018-12-08 16:36:32,109 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:36:32,109 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/sv-benchmarks/c/list-properties/simple_false-unreach-call_false-valid-memcleanup.i [2018-12-08 16:36:32,115 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/data/38531eaa5/10a88eac6a884b8cb67532a942ff8401/FLAG83cf56279 [2018-12-08 16:36:32,502 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/data/38531eaa5/10a88eac6a884b8cb67532a942ff8401 [2018-12-08 16:36:32,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:36:32,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:36:32,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:36:32,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:36:32,511 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:36:32,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3263b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32, skipping insertion in model container [2018-12-08 16:36:32,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:36:32,541 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:36:32,681 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:36:32,687 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:36:32,746 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:36:32,772 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:36:32,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32 WrapperNode [2018-12-08 16:36:32,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:36:32,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:36:32,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:36:32,773 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:36:32,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:36:32,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:36:32,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:36:32,791 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:36:32,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... [2018-12-08 16:36:32,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:36:32,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:36:32,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:36:32,808 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:36:32,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/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 [2018-12-08 16:36:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-08 16:36:32,839 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-08 16:36:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 16:36:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 16:36:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 16:36:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:36:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:36:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:36:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:36:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-08 16:36:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-08 16:36:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:36:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:36:32,961 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:36:32,962 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-08 16:36:32,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:36:32 BoogieIcfgContainer [2018-12-08 16:36:32,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:36:32,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:36:32,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:36:32,964 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:36:32,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:36:32" (1/3) ... [2018-12-08 16:36:32,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fde753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:36:32, skipping insertion in model container [2018-12-08 16:36:32,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:36:32" (2/3) ... [2018-12-08 16:36:32,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fde753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:36:32, skipping insertion in model container [2018-12-08 16:36:32,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:36:32" (3/3) ... [2018-12-08 16:36:32,966 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_false-unreach-call_false-valid-memcleanup.i [2018-12-08 16:36:32,973 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:36:32,977 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 16:36:32,987 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 16:36:33,005 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:36:33,005 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 16:36:33,005 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:36:33,005 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:36:33,005 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:36:33,005 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:36:33,005 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:36:33,005 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:36:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-12-08 16:36:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 16:36:33,020 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:36:33,021 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:36:33,022 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:36:33,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:36:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1290826951, now seen corresponding path program 1 times [2018-12-08 16:36:33,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:36:33,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:36:33,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,054 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:36:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:36:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:36:33,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:36:33,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 16:36:33,101 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:36:33,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 16:36:33,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 16:36:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 16:36:33,113 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-12-08 16:36:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:36:33,124 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2018-12-08 16:36:33,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 16:36:33,125 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-12-08 16:36:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:36:33,129 INFO L225 Difference]: With dead ends: 38 [2018-12-08 16:36:33,129 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 16:36:33,131 INFO L631 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 [2018-12-08 16:36:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 16:36:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-08 16:36:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 16:36:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 16:36:33,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-08 16:36:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:36:33,151 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 16:36:33,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 16:36:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 16:36:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 16:36:33,152 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:36:33,152 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:36:33,152 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:36:33,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:36:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 918292248, now seen corresponding path program 1 times [2018-12-08 16:36:33,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:36:33,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:36:33,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,153 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:36:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:36:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:36:33,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:36:33,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:36:33,218 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:36:33,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:36:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:36:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:36:33,219 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-12-08 16:36:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:36:33,286 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-12-08 16:36:33,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:36:33,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 16:36:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:36:33,287 INFO L225 Difference]: With dead ends: 33 [2018-12-08 16:36:33,287 INFO L226 Difference]: Without dead ends: 31 [2018-12-08 16:36:33,288 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-12-08 16:36:33,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-08 16:36:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2018-12-08 16:36:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 16:36:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-12-08 16:36:33,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2018-12-08 16:36:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:36:33,291 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-12-08 16:36:33,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:36:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-12-08 16:36:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 16:36:33,292 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:36:33,292 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:36:33,292 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:36:33,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:36:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2092500037, now seen corresponding path program 1 times [2018-12-08 16:36:33,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:36:33,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:36:33,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,293 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:36:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:36:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:36:33,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:36:33,375 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:36:33,376 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-08 16:36:33,377 INFO L205 CegarAbsIntRunner]: [0], [1], [10], [16], [18], [23], [26], [40], [49], [52], [54], [57], [59], [65], [66], [67] [2018-12-08 16:36:33,396 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:36:33,396 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:36:33,492 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:36:33,493 INFO L272 AbstractInterpreter]: Visited 16 different actions 21 times. Merged at 5 different actions 5 times. Never widened. Performed 121 root evaluator evaluations with a maximum evaluation depth of 3. Performed 121 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-12-08 16:36:33,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:36:33,502 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:36:33,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:36:33,503 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:36:33,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:36:33,509 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:36:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:36:33,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:36:33,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 11 treesize of output 8 [2018-12-08 16:36:33,570 INFO L478 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 8 treesize of output 7 [2018-12-08 16:36:33,570 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,572 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 11 treesize of output 8 [2018-12-08 16:36:33,579 INFO L478 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 8 treesize of output 7 [2018-12-08 16:36:33,579 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,580 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,584 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,584 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2018-12-08 16:36:33,598 INFO L478 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 15 treesize of output 11 [2018-12-08 16:36:33,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 11 treesize of output 3 [2018-12-08 16:36:33,601 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,603 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,610 INFO L478 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 15 treesize of output 11 [2018-12-08 16:36:33,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 11 treesize of output 3 [2018-12-08 16:36:33,612 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,613 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,617 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,618 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2018-12-08 16:36:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:36:33,619 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:36:33,656 INFO L478 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 13 treesize of output 11 [2018-12-08 16:36:33,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 3 [2018-12-08 16:36:33,658 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,659 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,660 INFO L478 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 13 treesize of output 11 [2018-12-08 16:36:33,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 3 [2018-12-08 16:36:33,662 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,663 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 16:36:33,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-08 16:36:33,671 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2018-12-08 16:36:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:36:33,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:36:33,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 8 [2018-12-08 16:36:33,699 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:36:33,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 16:36:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 16:36:33,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-12-08 16:36:33,700 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-12-08 16:36:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:36:33,749 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-12-08 16:36:33,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 16:36:33,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-08 16:36:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:36:33,750 INFO L225 Difference]: With dead ends: 37 [2018-12-08 16:36:33,750 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 16:36:33,751 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-12-08 16:36:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 16:36:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-12-08 16:36:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-08 16:36:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-08 16:36:33,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-12-08 16:36:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:36:33,754 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-08 16:36:33,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 16:36:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-08 16:36:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-08 16:36:33,755 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:36:33,755 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:36:33,755 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:36:33,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:36:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645057, now seen corresponding path program 1 times [2018-12-08 16:36:33,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:36:33,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:36:33,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:36:33,757 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:36:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 16:36:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 16:36:33,789 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 16:36:33,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 04:36:33 BoogieIcfgContainer [2018-12-08 16:36:33,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 16:36:33,806 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 16:36:33,806 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 16:36:33,806 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 16:36:33,807 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:36:32" (3/4) ... [2018-12-08 16:36:33,808 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 16:36:33,835 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_79aa793c-ab03-4838-a1c1-306c4c1c7dc7/bin-2019/utaipan/witness.graphml [2018-12-08 16:36:33,836 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 16:36:33,836 INFO L168 Benchmark]: Toolchain (without parser) took 1330.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 951.3 MB in the beginning and 979.0 MB in the end (delta: -27.7 MB). Peak memory consumption was 117.6 MB. Max. memory is 11.5 GB. [2018-12-08 16:36:33,837 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:36:33,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -175.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 11.5 GB. [2018-12-08 16:36:33,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.75 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. [2018-12-08 16:36:33,838 INFO L168 Benchmark]: Boogie Preprocessor took 16.74 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. [2018-12-08 16:36:33,838 INFO L168 Benchmark]: RCFGBuilder took 154.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2018-12-08 16:36:33,838 INFO L168 Benchmark]: TraceAbstraction took 843.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 985.5 MB in the end (delta: 117.5 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. [2018-12-08 16:36:33,838 INFO L168 Benchmark]: Witness Printer took 29.47 ms. Allocated memory is still 1.2 GB. Free memory was 985.5 MB in the beginning and 979.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-12-08 16:36:33,840 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 264.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -175.9 MB). Peak memory consumption was 29.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.75 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 16.74 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 154.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 843.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 985.5 MB in the end (delta: 117.5 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. * Witness Printer took 29.47 ms. Allocated memory is still 1.2 GB. Free memory was 985.5 MB in the beginning and 979.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 644]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] List a = (List) malloc(sizeof(struct node)); VAL [a={15:0}, malloc(sizeof(struct node))={15:0}] [L628] COND FALSE !(a == 0) VAL [a={15:0}, malloc(sizeof(struct node))={15:0}] [L629] List t; [L630] List p = a; [L631] a->h = 2 VAL [a={15:0}, malloc(sizeof(struct node))={15:0}, p={15:0}] [L632] COND TRUE __VERIFIER_nondet_int() [L633] p->h = 1 [L634] t = (List) malloc(sizeof(struct node)) VAL [a={15:0}, malloc(sizeof(struct node))={15:0}, malloc(sizeof(struct node))={20:0}, p={15:0}, t={20:0}] [L635] COND FALSE !(t == 0) VAL [a={15:0}, malloc(sizeof(struct node))={15:0}, malloc(sizeof(struct node))={20:0}, p={15:0}, t={20:0}] [L636] p->n = t [L637] EXPR p->n [L637] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L639] p->h = 2 [L640] p->n = 0 [L641] p = a VAL [a={15:0}, malloc(sizeof(struct node))={15:0}, malloc(sizeof(struct node))={20:0}, p={15:0}, t={20:0}] [L642] COND TRUE p!=0 [L643] EXPR p->h VAL [a={15:0}, malloc(sizeof(struct node))={15:0}, malloc(sizeof(struct node))={20:0}, p={15:0}, p->h=1, t={20:0}] [L643] COND TRUE p->h != 2 [L644] __VERIFIER_error() VAL [a={15:0}, malloc(sizeof(struct node))={15:0}, malloc(sizeof(struct node))={20:0}, p={15:0}, t={20:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. UNSAFE Result, 0.8s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 39 SDslu, 75 SDs, 0 SdLazy, 54 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 5867 SizeOfPredicates, 7 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...